Development and validation of a prognostic and predictive 32-gene signature for gastric cancer

Jae Ho Cheong, Sam C. Wang, Sunho Park, Matthew R. Porembka, Alana L. Christie, Hyunki Kim, Hyo Song Kim, Hong Zhu, Woo Jin Hyung, Sung Hoon Noh, Bo Hu, Changjin Hong, John D. Karalis, In Ho Kim, Sung Hak Lee, Tae Hyun Hwang

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


Genomic profiling can provide prognostic and predictive information to guide clinical care. Biomarkers that reliably predict patient response to chemotherapy and immune checkpoint inhibition in gastric cancer are lacking. In this retrospective analysis, we use our machine learning algorithm NTriPath to identify a gastric-cancer specific 32-gene signature. Using unsupervised clustering on expression levels of these 32 genes in tumors from 567 patients, we identify four molecular subtypes that are prognostic for survival. We then built a support vector machine with linear kernel to generate a risk score that is prognostic for five-year overall survival and validate the risk score using three independent datasets. We also find that the molecular subtypes predict response to adjuvant 5-fluorouracil and platinum therapy after gastrectomy and to immune checkpoint inhibitors in patients with metastatic or recurrent disease. In sum, we show that the 32-gene signature is a promising prognostic and predictive biomarker to guide the clinical care of gastric cancer patients and should be validated using large patient cohorts in a prospective manner.

Original languageEnglish
Article number774
JournalNature communications
Issue number1
Publication statusPublished - 2022 Dec

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Biochemistry,Genetics and Molecular Biology
  • General Physics and Astronomy


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