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MicroRNA‑183 (miR‑183) is a small, non‑coding RNA that is involved in post‑transcriptional processes, is upregulated in gastric cancer and acts as an oncogene in cancer migration. Although fragmentary reports have demonstrated the importance of miR‑183 in gastric cancer, its biofunctions and regulatory effects are still unknown. In the present study, the gene and protein expression levels were determined by reverse transcription‑quantitative PCR and western blot analysis. The connection between miR‑183‑5p.1 and tropomyosin 1 (TPM1) was tested through luciferase reporter experiments. Cell viability, apoptosis and related proteins were detected by MTT assay, flow cytometry, immunofluorescence and western blotting, respectively. The migration and invasion of AGS cells modulated by miR‑183‑5p.1 were analyzed by Transwell assay. TPM1 expression was found to be decreased in gastric cancer tissues and cell lines when compared with normal and adjacent tissues and gastric epithelial cells, and was regulated by miR‑183‑5p.1 targeting TPM1. miR‑183‑5p.1 overexpression facilitated the growth and suppressed the death of AGS cells through Bcl‑2 and P53 proteins. In addition, miR‑183‑5p.1 restricted TPM1, TPM2 and TPM3 protein expression in AGS cells. The excessive levels of miR‑183‑5p.1 promoted the migration and invasion of AGS cells, and inhibited the apoptosis of AGS cells. However, the knockdown of miR‑183‑5p.1 induced the opposite in AGS cells. In conclusion, miR‑183‑5p.1 promotes cell proliferation, migration and invasion by downregulating TPM1 and deactivating the Bcl‑2/P53 signaling pathways in gastric cancer, indicating that miR‑183‑5p.1 and TPM1 may be potential targets for the diagnosis or therapy of gastric cancer in the future.
Pubmed ID: 31638242 RIS Download
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Central online repository for microRNA nomenclature, sequence data, annotation and target prediction.Collection of published miRNA sequences and annotation.
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View all literature mentionsSoftware for single-cell flow cytometry analysis. Its functions include management, display, manipulation, analysis and publication of the data stream produced by flow and mass cytometers.
View all literature mentionsWeb tool to predict biological targets of miRNAs by searching for presence of conserved 8mer, 7mer and 6mer sites that match seed region of each miRNA. Nonconserved sites are also predicted and sites with mismatches in seed region that are compensated by conserved 3' pairing. Used to search for predicted microRNA targets in mammals.
View all literature mentionsA resource for animal miRNA-target interactions consisting of the Validated Targets component, a large, high-quality database of experimentally validated miRNA targets resulting from meticulous literature curation, and the Predicted Targets component, an integration of predicted miRNA targets produced by 11 established miRNA target prediction programs. April 27, 2013, the Validated Targets component of miRecords hosts 2705 records of interactions between 644 miRNAs and 1901 target genes in 9 animal species. Among these records, 2028 were curated from low throughput experiments. The Predicted Targets component of mIRecords integrates the predicted targets of the following miRNA target prediction tools: DIANA-microT, MicroInspector, miRanda, MirTarget2, miTarget, NBmiRTar, PicTar, PITA, RNA22, RNAhybrid, and TargetScan/TargertScanS. We would be glad to include your experimentally validated miRNA target data (published or unpublished) into miRecords.
View all literature mentionsCell line GES-1 is a Transformed cell line with a species of origin Homo sapiens (Human)
View all literature mentionsCell line HGC-27 is a Cancer cell line with a species of origin Homo sapiens (Human)
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