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Gastrointestinal cancer
Varlitinib and Paclitaxel for EGFR/HER2 Co-expressing Advanced Gastric Cancer: A Multicenter Phase Ib/II Study (K-MASTER-13)
Dong-Hoe Koo, Minkyu Jung, Yeul Hong Kim, Hei-Cheul Jeung, Dae Young Zang, Woo Kyun Bae, Hyunki Kim, Hyo Song Kim, Choong-kun Lee, Woo Sun Kwon, Hyun Cheol Chung, Sun Young Rha
Cancer Res Treat. 2024;56(4):1136-1145.   Published online April 29, 2024
DOI: https://doi.org/10.4143/crt.2023.1324
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
Varlitinib is a pan-human epidermal growth factor receptor (HER) inhibitor targeting epidermal growth factor receptor (EGFR), human epidermal growth factor receptor 2 (HER2), and HER4. We present a phase Ib/II study of a combination of varlitinib and weekly paclitaxel as a second-line treatment for patients with EGFR/HER2 co-expressing advanced gastric cancer (AGC).
Materials and Methods
Patients whose tumors with EGFR and HER2 overexpression by immunohistochemistry (≥ 1+) were enrolled. Varlitinib and paclitaxel were investigated every 4 weeks. After determining the recommended phase II dose (RP2D) in phase Ib, a phase II study was conducted to evaluate the antitumor activity.
Results
RP2D was treated with a combination of varlitinib (300 mg twice daily) and paclitaxel. Among 27 patients treated with RP2D, the median progression-free survival and overall survival (OS) were 3.3 months (95% confidence interval [CI], 1.7 to 4.9) and 7.9 months (95% CI, 5.0 to 10.8), respectively, with a median follow-up of 15.7 months. Among 16 patients with measurable disease, the objective response rate (ORR) and disease control rate were 31% and 88%, respectively. Patients with strong HER2 expression (n=8) had a higher ORR and longer OS, whereas those with strong EGFR expression (n=3) had poorer outcomes. The most common adverse events (AEs) of any grade were neutropenia (52%), diarrhea (27%), aspartate aminotransferase/alanine transaminase elevation (22%), and nausea (19%). No treatment-related deaths or unexpected AEs resulting from treatment cessation were observed in patients with RP2D.
Conclusion
A combination of varlitinib and paclitaxel displayed manageable toxicity and modest antitumor activity in patients with EGFR/HER2 co-expressing AGC who progressed after first-line chemotherapy.

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  • Unraveling the future: Innovative design strategies and emerging challenges in HER2-targeted tyrosine kinase inhibitors for cancer therapy
    Sixiang Zheng, Ruixian Chen, Lele Zhang, Lun Tan, Lintao Li, Fangyi Long, Ting Wang
    European Journal of Medicinal Chemistry.2024; 276: 116702.     CrossRef
  • 1,551 View
  • 117 Download
  • 1 Web of Science
  • 1 Crossref
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Breast cancer
Genomic Signatures from Clinical Tumor Sequencing in Patients with Breast Cancer Having Germline BRCA1/2 Mutation
Ju Won Kim, Hyo Eun Kang, Jimi Choi, Seung Gyu Yun, Seung Pil Jung, Soo Yeon Bae, Ji Young You, Yoon-Ji Choi, Yeul Hong Kim, Kyong Hwa Park
Cancer Res Treat. 2023;55(1):155-166.   Published online June 8, 2022
DOI: https://doi.org/10.4143/crt.2021.1567
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
BRCA1 and BRCA2 are among the most important genes involved in DNA repair via homologous recombination (HR). Germline BRCA1/2 (gBRCA1/2)-related cancers have specific characteristics and treatment options but conducting gBRCA1/2 testing and interpreting the genetic imprint are sometimes complicated. Here, we describe the concordance of gBRCA1/2 derived from a panel of clinical tumor tissues using next-generation sequencing (NGS) and genetic aspects of tumors harboring gBRCA1/2 pathogenic variants.
Materials and Methods
Targeted sequencing was performed using available tumor tissue from patients who underwent gBRCA1/2 testing. Comparative genomic analysis was performed according to gBRCA1/2 pathogenicity.
Results
A total of 321 patients who underwent gBRCA1/2 testing were screened, and 26 patients with gBRCA1/2 pathogenic (gBRCA1/2p) variants, eight patients with gBRCA1/2 variants of uncertain significance (VUS; gBRCA1/2v), and 43 patients with gBRCA1/2 wild-type (gBRCA1/2w) were included in analysis. Mutations in TP53 (49.4%) and PIK3CA (23.4%) were frequently detected in all samples. The number of single-nucleotide variants (SNVs) per tumor tissue was higher in the gBRCA1/2w group than that in the gBRCA1/2p group (14.81 vs. 18.86, p=0.278). Tumor mutation burden (TMB) was significantly higher in the gBRCA1/2w group than in the gBRCA1/2p group (10.21 vs. 13.47, p=0.017). Except for BRCA1/2, other HR-related genes were frequently mutated in patients with gBRCA1/2w.
Conclusion
We demonstrated high sensitivity of gBRCA1/2 in tumors analyzed by NGS using a panel of tumor tissues. TMB value and aberration of non-BRCA1/2 HR-related genes differed significantly according to gBRCA1/2 pathogenicity in patients with breast cancer.

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  • Clinico-Pathological Factors Determining Recurrence of Phyllodes Tumors of the Breast: The 25-Year Experience at a Tertiary Cancer Centre
    Baijaeek Sain, Arnab Gupta, Aruni Ghose, Sudip Halder, Vishal Mukherjee, Samir Bhattacharya, Radha Raman Mondal, Aditya Narayan Sen, Bijan Saha, Shravasti Roy, Stergios Boussios
    Journal of Personalized Medicine.2023; 13(5): 866.     CrossRef
  • 6,047 View
  • 201 Download
  • 1 Web of Science
  • 1 Crossref
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General
Comparison of the Data of a Next-Generation Sequencing Panel from K-MASTER Project with That of Orthogonal Methods for Detecting Targetable Genetic Alterations
Yoon Ji Choi, Jung Yoon Choi, Ju Won Kim, Ah Reum Lim, Youngwoo Lee, Won Jin Chang, Soohyeon Lee, Jae Sook Sung, Hee-Joon Chung, Jong Won Lee, Eun Joo Kang, Jung Sun Kim, Taekyu Lim, Hye Sook Kim, Yu Jung Kim, Mi Sun Ahn, Young Saing Kim, Ji Hyun Park, Seungtaek Lim, Sung Shim Cho, Jang Ho Cho, Sang Won Shin, Kyong Hwa Park, Yeul Hong Kim
Cancer Res Treat. 2022;54(1):30-39.   Published online May 20, 2021
DOI: https://doi.org/10.4143/crt.2021.218
AbstractAbstract PDFPubReaderePub
Purpose
K-MASTER project is a Korean national precision medicine platform that screened actionable mutations by analyzing next-generation sequencing (NGS) of solid tumor patients. We compared gene analyses between NGS panel from the K-MASTER project and orthogonal methods.
Materials and Methods
Colorectal, breast, non–small cell lung, and gastric cancer patients were included. We compared NGS results from K-MASTER projects with those of non-NGS orthogonal methods (KRAS, NRAS, and BRAF mutations in colorectal cancer [CRC]; epidermal growth factor receptor [EGFR], anaplastic lymphoma kinase [ALK] fusion, and reactive oxygen species 1 [ROS1] fusion in non–small cell lung cancer [NSCLC], and Erb-B2 receptor tyrosine kinase 2 (ERBB2) positivity in breast and gastric cancers).
Results
In the CRC cohort (n=225), the sensitivity and specificity of NGS were 87.4% and 79.3% (KRAS); 88.9% and 98.9% (NRAS); and 77.8% and 100.0% (BRAF), respectively. In the NSCLC cohort (n=109), the sensitivity and specificity of NGS for EGFR were 86.2% and 97.5%, respectively. The concordance rate for ALK fusion was 100%, but ROS1 fusion was positive in only one of three cases that were positive in orthogonal tests. In the breast cancer cohort (n=260), ERBB2 amplification was detected in 45 by NGS. Compared with orthogonal methods that integrated immunohistochemistry and in situ hybridization, sensitivity and specificity were 53.7% and 99.4%, respectively. In the gastric cancer cohort (n=64), ERBB2 amplification was detected in six by NGS. Compared with orthogonal methods, sensitivity and specificity were 62.5% and 98.2%, respectively.
Conclusion
The results of the K-MASTER NGS panel and orthogonal methods showed a different degree of agreement for each genetic alteration, but generally showed a high agreement rate.

