PMID- 23123403 OWN - NLM STAT- MEDLINE DCOM- 20130204 LR - 20211021 IS - 1533-3450 (Electronic) IS - 1046-6673 (Print) IS - 1046-6673 (Linking) VI - 23 IP - 12 DP - 2012 Dec TI - Vitamin D receptor signaling in podocytes protects against diabetic nephropathy. PG - 1977-86 LID - 10.1681/ASN.2012040383 [doi] AB - Vitamin D and its analogs have antiproteinuric activity and podocytes express the vitamin D receptor, but whether vitamin D signaling in podocytes accounts for this renoprotection is unknown. To investigate this question, we used the 2.5 kb podocin promoter to target Flag-tagged human vitamin D receptor (hVDR) to podocytes in DBA/2J mice. After the induction of diabetes with streptozotocin, transgenic mice had less albuminuria than wild-type controls. In transgenic mice, a low dose of the vitamin D analog doxercalciferol prevented albuminuria, markedly attenuated podocyte loss and apoptosis, and reduced glomerular fibrosis, but it had little effect on the progression of diabetic nephropathy in wild-type mice. Moreover, reconstitution of VDR-null mice with the hVDR transgene in podocytes rescued VDR-null mice from severe diabetes-related renal damage. In culture, 1,25-dihydroxyvitamin D suppressed high-glucose-induced apoptosis of podocytes by blocking p38- and ERK-mediated proapoptotic pathways. Taken together, these data provide strong evidence that vitamin D/VDR signaling in podocytes plays a critical role in the protection of the kidney from diabetic injury. FAU - Wang, Youli AU - Wang Y AD - Department of Medicine, Division of Biological Sciences, The University of Chicago, Chicago, IL 60637, USA. FAU - Deb, Dilip K AU - Deb DK FAU - Zhang, Zhongyi AU - Zhang Z FAU - Sun, Tao AU - Sun T FAU - Liu, Weicheng AU - Liu W FAU - Yoon, Dosuk AU - Yoon D FAU - Kong, Juan AU - Kong J FAU - Chen, Yunzi AU - Chen Y FAU - Chang, Anthony AU - Chang A FAU - Li, Yan Chun AU - Li YC LA - eng GR - UL1 RR024999/RR/NCRR NIH HHS/United States GR - P30 CA014599/CA/NCI NIH HHS/United States GR - R01 HL085793/HL/NHLBI NIH HHS/United States GR - 5P30CA014599-36/CA/NCI NIH HHS/United States GR - UL1RR024999/RR/NCRR NIH HHS/United States GR - HL085793/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20121102 PL - United States TA - J Am Soc Nephrol JT - Journal of the American Society of Nephrology : JASN JID - 9013836 RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Membrane Proteins) RN - 0 (NPHS2 protein) RN - 0 (Receptors, Calcitriol) SB - IM MH - Animals MH - Apoptosis MH - Diabetes Mellitus, Experimental/*complications/metabolism MH - Diabetic Nephropathies/genetics/*metabolism MH - Female MH - Humans MH - Hyperglycemia/*complications/metabolism MH - Intracellular Signaling Peptides and Proteins/genetics MH - Male MH - Membrane Proteins/genetics MH - Mice MH - Mice, Inbred DBA MH - Mice, Knockout MH - Podocytes/*metabolism MH - Pregnancy MH - Promoter Regions, Genetic MH - Receptors, Calcitriol/*metabolism PMC - PMC3507366 EDAT- 2012/11/06 06:00 MHDA- 2013/02/05 06:00 PMCR- 2013/11/30 CRDT- 2012/11/06 06:00 PHST- 2012/11/06 06:00 [entrez] PHST- 2012/11/06 06:00 [pubmed] PHST- 2013/02/05 06:00 [medline] PHST- 2013/11/30 00:00 [pmc-release] AID - ASN.2012040383 [pii] AID - 2012040383 [pii] AID - 10.1681/ASN.2012040383 [doi] PST - ppublish SO - J Am Soc Nephrol. 2012 Dec;23(12):1977-86. doi: 10.1681/ASN.2012040383. Epub 2012 Nov 2.