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Immunoreactive LHRH in chronic starved rats.
Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
|July 1, 1986
Summary
Chronic starvation significantly reduces body weight, pituitary, ovarian, and uterine weights in female rats. It also decreases serum and pituitary luteinizing hormone (LH) while increasing hypothalamic gonadotropin-releasing hormone (GnRH).
Area of Science:
- Reproductive Endocrinology
- Neuroendocrinology
- Nutritional Physiology
Background:
- Chronic starvation impacts reproductive functions.
- Hormonal regulation of reproduction is sensitive to nutritional status.
Purpose of the Study:
- To investigate the effects of chronic starvation on the hypothalamic-pituitary-gonadal axis in female rats.
- To assess changes in LHRH, LH, and reproductive organ weights under caloric restriction.
Main Methods:
- Adult female Wistar rats were subjected to chronic starvation (1/4 ad libitum intake) for 21 or 30 days.
- Control rats were fed ad libitum.
- Measurements included hypothalamic and serum LHRH, pituitary and serum LH, and organ weights (pituitary, ovary, uterus).
Main Results:
- Chronic starved rats showed a 44% reduction in body weight and significant decreases in anterior pituitary (44%), ovarian (61%), and uterine weights (69%).
- Serum LH (5.67 ng/ml vs 33.30 ng/ml) and pituitary LH content (286.7 µg vs 451.0 µg) were significantly lower in starved rats.
- Hypothalamic immunoreactive LHRH (IR-LHRH) content was significantly increased in starved rats (5.77 ng/extract vs 4.41 ng/extract).
Conclusions:
- Chronic starvation severely impairs reproductive organ development and function in female rats.
- Nutritional deficits lead to suppressed LH secretion and elevated hypothalamic LHRH, suggesting altered feedback mechanisms.