Citations

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  • Integrated clinical and genomic models using machine-learning methods to predict the efficacy of paclitaxel-based chemotherapy in patients with advanced gastric cancer
    Yonghwa Choi, Jangwoo Lee, Keewon Shin, Ji Won Lee, Ju Won Kim, Soohyeon Lee, Yoon Ji Choi, Kyong Hwa Park, Jwa Hoon Kim
    BMC Cancer.2024;[Epub]     CrossRef
  • Supporting Biomarker-Driven Therapies in Oncology: A Genomic Testing Cost Calculator
    Albrecht Stenzinger, Brian Cuffel, Noman Paracha, Eric Vail, Jesus Garcia-Foncillas, Clifford Goodman, Ulrik Lassen, Gilles Vassal, Sean D Sullivan
    The Oncologist.2023; 28(5): e242.     CrossRef
  • Genomic analysis of plasma circulating tumor DNA in patients with heavily pretreated HER2 + metastatic breast cancer
    Kyoungmin Lee, Jongwon Lee, Jungmin Choi, Sung Hoon Sim, Jeong Eun Kim, Min Hwan Kim, Yeon Hee Park, Jee Hyun Kim, Su-Jin Koh, Kyong Hwa Park, Myoung Joo Kang, Mi Sun Ahn, Kyoung Eun Lee, Hee-Jun Kim, Hee Kyung Ahn, Han Jo Kim, Keon Uk Park, In Hae Park
    Scientific Reports.2023;[Epub]     CrossRef
  • Recommendations for the Use of Next-Generation Sequencing and the Molecular Tumor Board for Patients with Advanced Cancer: A Report from KSMO and KCSG Precision Medicine Networking Group
    Shinkyo Yoon, Miso Kim, Yong Sang Hong, Han Sang Kim, Seung Tae Kim, Jihun Kim, Hongseok Yun, Changhoon Yoo, Hee Kyung Ahn, Hyo Song Kim, In Hee Lee, In-Ho Kim, Inkeun Park, Jae Ho Jeong, Jaekyung Cheon, Jin Won Kim, Jina Yun, Sun Min Lim, Yongjun Cha, Se
    Cancer Research and Treatment.2022; 54(1): 1.     CrossRef
  • 8,412 View
  • 256 Download
  • 5 Web of Science
  • 4 Crossref
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Gastrointestinal cancer
Clinical Application of Targeted Deep Sequencing in Metastatic Colorectal Cancer Patients: Actionable Genomic Alteration in K-MASTER Project
Youngwoo Lee, Soohyeon Lee, Jae Sook Sung, Hee-Joon Chung, Ah-reum Lim, Ju Won Kim, Yoon Ji Choi, Kyong Hwa Park, Yeul Hong Kim
Cancer Res Treat. 2021;53(1):123-130.   Published online August 18, 2020
DOI: https://doi.org/10.4143/crt.2020.559
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
Next-generation sequencing (NGS) can facilitate precision medicine approaches in metastatic colorectal cancer (mCRC) patients. We investigated the molecular profiling of Korean mCRC patients under the K-MASTER project which was initiated in June 2017 as a nationwide precision medicine oncology clinical trial platform which used NGS assay to screen actionable mutations.
Materials and Methods
As of 22 January 2020, total of 994 mCRC patients were registered in K-MASTER project. Targeted sequencing was performed using three platforms which were composed of the K-MASTER cancer panel v1.1 and the SNUH FIRST Cancer Panel v3.01. If tumor tissue was not available, cell-free DNA was extracted and the targeted sequencing was performed by Axen Cancer Panel as a liquid biopsy.
Results
In 994 mCRC patients, we found 1,564 clinically meaningful pathogenic variants which mutated in 71 genes. Anti-EGFR therapy candidates were 467 patients (47.0%) and BRAF V600E mutation (n=47, 4.7%), deficient mismatch repair/microsatellite instability–high (n=15, 1.5%), HER2 amplifications (n=10, 1.0%) could be incorporated with recently approved drugs. The patients with high tumor mutation burden (n=101, 12.7%) and DNA damaging response and repair defect pathway alteration (n=42, 4.2%) could be enrolled clinical trials with immune checkpoint inhibitors. There were more colorectal cancer molecular alterations such as PIK3CA, KRAS G12C, atypical BRAF, and HER2 mutations and even rarer but actionable genes that approved or ongoing clinical trials in other solid tumors.
Conclusion
K-MASTER project provides an intriguing background to investigate new clinical trials with biomarkers and give therapeutic opportunity for mCRC patients.

Citations

Citations to this article as recorded by  
  • Tumor mutational burden in colorectal cancer: Implications for treatment
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  • Integrated clinical and genomic models using machine-learning methods to predict the efficacy of paclitaxel-based chemotherapy in patients with advanced gastric cancer
    Yonghwa Choi, Jangwoo Lee, Keewon Shin, Ji Won Lee, Ju Won Kim, Soohyeon Lee, Yoon Ji Choi, Kyong Hwa Park, Jwa Hoon Kim
    BMC Cancer.2024;[Epub]     CrossRef
  • PIK3CA Mutation is Associated with Poor Response to HER2-Targeted Therapy in Breast Cancer Patients
    Ju Won Kim, Ah Reum Lim, Ji Young You, Jung Hyun Lee, Sung Eun Song, Nam Kwon Lee, Seung Pil Jung, Kyu Ran Cho, Cheol Yong Kim, Kyong Hwa Park
    Cancer Research and Treatment.2023; 55(2): 531.     CrossRef
  • Genomic analysis of plasma circulating tumor DNA in patients with heavily pretreated HER2 + metastatic breast cancer
    Kyoungmin Lee, Jongwon Lee, Jungmin Choi, Sung Hoon Sim, Jeong Eun Kim, Min Hwan Kim, Yeon Hee Park, Jee Hyun Kim, Su-Jin Koh, Kyong Hwa Park, Myoung Joo Kang, Mi Sun Ahn, Kyoung Eun Lee, Hee-Jun Kim, Hee Kyung Ahn, Han Jo Kim, Keon Uk Park, In Hae Park
    Scientific Reports.2023;[Epub]     CrossRef
  • Comparison of the Data of a Next-Generation Sequencing Panel from K-MASTER Project with That of Orthogonal Methods for Detecting Targetable Genetic Alterations
    Yoon Ji Choi, Jung Yoon Choi, Ju Won Kim, Ah Reum Lim, Youngwoo Lee, Won Jin Chang, Soohyeon Lee, Jae Sook Sung, Hee-Joon Chung, Jong Won Lee, Eun Joo Kang, Jung Sun Kim, Taekyu Lim, Hye Sook Kim, Yu Jung Kim, Mi Sun Ahn, Young Saing Kim, Ji Hyun Park, Se
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    Shinkyo Yoon, Miso Kim, Yong Sang Hong, Han Sang Kim, Seung Tae Kim, Jihun Kim, Hongseok Yun, Changhoon Yoo, Hee Kyung Ahn, Hyo Song Kim, In Hee Lee, In-Ho Kim, Inkeun Park, Jae Ho Jeong, Jaekyung Cheon, Jin Won Kim, Jina Yun, Sun Min Lim, Yongjun Cha, Se
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A Phase II Study of Avelumab Monotherapy in Patients with Mismatch Repair–Deficient/Microsatellite Instability–High or POLE-Mutated Metastatic or Unresectable Colorectal Cancer
Jwa Hoon Kim, Sun Young Kim, Ji Yeon Baek, Yong Jun Cha, Joong Bae Ahn, Han Sang Kim, Keun-Wook Lee, Ji-Won Kim, Tae-You Kim, Won Jin Chang, Joon Oh Park, Jihun Kim, Jeong Eun Kim, Yong Sang Hong, Yeul Hong Kim, Tae Won Kim
Cancer Res Treat. 2020;52(4):1135-1144.   Published online April 24, 2020
DOI: https://doi.org/10.4143/crt.2020.218
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
We evaluated the efficacy and safety of avelumab, an anti-PD-L1 antibody, in patients with metastatic or unresectable colorectal cancer (mCRC) with mismatch repair deficiency (dMMR)/microsatellite instability-high (MSI-H) or POLE mutations.
Materials and Methods
In this prospective, open-label, multicenter phase II study, 33 patients with mCRC harboring dMMR/MSI-H or POLE mutations after failure of ≥1st-line chemotherapy received avelumab 10 mg/kg every 2 weeks. dMMR/MSI-H was confirmed with immunohistochemical staining (IHC) by loss of expression of MMR proteins or polymerase chain reaction (PCR) for microsatellite sequences. POLE mutation was confirmed by next-generation sequencing (NGS). The primary endpoint was the objective response rate (ORR) by Response Evaluation Criteria in Solid Tumors ver. 1.1.
Results
The median age was 60 years, and 78.8% were male. Thirty patients were dMMR/MSI-H and three had POLE mutations. The ORR was 24.2%, and all of the responders were dMMR/MSI-H. For 21 patients with MSI-H by PCR or NGS, the ORR was 28.6%. At a median follow-up duration of 16.3 months, median progression-free survival and overall survival were 3.9 and 13.2 months in all patients, and 8.1 months and not reached, respectively, in patients with MSI-H by PCR or NGS. Dose interruption and discontinuation due to treatment-related adverse events occurred in 4 and 2 patients, respectively, with no treatment-related deaths.
Conclusion
Avelumab displayed antitumor activity with manageable toxicity in patients with previously treated mCRC harboring dMMR/MSI-H. Diagnosis of dMMR/MSI-H with PCR or NGS could be complementary to IHC to select patients who would benefit from immunotherapy.

