PMID- 37016580 OWN - NLM STAT- MEDLINE DCOM- 20230510 LR - 20240504 IS - 1525-0024 (Electronic) IS - 1525-0016 (Print) IS - 1525-0016 (Linking) VI - 31 IP - 5 DP - 2023 May 3 TI - Epsin1-mediated exosomal sorting of Dll4 modulates the tubular-macrophage crosstalk in diabetic nephropathy. PG - 1451-1467 LID - S1525-0016(23)00160-0 [pii] LID - 10.1016/j.ymthe.2023.03.027 [doi] AB - Tubular epithelial cells (TECs) play critical roles in the development of diabetic nephropathy (DN), and can activate macrophages through the secretion of exosomes. However, the mechanism(s) of TEC-exosomes in macrophage activation under DN remains unknown. By mass spectrometry, 1,644 differentially expressed proteins, especially Dll4, were detected in the urine exosomes of DN patients compared with controls, which was confirmed by western blot assay. Elevated Epsin1 and Dll4/N1ICD expression was observed in kidney tissues in both DN patients and db/db mice and was positively associated with tubulointerstitial damage. Exosomes from high glucose (HG)-treated tubular cells (HK-2) with Epsin1 knockdown (KD) ameliorated macrophage activation, TNF-alpha, and IL-6 expression, and tubulointerstitial damage in C57BL/6 mice in vivo. In an in vitro study, enriched Dll4 was confirmed in HK-2 cells stimulated with HG, which was captured by THP-1 cells and promoted M1 macrophage activation. In addition, Epsin1 modulated the content of Dll4 in TEC-exosomes stimulated with HG. TEC-exosomes with Epsin1-KD significantly inhibited N1ICD activation and iNOS expression in THP-1 cells compared with incubation with HG alone. These findings suggested that Epsin1 could modulate tubular-macrophage crosstalk in DN by mediating exosomal sorting of Dll4 and Notch1 activation. CI - Copyright (c) 2023 The Author(s). Published by Elsevier Inc. All rights reserved. FAU - Liu, Jia-Lu AU - Liu JL AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Zhang, Lei AU - Zhang L AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Huang, Ying AU - Huang Y AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Li, Xiao-Hui AU - Li XH AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Liu, Yi-Fei AU - Liu YF AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Zhang, Shu-Min AU - Zhang SM AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Zhao, Yue-E AU - Zhao YE AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Chen, Xiao-Jun AU - Chen XJ AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Liu, Yu AU - Liu Y AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - He, Li-Yu AU - He LY AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Dong, Zheng AU - Dong Z AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China; Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA, USA; Charlie Norwood VA Medical Center, Augusta, GA, USA. FAU - Liu, Fu-You AU - Liu FY AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Sun, Lin AU - Sun L AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. FAU - Xiao, Li AU - Xiao L AD - Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. Electronic address: xiaolizndx@csu.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230403 PL - United States TA - Mol Ther JT - Molecular therapy : the journal of the American Society of Gene Therapy JID - 100890581 RN - IY9XDZ35W2 (Glucose) RN - 0 (epsin) RN - 0 (DLL4 protein, mouse) SB - IM MH - Animals MH - Mice MH - Cell Movement MH - *Diabetes Mellitus/metabolism MH - *Diabetic Nephropathies/metabolism MH - Epithelial Cells/metabolism MH - Glucose/metabolism MH - Macrophages/metabolism MH - Mice, Inbred C57BL PMC - PMC10188907 OTO - NOTNLM OT - Dll4 OT - Epsin1 OT - diabetic nephropathy OT - exosome OT - inflammation COIS- Declaration of interests The authors declare no competing interests. EDAT- 2023/04/06 06:00 MHDA- 2023/05/08 06:41 PMCR- 2024/05/03 CRDT- 2023/04/05 01:36 PHST- 2022/09/27 00:00 [received] PHST- 2023/02/18 00:00 [revised] PHST- 2023/03/28 00:00 [accepted] PHST- 2023/05/08 06:41 [medline] PHST- 2023/04/06 06:00 [pubmed] PHST- 2023/04/05 01:36 [entrez] PHST- 2024/05/03 00:00 [pmc-release] AID - S1525-0016(23)00160-0 [pii] AID - 10.1016/j.ymthe.2023.03.027 [doi] PST - ppublish SO - Mol Ther. 2023 May 3;31(5):1451-1467. doi: 10.1016/j.ymthe.2023.03.027. Epub 2023 Apr 3.