Cited by 176Reproductive Physiology in LivestockOvarian function and disordersEstrogen and related hormone effects

Steroids in the follicular fluid and the corpus luteum of the mare. A “two-cell type” theory of ovarian steroid synthesis

SHORT, R. V.·1962·Journal of Endocrinology

Abstract

SUMMARY A comparison has been made between the steroids present in equine follicular fluid and luteal tissue. Follicular fluid was found to contain progesterone, 17α-hydroxyprogesterone, androstenedione, epitestosterone, 19-norandrostenedione, oestrone, oestradiol-17β and 6α-hydroxyoestradiol-17β, in confirmation of previous studies. On the other hand, luteal tissue contained large amounts of progesterone and 20α-hydroxypregn-4-en-3-one, and a small quantity of 17α-hydroxyprogesterone. No C18 or C19 steroids could be detected. These findings are therefore interpreted as evidence in favour of a 'two-cell type' theory of steroid formation in the ovary. One type, possibly the theca interna cell, has the ability to convert progesterone into oestrogens; the other type, possibly the luteinized granulosa cell, has a diminished 17-hydroxylating ability and is unable to cleave the C21 side chain to make C18 and C19 steroids. However, it does have an active 20-reductase enzyme system present.

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Crossref · 10.1677/joe.0.0240059

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Authors
SHORT, R. V.
Corresponding author
SHORT, R. V.
Venue
Journal of Endocrinology
Published
1962-03-01
Volume
24
Issue
1
Pages
59-63
ISSN
  • 0022-0795 (ISSN-L)
  • 1479-6805
OpenAlex
W2168319499
Cited by
176
References
0
Citations by year
2025: 2 · 2024: 5 · 2023: 1 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 3 · 2015: 3 · 2013: 2 · 2012: 2
FWCI
12.32
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Reproductive Physiology in Livestock
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
ovarian steroids, follicular fluid, corpus luteum, mares, horses, progesterone, 17-hydroxyprogesterone, androstenedione, epitestosterone, estradiol, estrone, 20α-hydroxypregn-4-en-3-one, theca interna cells, luteinized granulosa cells, steroidogenesis
MeSH terms
Animals, Corpus Luteum, Corpus Luteum Hormones, Female, Ovarian Follicle, Horses, Humans, Steroids, Follicular Fluid

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