Opening of Cx43-formed hemichannels mediates the Ca2+ signaling associated with endothelial cell migration

Biology Direct

Research

Xavier F. Figueroa¹  Hilda Espinoza² 

[1] Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, 8330025, Santiago, Chile;Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, 8330025, Santiago, Chile;Escuela de Medicina, Facultad de Ciencias de la Salud, Universidad del Alba, 8370007, Santiago, Chile;

关键词: Endothelial cells;    Migration;    Angiogenesis;    Ca signaling;    Connexin hemichannels;   

DOI  :  10.1186/s13062-023-00408-3

 received in 2023-06-09, accepted in 2023-08-19,  发布年份 2023

来源: Springer

【 摘 要 】

Endothelial cell migration is a key process in angiogenesis. Progress of endothelial cell migration is orchestrated by coordinated generation of Ca2+ signals through a mechanism organized in caveolar microdomains. Connexins (Cx) play a central role in coordination of endothelial cell function, directly by cell-to-cell communication via gap junction and, indirectly, by the release of autocrine/paracrine signals through Cx-formed hemichannels. However, Cx hemichannels are also permeable to Ca2+ and Cx43 can be associated with caveolin-1, a structural protein of caveolae. We proposed that endothelial cell migration relies on Cx43 hemichannel opening. Here we show a novel mechanism of Ca2+ signaling in endothelial cell migration. The Ca2+ signaling that mediates endothelial cell migration and the subsequent tubular structure formation depended on Cx43 hemichannel opening and is associated with the translocation of Cx43 with caveolae to the rear part of the cells. These findings indicate that Cx43 hemichannels play a central role in endothelial cell migration and provide new therapeutic targets for the control of deregulated angiogenesis in pathological conditions such as cancer.

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

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