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[Recent advances in the research on histamine release]
1Department of Pharmacology, Faculty of Pharmaceutical Sciences, Okayama University, Japan.
Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
|September 1, 1991
Summary
Inositol 1, 4, 5-trisphosphate (IP3) triggers calcium release from the endoplasmic reticulum in rat mast cells, leading to histamine release. Microtubules are involved in this calcium release process.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Context:
- Mast cells play a crucial role in allergic reactions and inflammation.
- Histamine release from mast cells is a key event in allergic responses.
- Intracellular calcium (Ca2+) signaling is fundamental to mast cell activation.
Purpose:
- To elucidate the mechanisms of calcium (Ca2+) release and histamine release from rat mast cells.
- To identify the intracellular calcium stores and the signaling molecules involved.
- To investigate the role of microtubules and microfilaments in mast cell degranulation.
Summary:
- Inositol 1, 4, 5-trisphosphate (IP3) formation precedes intracellular Ca2+ elevation, triggering histamine release in rat mast cells.
- The endoplasmic reticulum (ER) serves as the intracellular Ca2+ store, with IP3 and GTP effectively releasing Ca2+ from isolated ER.
- Microtubules are implicated in Ca2+ release and subsequent histamine release, while microfilaments are involved in granule extrusion and reincorporation.
Impact:
- This research clarifies the signaling pathways governing mast cell activation and histamine release.
- Understanding these mechanisms can inform the development of novel anti-allergic and anti-inflammatory therapies.
- The study highlights the complex interplay between intracellular signaling, cytoskeletal dynamics, and neuropeptide/protein-mediated mast cell responses.