Yukiko Niwa
   Department   School of Medicine(Yachiyo Medical Center), School of Medicine
   Position   Assistant Professor
Article types Original article
Language English
Peer review Peer reviewed
Title GPR155 Serves as a Predictive Biomarker for Hematogenous Metastasis in Patients with Gastric Cancer.
Journal Formal name：Scientific reports
Abbreviation：Sci Rep
ISSN code：20452322/20452322
Domestic / ForeginForegin
Volume, Issue, Page 7,pp.42089
Author and coauthor Shimizu Dai, Kanda Mitsuro, Tanaka Haruyoshi, Kobayashi Daisuke, Tanaka Chie, Hayashi Masamichi, Iwata Naoki, Niwa Yukiko, Takami Hideki, Yamada Suguru, Fujii Tsutomu, Nakayama Goro, Fujiwara Michitaka, Kodera Yasuhiro
Publication date 2017/02
Summary The prognosis of patients with gastric cancer (GC) with hematogenous metastasis is dismal. Identification of biomarkers specific for hematogenous metastasis is required to develop personalized treatments that improve patients' outcomes. Global expression profiling of GC tissues with synchronous hepatic metastasis without metastasis to the peritoneal cavity or distant lymph nodes was conducted using next-generation sequencing and identified the G protein-coupled receptor 155 (GPR155) as a candidate biomarker. GPR155 transcription was suppressed in GC cell lines compared with a nontumorigenic cell line. DNA methylation of the GPR155 promoter region was not detected, albeit 20% of GC cell lines harbored copy number loss at GPR155 locus. The expression levels of GPR155 mRNA correlated inversely with those of TWIST1 and WNT5B. Inhibition of GPR155 expression increased the levels of p-ERK1/2 and p-STAT1, significantly increased cell proliferation, and increased the invasiveness of a GC cell lines. GPR155 mRNA levels in GC clinical samples correlated with hematogenous metastasis and recurrence. Multivariate analysis revealed that reduced expression of GPR155 mRNA was an independent predictive marker of hematogenous metastasis. GPR155 may represent a biomarker for diagnosing and predicting hematogenous metastasis of GC.
DOI 10.1038/srep42089
PMID 28165032