ISSN:
1432-0878
Keywords:
LHRH, effect of
;
Pineal gland
;
Synaptic ribbons
;
Synaptic spherules
;
Melatonin
;
Rat
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Previous studies have shown that LHRH or LHRH-like substances are present in the pineal gland. In order to investigate whether exogenous LHRH may affect the pineal gland, in the present study the effects of a single dose of LHRH (1 μg, i.p.) on pineal “synaptic” ribbons and spherules as well as serum melatonin levels were examined in diestrous Wistar rats. One hour after the injection both ribbons and spherules exhibited a statistically significant decrease in number. Serum melatonin levels were not affected. It is concluded that humoral feedback mechanisms may exist between the hypothalamus and the pineal gland.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00214988
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