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Investigating Mast Cell Secretory Granules; from Biosynthesis to Exocytosis
Published on: January 26, 2015
The mast cell in wound healing
1Studio Dermatologico Veterinario, Via Sismondi 62, 20133 Milano, Italy. pitnoli@iol.it
Insights
Mast cells play a crucial role in skin healing by releasing mediators that control inflammation, cell proliferation, and tissue remodeling. Dysregulation of mast cell mediators can lead to impaired wound repair.
Area of Science:
- Veterinary Dermatology
- Wound Healing Biology
Background:
- Mast cells are key immune cells involved in inflammatory and repair processes.
- Their specific role in skin healing, particularly in domestic animals, requires detailed examination.
Purpose of the Study:
- To review the function of mast cells in the pathobiology of skin healing.
- To elucidate the mast cell's involvement across all phases of skin repair in dogs and cats.
Main Methods:
- Review of existing literature on mast cell function and skin healing.
- Analysis of mast cell mediators and their impact on wound repair phases.
Main Results:
- Activated mast cells, via mediator degranulation, orchestrate key healing events.
- These events include initiating and modulating inflammation, promoting connective tissue proliferation, and remodeling the extracellular matrix.
- Imbalances in mast cell mediator release result in abnormal healing, such as hypertrophic scars, delayed closure, and chronic inflammation.
Conclusions:
- Mast cells are critical regulators of skin healing processes.
- Proper mast cell function and mediator balance are essential for successful wound repair.
Abstract:
This review describes the role of the mast cell in the pathobiology of skin healing. After illustrating its main morphofunctional characteristics, with special reference to the dog and cat, we consider the involvement of the mast cell in the various phases of skin repair. With the aid of a wide array of newly formed or preformed mediators released by degranulation, the activated mast cell controls the key events of the healing phases: triggering and modulation of the inflammatory stage, proliferation of connective cellular elements and final remodelling of the newly formed connective tissue matrix. The importance of the mast cell in regulating healing processes is also demonstrated by the fact that a surplus or deficit of degranulated biological mediators causes impaired repair, with the formation of exuberant granulation tissue (e.g. keloids and hypertrophic scars), delayed closure (dehiscence) and chronicity of the inflammatory stage.
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