PMID- 36277207 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221025 IS - 1664-042X (Print) IS - 1664-042X (Electronic) IS - 1664-042X (Linking) VI - 13 DP - 2022 TI - Hyperhomocysteinemia exacerbates acute kidney injury via increased mitochondrial damage. PG - 967104 LID - 10.3389/fphys.2022.967104 [doi] LID - 967104 AB - Acute kidney injury (AKI) is a complex and common set of multifactorial clinical syndromes, and associated with increased in-hospital mortality. There is increasing evidence that Hyperhomocysteinemia (HHcy) is highly associated with the development of a variety of kidney diseases, including AKI. However, the pathogenesis of HHcy in AKI remains unclear. In this study, we investigated the effect and mechanism of HHcy on cisplatin-induced AKI in mice and NRK-52E cells cultured with HHcy. We confirmed that mice with HHcy had higher serum levels of creatinine and more severe renal tubule injury after cisplatin injection. We found that HHcy aggravated renal mitochondrial damage, mainly manifested as decreased ATP beta, significantly increased cytoplasmic Cyt C expression and the ADP/ATP ratio, and a significantly decreased mitochondrial DNA (mtDNA) copy number. In addition, we found that HHcy accelerated cisplatin-induced renal DNA damage; culturing NRK-52E cells with homocysteine (Hcy) could significantly increase apoptosis and mitochondrial damage. Interestingly, we found that Mdivi-1 reduced Hcy-induced mitochondrial damage, thereby reducing the level of apoptosis. In conclusion, these results suggest that HHcy might aggravate the development of AKI by increasing mitochondrial damage and that reducing Hcy levels or inhibiting mitochondrial damage may be a potential therapeutic strategy to delay the development of AKI. CI - Copyright (c) 2022 Zhang, Dong, Da, Yuan, Zha and Long. FAU - Zhang, Mei AU - Zhang M AD - Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People's Hospital, Guiyang, China. FAU - Dong, Rong AU - Dong R AD - Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People's Hospital, Guiyang, China. FAU - Da, Jingjing AU - Da J AD - Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People's Hospital, Guiyang, China. AD - Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China. FAU - Yuan, Jing AU - Yuan J AD - Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People's Hospital, Guiyang, China. AD - Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China. FAU - Zha, Yan AU - Zha Y AD - Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People's Hospital, Guiyang, China. AD - Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China. FAU - Long, Yanjun AU - Long Y AD - Department of Nephrology, Guizhou Provincial Institute of Nephritic & Urinary Disease, Guizhou Provincial People's Hospital, Guiyang, China. AD - Department of Biomedicine, Guizhou University School of Medicine, Guizhou University, Guiyang, China. AD - Department of Nephrology, People's Hospital of Zhenfeng County, Qianxinan, Guizhou, China. LA - eng PT - Journal Article DEP - 20221005 PL - Switzerland TA - Front Physiol JT - Frontiers in physiology JID - 101549006 PMC - PMC9581205 OTO - NOTNLM OT - DNA damage OT - Hyperhomocysteinemia OT - acute kidney injury OT - apoptosis OT - mitochondrial damage COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/10/25 06:00 MHDA- 2022/10/25 06:01 PMCR- 2022/10/05 CRDT- 2022/10/24 04:28 PHST- 2022/06/12 00:00 [received] PHST- 2022/09/20 00:00 [accepted] PHST- 2022/10/24 04:28 [entrez] PHST- 2022/10/25 06:00 [pubmed] PHST- 2022/10/25 06:01 [medline] PHST- 2022/10/05 00:00 [pmc-release] AID - 967104 [pii] AID - 10.3389/fphys.2022.967104 [doi] PST - epublish SO - Front Physiol. 2022 Oct 5;13:967104. doi: 10.3389/fphys.2022.967104. eCollection 2022.