Alterations in plasma and ovarian immunoreactive inhibin during reproductive aging in the female rat

Endocrine ◽  
1995 ◽  
Vol 3 (5) ◽  
pp. 327-333 ◽  
Author(s):  
Ming H. Jih ◽  
Tsung-Chieh J. Wu
Keyword(s):  
Reproductive Aging ◽  
Female Rat

Perinatal exposure to mixtures of endocrine disrupting chemicals reduces female rat follicle reserves and accelerates reproductive aging

2016 ◽  
Vol 61 ◽  
pp. 186-194 ◽  
Author(s):  
Hanna Katarina Lilith Johansson ◽  
Pernille Rosenskjold Jacobsen ◽  
Ulla Hass ◽  
Terje Svingen ◽  
Anne Marie Vinggaard ◽  
...  
Keyword(s):  
Endocrine Disrupting Chemicals ◽  
Perinatal Exposure ◽  
Reproductive Aging ◽  
Female Rat ◽  
Endocrine Disrupting

scholarly journals Somatostatin in the Periventricular Nucleus of the Female Rat: Age Specific Effects of Estrogen and Onset of Reproductive Aging

Sex Steroids ◽  
10.5772/27872 ◽  
2012 ◽  
Author(s):  
Eline M. Van der Beek ◽  
Harmke H. Van Vugt ◽  
Annelieke N. ◽  
Bert J.M. Van de Heijning
Keyword(s):  
Reproductive Aging ◽  
Female Rat ◽  
Specific Effects ◽  
Periventricular Nucleus

Melatonin Treatment Delays Reproductive Aging of Female Rat via the Opiatergic System

1992 ◽  
Vol 56 (3) ◽  
pp. 364-370 ◽  
Author(s):  
Gian Paolo Trentini ◽  
Andrea R. Genazzani ◽  
Mario Criscuolo ◽  
Felice Petraglia ◽  
Carmela de Gaetani ◽  
...  
Keyword(s):  
Reproductive Aging ◽  
Female Rat ◽  
Melatonin Treatment ◽  
Treatment Delays

Menstrual Changes Mark Reproductive Aging

2012 ◽  
Vol 42 (4) ◽  
pp. 4
Author(s):  
JENNIE SMITH
Keyword(s):  
Reproductive Aging

OXYDATION DES ANABOLIKUMS 1-METHYL-ANDROST-1-EN-17β-OL-3-ON MIT WASSERSTOFFTRANSFER AUF ÖSTRON

1971 ◽  
Vol 67 (3) ◽  
pp. 517-530 ◽  
Author(s):  
Martin Wenzel
Keyword(s):  
Rat Liver ◽  
Anabolic Steroid ◽  
Female Rats ◽  
Male Rats ◽  
Female Rat ◽  
Liver Slices ◽  
Androgen Effects ◽  
Biochemical Difference

ABSTRACT With the aid of metenolon-17α-T a tritium-transfer to oestrone in rat liver slices was demonstrated. This tritium-transfer from metenolon17α-T to oestrone yielding tritium-labelled oestradiol had a higher efficiency in male than in female rat liver. Correspondingly in the presence of metenolon the relation of oestrone to oestradiol is changed more in male than in female rat liver. Looking for biochemical differences between the anabolic steroid metenolon and testosterone the oxydation at C17 was measured in different organs of the rat using 17α-T-labelled steroids. The highest oxydation rate was found for both steroids in the liver. In the sexual organs of male rats the oxydation rate of testosterone was 50–10 times higher than that of the anabolic steroid. This difference was less in sexual organs of female rats. This result of a greater biochemical difference between both steroids in males than in females leads to the question, whether the dissociation between the anabolic and the androgen effects is higher in males than in females.

GONADOTROPHIN PATTERNS IN MALE AND FEMALE RATS:

1968 ◽  
Vol 58 (4) ◽  
pp. 600-612 ◽  
Author(s):  
Robert Boyd ◽  
Donald C. Johnson
Keyword(s):  
Ascorbic Acid ◽  
Testosterone Propionate ◽  
Female Rats ◽  
Female Rat ◽  
Feedback Effects ◽  
Male And Female ◽  
Prostate Weight ◽  
Male And Female Rats ◽  
Males And Females ◽  
Normal Males

ABSTRACT The effects of various doses of testosterone propionate (TP) upon the release of luteinizing hormone (LH or ICSH) from the hypophysis of a gonadectomized male or female rat were compared. Prostate weight in hypophysectomized male parabiotic partners was used to evaluate the quantity of circulating LH. Hypophyseal LH was measured by the ovarian ascorbic acid depletion method. Males castrated when 45 days old secreted significantly more LH and had three times the amount of pituitary LH as ovariectomized females. Administration of 25 μg TP daily reduced the amount of LH in the plasma, and increased the amount in the pituitary gland, in both sexes. Treatment with 50 μg caused a further reduction in plasma LH in males, but not in females, while pituitary levels in both were equal to that of their respective controls. LH fell to the same low level in partners of males or females receiving 100 μg TP. When gonadectomized at 39 days, males and females had the same amount of plasma LH, but males had more stored hormone. Pituitary levels were unchanged from controls following treatment with 12.5, 25 or 50 μg TP daily, but plasma values dropped an equal amount in both sexes with the latter two doses. Androgenized males or females, gonadectomized when 39 days old, were very sensitive to the effects of TP and plasma LH was significantly reduced with 12.5 μg daily. Pituitary LH in androgenized males was higher than that of normal males but was reduced to normal by small amounts of TP. The amount of stored LH in androgenized females was not different from that of normal females and it was unchanged by any dose of TP tested. Results are consistent with the conclusion that the male hypothalamic-hypophyseal axis is at least as sensitive as the female axis to the negative feedback effects of TP. Androgenization increases the sensitivity to TP in both males and females.

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