Mast Cells as Sources of Tissue Histamine

Abstract

Enumeration of mast cells and determination of histamine in sections of dog skin and dog lung have shown that the regions of the tissue rich in mast cells are also rich in histamine. In the skin, the outer layers of the dermis contain higher concentrations of histamine and mast cells than any other region. Average values of the histamine content and mast cell count for dog liver, heart, muscle, and kidney, and for beef liver parenchyma and capsule, also exhibit a positive relationship between these two parameters, although the amount of histamine found per mast cell varied from 7 µµg. in dog skin to 32 µµg. in beef liver capsule. When the size of the mast cells was taken into account, the intracellular concentration of histamine was found to be of the same order (about 0.4 molar) for all the tissues examined except skin and kidney. In both dog skins analyzed, the intracellular concentration was about 0.1 molar. In kidney both mast cell and histamine values were too low for accurate estimation. The concentration of histamine in the mast cells investigated was much greater than the concentration in human basophils, the blood elements richest in histamine. The mechanism of the localization of histamine in mast cells is briefly considered.

Contents of aprotinin, heparin and histamine in mast cells from bovine liver capsule

“…The value of histamine coincides with that reported by GRAHA~a et al (32.2 + 2.4 pg/mast cell, mean _+ S.D.) [11]. Whereas Riley reported values of 18 and 25 pg histamine/mast cell in calf and ox liver capsule [12].…”

Allergic asthma in childhood.

“…The mast cells are especially important in this respect. Specifically sensitized mast cells are degranulated by the allergic reaction, and histamine, bradykinin, and other transmitter substances are liberated (Graham et al, 1955;Katz and Cohen, 1941;Keller, 1966;Middleton, 1959). Slow-reacting substance A (SRS-A) is among the substances that are liberated in sensitized lung tissues by allergic reactions, but it is uncertain whether or not it origin- (1) spasm of smooth muscle, (2) oedema of mucosa, (3) increased secretion of viscidfluid, and (4) forced expiration to compensate for combination of factors 1, 2, and 3, causing increased external pressure on bronchi and bronchioles.…”

Distribution of mast cells in human dermis: development of a mapping technique

“…Several workers have observed that mast cell population density varies considerably, not only between species and between difFerent tissues in the same species, but also from one region to another in the same tissue (Hellstrom & Holmgren, 1950;Riley & West, 1953, 1956Graham et al, 1955;Binazzi & Rampichini, 1959).…”