PMID- 32905431 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220416 IS - 1758-5996 (Print) IS - 1758-5996 (Electronic) IS - 1758-5996 (Linking) VI - 12 DP - 2020 TI - LncRNA KCNQ1OT1 affects cell proliferation, apoptosis and fibrosis through regulating miR-18b-5p/SORBS2 axis and NF-kB pathway in diabetic nephropathy. PG - 77 LID - 10.1186/s13098-020-00585-5 [doi] LID - 77 AB - BACKGROUND: It has been reported that long non-coding RNAs (lncRNAs) play vital roles in diabetic nephropathy (DN). Our study aims to research the function of lncRNA KCNQ1OT1 in DN cells and the molecular mechanism. METHODS: Human glomerular mesangial cells (HGMCs) and human renal glomerular endothelial cells (HRGECs) were cultured in high glucose (30 mM) condition as models of DN cells. KCNQ1 opposite strand/antisense transcript 1 (KCNQ1OT1) and miR-18b-5p levels were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The mRNA and protein levels of Sorbin and SH3 domain-containing protein 2 (SORBS2), Type IV collagen (Col-4), fibronectin (FN), transcriptional regulatory factor-beta 1 (TGF-beta1), Twist, NF-kappaB and STAT3 were measured by qRT-PCR and western blot. Cell viability was detected by cell counting kit-8 (CCK-8) assay for selecting the proper concentration of glucose treatment. Additionally, 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) and flow cytometry assay were employed to determine cell proliferation and apoptosis, respectively. The targets of KCNQ1OT1 was predicted by online software and confirmed by dual-luciferase reporter assay. RESULTS: KCNQ1OT1 and SORBS2 were elevated in DN. Both knockdown of KCNQ1OT1 and silencing of SORBS2 restrained proliferation and fibrosis and induced apoptosis in DN cells. Besides, Overexpression of SORBS2 restored the KCNQ1OT1 knockdown-mediate effects on proliferation, apoptosis and fibrosis in DN cells. In addition, miR-18b-5p served as a target of KCNQ1OT1 as well as targeted SORBS2. KCNQ1OT1 knockdown repressed NF-kB pathway. CONCLUSION: KCNQ1OT1 regulated DN cells proliferation, apoptosis and fibrosis via KCNQ1OT1/miR-18b-5p/SORBS2 axis and NF-kB pathway. CI - (c) The Author(s) 2020. FAU - Jie, Ran AU - Jie R AD - Department of Endocrinology, First People's Hospital of Jingzhou, Shashi District, No. 8 Hangkong Road, Jingzhou, 434000 Hubei China. GRID: grid.459509.4 FAU - Zhu, Pengpeng AU - Zhu P AD - Department of Anesthesiology, First People's Hospital of Jingzhou, Jingzhou, 434000 Hubei China. GRID: grid.459509.4 FAU - Zhong, Jiao AU - Zhong J AD - Health Management Center, First People's Hospital of Jingzhou, Jingzhou, 434000 Hubei China. GRID: grid.459509.4 FAU - Zhang, Yan AU - Zhang Y AD - Department of Gastroenterology, First People's Hospital of Jingzhou, Jingzhou, 434000 Hubei China. GRID: grid.459509.4 FAU - Wu, Hongyan AU - Wu H AD - Department of Endocrinology, First People's Hospital of Jingzhou, Shashi District, No. 8 Hangkong Road, Jingzhou, 434000 Hubei China. GRID: grid.459509.4 LA - eng PT - Journal Article DEP - 20200903 PL - England TA - Diabetol Metab Syndr JT - Diabetology & metabolic syndrome JID - 101488958 PMC - PMC7469295 OTO - NOTNLM OT - Diabetic nephropathy OT - KCNQ1OT1 OT - NF-kB pathway OT - SORBS2 OT - miR-18b-5p COIS- Competing interestsThe authors declare that they have no competing interests. EDAT- 2020/09/10 06:00 MHDA- 2020/09/10 06:01 PMCR- 2020/09/03 CRDT- 2020/09/09 18:14 PHST- 2020/05/21 00:00 [received] PHST- 2020/08/21 00:00 [accepted] PHST- 2020/09/09 18:14 [entrez] PHST- 2020/09/10 06:00 [pubmed] PHST- 2020/09/10 06:01 [medline] PHST- 2020/09/03 00:00 [pmc-release] AID - 585 [pii] AID - 10.1186/s13098-020-00585-5 [doi] PST - epublish SO - Diabetol Metab Syndr. 2020 Sep 3;12:77. doi: 10.1186/s13098-020-00585-5. eCollection 2020.