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Published on: March 30, 2019
LncRNA MCM3AP-AS1 inhibits cell proliferation in cervical squamous cell carcinoma by down-regulating miRNA-93
Liu Lan1, Zhishan Liang2, Yingxi Zhao1
1Department of Radiotheragy, The Second Affiliated Hospital of Guangxi University of Science and Technology, Liuzhou, Guangxi 545005, P.R. China.
Background:
MCM3AP antisense RNA 1 (MCM3AP-AS1) is characterized as an oncogenic lncRNA in hepatocellular carcinoma and glioblastoma. We analyzed TCGA dataset and observed the down-regulation of MCM3AP-AS1 in cervical squamous cell carcinoma (CSCC). The present study was therefore performed to investigate the role of MCM3AP-AS1 in CSCC.
Methods:
A total of 64 female patients with CSCC (38-68 years old; mean age: 53.1 ± 6.5 years old) were enrolled in the present study. RT-qPCR was performed to evaluate gene expression. Methylation specific PCR (MSP) was performed to assess the methylation of miR-93 gene after the overexpression and silencing of MCM3AP-AS1. Cell transfections were performed to investigate the interactions between MCM3AP-AS1 and miR-93. Cell proliferation was assessed by CCK-8 assay.
Results:
The results showed that MCM3AP-AS1 was down-regulated in CSCC and predicted poor survival. The expression levels of MCM3AP-AS1 were inversely correlated with the expression levels of miR-93. Overexpression of MCM3AP-AS1 led to down-regulation of miR-93, while silencing of MCM3AP-AS1 played an opposite role in CSCC cells. Methylation-specific PCR revealed that MCM3AP-AS1 could positively regulate the methylation of miR-93 gene. Cell proliferation analysis showed that overexpression of MCM3AP-AS1 led to reduced proliferation rate of CSCC cells. Silencing of MCM3AP-AS1 played an opposite role and overexpression of miR-93 reduced the effects of overexpressing MCM3AP-AS1.
Conclusions:
Therefore, MCM3AP-AS1 may inhibit cell proliferation in CSCC by down-regulating miRNA-93.
Insights
MCM3AP-AS1 is downregulated in cervical cancer and inhibits cell proliferation by reducing miR-93. This suggests MCM3AP-AS1 acts as a tumor suppressor in CSCC.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MCM3AP-AS1 is an oncogenic lncRNA in some cancers.
- MCM3AP-AS1 is downregulated in cervical squamous cell carcinoma (CSCC).
Purpose of the Study:
- Investigate the role of MCM3AP-AS1 in CSCC.
- Determine the relationship between MCM3AP-AS1 and miR-93 in CSCC.
Main Methods:
- Analyzed TCGA dataset for MCM3AP-AS1 expression.
- Used RT-qPCR and Methylation Specific PCR (MSP) to assess gene expression and methylation.
- Performed cell transfections and CCK-8 assays to evaluate gene interactions and cell proliferation.
Main Results:
- MCM3AP-AS1 is downregulated in CSCC and linked to poor survival.
- MCM3AP-AS1 inversely correlates with miR-93; it downregulates miR-93 expression and upregulates its methylation.
- Overexpression of MCM3AP-AS1 reduces CSCC cell proliferation, while silencing increases it.
Conclusions:
- MCM3AP-AS1 acts as a tumor suppressor in CSCC.
- MCM3AP-AS1 inhibits cell proliferation by downregulating miR-93.
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