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Shi D, Qi M, Zhou L, Li X, Ni L, Li C, Yuan T, Wang Y, Chen Y, Hu C, Liang D, Li L, Liu Y, Li J, Chen YH. Endothelial Mitochondrial Preprotein Translocase Tomm7-Rac1 Signaling Axis Dominates Cerebrovascular Network Homeostasis. Arterioscler Thromb Vasc Biol 2019; 38:2665-2677. [PMID: 30354240 DOI: 10.1161/atvbaha.118.311538] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Objective- Mitochondria are the important yet most underutilized target for cardio-cerebrovascular function integrity and disorders. The Tom (translocases of outer membrane) complex are the critical determinant of mitochondrial homeostasis for making organs acclimate physiological and pathological insults; however, their roles in the vascular system remain unknown. Approach and Results- A combination of studies in the vascular-specific transgenic zebrafish and genetically engineered mice was conducted. Vascular casting and imaging, endothelial angiogenesis, and mitochondrial protein import were performed to dissect potential mechanisms. A loss-of-function genetic screening in zebrafish identified that selective inactivation of the tomm7 (translocase of outer mitochondrial membrane 7) gene, which encodes a small subunit of the Tom complex, specially impaired cerebrovascular network formation. Ablation of the ortholog Tomm7 in mice recapitulated cerebrovascular abnormalities. Restoration of the cerebrovascular anomaly by an endothelial-specific transgenesis of tomm7 further indicated a defect in endothelial function. Mechanistically, Tomm7 deficit in endothelial cells induced an increased import of Rac1 (Ras-related C3 botulinum toxin substrate 1) protein into mitochondria and facilitated the mitochondrial Rac1-coupled redox signaling, which incurred angiogenic impairment that underlies cerebrovascular network malformation. Conclusions- Tomm7 drives brain angiogenesis and cerebrovascular network formation through modulating mitochondrial Rac1 signaling within the endothelium.
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Affiliation(s)
- Dan Shi
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Man Qi
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Liping Zhou
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Xiang Li
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Le Ni
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Changming Li
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Tianyou Yuan
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Yunqian Wang
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Yongli Chen
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Chaoyue Hu
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Dandan Liang
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Li Li
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Yi Liu
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Jun Li
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
| | - Yi-Han Chen
- From the Institute of Medical Genetics (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Heart Health Center (D.S., M.Q., L.Z., X.L., L.N., C.L., T.Y., Y.W., Y.C., C.H., D.L., L.I., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai.,Key Laboratory of Arrhythmias of the Ministry of Education of China (D.S., L.Z., X.L., L.N., T.Y., C.H., D.L., L.L., Y.L., J.L., Y.-H.C.), East Hospital, Tongji University School of Medicine, Shanghai
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