Results 171 to 180 of about 2,934 (238)

Gap junctions between guinea-pig pinealocytes

Cell and Tissue Research, 1984
In accordance with previous results in rats, belt-like arrangements of fenestrated gap junctions have been found around the collicular segments of pineal cells in the guinea pig. In addition, macular interpinealocyte gap junctions have been observed in this species.
S K, Huang, R, Taugner
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Novel features of hamster pinealocyte ultrastructure

Tissue and Cell, 1974
Abstract Pineal glands from young adult hamsters ( Mesocricetus auratus Water-house) kept on a 12 : 12 light : dark photoperiod were examined by electron microscopy. Ultrastructural features of nuclei, mitochondria, and centrioles that have not been reported previously are presented in this paper.
C D, Bucana, M J, Nadakavukaren, J L, Frehn   +2 more
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Fos-like immunoreactivity in cultured rat pinealocytes

Histochemistry, 1991
The expression of Fos-like proteins in cultured rat pinealocytes was investigated immunocytochemically. Pineal glands of 2-day-old rats were dissociated and maintained in culture for 13 days, the last 24 h deprived of animal sera. The pinealocytes were identified morphologically and by serotonin-immunostaining. Incubations with phorbol dibutyrate (PDBu)
A, Tuulivaara, J, Koistinaho
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The ultrastructure of pinealocytes in the pig

Cell and Tissue Research, 1980
Pinealocytes of female pigs were studied electron-microscopically and compared with those of other mammals. A prominent Golgi apparatus forming dense-cored vesicles was widely dispersed in the cytoplasm of the cell body. A very characteristic feature of the pig pinealocytes was the presence of membrane-bounded bodies showing wide variations in internal
M, Karasek, Z, Wyrzykowski
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The pinealocyte nucleolus

Cell and Tissue Research, 1982
An ultrastructural and morphometric analysis was made of the nucleolar components in pinealocytes of 40 male Fischer rats sampled at eight times in an LD 12:12 photoperiod cycle. Comparisons of results from the eight times showed variation in estimated mean volume of the granular component of +/- 29%, and of the fibrillar component +/- 11%, in relation
G M, Lew, A, Payer, W B, Quay
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Intramitochondrial crystalloids in rat pinealocytes

Cell and Tissue Research, 1982
In the present study the rare occurrence of intramitochondrial crystalloid inclusions in the rat pinealocytes is described. They lie within the mitochondrial matrix and consist of a lattice of moderately electron-dense lines. Intersections at regular intervals form rhomboid-like subunits. The significance of these inclusions is not known.
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Microencapsulation and Culture in Vitro of Rat Pinealocytes

The International Journal of Artificial Organs, 2003
Background Melatonin is a powerful anti-aging reagent for scavenging free radicals. However, the effect of exogenous melatonin on age-dependent diseases is uncertain. Immune rejection has limited xenotransplantation or allotransplantation of the pineal gland.
L, Hua, X, Dachuan, Y, Lei, X, Shaohu, L, Xiaojing, H, Tao, Z, Shizheng   +6 more
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Localization of N- ethylmaleimide-sensitive fusion protein in pinealocytes

NeuroReport, 1995
N-ethylmaleimide-sensitive fusion protein (NSF), a protein necessary for vesicular docking and/or fusion, was detected immunohistochemically in pinealocytes. NSF was distributed similarly to synaptophysin and vacuolar-type H(+)-ATPase (V-ATPase), marker proteins for synaptic-like microvesicles (MVs) abundantly present in pinealocytes.
Y, Moriyama, A, Yamamoto, M, Tagaya, Y, Tashiro, H, Michibata   +4 more
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Gap junctions between pinealocytes

Cell and Tissue Research, 1981
The intercellular junctions between the pinealocytes of male rats were investigated by freeze-fracture and conventional electron microscopy. Our findings reveal that the intercellular contacts between pineal cells, formerly described as zonulae adhaerentes or zonulae occludentes, are in fact gap junctions which are difficult to characterize in thin ...
R, Taugner, A, Schiller, E, Rix
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Neuropeptide Y increases intracellular calcium in rat pinealocytes

European Journal of Neuroscience, 1999
AbstractThe pineal gland is mainly innervated by sympathetic fibres containing noradrenaline (NA) and neuropeptide Y (NPY). NA released at night stimulates melatonin synthesis via a β1‐adrenergic‐induced increase in cyclic adenosine monophosphate (cAMP) concentration potentiated by an α1‐adrenergic‐induced increase in Ca2+ concentration.
V, Simonneaux, J L, Rodeau, C, Calgari, P, Pévet   +3 more
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