|
1
|
Chen GL, Zeng B, Jiang H, Daskoulidou N, Saurabh R, Chitando RJ, Xu SZ. Ca 2+ Influx through TRPC Channels Is Regulated by Homocysteine-Copper Complexes. Biomolecules 2023; 13:952. [PMID: 37371532 DOI: 10.3390/biom13060952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/15/2023] [Accepted: 05/17/2023] [Indexed: 06/29/2023] Open
Abstract
An elevated level of circulating homocysteine (Hcy) has been regarded as an independent risk factor for cardiovascular disease; however, the clinical benefit of Hcy lowering-therapy is not satisfying. To explore potential unrevealed mechanisms, we investigated the roles of Ca2+ influx through TRPC channels and regulation by Hcy-copper complexes. Using primary cultured human aortic endothelial cells and HEK-293 T-REx cells with inducible TRPC gene expression, we found that Hcy increased the Ca2+ influx in vascular endothelial cells through the activation of TRPC4 and TRPC5. The activity of TRPC4 and TRPC5 was regulated by extracellular divalent copper (Cu2+) and Hcy. Hcy prevented channel activation by divalent copper, but monovalent copper (Cu+) had no effect on the TRPC channels. The glutamic acids (E542/E543) and the cysteine residue (C554) in the extracellular pore region of the TRPC4 channel mediated the effect of Hcy-copper complexes. The interaction of Hcy-copper significantly regulated endothelial proliferation, migration, and angiogenesis. Our results suggest that Hcy-copper complexes function as a new pair of endogenous regulators for TRPC channel activity. This finding gives a new understanding of the pathogenesis of hyperhomocysteinemia and may explain the unsatisfying clinical outcome of Hcy-lowering therapy and the potential benefit of copper-chelating therapy.
Collapse
Affiliation(s)
- Gui-Lan Chen
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Bo Zeng
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Hongni Jiang
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Nikoleta Daskoulidou
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Rahul Saurabh
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Rumbidzai J Chitando
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Shang-Zhong Xu
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
- Diabetes, Endocrinology and Metabolism, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| |
Collapse
|
|
2
|
Thilo F, Vorderwülbecke BJ, Marki A, Krueger K, Liu Y, Baumunk D, Zakrzewicz A, Tepel M. Pulsatile Atheroprone Shear Stress Affects the Expression of Transient Receptor Potential Channels in Human Endothelial Cells. Hypertension 2012; 59:1232-40. [DOI: 10.1161/hypertensionaha.111.183608] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Florian Thilo
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Bernd J. Vorderwülbecke
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Alex Marki
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Katharina Krueger
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Ying Liu
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Daniel Baumunk
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Andreas Zakrzewicz
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| | - Martin Tepel
- From the Department of Nephrology (F.T., K.K.) and Shear Stress and Vascular Biology Research Group, Institute of Physiology (B.J.V., A.M., A.Z.), Charité Campus Benjamin Franklin, Berlin, Germany; Institute of Molecular Medicine, Cardiovascular and Renal Research (Y.L., M.T.), Institute of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Department of Urology (Y.L.), Tenth People's Hospital, Tongji University, Shanghai, China; Department of Urology
| |
Collapse
|