ニワ　ユキコ   NIWA Yukiko   丹羽　由紀子    所属   医学部 医学科（附属八千代医療センター）    職種   講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	GPR155 Serves as a Predictive Biomarker for Hematogenous Metastasis in Patients with Gastric Cancer.
掲載誌名	正式名：Scientific reports 略　 称：Sci Rep ISSNコード：20452322/20452322
掲載区分	国外
巻・号・頁	7,pp.42089
著者・共著者	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
発行年月	2017/02
概要	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