Journal: Heliyon
Article Title: MCF2L-AS1/miR-874-3p/STAT3 feedback loop contributes to lung adenocarcinoma cell growth and cisplatin resistance
doi: 10.1016/j.heliyon.2023.e21342
Figure Lengend Snippet: STAT3 is a target of miR-874-3p. (A) Potential target mRNAs of miR-874-3p predicted by PITA, PicTar, miRanda, microT and miRmap. (B) Underlying downstream mRNAs that could be upregulated in LUAD cells and downregulated by miR-874-3p mimics. (C) RNA pull-down assay was utilized to examine the enrichment of STAT3, TRIB2 and SLC12A5 in miR-874-3p biotin probe. (D) The expression of STAT3 in human normal lung epithelial cell line (BEAS-2B) and LUAD cell lines (PC9, HCC827, A549 and NCI–H23). (E) The interaction between miR-874-3p together with MCF2L-AS1 and STAT3 was determined by RIP assay. (F) The potential binding site between miR-874-3p and STAT3 was predicted through starBase. (G) MiR-874-3p was verified to combine with STAT3 through luciferase reporter assay. (H–I) STAT3 mRNA and protein levels were assessed in LUAD cells transfected with miR-874-3p mimics. (J–K) qRT-PCR and Western blot assays were employed to detect the mRNA and protein levels of STAT3 in MCF2L-AS1 downregulated LUAD cells. **P < 0.01.
Article Snippet: The MCF2L-AS1 or STAT3-specific shRNAs (sh-MCF2L-AS1#1/2, sh-STAT3#1/2) and control (sh-NC), the pcDNA3.1/STAT3 and control (pcDNA3.1) were procured from Genepharma (Shanghai, China) for plasmid transfection.
Techniques: Pull Down Assay, Expressing, Binding Assay, Luciferase, Reporter Assay, Transfection, Quantitative RT-PCR, Western Blot