ISSN:
1435-1463
Keywords:
Intrapineal neuron
;
light condition
;
morphometry
;
tyrosine hydroxylase
;
golden hamster
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Tyrosine hydroxylase (TH)-positive neurons (TH neurons) were found in the pineal gland of golden hamsters. To examine possible relations between TH neurons and environmental light, we kept male animals under constant light (LL) and darkness (DD) for a week, and morphometrically compared the number, size, and immunoreactivity of TH neurons with those of control animals kept under 12L/12D (LD), using an image processor, Nexus 6400. In LL animals, the number of TH neurons/mm2 of pineal tissue and each cell area were decreased, and immunoreactivity to TH was less than in LD animals. In DD animals, the number of TH neurons and each cell area were increased, and immunoreactivity decreased slightly. These data suggested that environmental light affected the TH neurons, and the amount of TH in the neurons would be decreased by LL, but increased by DD.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01272766
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