The positive feedback loop of RNASEH1-AS1/has-miR-218-5p/NET1 mediated by POU2F1 contributes to the development and progression of human lung squamous carcinoma

Abstract

Background In molecular level, competing endogenous RNAs (ceRNAs) regulates other RNA transcripts through competing for shared microRNAs (miRNA). miRNA negatively regulate gene expression at the levels of mRNAs stability and translation suppression. Methods We tested the mRNA level of miR-218-5p and RNASEH1-AS1 in clinical lung squamous cell carcinoma tissues by qRT-PCR. In the exploring of the role of miR-218-5p and RNASEH1-AS1 in the malignant phenotype of NCI-H520 cells, colony formation and MTT assay were used to test the cell viability and proliferation capability, trans-well invasion and wound healing assay were performed to examine the cell migration and invasion. ChIP assay was conducted to confirm the direct interact of POU2F1 and RNASEH1-AS1 promoter. Results In this investigation, we found that LncRNA RNASEH1-AS1 is up-regulated in human lung cancer, and serves as a miRNA sponge for hsa-miR-218-5p in human lung squamous carcinoma cells. lncRNA RNASEH1-AS1 facilitates growth and motility of lung squamous carcinoma cells, while miR-218-5p does the opposite. NET1 and POU2F1 are validated as direct and functional targets of miR-218-5p. The downregulation of miR-218-5p releases the suppression of NET1 and POU2F1. POU2F1 binds directly to the lncRNA-RNASEH1-AS1 promoter and acts as transcription factor to enhance the promoter activity of RNASEH1-AS1. Conclusion Above all, the positive feedback loop of RNASEH1-AS1/ hsa-miR-218-5p/ NET1/ POU2F1 can help us to understand the regulatory mechanism behind genesis and progression of human lung squamous carcinoma, possibly providing new biomarkers for its diagnosis and treatment.

LncRNAs harbouring regulatory motifs within repeat elements modulate immune response towards COVID‐19 disease severity and clinical outcomes

“…1 Downregulation of RNASEH1-AS1:23 and ROR1-AS1:6 may modulate heightened immune, inflammatory and stress response, as well as viral replication during mortality, mediated by miR-218-5p and miR-375. 2,3 DEG and GSEA analysis of study cohort in conjunction with LncRNA-miRNA-mRNA interaction network, highlight heightened inflammatory response (Files S3-S5; Figure 2C,D).…”

“…Partha Chattopadhyay 1,2 Pallavi Mishra 1 Kriti Khare 1,2 Aanchal Yadav 1,2 Priyanka Mehta 1 Sheeba Saifi 1 Aparna Swaminathan 1 Priti Devi 1,2 Shaista Parveen 1 Akansha Tyagi 3 Vinita Jha 3 Bansidhar Tarai 3 Sujeet Jha 3 Sandeep Budhiraja 3 Jitendra Narayan 1 Rajesh Pandey…”