1 Ocak 2019 Dergi makalesi Açık Erişim

Tekin, Suat; Beytur, Ali; Erden, Yavuz; Beytur, Asiye; Cigremis, Yilmaz; Vardi, Nigar; Turkoz, Yusuf; Tekedereli, Ibrahim; Sandal, Suleyman

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    <subfield code="a">Effects of intracerebroventricular administration of irisin on the hypothalamus-pituitary-gonadal axis in male rats</subfield>
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    <subfield code="a">Irisin is a product of fibronectin type III domain-containing protein 5 (FNDC5) and plays an important role in energy homeostasis. In this study, we aimed to determine effects of intracerebroventricular administration of irisin on the hypothalamus-pituitary-gonadal axis by molecular, biochemical, and morphological findings. Fourty male Wistar-Albino rats were used and divided into four groups including control, sham (vehicle), 10, and 100 nM irisin infused groups (n = 10). Hypothalamic gonadotropin releasing hormone (GnRH) level and serum luteinizing hormone (LH), follicle-stimulating hormone (FSH), and testosterone levels were determined. Testicular tissue histology and spermiogram analysis were also performed. Both irisin concentrations significantly reduced hypothalamic GnRH messenger RNA (mRNA) and protein levels (p &amp;lt; 0.05). It was found that serum LH, FSH, and testosterone levels and Sertoli and Leydig cell numbers were decreased by irisin administration (p &amp;lt; 0.05). In addition, irisin administration reduced sperm density and mobility (p &amp;lt; 0.05). However, it did not cause any change in testicular and epididymis weights and tubular diameter. Our results reveal that irisin can play a role in the central regulation of reproductive behavior and also reduces testosterone levels by suppressing LH and FSH secretion. These results suggest that the discovery of irisin receptor antagonists may be beneficial in the treatment of infertility.</subfield>
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    <subfield code="u">Inonu Univ, Dept Urol, Fac Med, Malatya, Turkey</subfield>
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    <subfield code="u">Inonu Univ, Dept Physiol, Fac Med, TR-44280 Malatya, Turkey</subfield>
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