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  • Title: MicroRNA-371-5p targets SOX2 in gastric cancer.
    Author: Li YJ, Dong M, Kong FM, Zhou JP, Liang D, Xue HZ.
    Journal: Oncotarget; 2016 May 31; 7(22):31993-2005. PubMed ID: 27015119.
    Abstract:
    We evaluated miR-371-5p expression in gastric cancer (GC) tissues and its influence on the expression of downstream genes, especially SOX2. MiR-371-5p expression (measured using qRT-PCR) was upregulated in GC tissues and correlated positively with TNM staging and lymph node (LN) metastasis. MiR-371-5p expression was higher in human GC cell lines (AGS, MKN-28, BGC-823, MGC-803, SGC-7901 and MKN-45) than in human normal gastric epithelial (GES-1) cells (all P < 0.05). MGC-803 tumor cell growth (measured with an MTT assay), migration, and invasion (measured with Transwell chamber assays) were severely inhibited in cells transfected with a miR-371-5p inhibitor, whereas they were stimulated in cells transfected with SOX2 siRNA or miR-371-5p inhibitor + SOX2 siRNA. Expression of SOX2 mRNA and protein (assessed with qRT-PCR and Western blot) were greatly enhanced in the miR-371-5p inhibitor group. These results indicate that miR-371-5p expression is strongly upregulated in GC tissues and negatively correlated with SOX2 expression, while miR-371-5p expression is inversely related to proliferation, TNM stage, and LN metastasis of GC cells. Suppression of miR-371-5p may inhibit the growth and invasion of MGC-803 GC cells by upregulating SOX2 expression.
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