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Interleukin-3 or immunoglobulin E promotes expression of protein kinase C delta gene in murine mast cells

H M Kim1, S G Ko, J J Kim

  • 1College of Pharmacy, Wonkwang University, Iksan, Chonbuk, 570-749, South Korea.

Pharmacological Research
|August 6, 1999
PubMed

Insights

Mast cell activation, triggered by interleukin-3 (IL-3) or immunoglobulin E (IgE), significantly increases protein kinase C delta (PKCdelta) gene expression. This finding highlights PKCdelta

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • Protein kinase C delta (PKCdelta) is identified as a key isoenzyme in murine mast cells.
  • Understanding the regulation of PKCdelta expression is crucial for mast cell function research.

Purpose of the Study:

  • To investigate the regulatory mechanisms controlling PKCdelta gene expression in murine mast cells.
  • To examine PKCdelta mRNA expression in response to specific mast cell activators in vitro and in vivo.

Main Methods:

  • Utilized mouse mastocytoma P-815 cells for in vitro studies.
  • Employed in situ hybridization with an antisense riboprobe to detect PKCdelta mRNA in skin during passive cutaneous anaphylaxis.
  • Assessed mRNA expression levels in response to interleukin-3 (IL-3) and immunoglobulin E (IgE).

Main Results:

  • Interleukin-3 (IL-3) and immunoglobulin E (IgE) stimulation promoted PKCdelta mRNA expression in P-815 cells.
  • In vivo analysis confirmed the presence of PKCdelta mRNA in mast cells during an IgE-dependent passive cutaneous anaphylaxis reaction.
  • Mast cell activation demonstrably increased steady-state levels of PKCdelta mRNA.

Conclusions:

  • Mast cell activation significantly upregulates PKCdelta gene expression.
  • PKCdelta plays a role in activated mast cells, with its expression levels modulated by common signaling pathways.
  • These findings contribute to understanding the molecular basis of mast cell responses.

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