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    Romain Cohen, Jaafar Bennouna, Aurélia Meurisse, Christophe Tournigand, Christelle De La Fouchardière, David Tougeron, Christophe Borg, Thibault Mazard, Benoist Chibaudel, Marie-Line Garcia-Larnicol, Magali Svrcek, Dewi Vernerey, Yves Menu, Thierry André
    Journal for ImmunoTherapy of Cancer.2020; 8(2): e001499.     CrossRef
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    OncoTargets and Therapy.2020; Volume 13: 11645.     CrossRef
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    Japanese Journal of Clinical Oncology.2020;[Epub]     CrossRef
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Clinical Implication of Concordant or Discordant Genomic Profiling between Primary and Matched Metastatic Tissues in Patients with Colorectal Cancer
Jung Yoon Choi, Sunho Choi, Minhyeok Lee, Young Soo Park, Jae Sook Sung, Won Jin Chang, Ju Won Kim, Yoon Ji Choi, Jin Kim, Dong-Sik Kim, Sung-Ho Lee, Junhee Seok, Kyong Hwa Park, Seon Hahn Kim, Yeul Hong Kim
Cancer Res Treat. 2020;52(3):764-778.   Published online February 16, 2020
DOI: https://doi.org/10.4143/crt.2020.044
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
The purpose of this study was to identify the concordant or discordant genomic profiling between primary and matched metastatic tumors in patients with colorectal cancer (CRC) and to explore the clinical implication.
Materials and Methods
Surgical samples of primary and matched metastatic tissues from 158 patients (335 samples) with CRC at Korea University Anam Hospital were evaluated using the Ion AmpliSeq Cancer Hotspot Panel. We compared genetic variants and classified them as concordant, primary-specific, and metastasis-specific variants. We used a combination of principal components analysis and clustering to find genomic groups. Kaplan-Meier curves were used to appraise survival between genomic groups. We used machine learning to confirm the correlation between genetic variants and metastatic sites.
Results
A total of 282 types of deleterious non-synonymous variants were selected for analysis. Of a total of 897 variants, an average of 40% was discordant. Three genomic groups were yielded based on the genomic discrepancy patterns. Overall survival differed significantly between the genomic groups. The poorest group had the highest proportion of concordant KRAS G12V and additional metastasis-specific SMAD4. Correlation analysis between genetic variants and metastatic sites suggested that concordant KRAS mutations would have more disseminated metastases.
Conclusion
Driver gene mutations were mostly concordant; however, discordant or metastasis-specific mutations were present. Clinically, the concordant driver genetic changes with additional metastasis-specific variants can predict poor prognosis for patients with CRC.

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Special Article
Behaviors and Attitudes toward the Use of Complementary and Alternative Medicine among Korean Cancer Patients
Jung Hye Kwon, Sang-Cheol Lee, Myung Ah Lee, Yu Jung Kim, Jung Hun Kang, Jin Young Kim, Hyo Jin Lee, Woo Kyun Bae, Mi-Jung Kim, Eui Kyu Chie, Jin Kim, Yeul Hong Kim, Hyun Cheol Chung, Sun Young Rha
Cancer Res Treat. 2019;51(3):851-860.   Published online June 7, 2019
DOI: https://doi.org/10.4143/crt.2019.137
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
A cross-sectional survey was conducted to explore the current awareness and use of complementary and alternative medicine (CAM), as well as attitudes toward CAM, in patients with cancer and their family members in South Korea.
Materials and Methods
Between September 21 and October 31, 2017, a 25-item questionnaire regarding CAM experiences among cancer patients and their family members was conducted in 10 oncology clinics in South Korea after institutional review board approval at each institution.
Results
In total, 283/310 patients were analyzed. The median age was 60 years, and 60% were male. Most of the patients were actively receiving anticancer treatment at the time of the survey. A total of 106 patients (37%) had experienced a median of two types (interquartile range, 1 to 3) of CAM. Belief in CAM (odds ratio [OR], 3.015; 95% confidence interval [CI], 1.611 to 5.640) and duration of disease (OR, 1.012; 95% CI, 1.004 to 1.020) were independent factors for using CAM in multivariable analysis. Belief in CAM was significantly associated with current use of CAM (OR, 3.633; 95% CI, 1.567 to 8.424). Lay referral was the most common reason for deciding to use CAM, and only 25% of patients (72/283) discussed CAM with their physicians.
Conclusion
Patient attitudes toward and confidence in CAM modalities were strongly associated with their CAM experiences, and only a small number of patients had an open discussion about CAM with their physicians. A patient education program for CAM is needed.

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    Kyeore Bae
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    Aneta Brygida Jędrzejewska, Barbara Janina Ślusarska, Grzegorz Józef Nowicki
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    Kathryn Knecht, David Kinder, Amy Stockert
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Erratum
ERRATUM: Caveolin-1 Modulates Docetaxel-Induced Cell Death in Breast Cancer Cell Subtypes through Different Mechanisms
Jinho Kang, Joo Hee Park, Hye Jin Lee, Ukhyun Jo, Jong Kuk Park, Jae Hong Seo, Yeul Hong Kim, Insun Kim, Kyong Hwa Park
Cancer Res Treat. 2019;51(3):1257-1257.   Published online June 5, 2019
DOI: https://doi.org/10.4143/crt.2015.227.2
Corrects: Cancer Res Treat 2016;48(2):715
PDFPubReaderePub
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Original Articles
Landscape of Actionable Genetic Alterations Profiled from 1,071 Tumor Samples in Korean Cancer Patients
Se-Hoon Lee, Boram Lee, Joon Ho Shim, Kwang Woo Lee, Jae Won Yun, Sook-Young Kim, Tae-You Kim, Yeul Hong Kim, Young Hyeh Ko, Hyun Cheol Chung, Chang Sik Yu, Jeeyun Lee, Sun Young Rha, Tae Won Kim, Kyung Hae Jung, Seock-Ah Im, Hyeong-Gon Moon, Sukki Cho, Jin Hyoung Kang, Jihun Kim, Sang Kyum Kim, Han Suk Ryu, Sang Yun Ha, Jong Il Kim, Yeun-Jun Chung, Cheolmin Kim, Hyung-Lae Kim, Woong-Yang Park, Dong-Young Noh, Keunchil Park
Cancer Res Treat. 2019;51(1):211-222.   Published online April 23, 2018
DOI: https://doi.org/10.4143/crt.2018.132
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
With the emergence of next-generation sequencing (NGS) technology, profiling a wide range of genomic alterations has become a possibility resulting in improved implementation of targeted cancer therapy. In Asian populations, the prevalence and spectrum of clinically actionable genetic alterations has not yet been determined because of a lack of studies examining high-throughput cancer genomic data.
Materials and Methods
To address this issue, 1,071 tumor samples were collected from five major cancer institutes in Korea and analyzed using targeted NGS at a centralized laboratory. Samples were either fresh frozen or formalin-fixed, paraffin embedded (FFPE) and the quality and yield of extracted genomic DNA was assessed. In order to estimate the effect of sample condition on the quality of sequencing results, tissue preparation method, specimen type (resected or biopsied) and tissue storage time were compared.
Results
We detected 7,360 non-synonymous point mutations, 1,164 small insertions and deletions, 3,173 copy number alterations, and 462 structural variants. Fifty-four percent of tumors had one or more clinically relevant genetic mutation. The distribution of actionable variants was variable among different genes. Fresh frozen tissues, surgically resected specimens, and recently obtained specimens generated superior sequencing results over FFPE tissues, biopsied specimens, and tissues with long storage duration.
Conclusion
In order to overcome, challenges involved in bringing NGS testing into routine clinical use, a centralized laboratory model was designed that could improve the NGS workflows, provide appropriate turnaround times and control costs with goal of enabling precision medicine.

