PMID- 37507979 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230731 IS - 2076-3921 (Print) IS - 2076-3921 (Electronic) IS - 2076-3921 (Linking) VI - 12 IP - 7 DP - 2023 Jul 18 TI - Impaired NRF2 Inhibits Recovery from Ischemic Reperfusion Injury in the Aging Kidney. LID - 10.3390/antiox12071440 [doi] LID - 1440 AB - Deteriorating kidney function is frequently observed in the elderly population, as well as vulnerability to acute kidney failure, such as ischemic/reperfusion injury (IRI), and inadequate recovery from IRI is one of the mechanisms of kidney dysfunction in the elderly. The potential mediators in the progression of kidney dysfunction in the aging kidney have not yet been clearly revealed. In this study, we investigated the role of nuclear factor erythroid 2-related factor 2 (NRF2), which is an essential regulator of cellular redox homeostasis, in restoring kidney function after IRI in the aging kidney. NRF2 expression decreased significantly in the kidneys of old mice, as well as histologic and functional renal recovery after IRI; 45-min renal pedicle clamping was retarded in old compared with young mice. Persistent renal injury during the recovery phase after IRI was aggravated in NRF2 knockout (KO) mice compared to wild-type mice. Oxidative stress occurred in NRF2 KO old mice during the IRI recovery phase along with decreased expression of mitochondrial OXPHOS-related proteins and a reduction in mitochondrial ATP content. In vitro, hypoxia/reoxygenation (H/R) injury was aggravated in senescent human proximal tubuloepithelial cells after NRF2 restriction using NRF2 siRNA, which also increased the level of oxidative stress and deteriorated mitochondrial dysfunction. Treating the mice with an NRF2 activator, CDDO-Me, alleviated the injury. These results suggest that NRF2 may be a therapeutic target for the aging kidney. FAU - Jo, Min Jee AU - Jo MJ AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. AD - Convergence Research Center for Development New Drug, Korea University College of Medicine, Seoul 08308, Republic of Korea. FAU - Kim, Ji Eun AU - Kim JE AUID- ORCID: 0000-0003-3094-2229 AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. FAU - Bae, So Yon AU - Bae SY AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. FAU - Cho, Eunjung AU - Cho E AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. FAU - Ahn, Shin Young AU - Ahn SY AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. FAU - Kwon, Young Joo AU - Kwon YJ AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. FAU - Ko, Gang-Jee AU - Ko GJ AUID- ORCID: 0000-0001-7927-8651 AD - Department of Internal Medicine, Korea University College of Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea. LA - eng GR - 2021R1A6A3A01087658/National Research Foundation of Korea/ GR - 2019R1F1A1062663/National Research Foundation of Korea/ PT - Journal Article DEP - 20230718 PL - Switzerland TA - Antioxidants (Basel) JT - Antioxidants (Basel, Switzerland) JID - 101668981 PMC - PMC10376352 OTO - NOTNLM OT - NRF2 OT - aging OT - ischemic reperfusion injury OT - recovery from acute kidney injury COIS- The authors declare no conflict of interest. EDAT- 2023/07/29 11:47 MHDA- 2023/07/29 11:48 PMCR- 2023/07/18 CRDT- 2023/07/29 01:04 PHST- 2023/06/19 00:00 [received] PHST- 2023/07/13 00:00 [revised] PHST- 2023/07/15 00:00 [accepted] PHST- 2023/07/29 11:48 [medline] PHST- 2023/07/29 11:47 [pubmed] PHST- 2023/07/29 01:04 [entrez] PHST- 2023/07/18 00:00 [pmc-release] AID - antiox12071440 [pii] AID - antioxidants-12-01440 [pii] AID - 10.3390/antiox12071440 [doi] PST - epublish SO - Antioxidants (Basel). 2023 Jul 18;12(7):1440. doi: 10.3390/antiox12071440.