Opiate receptor ontogeny in the rat medial preoptic area is androgen-dependent

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The relationship of opiate receptors in the medial preoptic area of the hypothalamus (MPOA) to the gonadal steroid hormone environment during development was assessed using regional densitometric analyses of [3H]naloxone binding in autoradiographs prepared using brain sections from 5-day-old male and female rats treated postnatally either with tamoxifen (0.5 mg/kg), flutamide (20 mg/kg), dihydrotestosterone (DHT; 12.5 mg/kg), or sesame oil vehicle. Tamoxifen, a specific estrogen receptor antagonist, did not alter MPOA binding density in either males of females. Flutamide, a specific androgen receptor antagonist, and DHT, a nonaromatizable androgenic compound, altered the MPOA binding density in males and females, respectively. No treatment altered the binding density in several other brain regions. The results suggest that androgen, not estrogen, regulates the differentiation of MPOA opiate receptors. Since the neuronal development in the region is thought to be mediated by estrogen, both hormones probably act concurrently to affect the ontogeny of different parameters in the same brain region.

Original languageEnglish (US)
Pages (from-to)336-341
Number of pages6
JournalNeuroendocrinology
Volume48
Issue number4
StatePublished - 1988
Externally publishedYes

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Preoptic Area
Opioid Receptors
Androgens
Hypothalamus
Flutamide
Tamoxifen
Brain
Estrogens
Androgen Receptor Antagonists
Sesame Oil
Dihydrotestosterone
Gonadal Steroid Hormones
Naloxone
Hormones

ASJC Scopus subject areas

  • Endocrinology
  • Neuroscience(all)

Cite this

Opiate receptor ontogeny in the rat medial preoptic area is androgen-dependent. / Hammer, Ronald P.

In: Neuroendocrinology, Vol. 48, No. 4, 1988, p. 336-341.

Research output: Contribution to journalArticle

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