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Gemcitabine and Docetaxel Combination for Advanced Soft Tissue Sarcoma: A Nationwide Retrospective Study
Yunjung Choi, Mi Sun Yun, Sang Hee Lim, Jeeyun Lee, Jin-Hee Ahn, Yu Jung Kim, Kyong Hwa Park, Young Suk Park, Ho Yeong Lim, Hyonggin An, Dong-Churl Suh, Yeul Hong Kim
Cancer Res Treat. 2018;50(1):175-182.   Published online March 30, 2017
DOI: https://doi.org/10.4143/crt.2016.535
AbstractAbstract PDFPubReaderePub
Purpose
This nationwide retrospective study was conducted to evaluate the efficacy and safety of combined gemcitabine and docetaxel (GD) as an off-label therapy for advanced soft tissue sarcoma, which has limited treatment options owing to its rare occurrence.
Materials and Methods
A total of 228 patients received GD therapy for advanced soft tissue sarcoma from 2009 to 2014 in Korea. We retrospectively reviewed the clinical medical records and claims data of these patients.
Results
A total of 218 patients in 20 medical centers were included in the final analysis (median age, 50.0 years). The objective response rate was 15.1% (34/218, in the leiomyosarcoma subgroup; 26.3%). The median overall survival and progression-free survival were 10.3 months (95% confidence interval [CI], 8.4 to 12.2) and 3.3 months (95% CI, 2.8 to 4.7), respectively. The treatment was discontinued in 7.8% of patients owing to adverse events; however, there was no adverse event-related death. Neutropenia (35.7%) and anemia (15.1%) were the most frequent grade 3/4 toxicities. Univariate analysis for identifying the predictors of the progression-free survival period revealed that patients aged ≤ 50 years had a hazard ratio of 1.388 (95% CI, 1.027 to 1.875; p < 0.05) relative to those aged > 50 years, and the group with leiomyosarcoma had a hazard ratio of 0.693 (95% CI, 0.493 to 0.975; p < 0.05) relative to the group with other histopathological subtypes.
Conclusion
GD therapy was tolerable and effective for Korean patients with soft tissue sarcoma. In conclusion, for patients with advanced soft tissue sarcoma, especially leiomyosarcoma, GD therapy could be an important therapeutic option.

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Special Article
Symposium: “Oncology Leadership in Asia”
Dong-Young Noh, Jae Kyung Roh, Yeul Hong Kim, Kazuhiro Yoshida, Hideo Baba, Marie Cherry Lynn Samson-Fernando, Sanjeev Misra, Zeba Aziz, Rainy Umbas, Yogendra P. Singh, Tony Shu Kam Mok, Han-Kwang Yang, Hideyuki Akaza
Cancer Res Treat. 2017;49(2):283-291.   Published online March 9, 2017
DOI: https://doi.org/10.4143/crt.2017.090
AbstractAbstract PDFPubReaderePub
The symposium on “Oncology Leadership in Asia” was held as part of the official program of the 42nd Annual Meeting of the Korean Cancer Association with International Cancer Conference. Given the increasing incidence of cancer in all countries and regions of Asia, regardless of developmental stage, and also in light of the recognized need for Asian countries to enhance collaboration in cancer prevention, research, treatment and follow-up, the symposium was held with the aim of bringing together oncology specialists from eight countries and regions in Asia to present the status in their own national context and discuss the key challenges and requirements in order to establish a greater Asian presence in the area of cancer control and research. The task of bringing together diverse countries and regions is made all the more urgent in that while Asia now accounts for more than half of all new cancer cases globally, clinical guidelines are based predominantly on practices adopted in Western countries, which may not be optimized for unique ethnic, pharmacogenomic and cultural characteristics in Asia. Recognizing the need for Asia to better gather information and data for the compilation of Asia-specific clinical guidelines, the participants discussed the current status in Asia in the national and regional contexts and identified future steps towards integrated and collaborative initiatives in Asia. A key outcome of the symposium was a proposal to combine and integrate the activities of existing pan-Asian societies, including the Asian Pacific Federation of Organizations for Cancer Research and Control (APFOCC) and Asian Clinical Oncology Society (ACOS). Further proposals included the expansion of pan-Asian society membership to include individuals and the essential need to encourage the participation of young researchers in order to ensure self-sustainability of cancer control efforts in the future.

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Original Articles
Real-Life Experience of Sorafenib Treatment for Hepatocellular Carcinoma in Korea: From GIDEON Data
Do Young Kim, Hye Jin Kim, Kwang-Hyub Han, Sang Young Han, Jeong Heo, Hyun Young Woo, Soon Ho Um, Yeul Hong Kim, Young Oh Kweon, Ho Yeong Lim, Jung Hwan Yoon, Wan Sik Lee, Byung Seok Lee, Han Chu Lee, Baek-Yeol Ryoo, Seung Kew Yoon
Cancer Res Treat. 2016;48(4):1243-1252.   Published online February 24, 2016
DOI: https://doi.org/10.4143/crt.2015.278
AbstractAbstract PDFPubReaderePub
Purpose
The purpose of this study is to report real life experiences of sorafenib therapy for hepatocellular carcinoma (HCC) in Korea, using a subset of data from GIDEON (Global Investigation of Therapeutic Decisions in HCC and of Its Treatment with Sorafenib; a large, prospective, observational study).
Materials and Methods
Between January 2009 and April 2012, a total of 497 patients were enrolled from 11 sites in Korea. Of these, 482 patients were evaluable for safety analyses. Case report forms of paper or electronic version were used to record safety and efficacy data from all patients.
Results
More patients of Child-Pugh A received sorafenib for > 8 weeks than did patients of Child-Pugh B (55.5% vs. 34.3%). Child-Pugh score did not appear to influence the starting dose of sorafenib, and approximately 70% of patients both in Child-Pugh A and B groups received the recommended initial daily dose of 800 mg (69.0% and 69.5%, respectively). The median overall survival (OS) and time to progression (TTP) were 8.5 months and 2.5 months. In Child-Pugh A patients, the median OS and TTP were 10.2 months and 2.5 months. The most frequent treatment-emergent drug-related adverse event was hand-foot skin reaction (31.7%), followed by diarrhea (18.0%). The incidence of treatment-emergent adverse events was similar in both Child-Pugh A (85.4%) and Child-Pugh B (84.8%) patients.
Conclusion
Sorafenib was well tolerated by Korean HCC patients in clinical settings, and the safety profile did not appear to differ by Child-Pugh status. Survival benefit in Korean patients was in line with that of a previous pivotal phase III trial (SHARP).

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Caveolin-1 Modulates Docetaxel-Induced Cell Death in Breast Cancer Cell Subtypes through Different Mechanisms
Jinho Kang, Joo Hee Park, Hye Jin Lee, Ukhyun Jo, Jong Kuk Park, Jae Hong Seo, Yeul Hong Kim, Insun Kim, Kyong Hwa Park
Cancer Res Treat. 2016;48(2):715-726.   Published online September 21, 2015
DOI: https://doi.org/10.4143/crt.2015.227
Correction in: Cancer Res Treat 2019;51(3):1257
AbstractAbstract PDFPubReaderePub
Purpose
Caveolin-1 (CAV-1) expression is more associated with basal-like cancers than estrogen receptor- or ErbB-2–expressing breast cancers. However, the biological relevance of different levels of CAV-1 expression according to subtype in the epithelial compartment of breast cancer remains unclear.
Materials and Methods
We investigated whether CAV-1 functions as a tumor suppressor and/or modulator of the cytotoxic activity of docetaxel (DTX) in subtypes of breast cancer using in vitro and xenograft models.
Results
The levels of CAV-1 expression were closely associated with DTX sensitivity in triple-negative breast cancer cells. In addition, CAV-1 significantly inhibited cell proliferation and modulated DTX-induced apoptosis through cell cycle arrest in the G2/M phase. The mechanisms underlying DTX-induced apoptosis differed in breast cancers according to the levels of CAV- 1 expression. DTX robustly enhanced Bcl-2 inactivation by CAV-1 in MDA-MB-231 cells, while p53-mediated cell cycle arrest by DTX was more pronounced in CAV-1–low but p53-functional MCF-7 cells. In parallel with the data from breast cancer cell lines, CAV-1–transfected MCF-7 cells showed higher efficacy of DTX treatment in a xenograft model.
Conclusion
We clearly demonstrated cooperative effects between CAV-1 and DTX in mediating apoptosis, suggesting that the levels of CAV-1 expression might be an important indicator for DTX use in breast cancer.

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Can Serum be Used for Analyzing the KRAS Mutation Status in Patients with Advanced Colorectal Cancer?
Seung Tae Kim, Won Jin Chang, Lihua Jin, Jae Sook Sung, Yun Ji Choi, Yeul Hong Kim
Cancer Res Treat. 2015;47(4):796-803.   Published online January 30, 2015
DOI: https://doi.org/10.4143/crt.2014.106
AbstractAbstract PDFPubReaderePub
Purpose
KRAS mutations have been used widely as prognostic or predictive marker in patients with advanced colorectal cancer (CRC). However, it may be difficult to obtain a tumor tissue for analyzing the status of KRAS mutation in large proportion of patients with advanced disease.
Materials and Methods
We obtained pairs of tumor and serum samples from 65 patients with advanced CRC, between March 2008 and July 2011. KRAS mutation status from the tumor samples was analyzed by genomic polymerase chain reaction and direct sequence, and KRASmutation status from the serum samples was determined by a genomic polymerase chain reaction– restriction fragment length polymorphism assay.
Results
KRAS mutations were detected in the serum samples of 26 patients and in the tumor samples of 31 patients. KRAS mutation status in the serum and tumor samples was consistent in 44 of the 65 pairs (67.7%). There was a significant correlation between the mutations detected in the serum sample and the mutations detected in the matched tumor sample (correlation index, 0.35; p < 0.004). Twenty-two of the 57 patients (38.5%) received anti-epidermal growth factor receptor therapy as any line therapy. There was no significant difference in the overall survival (OS) in accordance to the status of KRASmutations in both the serum and tumor samples (p > 0.05). In a multivariate analysis, liver metastasis and no cytoreductive operation were independent prognostic factors for decreased OS.
Conclusion
The serum sample might alternatively be used when it is difficult to obtain tumor tissues for analyzing the status of KRAS mutation in patients with advanced CRC.

