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NAMBARA SHO, MASUDA TAKAAKI, HIROSE KOSUKE, HU QINGJIANG, TOBO TARO, OZATO YUKI, KURASHIGE JUNJI, HIRAKI YOSHIKI, HISAMATSU YUICHI, IGUCHI TOMOHIRO, SUGIMACHI KEISHI, OKI EIJI, YOSHIZUMI TOMOHARU, MIMORI KOSHI. Rab27b, a Regulator of Exosome Secretion, Is Associated With Peritoneal Metastases in Gastric Cancer. Cancer Genomics Proteomics 2023; 20:30-39. [PMID: 36581340 PMCID: PMC9806673 DOI: 10.21873/cgp.20362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/02/2022] [Accepted: 10/05/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND/AIM Peritoneal metastasis (PM) of gastric cancer (GC) leads to poor clinical outcomes. Tumor-derived exosomes promote metastasis via communication between tumor cells and host cells. In this study, we investigated the effect of Rab27, which is required for exosome secretion, on the PM of GC. MATERIALS AND METHODS We established a stable knockdown of two Rab27 homologs, Rab27a and Rab27b, in human GC cells (58As9) with a high potential of PM. We examined the level of exosome secretion from Rab27-knockdown 58As9 cells by Western blotting and the ability of Rab27b knockdown to suppress PM in 58As9 cells using a mouse xenograft model. In vitro proliferation and invasion assays were performed in the Rab27b-knockdown cells. Next, Rab27b expression was evaluated in human GC tissues by immunohistochemistry. Finally, we assessed the clinicopathological and prognostic significance of Rab27b expression by RT-qPCR in both our and other TCGA datasets of GC. RESULTS Rab27a and Rab27b knockdown in 58As9 cells decreased the secretion of exosomes, characterized by the endocytic marker CD63. Rab27b knockdown decreased PM in vivo without affecting the in vitro proliferation or invasion ability of 58As9 cells. In human GC tissues, Rab27b was overexpressed in tumor cells. The overall and recurrence-free survival rates were significantly lower in GC patients with high compared to low Rab27b mRNA expression in our and other TCGA datasets. CONCLUSION Rab27b expression potentially serves as a poor prognostic biomarker, possibly affecting PM via exosome secretion from GC cells.
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Affiliation(s)
- SHO NAMBARA
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan,Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - TAKAAKI MASUDA
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - KOSUKE HIROSE
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - QINGJIANG HU
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan,Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - TARO TOBO
- Department of Clinical Laboratory Medicine, Kyushu University Beppu Hospital, Beppu, Japan
| | - YUKI OZATO
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - JUNJI KURASHIGE
- Department of Surgery, National Hospital Organization, Kumamoto Medical Center, Kumamoto, Japan
| | - YOSHIKI HIRAKI
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - YUICHI HISAMATSU
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
| | - TOMOHIRO IGUCHI
- Department of Surgery, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - KEISHI SUGIMACHI
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan,Department of Gastroenterological Surgery, National Kyushu Cancer Center, Fukuoka, Japan
| | - EIJI OKI
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - TOMOHARU YOSHIZUMI
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - KOSHI MIMORI
- Department of Surgery, Kyushu University Beppu Hospital, Beppu, Japan
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TODAKA AKIKO, NARA SATOSHI, MOTOI FUYUHIKO, MORINAGA SOICHIRO, TOSHIYAMA REISHI, HIGUCHI RYOTA, KONISHI MASARU, SHIRAKAWA HIROFUMI, TSUMURA HIDETAKA, OKUYAMA HIROYUKI, NAGANO HIROAKI, SHIOJI KAZUHIKO, SUGIMACHI KEISHI, ASAGI AKINORI, MIZUNO NOBUMASA, FURUSE JUNJI. Postoperative Treatment of Resectable Pancreatic Cancer With Positive Peritoneal Lavage Cytology: A Multicentre Retrospective Study. Anticancer Res 2022; 42:893-902. [DOI: 10.21873/anticanres.15547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 11/10/2022]
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YAMAMOTO M, BABA H, KUSUMOTO T, ENDO K, MAEHARA Y, SUGIMACHI K. DISSEMINATED INTRAVASCULAR COAGULATION IN A MAN WITH METACHRONOUS BONE METASTASIS FROM GASTRIC-CANCER - CASE-REPORT. Oncol Rep 1994; 1:877-9. [DOI: 10.3892/or.1.5.877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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BABA H, MAEHARA Y, TAKEUCHI H, INUTSUKA S, YAMAMOTO M, ENDO K, SUGIMACHI K. SYNERGISM OF CYTOTOXICITY BETWEEN CIS-DIAMINEDICHLORO-PLATINUM-(II) AND CIS-DIAMINE(1,1-CYCLOBUTANEDICARBOXYLATE)-PLATINUM-(II). Int J Oncol 1994. [DOI: 10.3892/ijo.4.2.329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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ISHIDA T, INOUE T, HAMATAKE M, KOHDONO S, FUKUYAMA Y, TATEISHI M, SUGIO K, SUGIMACHI K. NEOADJUVANT CHEMOTHERAPY IN PATIENTS WITH SMALL-CELL LUNG-CANCER - RADIOGRAPHIC AND CLINICOPATHOLOGICAL ANALYSIS. Int J Oncol 1994. [DOI: 10.3892/ijo.4.1.75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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KOHNOE S, MAEHARA Y, TAKAHASHI I, YOSHIDA M, EMI Y, BABA H, SUGIMACHI K. L-HISTIDINOL POTENTIATES HYPERTHERMIC CELL-KILLING IN-VITRO. Int J Oncol 1993. [DOI: 10.3892/ijo.3.5.835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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