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Endothelial CRAC Channels.

Olivier Romito1, Mohamed Trebak2

  • 1Department of Pharmacology and Chemical Biology; Vascular Medicine Institute; and UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA.

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Store-operated Ca2+ entry (SOCE) regulates endothelial cell functions. Targeting Orai channels offers a potential therapeutic strategy for vascular diseases by modulating SOCE.

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Area of Science:

  • Cellular Physiology
  • Vascular Biology
  • Calcium Signaling

Background:

  • Store-operated Ca2+ entry (SOCE) is crucial for nonexcitable cells, particularly endothelial cells (ECs).
  • SOCE is mediated by Orai channels interacting with STIM proteins upon ER Ca2+ store depletion.
  • Dysregulation of endothelial SOCE is implicated in vascular disease pathogenesis.

Purpose of the Study:

  • To elucidate the role of SOCE in regulating endothelial cell functions.
  • To explore the therapeutic potential of targeting Orai channels for vascular diseases.

Main Methods:

  • Investigated the mechanism of SOCE activation involving STIM and Orai proteins.
  • Examined the impact of SOCE on EC proliferation, migration, angiogenesis, and barrier permeability.
  • Reviewed evidence linking endothelial SOCE to vascular dysfunction.

Main Results:

  • SOCE is the principal Ca2+ influx pathway in ECs, activated by ER Ca2+ store depletion.
  • SOCE regulates key EC functions vital for vascular health.
  • Evidence supports the link between aberrant SOCE and endothelial dysfunction in vascular pathologies.

Conclusions:

  • SOCE plays a critical role in maintaining endothelial cell function.
  • Targeting Orai channels presents a promising therapeutic avenue for treating vascular diseases.