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ORAI-mediated calcium entry: mechanism and roles, diseases and pharmacology

Sarah J Roberts-Thomson1, Amelia A Peters, Desma M Grice

  • 1The University of Queensland, School of Pharmacy, Brisbane, 4072, Australia. sarahrt@uq.edu.au

Pharmacology & Therapeutics
|June 16, 2010
PubMed

Insights

Store-operated calcium entry, mediated by ORAI and STIM proteins, replenishes cellular calcium stores. This pathway is crucial for cellular functions and implicated in diseases like cancer.

Area of Science:

  • Molecular Biology
  • Cell Physiology

Background:

  • ORAI1 functions as a plasma membrane calcium channel, replenishing endoplasmic reticulum calcium stores.
  • STIM1 senses calcium store depletion, initiating store-operated calcium entry.
  • ORAI and STIM protein families are key regulators of cellular calcium homeostasis.

Purpose of the Study:

  • To review ORAI-mediated calcium entry.
  • To discuss the physiological and pathophysiological roles of ORAI proteins.
  • To explore pharmacological modulators of ORAI-mediated calcium entry.

Main Methods:

  • Literature review of ORAI and STIM protein functions.
  • Analysis of studies on calcium signaling pathways.
  • Examination of disease-associated roles of ORAI-mediated calcium entry.

Main Results:

  • ORAI and STIM proteins were identified as key components of store-operated calcium entry.
  • These proteins regulate diverse cellular processes including gene transcription and immune cell function.
  • ORAI-mediated calcium entry is implicated in breast cancer cell migration and thrombus formation.

Conclusions:

  • ORAI-mediated calcium entry is a vital pathway for cellular calcium regulation.
  • Dysregulation of this pathway contributes to significant pathophysiological processes.
  • Pharmacological targeting of ORAI components offers potential therapeutic strategies.

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