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Case Reports
Novel Germline Mutation of BRCA1 Gene in a 56-Year-Old Woman with Breast Cancer, Ovarian Cancer, and Diffuse Large B-Cell Lymphoma
Hye Sook Kim, Soon Wook Lee, Yoon Ji Choi, Sang Won Shin, Yeul Hong Kim, Min Sun Cho, Soon Nam Lee, Kyong Hwa Park
Cancer Res Treat. 2015;47(3):534-538.   Published online October 17, 2014
DOI: https://doi.org/10.4143/crt.2013.151
AbstractAbstract PDFPubReaderePub
We report a case of a 56-year-old woman with breast cancer, ovarian cancer, and diffuse large B-cell lymphoma with a BRCA1 gene mutation. Evidence is mounting that there is a large increase in the risk for hematologic malignancies among patients with genetic changes in the BRCA pathways. The genomic analysis demonstrated a frameshift mutation in the BRCA1 gene: 277_279delinsCC (Phe93fs). It is a novel BRCA1 mutation that has never been reported, and caused malignant lymphoma as well as breast and ovarian cancer.

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Bladder and Liver Involvement of Visceral Larva Migrans May Mimic Malignancy
Eun Joo Kang, Yoon Ji Choi, Jung Sun Kim, Byung Hyun Lee, Ka-Won Kang, Hong Jun Kim, Eun Sang Yu, Yeul Hong Kim
Cancer Res Treat. 2014;46(4):419-424.   Published online July 18, 2014
DOI: https://doi.org/10.4143/crt.2013.104
AbstractAbstract PDFPubReaderePub
Visceral larva migrans (VLM) syndrome is a clinical manifestation of systemic organ involvement by Toxocara species. VLM with involvement of the bladder and liver is a rare finding. A 62-year-old woman presented with diffuse bladder wall thickening and multiple liver masses with peripheral eosinophilia and urinary symptoms. We considered malignancy or eosinophilic cystitis through clinical manifestations and imaging findings. However, no suspicious malignant lesions were observed on cystoscopy and liver mass biopsy revealed the presence of eosinophilic necrotizing granuloma without malignant cells. Anti-Toxocara antibodies were detected by western blotting and the patient was diagnosed with VLM syndrome. After taking prednisolone, urinary symptoms disappeared. On abdominal CT scan taken after three months, the size of multiple liver masses and bladder wall thickening had decreased. VLM syndrome should be suspected in patients with an atypical imaging pattern and peripheral eosinophilia.

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    Miju Cheon, Jang Yoo
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    Yotaro Uchida, Keiji Yokoyama, Tomotaka Higashi, Takanori Kitaguchi, Hiromi Fukuda, Ryo Yamauchi, Naoaki Tsuchiya, Atsushi Fukunaga, Kaoru Umeda, Kazuhide Takata, Takashi Tanaka, Yasuaki Takeyama, Satoshi Shakado, Shotaro Sakisaka, Hiroyuki Hayashi, Yoshi
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Original Articles
Modified MVAC as a Second-Line Treatment for Patients with Metastatic Urothelial Carcinoma after Failure of Gemcitabine and Cisplatin Treatment
Jung Hyun Lee, Sung Gu Kang, Seung Tae Kim, Seok Ho Kang, In Keun Choi, Young Je Park, Sang Chul Oh, Deuk Jae Sung, Jae Hong Seo, Jun Cheon, Sang Won Shin, Yeul Hong Kim, Jun Suk Kim, Kyong Hwa Park
Cancer Res Treat. 2014;46(2):172-177.   Published online April 15, 2014
DOI: https://doi.org/10.4143/crt.2014.46.2.172
AbstractAbstract PDFPubReaderePub
Purpose

There is no established standard second-line chemotherapy for patients with advanced or metastatic urothelial carcinoma (UC) who failed gemcitabine and cisplatin (GC) chemotherapy. This study was conducted in order to investigate the efficacy and toxicity of modified methotrexate, vinblastine, doxorubicin, and cisplatin (MVAC) in patients with metastatic UC previously treated with GC.

Materials and Methods

We retrospectively analyzed 28 patients who received modified MVAC between November 2004 and November 2012. All patients failed prior, first-line GC chemotherapy.

Results

The median age of patients was 64.0 years (range, 33.0 to 77.0 years), and 23 (82.1%) patients had an Eastern Cooperative Oncology Group performance status of 0 or 1. The overall response rate and the disease control rate were 36.0% and 64.0%, respectively. After a median follow-up period of 38 weeks (range, 5 to 182 weeks), median progression free survival was 21.0 weeks (95% confidence interval [CI], 6.3 to 35.7 weeks) and median overall survival was 49.0 weeks (95% CI, 18.8 to 79.3 weeks). Grade 3 or 4 hematological toxicities included neutropenia (n=21, 75.0%) and anemia (n=9, 32.1%). Grade 3 or 4 non-hematological toxicities did not occur and there was no treatment-related death.

Conclusion

Modified MVAC appears to be a safe and active chemotherapy regimen in patients with stable physical status and adequate renal function after GC treatment.

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Dose KRAS Mutation Status Affect on the Effect of VEGF Therapy in Metastatic Colon Cancer Patients?
Seung Tae Kim, Kyong Hwa Park, Sang Won Shin, Yeul Hong Kim
Cancer Res Treat. 2014;46(1):48-54.   Published online January 15, 2014
DOI: https://doi.org/10.4143/crt.2014.46.1.48
AbstractAbstract PDFPubReaderePub
PURPOSE
Mutations affecting the KRAS gene are an established negative predictor for anti-epidermal growth factor receptor (anti-EGFR) therapies in metastatic colorectal cancer (CRC). However, the role of KRAS mutation as a biomarker for anti-vascular endothelial growth factor (VEGF) remains controversial.
MATERIALS AND METHODS
We analyzed retrospective data from 32 CRC patients who were available for KRAS mutation status and received cytotoxic chemotherapy plus bevacizumab as a first-line therapy. Six of 32 patients received anti-EGFR therapies. We used KRAS mutation status as a predictive or prognostic factor in CRC patients receiving bevacizumab.
RESULTS
We observed mutations in KRAS in 59.4% of patients. Bevacizumab was used in combination with oxaliplatin based regimens. There was no significant difference for progression free survival (PFS) and overall survival (OS) in patients with oxaliplatin based cytotoxic chemotherapy plus bevacizumab according to the status of KRAS mutation. After first-line therapy, 28 patients (87.5%) received second-line therapy. In univariate analysis, KRAS mutations did not have a major prognostic value for PFS (hazard ratio, 1.007; 95% confidence interval [CI], 0.469 to 2.162; p>0.05) or OS (hazard ratio, 0.548; 95% CI, 0.226 to 1.328; p>0.05). In addition, anti-EGFR therapies did not affect the impact on OS.
CONCLUSION
KRAS mutation is neither a predictive for bevacizumab nor a prognostic for OS in CRC patients receiving anti-VEGF therapy.

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A Randomized Double-Blind, Double-Dummy, Multicenter Trial of Azasetron versus Ondansetron to Evaluate Efficacy and Safety in the Prevention of Delayed Nausea and Vomiting Induced by Chemotherapy
Hee Yeon Lee, Hoon-Kyo Kim, Kyung Hee Lee, Bong-Seog Kim, Hong Suk Song, Sung Hyun Yang, Joon Hee Kim, Yeul Hong Kim, Jong Gwang Kim, Sang-We Kim, Dong-Wan Kim, Si-Young Kim, Hee Sook Park
Cancer Res Treat. 2014;46(1):19-26.   Published online January 15, 2014
DOI: https://doi.org/10.4143/crt.2014.46.1.19
AbstractAbstract PDFPubReaderePub
PURPOSE
This study was conducted to evaluate the efficacy and safety of azasetron compared to ondansetron in the prevention of delayed chemotherapy-induced nausea and vomiting.
MATERIALS AND METHODS
This study was a multi-center, prospective, randomized, double-dummy, double-blind and parallel-group trial involving 12 institutions in Korea between May 2005 and December 2005. A total of 265 patients with moderately and highly emetogenic chemotherapy were included and randomly assigned to either the azasetron or ondansetron group. All patients received azasetron (10 mg intravenously) and dexamethasone (20 mg intravenously) on day 1 and dexamethasone (4 mg orally every 12 hours) on days 2-4. The azasetron group received azasetron (10 mg orally) with placebo of ondansetron (orally every 12 hours), and the ondansetron group received ondansetron (8 mg orally every 12 hours) with placebo of azasetron (orally) on days 2-6.
RESULTS
Over days 2-6, the effective ratio of complete response in the azasetron and ondansetron groups was 45% and 54.5%, respectively (95% confidence interval, -21.4 to 2.5%). Thus, the non-inferiority of azasetron compared with ondansetron in delayed chemotherapy-induced nausea and vomiting was not proven in the present study. All treatments were well tolerated and no unexpected drug-related adverse events were reported. The most common adverse events related to the treatment were constipation and hiccups, and there were no differences in the overall incidence of adverse events.
CONCLUSION
In the present study, azasetron showed inferiority in the control of delayed chemotherapy-induced nausea and vomiting compared with ondansetron whereas safety profiles were similar between the two groups.

