The Impact of Morphine on Reproductive Activity in Male Rats Is Regulated by Rf-Amid-Related Peptide-3 and Substance P Adjusting Hypothalamic Kisspeptin Expression.
J Mol Neurosci
; 69(3): 456-469, 2019 Nov.
Article
in En
| MEDLINE
| ID: mdl-31290091
ABSTRACT
Obviously, opiates (e.g., morphine) are associated with the suppression and dysfunction of reproductive axis. It has been reported that substance P (SP) and RF-amid-related peptide-3 (RFRP-3) can exhibit anti-opioid effects in some regions of the nervous system. Moreover, SP and RFRP-3 are deemed as neuropeptides which exert modulatory and regulatory impacts on the function of the reproductive axis. The precise interactions of morphine with SP or RFRP-3 on the parameters of the reproductive activity, however, are not fully known. The present study was aimed to determine the impacts of the interaction of morphine either with SP or RFRP-3 on the hormonal and behavioral parameters of reproductive activity in male rats. In addition, it was aimed at determining whether the effects of these interactions rely on kisspeptin/G protein coupled receptor 54 (GPR54) pathway as the main upstream pulse generator and the mediator of the function of many inputs of gonadotropin-releasing hormone (GnRH)/luteinizing hormone (LH) system or not. Altogether, the resulted data from the sexual behavior tests, radioimmunoassay of LH/testosterone, and real-time quantitative PCR for the assessment of the expression of hypothalamic Kiss1, Gpr54, and Gnrh1 genes following concomitant administration of morphine with SP or RFRP-3 revealed that the suppressing effects of morphine on the parameters of reproductive axis activity can be affected by the administration of either RFRP-3 or SP. It is advocated that SP and RFRP-3, by the modulation of the expression of hypothalamic Kiss1, can possibly antagonize the effects of morphine on GnRH/LH system and sexual behavior.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sexual Behavior, Animal
/
Neuropeptides
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Substance P
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Kisspeptins
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Receptors, Kisspeptin-1
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Hypothalamus
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Morphine
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Nerve Tissue Proteins
Limits:
Animals
Language:
En
Journal:
J Mol Neurosci
Journal subject:
BIOLOGIA MOLECULAR
/
NEUROLOGIA
Year:
2019
Document type:
Article
Affiliation country: