Literature DB >> 3350117

Effect of continuous illumination on secretion of pregnane compounds by the rat ovary.

T Kosaka1, T Sawada, S Ichikawa.   

Abstract

Differences in the secretion of pregnane compounds from rats with follicular polycystic ovaries under constant light and with normal preovulatory ovaries under light-dark conditions were compared. The injection of LH greatly increased the secretion of progesterone. 5 alpha-pregnane-3,20-dione and 3 alpha-hydroxy-5 alpha-pregnan-20-one, in both types of ovaries, but the response of the two progesterone metabolites in the polycystic ovaries was low, suggesting low 5 alpha-reductase activity.

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Year:  1988        PMID： 3350117     DOI： 10.1007/bf01960239

Source DB:  PubMed          Journal:  Experientia        ISSN： 0014-4754


  10 in total

1.  A HISTOCHEMICAL METHOD FOR THE DEMONSTRATION OF 20-ALPHA-HYDROXYSTEROID DEHYDROGENASE ACTIVITY IN RAT OVARIES.

Authors:  K BALOGH
Journal:  J Histochem Cytochem       Date:  1964-09       Impact factor: 2.479

2.  Acute effect of gonadotrophins on the secretion of progestins by the rat ovary.

Authors:  S Ichikawa; H Morioka; T Sawada
Journal:  Endocrinology       Date:  1972-05       Impact factor: 4.736

3.  Ovarian secretion of pregnane compounds during the estrous cycle and pregnancy in rats.

Authors:  S Ichikawa; T Sawada; Y Nakamura; H Morioka
Journal:  Endocrinology       Date:  1974-06       Impact factor: 4.736

4.  5 -dihydroprogesterone influence on ovulation of prepuberal rats.

Authors:  M K Sanyal; R B Todd
Journal:  Proc Soc Exp Biol Med       Date:  1972-11

5.  Dehydrogenases in the rat ovary. II. A histochemical study of steroid and carbohydrate metabolizing enzymes in micropolycystic ovaries induced by continuous illumination.

Authors:  H Bratt; M Pupkin; C W Lloyd; J Weisz; K Balogh
Journal:  Endocrinology       Date:  1968-08       Impact factor: 4.736

Review 6.  Modifications in the CNS regulation of reproduction after exposure of prepubertal rats to steroid hormones.

Authors:  C A Barraclough
Journal:  Recent Prog Horm Res       Date:  1966

7.  Identification of the neutral steroids in the ovarian venous plasma of LH-stimulated rats.

Authors:  S Ichikawa; H Morioka; T Sawada
Journal:  Endocrinology       Date:  1971-02       Impact factor: 4.736

8.  Estrogen and androgen production in vitro from 7-3-H-progesterone by normal and polycystic rat ovaries.

Authors:  J Weisz; C W Lloyd
Journal:  Endocrinology       Date:  1965-10       Impact factor: 4.736

9.  [Morphological recovery in the polycystic ovaries of persistent-estrus rats induced by continuous illumination (author's transl)].

Authors:  T Sawada; T Kosaka
Journal:  Jikken Dobutsu       Date:  1981-10

10.  Selective release of follicle-stimulating hormone and luteinizing hormone by 5 alpha-dihydroprogesterone and 3 alpha, 5 alpha-tetrahydroprogesterone in pregnant mare's serum gonadotropin-primed immature rats exposed to constant light.

Authors:  L L Murphy; V B Mahesh
Journal:  Biol Reprod       Date:  1985-05       Impact factor: 4.285
  10 in total

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