Cancer Research and Treatment

Original Articles

Gastrointestinal cancer

Identification of New Pathogenic Variants of Hereditary Diffuse Gastric Cancer: Seung-Young Oh, Giyong Jang, Jaeryuk Kim, Kyoung-Yun Jeong, Hyun Myong Kim, Yoon Jin Kwak, Seong-Ho Kong, Do Joong Park, Hyuk-Joon Lee, Sung-Yup Cho, Jong-Il Kim, Han-Kwang Yang; Cancer Res Treat. 2024;56(4):1126-1135. Published online April 11, 2024; DOI: https://doi.org/10.4143/crt.2024.328

Purpose
Hereditary diffuse gastric cancer (HDGC) presents a significant genetic predisposition, notably linked to mutations in the CDH1 and CTNNA1. However, the genetic basis for over half of HDGC cases remains unidentified. The aim of this study is to identify novel pathogenic variants in HDGC and evaluate their protein expression.
Materials and Methods
Among 20 qualifying families, two were selected based on available pedigree and DNA. Whole genome sequencing (WGS) on DNA extracted from blood and whole exome sequencing on DNA from formalin-fixed paraffin-embedded tissues were performed to find potential pathogenic variants in HDGC. After selection of a candidate variant, functional validation, and enrichment analysis were performed.
Results
As a result of WGS, three candidate germline mutations (EPHA5, MCOA2, and RHOA) were identified in one family. After literature review and in-silico analyses, the RHOA mutation (R129W) was selected as a candidate. This mutation was found in two gastric cancer patients within the family. In functional validation, it showed RhoA overexpression and a higher GTP-bound state in the Rhoa^R129W mutant. Decreased phosphorylation at Ser127/397 suggested altered YAP1 regulation in the Rho-ROCK pathway. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses linked Rhoa^R129W overexpression to changed migration/adhesion in MKN1 cell line. However, this RHOA mutation (R129W) was not found in index patients in other families.
Conclusion
The RHOA mutation (R129W) emerges as a potential causative gene for HDGC, but only in one family, indicating a need for further studies to understand its role in HDGC pathogenesis fully.

Citations

Citations to this article as recorded by

Hereditary diffuse gastric cancer: the evolution of a cancer syndrome
Lyvianne Decourtye-Espiard, Tanis Godwin, Parry Guilford
Journal of the Royal Society of New Zealand.2025; 55(6): 2636. CrossRef
A Comprehensive Review of Genetic Mutations Occurring in the Development and Progression of Gastric Cancer
Yalan Li, Qianqian Xu, Zhuo Chen, Mengting Chen, Kunyu Han, Zhuqing Zhang, Aling Shen, Xiaoyan Fu
Digestive Diseases.2025; 43(6): 630. CrossRef
Helicobacter pylori infection status and evolution of gastric cancer
Wenlin Zhang, Yuxin Zhang, Jing Ning, Weiwei Fu, Shigang Ding
Chinese Medical Journal.2025; 138(23): 3083. CrossRef
Current advances and challenges in Managing Hereditary Diffuse Gastric Cancer (HDGC): a narrative review
L. van der Sluis, J.M. van Dieren, R.S. van der Post, T.M. Bisseling
Hereditary Cancer in Clinical Practice.2024;[Epub] CrossRef

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Prevalence and Risk Factors of Germline Pathogenic Variants in Pancreatic Ductal Adenocarcinoma: Kum Hei Ryu, Sunhwa Park, Jung Won Chun, Eunhae Cho, Jongmun Choi, Dong-Eun Lee, Hyoeun Shim, Yun-Hee Kim, Sung-Sik Han, Sang-Jae Park, Sang Myung Woo, Sun-Young Kong; Cancer Res Treat. 2023;55(4):1303-1312. Published online April 3, 2023; DOI: https://doi.org/10.4143/crt.2023.291

Abstract PDF Supplementary Material PubReader ePub

Purpose
The genetic attribution for pancreatic ductal adenocarcinoma (PDAC) has been reported as 5%-10%. However, the incidence of germline pathogenic variants (PVs) in Korean PDAC patients has not been thoroughly investigated. Therefore, we studied to identify the risk factors and prevalence of PV for future treatment strategies in PDAC.
Materials and Methods
Total of 300 (155 male) patients with a median age of 65 years (range, 33 to 90 years) were enrolled in National Cancer Center in Korea. Cancer predisposition genes, clinicopathologic characteristics, and family history of cancer were analyzed.
Results
PVs were detected in 20 patients (6.7%, median age 65) in ATM (n=7, 31.8%), BRCA1 (n=3, 13.6%), BRCA2 (n=3), and RAD51D (n=3). Each one patient showed TP53, PALB2, PMS2, RAD50, MSH3, and SPINK1 PV. Among them, two likely PVs were in ATM and RAD51D, respectively. Family history of various types of cancer including pancreatic cancer (n=4) were found in 12 patients. Three patients with ATM PVs and a patient with three germline PVs (BRCA2, MSH3, and RAD51D) had first-degree relatives with pancreatic cancer. Familial pancreatic cancer history and PVs detection had a significant association (4/20, 20% vs. 16/264, 5.7%; p=0.035).
Conclusion
Our study demonstrated that germline PVs in ATM, BRCA1, BRCA2, and RAD51D are most frequent in Korean PDAC patients and it is comparable to those of different ethnic groups. Although this study did not show guidelines for germline predisposition gene testing in patients with PDAC in Korea, it would be emphasized the need for germline testing for all PDAC patients.

Citations

Citations to this article as recorded by

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Xu Ding, Jinjun Shi, Zhengqing Lei, Guoqing Wang, Chenchun Fu, Xiangyu Su, Guangyu Zhu
Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease.2025; 1871(3): 167673. CrossRef
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Scenario of endometrial cancer in Asian countries: epidemiology, risk factors and challenges
Sayeeda Sultana, Rehana Parveen
International Journal Of Community Medicine And Public Health.2025; 12(6): 2921. CrossRef
MLH1 Inhibits Metastatic Potential of Pancreatic Ductal Adenocarcinoma via Downregulation of GPRC5C
Wen-Jing Liu, Jun Lu, Wei-Xun Zhou, Jian-Zhou Liu, Li Zhou
Laboratory Investigation.2024; 104(9): 102107. CrossRef
Clinical Significance of PALB2 Pathogenic Germline Variant
Min-Chae Kang, R.N., Jong Eun Park, Mi-Ae Jang, Dongju Won, Boyoung Park, Seeyoun Lee, Dong Ock Lee, Kum Hei Ryu, Yoon-Jung Chang, Sun-Young Kong
Laboratory Medicine Online.2024; 14(4): 311. CrossRef
Prevalence Estimation of the PALB2 Germline Variant in East Asians and Koreans through Population Database Analysis
Jong Eun Park, Min-Chae Kang, Taeheon Lee, Eun Hye Cho, Mi-Ae Jang, Dongju Won, Boyoung Park, Chang-Seok Ki, Sun-Young Kong
Cancers.2024; 16(19): 3318. CrossRef
Understanding the Genetic Landscape of Pancreatic Ductal Adenocarcinoma to Support Personalized Medicine: A Systematic Review
Antonino Pantaleo, Giovanna Forte, Candida Fasano, Martina Lepore Signorile, Paola Sanese, Katia De Marco, Elisabetta Di Nicola, Marialaura Latrofa, Valentina Grossi, Vittoria Disciglio, Cristiano Simone
Cancers.2023; 16(1): 56. CrossRef

6,979 View
281 Download
6 Web of Science
7 Crossref

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