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Understanding the role of miRNA-143 (miR-143) in ischemia-induced retinopathy via RNA transcriptome profiling

ABSTRACT: To investigate molecular network mediated by miR-143, we analyzed the transcriptome profile of retinas isolated from neonatal pups subjected to either normoxia or oxygen-induced retinopathy (OIR) for 14 days (P14) receiving an intravitreal injection of either scrambled miRNAs (control) or miR-143 mimics. Total RNAs were isolated from the retinas and subjected to RNA-Seq. Analysis of RNA-Seq data identified 2064 genes with altered levels between OIR rats and shame rats receiving scrambled RNAs (adjusted p<0.05).

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE104588 | GEO | 2021/10/01

REPOSITORIES: GEO

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Project description:Breast cancer (BC) is a commonly identified life-threatening type of cancer and a major cause of death among women worldwide. Several microRNAs (miRs), including miR-143-5p, have been reported to be vital for regulating hallmarks of cancer; however, the effect of miR-143-5p on BC requires further exploration. The present study performed bioinformatics analysis on GSE42072 and GSE41922 datasets from the National Center for Biotechnology Information Gene Expression Omnibus (GEO) database to identify miR-143-5p expression patterns. Furthermore, miR-143-5p expression was detected in BC cell lines and tissues via reverse transcription-quantitative PCR. Post-transfection with miR-143-5p mimics, Cell Counting Kit-8, colony formation and Transwell assays were performed to explore the effects of miR-143-5p on BC cell proliferation, colony formation, and migration. The association of miR-143-5p with the hypoxia-inducible factor-1α (HIF-1α)-associated glucose transporter 1 (GLUT1) pathway was explored via western blotting, immunofluorescence and dual-luciferase reporter assay. The present study detected high expression of miR-143-5p in BC tissue of the GSE42072 and serum of the GSE41922 datasets by GEO chip analysis. Additionally, the expression levels of miR-143-5p were decreased in BC tissues compared with those in adjacent healthy tissues, and low miR-143-5p expression was associated with a poorer prognosis and shorter survival time in patients with BC. In vitro, miR-143-5p expression levels were decreased in BC cells, and transfection with miR-143-5p mimics suppressed BC cell proliferation, colony formation, migration. Furthermore, miR-143-5p targeted the HIF-1α-related GLUT1 pathway, and inhibited HIF-1α and GLUT1 expression. Additionally, HIF-1α agonists reversed the miR-143-5p-induced inhibition during tumorigenesis. In conclusion, miR-143-5p exhibited low expression in BC tissues, and suppressed BC cell proliferation, colony formation, migration. Moreover, the antitumor effects of miR-143-5p targeted the HIF-1α-related GLUT1 pathway.

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Understanding the role of miRNA-143 (miR-143) in ischemia-induced retinopathy via RNA transcriptome profiling

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