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IP3 receptor signaling and endothelial barrier function.

Mitchell Y Sun1, Melissa Geyer1, Yulia A Komarova2

  • 1Department of Pharmacology and The Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago, IL, 60612, USA.

Cellular and Molecular Life Sciences : CMLS
|August 14, 2017
PubMed
Summary
This summary is machine-generated.

Endothelial cells control vascular tone and permeability using calcium ion (Ca2+) signals. Inositol 1,4,5-trisphosphate receptors (IP3Rs) form clusters that amplify these critical Ca2+ signals.

Keywords:
End-binding protein 3Endothelial permeabilityMicrotubule cytoskeletonReceptor dynamicsSignal transduction

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Area of Science:

  • Cell Biology
  • Physiology
  • Biochemistry

Background:

  • The endothelium maintains tissue-fluid homeostasis by regulating passage of plasma proteins and blood cells.
  • Calcium ions (Ca2+) act as crucial secondary messengers in endothelial cells, controlling vascular tone and permeability.
  • Intracellular Ca2+ release is mediated by inositol 1,4,5-trisphosphate receptors (IP3Rs) located in the endoplasmic reticulum.

Purpose of the Study:

  • To review emerging concepts on the architecture and dynamics of IP3 receptor clusters.
  • To elucidate the specific role of IP3 receptor clusters in Ca2+ signal propagation within endothelial cells.

Main Methods:

  • Literature review of current research on IP3 receptor clusters and Ca2+ signaling in endothelial cells.

Main Results:

  • IP3 binding to IP3Rs triggers the assembly of IP3R clusters.
  • IP3R cluster formation is a key mechanism for amplifying Ca2+ signals in endothelial cells.
  • The architecture and dynamics of these clusters influence Ca2+ signal propagation.

Conclusions:

  • IP3 receptor clusters play a vital role in regulating Ca2+ signaling dynamics in the endothelium.
  • Understanding IP3R cluster behavior is essential for comprehending endothelial cell function and vascular homeostasis.