Journal ArticleDOI
On the presence of conspicuous electron dense bodies in the pinealocytes of the pig
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The pinealocytes of the pig contain a large number of aldehydefuchsin positive granules, and their morphological appearance strongly suggests that they belong to the lysosomal system.Abstract:
The pinealocytes of the pig contain a large number of aldehydefuchsin positive granules In order to determine their nature an ultrastructural study was carried out Numerous bodies having a maximal diameter of about 1,600 nm were found These elements showed a great variety of internal structure, ranging from a “homogeneous” content and amorphous dense aggregates to lamellate bodies Although only a few of them displayed a positive reaction for acid phosphatase, their morphological appearance strongly suggests that they belong to the lysosomal systemread more
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Pools of serotonin in the pineal gland of the mouse: the mammalian pinealocyte as a component of the diffuse neuroendocrine system.
TL;DR: The distribution of serotonin (5-HT) and its eventual relationships to a protein secretion were examined by means of fluorescence histochemical and ultracytochemical methods andYellow formaldehyde-induced fluorophores, characteristic of high concentrations of 5-HT, were found in pinealocytes, interstitial cells and sympathetic adrenergic nerve endings.
Journal ArticleDOI
Cell types in the pineal gland of the horse: an ultrastructural and immunocytochemical study.
TL;DR: Morphological and immunocytochemical features support classifying them as astrocytes, probably protoplasmic, and the presence of a cavity lined with pericytes is a consistent finding and may relate to the third ventricle.
Journal ArticleDOI
The ultrastructure of mammalian pinealocytes: a systematic investigation.
TL;DR: Whereas sufficient structural information now exists on cytoplasmic organelles such as synaptic ribbons and spherules, annulate lamellae, subsurface cisterns, and the several types of synaptic arrangements seen in relation to the pinealocyte soma and its processes, the functional role of these structures in pineal synthetic processes remains to be elucidated.
Journal ArticleDOI
Oogenesis at subzero temperatures: a comparative study of the oocyte morphology in nine species of Notothenioids.
TL;DR: Oogenesis was examined in nine species of Antarctic fish to verify the existence of morphological peculiarities and reveal significant specie-specific differences that could be partly correlated to the phylogenetic radiation but not to the peculiar environmental conditions being essentially comparable to those observed among temperate species.
Journal ArticleDOI
The ultrastructure of pinealocytes in the pig.
M. Karasek,Z. Wyrzykowski +1 more
TL;DR: Pinealocytes of female pigs were studied electron-microscopically and compared with those of other mammals to find out the role of dense-cored vesicles and membrane-bounded bodies in secretory processes of pinealocytes.
References
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A formaldehyde-glutaraldehyde fixative of high osmolality for use in electron-microscopy
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A formaldehyde - glutaraldehyde fixative of high osmolarity for use in electron microscopy
Journal ArticleDOI
Histochemical methods for acid phosphatase using hexazonium pararosanilin as coupler
Tibor Barka,Paul J. Anderson +1 more
TL;DR: ‘[he use of freslsbv diazotizecl pararosanilin w-itim a-msaphthyb pisosphate its a sinmultaneous coupling azo dye method for acid phosphatase resulted in significant improveumment because of the nmaumy desirable characteristics of the final azo dyed (1, 2).
Journal ArticleDOI
Lysosome function in the regulation of the secretory process in cells of the anterior pituitary gland.
TL;DR: In secretory cells, lysosomes function in the regulation of the secretory process by providing a mechanism which takes care of overproduction of secretory products.