Cited by 92Estrogen and related hormone effectsHypothalamic control of reproductive hormonesNeuroendocrine regulation and behavior

Regional Sex Differences in Cell Nuclear Estrogen-Binding Capacity in the Rat Hypothalamus and Preoptic Area*

BROWN, THEODORE J., HOCHBERG, RICHARD B., ZIELINSKI, JAN E., MACLUSKY, NEIL J.·1988·Endocrinology

Abstract

Estrogen binding was compared in cell nuclear KCl extracts from microdissected brain regions of gonadectomized-adrenalectomized male and female rats treated with a near-saturating dose of 17 beta-estradiol. Injection of 3.6 or 36.0 micrograms 17 beta-estradiol/kg BW, iv, 1 h before death resulted in a higher level of estrogen binding in the periventricular preoptic area (PVPOA), medial preoptic area, and ventromedial nucleus of the hypothalamus (VMN) of the female than in comparable tissue samples from the male. No significant sex differences in nuclear estrogen binding were observed in the arcuate-median eminence region, bed nucleus of the stria terminalis, or corticomedial amygdala. Scatchard analysis of saturation binding data revealed that the sex differences in cell nuclear estrogen binding in the PVPOA, medial preoptic area, and VMN reflect a difference in binding capacity rather than binding affinity. These in vitro biochemical findings were confirmed by autoradiographic studies. Gonadectomized-adrenalectomized animals were injected with 125I-labeled 11 beta-methoxy-16 alpha-iodoestradiol (2.0 micrograms/kg BW). Thin frozen sections (10 microns) through the preoptic area and hypothalamus were thaw-mounted onto microscope slides, then exposed against LKB Ultrofilm for 21 days. The autoradiographic images exhibited similar silver distributions and densities in males and females in the arcuate-median eminence region bed nucleus of the stria terminalis, and amygdala. Howev…

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Crossref · 10.1210/endo-123-4-1761

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Authors
BROWN, T. J., HOCHBERG, R. B., ZIELINSKI, J. E., & MACLUSKY, N. J.
Affiliations
Yale University (US)
Venue
Endocrinology
Published
1988-10
Volume
123
Issue
4
Pages
1761-1770
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2003345618
Cited by
92
References
47
Citations by year
2021: 1 · 2019: 1 · 2017: 1 · 2016: 1 · 2015: 3 · 2014: 2 · 2013: 2
FWCI
3.77
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Cancer Institute (CA-37799)
  • National Institute of Neurological Disorders and Stroke (NS-07807)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD 13587)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
sex differences, estrogen binding, nuclear estrogen receptor, hypothalamus, preoptic area, ventromedial hypothalamus, medial preoptic area, estradiol, gonadectomy, adrenalectomy, binding capacity, binding affinity, pituitary function, reproductive behavior
MeSH terms
Adrenalectomy, Animals, Cell Nucleus, Estradiol, Female, Hypothalamus, Male, Orchiectomy, Organ Specificity, Ovariectomy, Preoptic Area, Rats, Inbred Strains, Receptors, Estrogen, Reference Values, Sex Factors, Rats

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