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Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation

L-type Ca(V)1.2 channels undergo cooperative gating to regulate cell function, although mechanisms are unclear. This study tests the hypothesis that phosphorylation of the Ca(V)1.2 pore-forming subunit α1(C) at S1928 mediates vascular Ca(V)1.2 cooperativity during diabetic hyperglycemia. METHODS: A...

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Autores principales: Martín-Aragón Baudel, Miguel, Flores-Tamez, Victor A., Hong, Junyoung, Reddy, Gopyreddy R., Maillard, Pauline, Burns, Abby E., Man, Kwun Nok Mimi, Sasse, Kent C., Ward, Sean M., Catterall, William A., Bers, Donald M., Hell, Johannes W., Nieves-Cintrón, Madeline, Navedo, Manuel F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Lippincott Williams & Wilkins 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9722584/
https://www.ncbi.nlm.nih.gov/pubmed/36345826
http://dx.doi.org/10.1161/CIRCRESAHA.122.321479
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author Martín-Aragón Baudel, Miguel
Flores-Tamez, Victor A.
Hong, Junyoung
Reddy, Gopyreddy R.
Maillard, Pauline
Burns, Abby E.
Man, Kwun Nok Mimi
Sasse, Kent C.
Ward, Sean M.
Catterall, William A.
Bers, Donald M.
Hell, Johannes W.
Nieves-Cintrón, Madeline
Navedo, Manuel F.
author_facet Martín-Aragón Baudel, Miguel
Flores-Tamez, Victor A.
Hong, Junyoung
Reddy, Gopyreddy R.
Maillard, Pauline
Burns, Abby E.
Man, Kwun Nok Mimi
Sasse, Kent C.
Ward, Sean M.
Catterall, William A.
Bers, Donald M.
Hell, Johannes W.
Nieves-Cintrón, Madeline
Navedo, Manuel F.
author_sort Martín-Aragón Baudel, Miguel
collection PubMed
description L-type Ca(V)1.2 channels undergo cooperative gating to regulate cell function, although mechanisms are unclear. This study tests the hypothesis that phosphorylation of the Ca(V)1.2 pore-forming subunit α1(C) at S1928 mediates vascular Ca(V)1.2 cooperativity during diabetic hyperglycemia. METHODS: A multiscale approach including patch-clamp electrophysiology, super-resolution nanoscopy, proximity ligation assay, calcium imaging‚ pressure myography, and Laser Speckle imaging was implemented to examine Ca(V)1.2 cooperativity, α1(C) clustering, myogenic tone, and blood flow in human and mouse arterial myocytes/vessels. RESULTS: Ca(V)1.2 activity and cooperative gating increase in arterial myocytes from patients with type 2 diabetes and type 1 diabetic mice, and in wild-type mouse arterial myocytes after elevating extracellular glucose. These changes were prevented in wild-type cells pre-exposed to a PKA inhibitor or cells from knock-in S1928A but not S1700A mice. In addition, α1(C) clustering at the surface membrane of wild-type, but not wild-type cells pre-exposed to PKA or P2Y(11) inhibitors and S1928A arterial myocytes, was elevated upon hyperglycemia and diabetes. Ca(V)1.2 spatial and gating remodeling correlated with enhanced arterial myocyte Ca(2+) influx and contractility and in vivo reduction in arterial diameter and blood flow upon hyperglycemia and diabetes in wild-type but not S1928A cells/mice. CONCLUSIONS: These results suggest that PKA-dependent S1928 phosphorylation promotes the spatial reorganization of vascular α1(C) into “superclusters” upon hyperglycemia and diabetes. This triggers Ca(V)1.2 activity and cooperativity, directly impacting vascular reactivity. The results may lay the foundation for developing therapeutics to correct Ca(V)1.2 and arterial function during diabetic hyperglycemia.
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spelling pubmed-97225842022-12-28 Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation Martín-Aragón Baudel, Miguel Flores-Tamez, Victor A. Hong, Junyoung Reddy, Gopyreddy R. Maillard, Pauline Burns, Abby E. Man, Kwun Nok Mimi Sasse, Kent C. Ward, Sean M. Catterall, William A. Bers, Donald M. Hell, Johannes W. Nieves-Cintrón, Madeline Navedo, Manuel F. Circ Res Original Research L-type Ca(V)1.2 channels undergo cooperative gating to regulate cell function, although mechanisms are unclear. This study tests the hypothesis that phosphorylation of the Ca(V)1.2 pore-forming subunit α1(C) at S1928 mediates vascular Ca(V)1.2 cooperativity during diabetic hyperglycemia. METHODS: A multiscale approach including patch-clamp electrophysiology, super-resolution nanoscopy, proximity ligation assay, calcium imaging‚ pressure myography, and Laser Speckle imaging was implemented to examine Ca(V)1.2 cooperativity, α1(C) clustering, myogenic tone, and blood flow in human and mouse arterial myocytes/vessels. RESULTS: Ca(V)1.2 activity and cooperative gating increase in arterial myocytes from patients with type 2 diabetes and type 1 diabetic mice, and in wild-type mouse arterial myocytes after elevating extracellular glucose. These changes were prevented in wild-type cells pre-exposed to a PKA inhibitor or cells from knock-in S1928A but not S1700A mice. In addition, α1(C) clustering at the surface membrane of wild-type, but not wild-type cells pre-exposed to PKA or P2Y(11) inhibitors and S1928A arterial myocytes, was elevated upon hyperglycemia and diabetes. Ca(V)1.2 spatial and gating remodeling correlated with enhanced arterial myocyte Ca(2+) influx and contractility and in vivo reduction in arterial diameter and blood flow upon hyperglycemia and diabetes in wild-type but not S1928A cells/mice. CONCLUSIONS: These results suggest that PKA-dependent S1928 phosphorylation promotes the spatial reorganization of vascular α1(C) into “superclusters” upon hyperglycemia and diabetes. This triggers Ca(V)1.2 activity and cooperativity, directly impacting vascular reactivity. The results may lay the foundation for developing therapeutics to correct Ca(V)1.2 and arterial function during diabetic hyperglycemia. Lippincott Williams & Wilkins 2022-11-08 2022-12-02 /pmc/articles/PMC9722584/ /pubmed/36345826 http://dx.doi.org/10.1161/CIRCRESAHA.122.321479 Text en © 2022 The Authors. https://creativecommons.org/licenses/by-nc-nd/4.0/Circulation Research is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial-NoDerivs (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited, the use is noncommercial, and no modifications or adaptations are made.
spellingShingle Original Research
Martín-Aragón Baudel, Miguel
Flores-Tamez, Victor A.
Hong, Junyoung
Reddy, Gopyreddy R.
Maillard, Pauline
Burns, Abby E.
Man, Kwun Nok Mimi
Sasse, Kent C.
Ward, Sean M.
Catterall, William A.
Bers, Donald M.
Hell, Johannes W.
Nieves-Cintrón, Madeline
Navedo, Manuel F.
Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation
title Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation
title_full Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation
title_fullStr Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation
title_full_unstemmed Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation
title_short Spatiotemporal Control of Vascular Ca(V)1.2 by α1(C) S1928 Phosphorylation
title_sort spatiotemporal control of vascular ca(v)1.2 by α1(c) s1928 phosphorylation
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9722584/
https://www.ncbi.nlm.nih.gov/pubmed/36345826
http://dx.doi.org/10.1161/CIRCRESAHA.122.321479
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