Catecholamine containing granules
نویسندگان
چکیده
منابع مشابه
Exocytosis of catecholamine (CA)-containing and CA-free granules in chromaffin cells.
Recent evidence suggests that endocytosis in neuroendocrine cells and neurons can be tightly coupled to exocytosis, allowing rapid retrieval from the plasma membrane of fused vesicles for future use. This can be a much faster mechanism for membrane recycling than classical clathrin-mediated endocytosis. During a fast exo-endocytotic cycle, the vesicle membrane does not fully collapse into the p...
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We have used an aequorin chimera targeted to the membrane of the secretory granules to monitor the free [Ca(2+)] inside them in neurosecretory PC12 cells. More than 95% of the probe was located in a compartment with an homogeneous [Ca(2+)] around 40 microM. Cell stimulation with either ATP, caffeine or high-K(+) depolarization increased cytosolic [Ca(2+)] and decreased secretory granule [Ca(2+)...
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Giant granules ( 1 sm in diameter), Auer rods, and unique giant granules that contained crystalloid material were investigated in monoblasts from a patient with acute monocytic leukemia using ultrastructural and cytochemical techniques. The latter granule type differed from abnormal granules previously described in leukocytes. In Wright’s stained preparations, these granules appeared to be crys...
متن کاملHeterogeneity of catecholamine-containing vesicles in PC12 cells.
Vesicular catecholamine release has been measured amperometrically from undifferentiated rat PC12 cells using carbon fiber microelectrodes. During superfusion with high K(+) saline, vesicular release was detected from approximately 50% of 200 cells investigated. On repeated stimulation the releasable pool of vesicles is rapidly depleted, while vesicle contents remains constant. Vesicular catech...
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ژورنال
عنوان ژورنال: Japanese Journal of Pharmacology
سال: 1976
ISSN: 0021-5198
DOI: 10.1016/s0021-5198(19)65886-5