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- Title
Relation of the Pineal Gland and Environmental Lighting to Thyroid Function in the Rat.
- Authors
Rowe, John W.; Richert, John R.; Klein, David C.; Reichlin, Seymour
- Abstract
The relationship of the pineal gland and of environmental lighting to the pituitary-thyroid axis and accessory reproductive organs was studied in young male rats. Following either pinealectomy or sham operation, the animals were placed for 28 days in one of the following lighting environments: constant light, diurnal lighting, or constant darkness. The results demonstrate that the pineal gland does not influence the pituitary-thyroid axis, and that constant dark induces seminal vesicle involution, a response shown to depend on the presence of the pineal gland, but one that does not correlate with pineal hydroxyindole-O-methyl transferase (HIOMT) activity. Light deprivation resulted in increased thyroid weight, and constant light decreased thyroid weight, effects that were not related to the presence or absence of the pineal gland. Copyright © 1970 S. Karger AG, Basel
- Publication
Neuroendocrinology, 1970, Vol 6, Issue 4, p247
- ISSN
0028-3835
- Publication type
Article
- DOI
10.1159/000121928