PMID- 36186658 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221004 IS - 1687-8337 (Print) IS - 1687-8345 (Electronic) IS - 1687-8337 (Linking) VI - 2022 DP - 2022 TI - Blocking REDD1/TXNIP Complex Ameliorates HG-Induced Renal Tubular Epithelial Cell Apoptosis and EMT through Repressing Oxidative Stress. PG - 6073911 LID - 10.1155/2022/6073911 [doi] LID - 6073911 AB - Diabetic nephropathy (DN) has become the most common secondary kidney disease causing end-stage renal disease (ESRD). Nevertheless, the underlying mechanisms responsible for DN remain largely unknown. Regulated in development and DNA damage response 1 (REDD1) is a prooxidative molecule known to contribute to diabetes mellitus and its complications. However, it has not been previously examined whether and how REDD1 can further drive renal tubular epithelial cell (RTEC) apoptosis and epithelial-to-mesenchymal transition in DN. The expression of REDD1 was elevated in the kidneys of DN patients and diabetic mice in this study. By generating the DN model in REDD1 knockout mice, we demonstrated that REDD1 deficiency significantly improved apoptosis and EMT in diabetic mice. In vitro experiments showed that REDD1 generation was induced by high glucose (HG) in HK-2 cells. Similarly, the transfection of REDD1 siRNA plasmid also suppressed HG-induced apoptosis and EMT. Furthermore, we discovered that the inhibition of REDD1 suppressed the expression of Nox4-induced HG and reactive oxygen species (ROS) synthesis in HK-2 cells. In addition, HG could induce endogenous REDD1 and TXNIP to form a powerful complex. In summary, our findings demonstrate that blocking the REDD1/TXNIP complex can prevent HG-induced apoptosis and EMT by inhibiting ROS production, highlighting REDD1 as a valuable therapeutic priority site for DN. CI - Copyright (c) 2022 Lin Mu et al. FAU - Mu, Lin AU - Mu L AUID- ORCID: 0000-0003-2814-253X AD - Department of Pathology, Hebei Medical University, Shijiazhuang 050000, China. AD - Hebei Key Laboratory of Kidney Disease, Shijiazhuang 050000, China. AD - Department of Nephrology, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China. FAU - Chen, Nan AU - Chen N AUID- ORCID: 0000-0002-7408-4169 AD - Department of Pathology, Hebei Medical University, Shijiazhuang 050000, China. FAU - Chen, Yakun AU - Chen Y AUID- ORCID: 0000-0001-5590-6545 AD - Department of Nephrology, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China. FAU - Yang, Zhifen AU - Yang Z AUID- ORCID: 0000-0003-1464-0140 AD - Department of Pathology, Hebei Medical University, Shijiazhuang 050000, China. FAU - Zhou, Huandi AU - Zhou H AUID- ORCID: 0000-0002-2617-6157 AD - Department of Pathology, Hebei Medical University, Shijiazhuang 050000, China. FAU - Song, Shan AU - Song S AUID- ORCID: 0000-0002-2841-2213 AD - Department of Pathology, Hebei Medical University, Shijiazhuang 050000, China. AD - Hebei Key Laboratory of Kidney Disease, Shijiazhuang 050000, China. FAU - Shi, Yonghong AU - Shi Y AUID- ORCID: 0000-0002-8920-6966 AD - Department of Pathology, Hebei Medical University, Shijiazhuang 050000, China. AD - Hebei Key Laboratory of Kidney Disease, Shijiazhuang 050000, China. LA - eng PT - Journal Article DEP - 20220921 PL - Egypt TA - Int J Endocrinol JT - International journal of endocrinology JID - 101516376 PMC - PMC9519289 COIS- The authors declare no conflicts of interest. EDAT- 2022/10/04 06:00 MHDA- 2022/10/04 06:01 PMCR- 2022/09/21 CRDT- 2022/10/03 04:37 PHST- 2022/03/21 00:00 [received] PHST- 2022/08/14 00:00 [accepted] PHST- 2022/10/03 04:37 [entrez] PHST- 2022/10/04 06:00 [pubmed] PHST- 2022/10/04 06:01 [medline] PHST- 2022/09/21 00:00 [pmc-release] AID - 10.1155/2022/6073911 [doi] PST - epublish SO - Int J Endocrinol. 2022 Sep 21;2022:6073911. doi: 10.1155/2022/6073911. eCollection 2022.