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    Ayyar Porkodi, Deepak Gopal Shewade, Goud Alladi Charanraj
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RASSF1A Suppresses Cell Migration through Inactivation of HDAC6 and Increase of Acetylated alpha-Tubulin
Hae-Yun Jung, Jun Seok Jung, Young Mi Whang, Yeul Hong Kim
Cancer Res Treat. 2013;45(2):134-144.   Published online June 30, 2013
DOI: https://doi.org/10.4143/crt.2013.45.2.134
AbstractAbstract PDFPubReaderePub
PURPOSE
The RAS association domain family protein 1 (RASSF1) has been implicated in a tumor-suppressive function through the induction of acetylated alpha-tubulin and modulation of cell migration. However, the mechanisms of how RASSF1A is associated with acetylation of alpha-tubulin for controlling cell migration have not yet been elucidated. In this study, we found that RASSF1A regulated cell migration through the regulation of histon deacetylase 6 (HDAC6), which functions as a tubulin deacetylase.
MATERIALS AND METHODS
The cell migration was assessed using wound-healing and transwell assays. The role of RASSF1A on cell migration was examined by immunofluorescence staining, HDAC activity assay and western blot analysis.
RESULTS
Cell migration was inhibited and cell morphology was changed in RASSF1A-transfected H1299 cells, compared with controls, whereas HDAC6 protein expression was not changed by RASSF1A transfection in these cells. However, RASSF1A inhibited deacetylating activity of HDAC6 protein and induced acetylated alpha-tubulin expression. Furthermore, acetylated alpha-tubulin and HDAC6 protein were co-localized in the cytoplasm in RASSF1A-transfected H1299 cells. Conversely, when the endogenous RASSF1A expression in HeLa cells was blocked with RASSF1A siRNA treatment, acetylated alpha-tubulin was co-localized with HDAC6 protein throughout the whole cells, including the nucleus, compared with scramble siRNA-treated HeLa cells. The restoration of RASSF1A by 5-Aza-dC treatment also induced acetylated alpha-tubulin through inhibition of HDAC6 activity that finally resulted in suppressing cell migration in H1299 cells. To further confirm the role of HDAC6 in RASSF1A-mediated cell migration, the HDAC6 expression in H1299 cells was suppressed by using HDAC6 siRNA, and cell motility was found to be decreased through enhanced acetylated alpha-tubulin.
CONCLUSION
The results of this study suggest that the inactivation of HDAC6 by RASSF1A regulates cell migration through increased acetylated alpha-tubulin protein.

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Impact of KRAS Mutation Status on Outcomes in Metastatic Colon Cancer Patients without Anti-Epidermal Growth Factor Receptor Therapy
Seung Tae Kim, Kyong Hwa Park, Jun Suk Kim, Sang Won Shin, Yeul Hong Kim
Cancer Res Treat. 2013;45(1):55-62.   Published online March 31, 2013
DOI: https://doi.org/10.4143/crt.2013.45.1.55
AbstractAbstract PDFPubReaderePub
PURPOSE
Activating mutation of the KRAS oncogene is an established negative predictor for anti-epidermal growth factor receptor (anti-EGFR) therapies in metastatic colorectal cancer (CRC). However, KRAS mutation as a prognostic factor of survival outcome remains controversial in CRC, independent of anti-EGFR therapies.
MATERIALS AND METHODS
We conducted a retrospective analysis of 103 CRC patients who were available for evaluation of KRAS mutation status. None of the patients analyzed had received anti-EGFR therapies. The role of KRAS mutation status was evaluated as a predictive factor for oxaliplatin or irinotecan and as a prognostic factor in CRC patients who did not receive anti-EGFR therapies.
RESULTS
Mutations in KRAS were observed in 48.5% of patients. The response for oxaliplatin- (p=0.664) and irinotecan-based (p=0.255) cytotoxic chemotherapy did not differ according to the KRAS mutation status. In addition, no significant difference in progression free survival (PFS; oxaliplatin, p=0.583 and irinotecan, p=0.426) and overall survival (OS; p=0.258) was observed between the wild and mutant type of the KRAS gene. In univariate and multivariate analyses, KRAS mutations did not have a major prognostic value regarding PFS (oxaliplatin: hazard ratio, 0.892; 95% confidence interval [CI], 0.590 to 1.347; p=0.586 and irinotecan: hazard ratio, 0.831; 95% CI, 0.524 to 1.319; p=0.433) or OS (hazard ratio, 0.754; 95% CI, 0.460 to 1.236; p=0.263). In addition, anti-vascular endothelial growth factor therapies did not affect PFS to oxaliplatin or irinotecan and OS.
CONCLUSION
KRAS mutation is not a prognostic marker for PFS to oxaliplatin or irinotecan and OS in CRC patients who did not receive anti-EGFR therapies.

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The Blocking of c-Met Signaling Induces Apoptosis through the Increase of p53 Protein in Lung Cancer
Hae-Yun Jung, Hyun-Jung Joo, Jong Kuk Park, Yeul Hong Kim
Cancer Res Treat. 2012;44(4):251-261.   Published online December 31, 2012
DOI: https://doi.org/10.4143/crt.2012.44.4.251
AbstractAbstract PDFPubReaderePub
PURPOSE
c-Met is an attractive potential target for novel therapeutic inhibition of human cancer, and c-Met tyrosine kinase inhibitors (TKIs) are effective growth inhibitors of various malignancies. However, their mechanisms in anticancer effects are not clear. In the present study, we investigated the possibility that blocking c-Met signaling induces p53-mediated growth inhibition in lung cancer.
MATERIALS AND METHODS
The growth inhibitory effects of c-Met TKI (SU11274) on lung cancer cells and a xenograft model were assessed using the MTT assay, flow cytometry, and terminal deoxyribonucleotide transferase-mediated nick-end labeling staining. The role of p53 protein in the sensitivity of c-Met TKI (SU11274) was examined by Western blot analysis and immunohistochemistry.
RESULTS
SU11274 significantly induced apoptosis in A549 cells with wild-type p53, compared with that in Calu-1 cells with null-type p53. SU11274 increased p53 protein by enhancing the stability of p53 protein. Increased p53 protein by SU11274 induced up-regulation of Bax and PUMA expression and down-regulation of Bcl-2 expression, subsequently activating caspase 3. In p53 knock-out and knock-in systems, we confirmed that SU11274 caused apoptosis through the p53-mediated apoptotic pathway. Likewise, in the A549 xenograft model, SU11274 effectively shrank tumor volume and induced apoptosis via increased p53 protein expression. Blocking c-Met signaling increased the level of p53 protein.
CONCLUSION
Our finding suggested that p53 plays an important role in SU11274-induced apoptosis, and p53 status seems to be related to the sensitivity to SU11274 in lung cancer.

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Chemotherapy in Patients Older than or Equal to 75 Years with Advanced Non-small Cell Lung Cancer
Seung Tae Kim, Kyong Hwa Park, Sang Cheul Oh, Jae Hong Seo, Jun Suk Kim, Yeul Hong Kim, Sang Won Shin
Cancer Res Treat. 2012;44(1):37-42.   Published online March 31, 2012
DOI: https://doi.org/10.4143/crt.2012.44.1.37
AbstractAbstract PDFPubReaderePub
PURPOSE
As the number of elderly patients diagnosed with non-small cell lung carcinoma (NSCLC) increases, the number of these patients receiving chemotherapy also increases. However, limited data exists regarding the use of chemotherapy in advanced NSCLC patients who are 75 years of age or older.
MATERIALS AND METHODS
Between May 2002 and October 2008, data for 48 advanced NSCLC patients who were 75 years of age or older who had been treated with chemotherapy were retrospectively analyzed.
RESULTS
The median age of study participants at the time of first line chemotherapy was 76 years (range, 75 to 87 years) and their median Charlson comorbidity index was 2 (range, 1 to 4). Of the total 48 patients, 43 patients (90%) were treated by platinum-based doublet as a first line chemotherapy regimen. Median progression free survival for first line chemotherapy was 5.7 months (95% confidence interval [CI], 4.93 to 6.47 months) with an overall response rate of 33.3%. After first line chemotherapy, only 14 of the 48 patients (29.2%) received second line chemotherapy. The median overall survival (OS) for these patients was 8.2 months (95% CI, 4.44 to 11.96 months). Multivariate analysis results indicated that female gender and having received second-line or more chemotherapy were independent prognostic factors for increased OS for all 48 patients. Charlson Index was not a significant independent prognostic factor for survival. There were 9 treatment related deaths due to infectious causes (18.8%).
CONCLUSION
Patients 75 years of age or older with advanced NSCLC may obtain clinical benefit from the administration of platinum-based doublet or single agent chemotherapy. However, oncologists must consider the aspect of safety in relation to the clinical benefits when managing this patient group.

