Atlas One · Host Biology · Scale 04 — Cellular

Mast Cell

Tissue-resident innate immune cells with electron-dense metachromatic granules. IgE-FcεRI crosslinking triggers rapid degranulation releasing histamine, tryptase, leukotrienes, and PGD2. Central to type I hypersensitivity, allergic asthma, and host defence against parasites.

Also known as: mastocyte, tissue mast cell, connective tissue mast cell, mucosal mast cell, MC

Scale 04 — CellularScale
draftStatus
2026-06-05Last Reviewed
This is an auto-generated stub page built from atlas entry frontmatter. A richer hand-crafted page is planned. See the atlas source for the full entry including detailed body sections.
mast-cell

Mast Cell

Tissue-resident innate immune cells with electron-dense metachromatic granules. IgE-FcεRI crosslinking triggers rapid degranulation releasing histamine, tryptase, leukotrienes, and PGD2. Central to type I hypersensitivity, allergic asthma, and host defence against parasites.