Document Detail

MicroRNA library-based functional screening identified miR-137 as a suppresser of gastric cancer cell proliferation.
MedLine Citation:
PMID:  25342326     Owner:  NLM     Status:  Publisher    
PURPOSES: Uncontrolled proliferation is a key characteristic of gastric carcinogenesis and the precise mechanisms underlying the altered proliferation behaviors of GC cells have not been clearly elucidated. miRNAs has been suggested to play a crucial role in the pathogenesis and development of various cancers. In the present study, we employed an impedance-based real-time cell electronic sensing (RT-CES) system to detect the effects of ectopically expressed miRNAs on GC cell proliferation.
METHODS: miRNA mimics were transfected into gastric cancer cell line SGC7901 and the effect of individual miRNA on the proliferation rate of the cells was measured by the RT-CES system. The screening results were validated with qRT-PCR and miR-137 was selected for further research. The effects of ectopically expressed miR-137 on GC cell growth and cell cycle progress were measured using MTT assay and flow cytometry. The target gene of miR-137 was predicted using different bioinformatics tools and the direct interaction between miR-137 and the 3'-UTR was confirmed with a luciferase reporter assay. The in vivo effect of miR-137 on GC cell proliferation was examined with a tumor-bearing nude mouse model. The correlation between miR-137 expression and patients' prognosis was explored in a cohort of 38 patients. Prognosis was explored in a cohort of 38 patients.
RESULTS: Ectopic expression of miR-137 was sufficient to inhibit GC cell proliferation both in vitro and in vivo. Bioinformatics prediction and luciferase reporter assay revealed CDK6 as a target gene through which miR-137 exerted an inhibitory function. Moreover, miR-137 expression positively correlated with better prognosis.
CONCLUSION: Our data indicated an important regulatory role of miR-137 in GC cell proliferation and that it may be explored as a prognostic marker for GC.
Xiushan Zheng; Jiaqiang Dong; Taiqian Gong; Zhiyong Zhang; Ying Wang; Yunming Li; Yulong Shang; Kai Li; Gui Ren; Bin Feng; Juntang Li; Qifei Tian; Shanhong Tang; Li Sun; Mengbin Li; Hongwei Zhang; Daiming Fan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-24
Journal Detail:
Title:  Journal of cancer research and clinical oncology     Volume:  -     ISSN:  1432-1335     ISO Abbreviation:  J. Cancer Res. Clin. Oncol.     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-24     Completed Date:  -     Revised Date:  2014-10-25    
Medline Journal Info:
Nlm Unique ID:  7902060     Medline TA:  J Cancer Res Clin Oncol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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