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Shao Y, Chen J, Freeman W, Dong LJ, Zhang ZH, Xu M, Qiu F, Du Y, Liu J, Li XR, Ma JX. Canonical Wnt Signaling Promotes Neovascularization Through Determination of Endothelial Progenitor Cell Fate via Metabolic Profile Regulation. Stem Cells 2019; 37:1331-1343. [PMID: 31233254 PMCID: PMC6851557 DOI: 10.1002/stem.3049] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 06/04/2019] [Indexed: 01/27/2023]
Abstract
Endothelial progenitor cells (EPCs) contribute to blood vessel formation. Canonical Wnt signaling plays an important role in physiological and pathological angiogenesis and EPC fate regulation. However, the mechanism for Wnt signaling to regulate EPC fate in neovascularization (NV) has not been clearly defined. Here, we showed that very low-density lipoprotein receptor knockout (Vldlr -/- ) mice, a model of ocular NV induced by Wnt signaling overactivation, have increased EPC numbers in the bone marrow, blood, and retina, as well as an elevated mitochondrial membrane potential indicating higher mitochondrial function of EPCs in the circulation. Isolated EPCs from Vldlr -/- mice showed overactivated Wnt signaling, correlating with increased mitochondrial function, mass, and DNA copy numbers, compared with WT EPCs. Our results also demonstrated that Wnt signaling upregulated mitochondrial biogenesis and function, while inhibiting glycolysis in EPCs, which further decreased EPC stemness and promoted EPCs to a more active state toward differentiation, which may contribute to pathologic vascular formation. Fenofibric acid, an active metabolite of fenofibrate, inhibited Wnt signaling and mitochondrial function in EPCs and decreased EPC numbers in Vldlr -/- mice. It also decreased mitochondrial biogenesis and reactive oxygen species production in Vldlr -/- EPCs, which may be responsible for its therapeutic effect on diabetic retinopathy. These findings demonstrated that Wnt signaling regulates EPC fate through metabolism, suggesting potential application of the EPC metabolic profile as predictor and therapeutic target for neovascular diseases. Stem Cells 2019;37:1331-1343.
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Affiliation(s)
- Yan Shao
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China.,Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.,Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjing Medical University Eye Hospital, Tianjin, China
| | - Jianglei Chen
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Willard Freeman
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Li-Jie Dong
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China.,Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Zhi-Hui Zhang
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Manhong Xu
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Fangfang Qiu
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Yanhong Du
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Juping Liu
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Xiao-Rong Li
- Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China.,Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjing Medical University Eye Hospital, Tianjin, China
| | - Jian-Xing Ma
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.,Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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