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  • A phase II trial of Cremorphor EL-free paclitaxel (Genexol-PM) and gemcitabine in patients with advanced non-small cell lung cancer
    Hee Kyung Ahn, Minkyu Jung, Sun Jin Sym, Dong Bok Shin, Shin Myung Kang, Sun Young Kyung, Jeong-Woong Park, Sung Hwan Jeong, Eun Kyung Cho
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    M. Früh, H. Besrour, S. Gillessen, M. Joerger, F. Hitz, A. Savidan, T. Cerny, S. Ess
    Chemotherapy.2013; 59(1): 42.     CrossRef
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An Association Study of Polymorphisms in JAK3 Gene with Lung Cancer in the Korean Population
Wonbeak Yoo, Hae-Yun Jung, Seungjoon Lim, Jae Sook Sung, Kyong Hwa Park, Jeong Seon Ryu, Sang Won Shin, Jun Suk Kim, Jae Hong Seo, Yeul Hong Kim
Cancer Res Treat. 2011;43(2):108-116.   Published online June 30, 2011
DOI: https://doi.org/10.4143/crt.2011.43.2.108
AbstractAbstract PDFPubReaderePub
PURPOSE
The genetic alteration of the janus kinases (JAKs), non-receptor tyrosine kinase, is related to the development of human cancers. However, little is known about how the sequence variation of JAK3 contributes to the development of lung cancer. This study investigated whether polymorphisms at the promoter region of the JAK3 gene are associated with the risk of lung cancer in the Korean population.
MATERIALS AND METHODS
A total of 819 subjects, including 409 lung cancer patients and 410 healthy controls were recruited. The SNaPshot assay and polymerase chain reaction-restriction fragment length polymorphism analysis were used, and logistic regression analyses were performed to characterize the association between polymorphisms of JAK3 and lung cancer risk.
RESULTS
Three polymorphisms (-672 G>A, +64 A>G and +227 G>A) of JAK3 were analyzed for large-scale genotyping (n=819). Statistical analyses revealed that polymorphisms and haplotypes in the JAK3 gene were not significantly associated with lung cancer.
CONCLUSION
JAK3 gene was not significantly associated with the risk of lung cancer in the Korean population.

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  • Association Analysis of Polymorphic Gene Variants in the JAK/STAT Signaling Pathway with Aging and Longevity
    V. V. Erdman, T. R. Nasibullin, I. A. Tuktarova, R. Sh. Somova, O. E. Mustafina
    Russian Journal of Genetics.2019; 55(6): 728.     CrossRef
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No Association between Promoter Polymorphism of STK11 Gene and Lung Cancer Risk in the Korean Population
Jae Sook Sung, Young Mi Whang, Kyong Hwa Park, Jeong-Seon Ryu, Jong Gwon Choi, Jae Hong Seo, Sang Won Shin, Jun Suk Kim, Yeul Hong Kim
Cancer Res Treat. 2009;41(4):211-217.   Published online December 31, 2009
DOI: https://doi.org/10.4143/crt.2009.41.4.211
AbstractAbstract PDFPubReaderePub
Purpose

Serine-threonine kinase11 (STK11) was originally identified in 1997 as the causative mutation that's responsible for Peutz-Jeghers Syndrome (PJS). Several recent studies have reported that the STK11 gene is an important human tumor suppressor gene in lung cancer. We evaluated the associations between the polymorphisms of the STK11 promoter region and the risk of lung cancer in 901 Koreans.

Materials and Methods

By direct sequencing, we first discovered three novel polymorphisms (-1,795 T>C, -981 C>T and -160 G>T) and four known polymorphisms (-1,580 C>T, -1,494 A>C, -881 A>G and -458 G>C) of the STK11 promoter region in 24 blood samples of 24 Korean lung cancer patients. Further genotype analyses were then performed on 443 lung cancer patients and 458 controls.

Results

We discovered three novel polymorphisms and we identified four known polymorphisms of the STK11 promoter region in a Korean population. Statistical analyses revealed that the genotypes and haplotypes in the STK11 gene were not significantly associated with the risk of lung cancer in a Korean population.

Conclusion

This is the first study that's focused on the association of STK11 promoter polymorphisms and the risk of lung cancer in a Korean population. To evaluate the role of the STK11 gene for the risk of lung cancer, the genotypes of the STK11 promoter region (-1,795 T>C, -1,494 A>C and -160 G>T) were determined in 901 Koreans, yet the result revealed no significant difference between the lung cancer patients and the controls. These results suggest that the three promoter polymorphisms we studied are not important risk factors for the susceptibility to lung cancer in Koreans.

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    Se-Lyun Yoon, Yun-Gil Roh, In-Sun Chu, Jeonghoon Heo, Seung Il Kim, Heekyung Chang, Tae-Hong Kang, Jin Woong Chung, Sang Seok Koh, Vladimir Larionov, Sun-Hee Leem
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    Ningning He, Nayoung Kim, Mee Song, Choa Park, Somin Kim, Eun Young Park, Hwa Young Yim, Kyunga Kim, Jong Hoon Park, Keun Il Kim, Fan Zhang, Gordon B. Mills, Sukjoon Yoon
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    Jie Chou, Nan Du, Tina Ou, Pierre N. Floriano, Nicolaos Christodoulides, John T. McDevitt
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    Jae Sook Sung, Kyong Hwa Park, Seung Tae Kim, Yeul Hong Kim
    Genomics & Informatics.2012; 10(3): 167.     CrossRef
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Association of Single Nucleotide Polymorphisms in PIM-1 Gene with the Risk of Korean Lung Cancer
Dae Sik Kim, Jae Sook Sung, Eun Soon Shin, Jeong-Seon Ryu, In Keun Choi, Kyong Hwa Park, Yong Park, Eui Bae Kim, Seh Jong Park, Yeul Hong Kim
Cancer Res Treat. 2008;40(4):190-196.   Published online December 31, 2008
DOI: https://doi.org/10.4143/crt.2008.40.4.190
AbstractAbstract PDFPubReaderePub
Purpose

The expression of the PIM-1 gene, which is a proto-oncogene that encodes a serine/threonine kinase, is associated with multiple cellular functions such as proliferation, differentiation, apoptosis and tumorigenesis. In particular, several studies have reported that the PIM-1 gene is associated with the development of lymphoma, leukemia and prostate cancer. Therefore, this study was conducted to evaluate the association between the single nucleotide polymorphisms in the PIM-1 gene and the risk of lung cancer occurrence in the Korean population.

Materials and Methods

To evaluate the role of the PIM-1 gene in the development of lung cancer, the genotypes of the PIM-1 gene were determined in 408 lung cancer patients and 410 normal subjects.

Results

We found that the T-C-T-C haplotypes of the PIM-1 gene (-1196 T>C, IVS4 +55 T>C, IVS4 +1416 T>A and +3684 C>A) were associated with an increased risk of lung cancer [adjusted odds ratio (aOR): 3.98; 95% CI: 1.24~12.75, p-value: 0.020]. In particular, these haplotypes showed an increased risk of lung cancer in males (aOR: 5.67; 95% CI: 1.32~24.30, p-value: 0.019) and smokers (aOR: 7.82; 95% CI: 1.75~34.98, p-value: 0.007).

Conclusions

The present results suggest that the T-C-T-C haplotype of the PIM-1 gene could influence the risk of developing smoking-related lung cancer in the Korean population. Additional functional studies with an larger sample sized analysis are warranted to reconfirm our findings.

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  • A review on structure-function mechanism and signaling pathway of serine/threonine protein PIM kinases as a therapeutic target
    Ajaya Kumar Rout, Budheswar Dehury, Satya Narayan Parida, Sushree Swati Rout, Rajkumar Jena, Neha Kaushik, Nagendra Kumar Kaushik, Sukanta Kumar Pradhan, Chita Ranjan Sahoo, Ashok Kumar Singh, Meenakshi Arya, Bijay Kumar Behera
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    Shujuan Yan, Meng Wang
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    Jae-Sook Sung, Kyong-Hwa Park, Seung-Tae Kim, Jae-Hong Seo, Sang-Won Shin, Jun-Suk Kim, Yeul-Hong Kim
    Genomics & Informatics.2010; 8(4): 194.     CrossRef
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Clinical Factors Related to Suspected Second Primary Lung Cancer Development in Patients with Head and Neck Cancer
Eui Bae Kim, Yong Park, Seh Jong Park, Dae Sik Kim, Jee Won Kim, Hee Yun Seo, Hwa Jung Sung, In Keun Choi, Kyong Hwa Park, Sang Cheul Oh, Chul Won Choi, Byung Soo Kim, Yeul Hong Kim, Jun Suk Kim, Sang Won Shin, Chul Yong Kim, Kwang-Yoon Jung
Cancer Res Treat. 2008;40(4):178-183.   Published online December 31, 2008
DOI: https://doi.org/10.4143/crt.2008.40.4.178
AbstractAbstract PDFPubReaderePub
Purpose

The rate of second primary lung cancer development for patients with head and neck cancer (HNC) has been noted. The aim of our study was to evaluate the incidence and clinical features of suspected second primary lung cancer that developed in patients with primary HNC.

