Literature DB >> 1000599

Ultrastructural changes of pituitary gonadotropic cells in estrogen-treated pregnant rats.

M Hassani, J Roos.   

Abstract

An ultrastructural study of gonadotropic pituitary cells was performed in estrogen-treated pregnant rats. Estradiol-treatment on Day 10 of pregnancy led to signs of ovulation or luteinization on Day 12 in 50% of the animals. Degranulation was observed in the FSH and LH cells of estrogen-responsive rats, whereas in the unresponsive group, the same cells were intensely granulated. The FSH cells of the control group showed signs of degranulation which could be correlated with follicular development. LH cells were sometimes degranulated. The role played by FSH and LH cells in the triggering of ovulation and luteinization by estrogen in the pregnant rat is discussed in the light of the ultrastructural observations.

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Year:  1976        PMID： 1000599     DOI： 10.1007/bf00220824

Source DB:  PubMed          Journal:  Cell Tissue Res        ISSN： 0302-766X            Impact factor:   5.249


  10 in total

1.  The site of follicle stimulating and luteinising hormone production in the rat pituitary.

Authors:  H D PURVES; W E GRIESBACH
Journal:  Endocrinology       Date:  1954-12       Impact factor: 4.736

2.  A neural factor in the mechanism by which estrogen induces the release of luteinizing hormone in the rat.

Authors:  C H SAWYER; J W EVERETT; J E MARKEE
Journal:  Endocrinology       Date:  1949-03       Impact factor: 4.736

3.  Hormonal factors responsible for deposition of cholesterol in the corpus luteum of the rat.

Authors:  J W EVERETT
Journal:  Endocrinology       Date:  1947-11       Impact factor: 4.736

4.  OVARIAN CHANGES DURING PREGNANCY IN THE RAT.

Authors:  O Swezy; H M Evans
Journal:  Science       Date:  1930-01-10       Impact factor: 47.728

5.  Functional classification of cell types of the anterior pituitary gland accomplished by electron microscopy.

Authors:  K Kurosumi
Journal:  Arch Histol Jpn       Date:  1968-08

6.  [Prepituitary gonadotropic cells in ovulation induced by estradiol during pregnancy in the rat].

Authors:  M Hassani; J Roos; M Ross
Journal:  C R Seances Soc Biol Fil       Date:  1974

7.  Serum luteinizing hormone, prolactin and progesterone levels during pregnancy in the rat.

Authors:  W K Morishige; G J Pepe; I Rothchild
Journal:  Endocrinology       Date:  1973-05       Impact factor: 4.736

8.  Daily measurement of pituitary LH content during pregnancy in the rat: do cyclic changes persist?

Authors:  N B Schwartz; W L Talley
Journal:  J Reprod Fertil       Date:  1968-02

9.  Luteinizing and ovulatory action of oestradiol in the pregnant rat.

Authors:  J Roos; M Hassani; M Roos
Journal:  Cell Tissue Res       Date:  1975-08-25       Impact factor: 5.249

10.  A simple method for removing the resin from epoxy-embedded tissue.

Authors:  H D MAYOR; J C HAMPTON; B ROSARIO
Journal:  J Biophys Biochem Cytol       Date:  1961-04
  10 in total
  2 in total

1.  Histochemical and ultrastructural modifications of mice endometrium, vagina and pituitary following zeranol treatment.

Authors:  G R Azzali
Journal:  Experientia       Date:  1977-12-15

2.  Structure of the pars distalis in the adult tammar wallaby (Macropus eugenii).

Authors:  J F Leatherland; M B Renfree
Journal:  Cell Tissue Res       Date:  1983       Impact factor: 5.249
  2 in total

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