microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb
Several microRNAs (miRNAs) have been reported as oncogenes or tumor suppressors in many cancers, including gastric cancer (GC). However, the role and molecular mechanism of miR-3129 in GC is largely unknown. We aimed to explore the function and the underlying molecular mechanism of miR-3129 in GC. C...
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2018-05-01
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doaj-111b61bc3f4b48598886586ef077793a2020-11-25T00:16:57ZengAssociação Brasileira de Divulgação CientíficaBrazilian Journal of Medical and Biological Research1414-431X2018-05-0151610.1590/1414-431x20186452S0100-879X2018000600612microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRbShaofeng YangNan ShengLili PanJing CaoJiao LiuRan MaSeveral microRNAs (miRNAs) have been reported as oncogenes or tumor suppressors in many cancers, including gastric cancer (GC). However, the role and molecular mechanism of miR-3129 in GC is largely unknown. We aimed to explore the function and the underlying molecular mechanism of miR-3129 in GC. Cancer tissues and corresponding adjacent tissues were collected from 50 patients with GC, and the expression of miR-3129 was detected by RT-qPCR. The expression of miR-3129 and pRb in human GC cell line SCG7091 was altered by transient transfection. Thereafter, MTT and flow cytometry assays were used to analyze cell viability and cell cycle. The expression of cyclin E, CDK2, CDK2 inhibitors (p16 and 21), and pRb were detected by RT-qPCR and western blot. A significant up-regulation of miR-3129 was observed in GC tissues compared to adjacent tissues. Overexpression of miR-3129 significantly improved cell viability after 4 days of post-transfection. Flow cytometry assay results showed that the miR-3129 overexpression arrested more SGC7901 cells at S phase. Moreover, overexpression of miR-3129 down-regulated the expression of CDK2 inhibitors while it up-regulated the expression levels of cyclin E, CDK2, and pRb. Interestingly, we found that pRb inhibition reversed the effect of miR-3129 inhibitor on cell proliferation in SGC7901 cells, increased cell viability, reduced cells at G0/1 phase, and modulated the expression of proliferation-related factors. Our results revealed that miR-3129 functioned as an oncogene through positive regulation of pRb and may prove to be a promising option for molecular therapy of GC.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000600612&lng=en&tlng=enmicroRNA-3129Gastric cancerpRbProliferationCell cycle |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shaofeng Yang Nan Sheng Lili Pan Jing Cao Jiao Liu Ran Ma |
spellingShingle |
Shaofeng Yang Nan Sheng Lili Pan Jing Cao Jiao Liu Ran Ma microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb Brazilian Journal of Medical and Biological Research microRNA-3129 Gastric cancer pRb Proliferation Cell cycle |
author_facet |
Shaofeng Yang Nan Sheng Lili Pan Jing Cao Jiao Liu Ran Ma |
author_sort |
Shaofeng Yang |
title |
microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb |
title_short |
microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb |
title_full |
microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb |
title_fullStr |
microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb |
title_full_unstemmed |
microRNA-3129 promotes cell proliferation in gastric cancer cell line SGC7901 via positive regulation of pRb |
title_sort |
microrna-3129 promotes cell proliferation in gastric cancer cell line sgc7901 via positive regulation of prb |
publisher |
Associação Brasileira de Divulgação Científica |
series |
Brazilian Journal of Medical and Biological Research |
issn |
1414-431X |
publishDate |
2018-05-01 |
description |
Several microRNAs (miRNAs) have been reported as oncogenes or tumor suppressors in many cancers, including gastric cancer (GC). However, the role and molecular mechanism of miR-3129 in GC is largely unknown. We aimed to explore the function and the underlying molecular mechanism of miR-3129 in GC. Cancer tissues and corresponding adjacent tissues were collected from 50 patients with GC, and the expression of miR-3129 was detected by RT-qPCR. The expression of miR-3129 and pRb in human GC cell line SCG7091 was altered by transient transfection. Thereafter, MTT and flow cytometry assays were used to analyze cell viability and cell cycle. The expression of cyclin E, CDK2, CDK2 inhibitors (p16 and 21), and pRb were detected by RT-qPCR and western blot. A significant up-regulation of miR-3129 was observed in GC tissues compared to adjacent tissues. Overexpression of miR-3129 significantly improved cell viability after 4 days of post-transfection. Flow cytometry assay results showed that the miR-3129 overexpression arrested more SGC7901 cells at S phase. Moreover, overexpression of miR-3129 down-regulated the expression of CDK2 inhibitors while it up-regulated the expression levels of cyclin E, CDK2, and pRb. Interestingly, we found that pRb inhibition reversed the effect of miR-3129 inhibitor on cell proliferation in SGC7901 cells, increased cell viability, reduced cells at G0/1 phase, and modulated the expression of proliferation-related factors. Our results revealed that miR-3129 functioned as an oncogene through positive regulation of pRb and may prove to be a promising option for molecular therapy of GC. |
topic |
microRNA-3129 Gastric cancer pRb Proliferation Cell cycle |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000600612&lng=en&tlng=en |
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