The effect of intracerebroventricular administration of neuropeptide Y on reproductive axis function in the male Wistar rats: Involvement of hypothalamic KiSS۱/GPR۵۴ system

Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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JR_VRFAN-11-3_008

تاریخ نمایه سازی: 25 آبان 1402

Abstract:

Several studies have shown that neuropeptide Y (NPY) is considered to be one of the key regulators of the hypothalamic-pituitary-gonadal axis in the mammals. Also, kisspeptin is a powerful upstream regulator of gonadotropin-releasing hormone neurons in the hypothalamus. The present study aims to investigate the effects of the intracerebroventricular (ICV) injection of NPY and BIBP۳۲۲۶ (NPY receptor antagonist) on the reproductive axis (either hormonal or behavioral) of the male rats. Furthermore, to see whether NPY signals can be relayed through the pathway of KiSS۱/GPR۵۴, the gene expression of these peptides in the arcuate nucleus was measured. The ICV injection of NPY decreased the latencies and increased the frequencies of sexual parameters of the male rats in a significant way. Results obtained from LH and testosterone measurement showed that NPY had a significant increase in comparison with the control group. In this line, BIBP۳۲۲۶ antagonized the stimulative effects of NPY. Furthermore, data from real-time quantitative PCR showed that injection of NPY significantly increased the gene expression of KiSS۱ and GPR۵۴, while treatment with BIBP۳۲۲۶ controlled the stimulative effects of NPY on gene expression of KiSS۱ and GPR۵۴. Summing up, NPY can exert its impacts on the reproductive axis, this occurs at least partly through affecting KiSS۱/GPR۵۴ system.

Authors

Vahid Azizi

Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran

Shahrbanoo Oryan

Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.

Homayoun Khazali

Department of Animal Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran

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