By Ann M. Dvorak

ISBN-10: 1475795254

ISBN-13: 9781475795257

ISBN-10: 1475795270

ISBN-13: 9781475795271

Basophils and mast cells are related yet designated secretory cells with a well-documented function in immediate-hypersensitivity reactions. The presence of those cells in a variety of phone­ mediated allergic reaction reactions, in tissues of a number of ailments, and as an element of the host response to damage and service in several conditions is celebrated. liberate of kept and newly generated mediators of irritation from basophils and mast cells contributes to the cascade of pathogenetic occasions in situations below which those unlock reactions take place. regardless of insights bought via reports of those pathologic occasions, the function of basophils and mast cells and their secretory items in well-being isn't identified. during this booklet, I evaluation a lot of the structural information about basophils and mast cells of a number of species. Ultrastructural reports of rat mast cells traditionally precede and quantitatively exceed comparable experiences of basophils and mast cells of different species. for this reason, I first overview those history reviews as an entity. Then I speak about the contents of 2 well known organelles-granules and lipid bodies-in basophils and mast cells of a number of species. The ultrastructural morphology of basophils and mast cells in 3 species is gifted intimately to set up acceptable guidance for his or her popularity and to supply normal principles for research that are applicable for the id of those cells in different species as well.

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Extra resources for Basophil and Mast Cell Degranulation and Recovery

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The remaining cytoplasmic granule (open arrowhead) is ANAE negative. Note the strong ANAE ectoenzyme on the plasma membrane and the degranulation sac membrane (closed arrowhead). lm. , FIGURE 15. Membrane-free guinea pig basophil granules 12 hr after degranulation . The granules are heavily labeled with silver grains as a result of exposure to [3H]DFP. Lm. From A. M . Dvorak eta/. (1987b) with permission. M. Dvorak, 1988a; A. M. Dvorak et al. , 1972a, 1980b, 1985c,d; Dvorak and Dvorak, 1975; Murata, 1969).

Histamine, a rapidly solubilized small molecule , could readily exit from the cell when the large granules could not, thus explaining this apparent nonparallel release event. During the studies with highly purified guinea pig basophils, we also established that plasminogen activator (PA) activity of these cells was not a granuleassociated protein (H. F. , 1978). Rather, this activity could be released from cells by trypsin, was associated only with fractions containing membranes , and was expressed only by living cells (H.

These investigators found a substantial decrease in cell volume at 8 days, associated with a reduction in granule volume. , 1989). Between 8 and 34 days, the cell volume and granule volume increased. Cell volume increases antedated granule volume increases, suggesting cell expansion with synthetic structures prior to granule reconstitution. At 34 days, although the original number of granules had been reconstituted, the granule aggregate volume had not yet reached control levels. The volume of the Golgi apparatus increased early after degranulation, but then Rat Mast Cells 25 receded.

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Basophil and Mast Cell Degranulation and Recovery by Ann M. Dvorak


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