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2015 ; 8
(9
): 10800-7
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MiR-142-3p functions as a potential tumor suppressor directly targeting HMGB1 in
non-small-cell lung carcinoma
#MMPMID26617792
Xiao P
; Liu WL
Int J Clin Exp Pathol
2015[]; 8
(9
): 10800-7
PMID26617792
show ga
BACKGROUND: microRNAs (miRNAs) play a significant role in cancer development and
progression by regulating the expression of oncogenes or tumor suppressor genes.
Previous study using microarrays demonstrated that miR-142-3p was downregulated
in patients with Non-small-cell lung carcinoma (NSCLC). However, the functional
role of miR-142-3p in NSCLC is still unclear. MATERIAL AND METHOD: Real-time
quantitative PCR was applied to evaluate the expression level of miRNA-142-3p in
NSCLC and normal samples. The cell proliferation of NSCLC cells was analyzed by
MTT and colony formation assay after miR-142-3p transfection. Luciferase
activities assay, cotransfection and Western blot were used to reveal that the
predicted target genes of miR-125b were direct and specific. RESULTS: In this
study, we demonstrate miR-142-3p was downregulated in NSCLC tissues and cell
lines. We demonstrated that the overexpression of miR-142-3p inhibits NSCLC cell
proliferation and induced cell apoptosis. Furthermore, we demonstrate HMGB1 was a
directly target of miR-142-3p in NSCLC cells, and confirmed the target
specificity between miR-142-3p and the HMGB1 3'-untranslated region by luciferase
reporter assay. CONCLUSIONS: These results suggest that miR-142-3p may be a tumor
suppressor through the downregulation of HMGB1 in NSCLC. miR-142-3p may be a
tumor suppressor and a potential therapeutic agent for patients with NSCLC.