Materials and Methods

We conducted a retrospective study of 469 patients who were newly diagnosed with HNC at the Korea University Medical Center between January 2000 and December 2006.

Results

A total of 469 patients were included (389 men and 80 women). Eighteen patients (3.8%) had suspected second primary lung cancers. Statistically significant clinical variables for lung cancer development included the origin site for the primary HNC (oro-hypopharynx and larynx) (p=0.048), abnormal chest x-ray findings (p=0.027) and the histological HNC type (squamous cell carcinoma) (p=0.032). When the second primary lung cancers were combined with HNCs, the adjusted overall survival of patients with a second primary lung cancer was 16 months (p<0.001).

Conclusions

Considering the relative risk factors for a second primary lung cancer developing in patients with HNC, advanced diagnostic tools, such as chest CT or PET CT scan, should be applied for the early detection of a second primary lung cancer.

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    Yusra F. Shao, Seongho Kim, John D. Cramer, Dina Farhat, Jeffrey Hotaling, Syed Naweed Raza, George Yoo, Ho‐sheng Lin, Harold Kim, Ammar Sukari, Misako Nagasaka
    Head & Neck.2022; 44(10): 2069.     CrossRef
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    Pablo Rosado, Soledad Fernández, Luis Junquera, Juan Carlos De Vicente
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The Bone Morphogenesis Protein-2 (BMP-2) is Associated with Progression to Metastatic Disease in Gastric Cancer
Yong Park, Jee Won Kim, Dae Sik Kim, Eui Bae Kim, Se Jong Park, Jin Yong Park, Woo Suk Choi, Jong Gyu Song, Hee Yun Seo, Sang Cheul Oh, Byung Soo Kim, Jong Jae Park, Yeul Hong Kim, Jun Suk Kim
Cancer Res Treat. 2008;40(3):127-132.   Published online September 30, 2008
DOI: https://doi.org/10.4143/crt.2008.40.3.127
AbstractAbstract PDFPubReaderePub
Purpose

Bone Morphogenetic Proteins (BMPs) are members of the TGF-β superfamily and it has been demonstrated that BMPs enhance migration, invasion and metastasis. The purpose of this study was to identify the association between the serum BMP-2 level and the progression status of gastric cancer.

Materials and Methods

Fifty-five patients with metastatic gastric cancer (metastatic disease group), six patients with early gastric cancer without lymph node metastasis (the EGC group), and ten healthy control subjects were enrolled in this study. The serum BMP-2 level was quantified by use of a commercially available ELISA kit. In EGC group patients and patients with metastatic disease, whole blood was obtained before endoscopic mucosal resection and before the commencement of a scheduled cycle of systemic chemotherapy, respectively.

Results

No significant difference in the mean serum BMP-2 levels was observed between the control subjects and the EGC group patients (87.95 pg/ml for the control subjects and 84.50 pg/ml for the EGC group, p=1.0). However, the metastatic disease group patients had a significantly higher level of serum BMP (179.61 pg/ml) than the control subjects and EGC group patients (87.95 pg/ml for the control subjects and 84.50 pg/ml for the EGC group, p<0.0001). Moreover, the mean serum BMP-2 level from patients with a bone metastasis was significantly higher than the mean serum BMP-2 level from patients without a bone metastasis (204.73 pg/ml versus 173.33 pg/ml, p=0.021).

Conclusions

BMP-2 seems to have a role in progression to metastatic disease in gastric cancer, especially in the late stage of tumorigenesis, including invasion and metastasis. BMP-2 may facilitate bone metastasis in gastric cancer. To confirm these findings, further studies are required with tissue specimens and the use of a cancer cell line.

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    Yun-Jung Choi, Patrick N. Ingram, Kun Yang, Lan Coffman, Mangala Iyengar, Shoumei Bai, Dafydd G. Thomas, Euisik Yoon, Ronald J. Buckanovich
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Glucose Transporter-1 Expression in Squamous Cell Carcinoma of the Tongue
Yoon Seok Choi, Seok Jin Kim, Dae Sik Kim, Seh Jong Park, Yong Park, Hye Jin Shin, Kwang-Yoon Jung, Seung-Kuk Baek, Bong Kyung Shin, Jung Woo Choi, Byung Soo Kim, Sang Won Shin, Yeul Hong Kim, Jun Suk Kim
Cancer Res Treat. 2007;39(3):109-115.   Published online September 30, 2007
DOI: https://doi.org/10.4143/crt.2007.39.3.109
AbstractAbstract PDFPubReaderePub
Purpose

Tumor cells are known to express hypoxia-related proteins such as glucose transporter-1 (Glut-1). These hypoxia-induced changes may allow tumor cells to survive under sustained hypoxic microenvironments, and the surviving tumor cell under hypoxia may develop a more aggressive phenotype and so result in a poor prognosis.

Materials and Methods

The Glut-1 expression was analyzed by immunohistochemistry, and its association with the prognosis was assessed in 60 patients with squamous cell carcinoma of the tongue.

Results

The Glut-1 expression was diffuse with a membranous pattern, and the median percentage of Glut-1 positive tumor cells was 60% (range: 0.0~90.0%). A high Glut-1 expression (the percentage of positive tumor cells ≥ the median value, 60%) was associated with the location of primary lesion, lymph node metastasis status and disease stage (p<0.05). The expression of Glut-1 was correlated with the Ki-67 expression (r=0.406, p=0.001). Microvessel density, as represented by CD31 staining, was also correlated with the Glut-1 expression although its significance is weak (r=0.267, p=0.039). On the univariate analysis, the group with a high Glut-1 expression showed poorer overall survival than the group with a low Glut-1 expression (p<0.05). However, the Glut-1 expression failed to show any independent prognostic significance on the multivariate analysis.

Conclusion

The expression of Glut-1 may be useful for predicting the prognosis and determining the treatment strategy for the management of squamous cell carcinoma of the tongue.

Citations

Citations to this article as recorded by  
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AKAP12α is Associated with Promoter Methylation in Lung Cancer
Ukhyun Jo, Young Mi Whang, Han Kyeom Kim, Yeul Hong Kim
Cancer Res Treat. 2006;38(3):144-151.   Published online June 30, 2006
DOI: https://doi.org/10.4143/crt.2006.38.3.144
AbstractAbstract PDFPubReaderePub
Purpose

Promoter methylation is an important mechanism for silencing tumor-suppressor genes in cancer and it is a promising tool for the development of molecular biomarkers. The purpose of the present study was to investigate whether inactivation of the A Kinase Anchoring Protein 12 (AKAP12) gene is assoCiated with promoter methylation in lung cancer.

Materials and Methods

The AKAP12 expression was examined by reverse transcription-polymerase chain reaction (RT-PCR) in ten lung cancer cell lines. The methylation status of the AKAP12α promoter was analyzed by performing bisulfite sequencing analysis in ten lung cancer cell lines, twenty four lung tissues and matched normal tissues.

Results

The AKAP12α expression was reduced in 6 of 10 (60%) lung cancer cell lines, whereas the AKAP12β expression was absent in 1 of 10 (10%) lung cancer cell lines. The AKAP12α expression was restored after treatment with the demethylating agent 5-aza-2'-deoxycytidine in three lung cancer cell lines. Methylation of CpG island 1 in the AKAP12α promoter was detected in 30% of the lung cancer cell lines, whereas methylation of CpG island 2 in the AKAP12α promoter was observed in the immortalized bronchial cell line and in all the lung cancer cell lines. In lung tumors, the CpG island 1 in the AKAP12α promoter was infrequently methylated. However, CpG island 2 in the AKAP12α promoter was highly methylated in lung tumors compared with the surrounding normal tissues, and this was statistically significant (p=0.0001).

Conclusion

Our results suggest that inactivation of the AKAP12α expression is assoCiated with DNA methylation of the promoter region in lung cancer, and that AKAP12α may play an important role in lung cancer carcinogenesis.

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    Jeffrey W. Streb, Xiaochun Long, Ting-Hein Lee, Qiang Sun, Chad M. Kitchen, Mary A. Georger, Orazio J. Slivano, William S. Blaner, Daniel W. Carr, Irwin H. Gelman, Joseph M. Miano, Gian Paolo Fadini
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