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[Neuroendocrine modulation of haloperidol-induced catalepsy].

Abstract
Evidence has been accumulated implicating sex hormones as possible modulators of extrapyramidal motor function. In the present study we have investigated the effects of estrogens, progesterone, testosterone, prolactin and calcitonin on behavioral parameters related to nigro-striatal dopaminergic system, such as haloperidol-induced catalepsy in male rats. It was found that 7-days estradiol benzoate treatment (5 micrograms/rat/day) significantly increases haloperidol-induced catalepsy, suggesting a possible antidopaminergic activity of estrogens. On the other hand, prolactin facilitates nigro-striatal dopaminergic transmission. Interestingly, 7 day treatment with medroxy-acetate progesterone (MAP, 5 mg/Kg, i.p.) brings about a trend to a decrease in haloperidol-induced catalepsy, while no significantly effect was observed following acute MAP administration at the same dose. So, it is tempting to speculate that chronic progestinic treatment may result in an increase in dopaminergic tonus. Testosterone, acutely administered (5mg/kg.s.c.) induces changes similar to those observed following progesterone administration. Finally, also calcitonin is able to influence haloperidol-induced catalepsy by markedly increasing it.
AuthorsC Speciale, N Ferrara, M A Sortino, G Giammona, R Bernardini, D De Simone, P Marano
JournalBollettino della Società italiana di biologia sperimentale (Boll Soc Ital Biol Sper) Vol. 59 Issue 1 Pg. 51-7 (Jan 31 1983) ISSN: 0037-8771 [Print] ITALY
Vernacular TitleModulazione neuroendocrina della catalessi indotta da aloperidolo.
PMID6303368 (Publication Type: English Abstract, Journal Article)
Chemical References
  • Androgens
  • Estrogens
  • Hormones
  • Haloperidol
  • Dopamine
Topics
  • Androgens (pharmacology)
  • Animals
  • Catalepsy (chemically induced, physiopathology)
  • Dopamine (physiology)
  • Endocrine Glands (physiology)
  • Estrogens (pharmacology)
  • Extrapyramidal Tracts (physiology)
  • Haloperidol (pharmacology)
  • Hormones (pharmacology)
  • Humans
  • Rats
  • Synaptic Transmission (drug effects)

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