Ultrastructural changes associated with K+-evoked peptide secretion from a neurohemal organ of the crab, Cardisoma carnifex

Electron-microscopic comparison of K+-stimulated and unstimulated crab sinus glands reveals significant differences in neurosecretory terminal morphology. Sinus glands exposed to elevated K+ saline for increasing periods of time show increasing numbers of exocytotic release profiles, vacuoles, and m...

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Bibliographic Details
Published inCell and tissue research Vol. 242; no. 1; p. 67
Main Authors Weatherby, T M, Haylett, B A
Format Journal Article
LanguageEnglish
Published Germany 01.01.1985
Subjects
Animals
Brachyura
Invertebrate Hormones - metabolism
Male
Microscopy, Electron
Nerve Tissue Proteins - metabolism
Neurosecretory Systems - metabolism
Neurosecretory Systems - ultrastructure
Oligopeptides - metabolism
Potassium - pharmacology
Pyrrolidonecarboxylic Acid - analogs & derivatives
Time Factors
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Summary:Electron-microscopic comparison of K+-stimulated and unstimulated crab sinus glands reveals significant differences in neurosecretory terminal morphology. Sinus glands exposed to elevated K+ saline for increasing periods of time show increasing numbers of exocytotic release profiles, vacuoles, and multilamellate bodies, and a decrease in the number of microvesicles within 10 micron of release sites. These morphological changes are well correlated with secretion of red-pigment-concentrating hormone, as determined by bioassay of perfusate from the individual preparations.
ISSN:0302-766X
DOI:10.1007/BF00225564