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Single-molecule Super-resolution Imaging of Phosphatidylinositol 4,5-bisphosphate in the Plasma Membrane with Novel Fluorescent Probes
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Published on: October 15, 2016

Distribution of inositol 1,4,5-trisphosphate receptor mRNA in mouse tissues

T Furuichi1, C Shiota, K Mikoshiba

  • 1Division of Behavior and Neurobiology, National Institute for Basic Biology, Okazaki, Japan.

FEBS Letters
|July 2, 1990
PubMed

Insights

Inositol 1,4,5-triphosphate (IP3) receptor mRNA is most abundant in the cerebellum and smooth muscle cells. This suggests a key role for the IP3 signaling pathway in these tissues.

Area of Science:

  • Molecular Biology
  • Neuroscience
  • Cell Biology

Background:

  • The inositol 1,4,5-triphosphate (IP3) receptor is a crucial component of intracellular calcium signaling.
  • Understanding the distribution of IP3 receptor mRNA provides insights into its functional roles across different tissues.

Purpose of the Study:

  • To determine the tissue-specific expression patterns of inositol 1,4,5-triphosphate (IP3) receptor mRNA.
  • To investigate the regional distribution of IP3 receptor mRNA within various cell types.

Main Methods:

  • Northern blot analysis was employed to quantify IP3 receptor mRNA levels in diverse tissues.
  • In situ hybridization was utilized to examine the precise localization of IP3 receptor mRNA.

Main Results:

  • IP3 receptor mRNA concentration was highest in cerebellar tissue.
  • Moderate levels were detected in non-cerebellar brain tissue, thymus, heart, lung, liver, spleen, kidney, and uterus.
  • Significant IP3 receptor mRNA expression was found in smooth muscle cells (arteries, bronchioles, oviduct, uterus) and ovarian secondary oocytes.

Conclusions:

  • The cerebellum and specific smooth muscle cells exhibit high expression of IP3 receptor mRNA.
  • These findings highlight the potential functional significance of the IP3 second-messenger system in these identified cell types.

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