Cancer Research and Treatment

Original Articles

Breast cancer

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 Res Treat. 2023;55(2):531-541. Published online September 7, 2022; DOI: https://doi.org/10.4143/crt.2022.221

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Purpose
Mutations in the PIK3CA gene occur frequently in breast cancer patients. Activating PIK3CA mutations confer resistance to human epidermal growth factor receptor 2 (HER2)-targeted treatments. In this study, we investigated whether PIK3CA mutations were correlated with treatment response or duration in patients with HER2-positive (HER2+) breast cancer.
Materials and Methods
We retrospectively reviewed the clinical information of patients with HER2+ breast cancer who received HER2-targeted therapy for early-stage or metastatic cancers. The pathologic complete response (pCR), progression-free survival (PFS), and overall survival were compared between patients with wild-type PIK3CA (PIK3CAw) and those with mutated PIK3CA (PIK3CAm). Next-generation sequencing was combined with examination of PFS associated with anti-HER2 monoclonal antibody (mAb) treatment.
Results
Data from 90 patients with HER2+ breast cancer were analyzed. Overall, 34 (37.8%) patients had pathogenic PIK3CA mutations. The pCR rate of the PIK3CAm group was lower than that of the PIK3CAw group among patients who received neoadjuvant chemotherapy for early-stage cancer. In the metastatic setting, the PIK3CAm group showed a significantly shorter mean PFS (mPFS) with first-line anti-HER2 mAb. The mPFS of second-line T-DM1 was lower in the PIK3CAm group than that in the PIK3CAw group. Sequencing revealed differences in the mutational landscape between PIK3CAm and PIK3CAw tumors.
Conclusion
Patients with HER2+ breast cancer with activating PIK3CA mutations had lower pCR rates and shorter PFS with palliative HER2-targeted therapy than those with wild-type PIK3CA. Precise targeted-therapy is needed to improve survival of patients with HER2+/PIK3CAm breast cancer.

Citations

Citations to this article as recorded by

Safety and efficacy of pyrotinib for HER‑2‑positive breast cancer in the neoadjuvant setting: A systematic review and meta‑analysis
Qian Ma, Bai Wei, Bi-Cheng Wang, Ganxin Wang, Xuan Zhou, Yan Wang
Oncology Letters.2024;[Epub] CrossRef
A novel PIK3CA hot-spot mutation in breast cancer patients detected by HRM-COLD-PCR analysis
Saoussen Debouki-Joudi, Wala Ben Kridis, Fatma Trifa, Wajdi Ayadi, Abdelmajid Khabir, Tahia Sellami-Boudawara, Jamel Daoud, Afef Khanfir, Raja Mokdad-Gargouri
Breast Disease.2024; 43(1): 213. CrossRef
Liquid Biopsy in the Clinical Management of Cancers
Ho-Yin Ho, Kei-See (Kasey) Chung, Chau-Ming Kan, Sze-Chuen (Cesar) Wong
International Journal of Molecular Sciences.2024; 25(16): 8594. CrossRef
Modeling the management of patients with human epidermal growth factor receptor 2-positive breast cancer with liquid biopsy: the future of precision medicine
Eleonora Nicolò, Caterina Gianni, Giuseppe Curigliano, Carolina Reduzzi, Massimo Cristofanilli
Current Opinion in Oncology.2024; 36(6): 503. CrossRef
Current progress in chimeric antigen receptor-modified T cells for the treatment of metastatic breast cancer
Li Yin, Gui-lai Chen, Zhuo Xiang, Yu-lin Liu, Xing-yu Li, Jing-wang Bi, Qiang Wang
Biomedicine & Pharmacotherapy.2023; 162: 114648. 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
Association of PIK3CA mutation with outcomes in HER2-positive breast cancer treated with anti-HER2 therapy: A meta-analysis and bioinformatic analysis of TCGA‑BRCA data
Haizhu Chen, Xingbin Hu, Daquan Wang, Ying Wang, Yunfang Yu, Herui Yao
Translational Oncology.2023; 37: 101738. CrossRef
Appraisal of Systemic Treatment Strategies in Early HER2-Positive Breast Cancer—A Literature Review
Danilo Giffoni de Mello Morais Mata, Rania Chehade, Malek B. Hannouf, Jacques Raphael, Phillip Blanchette, Abdullah Al-Humiqani, Monali Ray
Cancers.2023; 15(17): 4336. CrossRef
The clinical significance of HER2 expression in DCIS
Ioanna Akrida, Francesk Mulita
Medical Oncology.2022;[Epub] 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

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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

Citations to this article as recorded by

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

8,549 View
260 Download
5 Web of Science
4 Crossref

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