ISSN:
1432-0878
Keywords:
Secretion
;
Calcium adenosine triphosphatase
;
Cytochemistry
;
Proventriculus
;
Mucous cells
;
Oxyntico-peptic cells, avian
;
Domestic fowl
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Calcium adenosine triphosphatase (Ca2+-ATPase) was localized by means of histo- and ultracytochemistry in the secretory cells of the proventriculus of the domestic fowl. The mucous cells exhibited plasmalemmal-associated enzyme activity on the external aspect of the basolateral cell membrane. Intracellularly, the luminal aspect of Golgi-membranes and of secretory vesicle membranes reacted positively for Ca2+-ATPase activity, as did the apical cytosol and the matrix of lysosomes. Oxyntico-peptic cells were characterized by apical and apico-lateral plasmalemmal activity and by an organelle-associated distributional pattern similar to that in the mucous cells. In addition, Ca2+-ATPase was associated either with the matrix of mitochondria or with tubuli of the rough-surfaced endoplasmic reticulum. The results are discussed with respect to messenger and effector functions of calcium in the process of proventricular mucus secretion. In addition, Ca2+-ATPase distributional patterns in the oxyntico-peptic cell are related to the unique structure and function of these cells.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00645051
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