Please use this identifier to cite or link to this item: https://repositorio.uca.edu.ar/handle/123456789/8761
Título : Store-operated interactions between plasmalemmal STIM1 and TRPC1 proteins stimulate PLCβ1 to induce TRPC1 channel activation in vascular smooth muscle cells
Autor : Shi, Jian 
Miralles, Francesc 
Birnbaumer, Lutz 
Large, William A. 
Albert, Anthony P. 
Palabras clave : MALFORMACIONES VASCULARESMUSCULOSPROTEINASCALCIOMARCADORES BIOLOGICOS
Fecha de publicación : 2017
Editorial : Wiley
Cita : Shi J, Miralles F, Birnbaumer L, Large WA, Albert AP. Store-operated interactions between plasmalemmal STIM1 and TRPC1 proteins stimulate PLCβ1 to induce TRPC1 channel activation in vascular smooth muscle cells [en línea]. The Journal of Physiology. 2017;595(4):1039-1058. doi:10.1113/JP273302 Disponible en: https://repositorio.uca.edu.ar/handle/123456789/8761
Resumen : Abstract: Depletion of Ca2+ stores activates store-operated channels (SOCs), which mediate Ca2+ entry pathways that regulate cellular processes such as contraction, proliferation and gene expression. In vascular smooth muscle cells (VSMCs), stimulation of SOCs composed of canonical transient receptor potential channel 1 (TRPC1) proteins requires G protein α q subunit (Gαq)/phospholipase C (PLC)β1/protein kinase C (PKC) activity. We studied the role of stromal interaction molecule 1 (STIM1) in coupling store depletion to this activation pathway using patch clamp recording, GFP-PLCδ1-PH imaging and co-localization techniques. Store-operated TRPC1 channel and PLCβ1 activities were inhibited by STIM1 short hairpin RNA (shRNA) and absent in TRPC1-/- cells, and store-operated PKC phosphorylation of TRPC1 was inhibited by STIM1 shRNA. Store depletion induced interactions between STIM1 and TRPC1, Gαq and PLCβ1, which required STIM1 and TRPC1. Similar effects were produced with noradrenaline. These findings identify a new activation mechanism of TRPC1-based SOCs in VSMCs, and a novel role for STIM1, where store-operated STIM1-TRPC1 interactions stimulate Gαq/PLCβ1/PKC activity to induce channel gating.
URI : https://repositorio.uca.edu.ar/handle/123456789/8761
ISSN : 0022-3751 (impreso)
1469-7793 (online)
Disciplina: MEDICINA
DOI: 10.1113/JP273302
Derechos: Acceso abierto
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