Modulation of p53 expression in cancer-associated fibroblasts prevents peritoneal metastasis of gastric cancer

Toshihiro Ogawa, Satoru Kikuchi, Motoyasu Tabuchi, Ema Mitsui, Yuta Une, Hiroshi Tazawa, Shinji Kuroda, Kazuhiro Noma, Toshiaki Ohara, Shunsuke Kagawa, Yasuo Urata, Toshiyoshi Fujiwara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Cancer-associated fibroblasts (CAFs) in the tumor microenvironment are associated with the establishment and progression of peritoneal metastasis. This study investigated the efficacy of replicative oncolytic adenovirus-mediated p53 gene therapy (OBP-702) against CAFs and peritoneal metastasis of gastric cancer (GC). Higher CAF expression in the primary tumor was associated with poor prognosis of GC, and higher CAF expression was also observed with peritoneal metastasis in immunohistochemical analysis of clinical samples. And, we found transcriptional alteration of p53 in CAFs relative to normal gastric fibroblasts (NGFs). CAFs increased the secretion of cancer-promoting cytokines, including interleukin-6, and gained resistance to chemotherapy relative to NGFs. OBP-702 showed cytotoxicity to both GC cells and CAFs but not to NGFs. Overexpression of wild-type p53 by OBP-702 infection caused apoptosis and autophagy of CAFs and decreased the secretion of cancer-promoting cytokines by CAFs. Combination therapy using intraperitoneal administration of OBP-702 and paclitaxel synergistically inhibited the tumor growth of peritoneal metastases and decreased CAFs in peritoneal metastases. OBP-702, a replicative oncolytic adenovirus-mediated p53 gene therapy, offers a promising biological therapeutic strategy for peritoneal metastasis, modulating CAFs in addition to achieving tumor lysis.

Original languageEnglish
Pages (from-to)249-261
Number of pages13
JournalMolecular Therapy - Oncolytics
Publication statusPublished - Jun 16 2022


  • adenovirus
  • cancer-associated fibroblast
  • gastric cancer
  • oncolytic virus
  • p53
  • paclitaxel
  • peritoneal metastasis

ASJC Scopus subject areas

  • Molecular Medicine
  • Oncology
  • Cancer Research
  • Pharmacology (medical)


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