Dehidroepiandrosteron ile indüklenen sıçan polikistik over sendromu modelinde Phoenixin-14 peptidinin ovaryum morfolojisi üzerine etkileri
Date
2024-07-12
Authors
Berber, Miray
Journal Title
Journal ISSN
Volume Title
Publisher
Bursa Uludağ Üniversitesi
Abstract
Polikistik Over Sendromu (PKOS), üreme çağındaki kadınların üreme ve endokrinsistemlerini etkileyen heterojen metabolik bozukluklardan biridir. Phoenixin (PNX),hipotalamusta üretilen ve hipofiz gonadotropları üzerinde doğrudan etki göstererek üremenin regülasyonunda görev alan bir nöropeptiddir. Çalışmamızda dehidroepiandrosteron (DHEA) ile indüklenen polikistik over sendromu (PKOS) sıçanmodelinde, Phoenixin-14 peptidinin PKOS kaynaklı olası fertilite değişikliklerine karşı ovaryum dokusu üzerindeki iyileştirici etkinliğinin gösterilmesi amaçlandı.30 adet yetişkin dişi sıçan; kontrol, sham, PKOS, PNX-14 (2,5 nmol), PNX-14 (5nmol) ve PNX-14 (30 nmol) şeklinde 6 gruba ayrıldı. Kontrol grubuna herhangi birişlem uygulanmadı. Sham grubuna 0,01 ml %95 etanol ve 0,09 ml susam yağı karışımı subkutan olarak verildi. PKOS modeli, 6 mg/100 g vücut ağırlığı dozunda 21 gün boyunca subkutan DHEA uygulamasıyla oluşturuldu. PNX-14 dozları iseintraperitoneal olarak uygulandı. Deneklere ait doku ve kan örnekleri biyokimyasal, moleküler, histolojik ve immünohistokimyasal açıdan incelendi. PKOS grubu deneklerin östrus siklusu döngülerinin bozulduğu ve vücut ağırlıklarının istatistiksel olarak arttığı belirlendi. Biyokimyasal parametrelerden serum folikül stimülan hormon (FSH), estradiol (E2) ve progesteron (PRG)düzeylerinin azaldığı, luteinizan hormon (LH) : FSH oranları ile testosteron (T)seviyelerinin arttığı tespit edildi. Tedavi gruplarının, deneklerin östrus sikluslarınıdüzelterek, serum seviyelerini kontrole yaklaştırdığı gözlendi. PCNA proteinekspresyonları bakımından tüm gruplar değerlendirildiğinde, PKOS grubundaki ekspresyon seviyelerinin kontrol ve sham gruplarına göre azaldığı, sadece 5 nmol’lükPNX-14 doz grubundaki etkinin anlamlı olduğu bulundu. İmmünohistokimyasal veriler de bu bulguyu destekledi. Histomorfolojik analizler sonucunda, DHEA etkisiyle bozulan folikülogenezin PNX-14 peptidinin farklı dozları ile düzelebileceği saptandı. Sonuç olarak, DHEA kaynaklı PKOS sıçan modelinde ovaryum dokusunda meydana gelen histopatolojik değişikliklerin, PNX-14 peptidinin teröpatik etkisi ileiyileştirilebileceği bulundu. PKOS kaynaklı anormal folikülogenez ve anovulasyonda, PNX-14 peptidinin gelecekte PKOS tedavisi için kullanılabilecek potansiyel bir hedef olabileceğini düşünmekteyiz.
Polycystic Ovary Syndrome (PCOS) is one of the heterogeneous metabolic disorders that affects the reproductive and endocrine systems of women of reproductive age. Phoenixin (PNX) is a neuropeptide produced in the hypothalamusand involved in regulating reproduction by acting directly on the pituitarygonadotropes. In our study, we aimed to demonstrate the healing effect of Phoenixin-14 peptide on ovarian tissue against possible PCOS-induced fertility changes in thedehydroepiandrosterone (DHEA)-induced polycystic ovary syndrome (PCOS) ratmodel. 30 adult female rats; were divided into 6 groups: control, sham, PCOS, PNX-14 (2.5 nmol), PNX-14 (5 nmol), and PNX-14 (30 nmol). No procedure was applied tothe control group. A mixture of 0.01 ml 95% ethanol and 0.09 ml sesame oil was given subcutaneously to the sham group. The PCOS model was established by subcutaneousadministration of DHEA at a dose of 6 mg/100 g body weight for 21 days. PNX-14doses were administered intraperitoneally. The tissue and blood samples of thesubjects were examined biochemically, molecular, histologically, andimmunohistochemically.It was determined that the estrous cycles of the PCOS group subjects weredisrupted and their body weights increased statistically. Among the biochemicalparameters, serum follicle stimulating hormone (FSH), estradiol (E2), andprogesterone (PRG) levels decreased, while luteinizing hormone (LH) : FSH ratiosand testosterone (T) levels increased. It was observed that the treatment groupsimproved the subjects' estrous cycles and brought their serum levels closer to control.When all groups were evaluated in terms of PCNA protein expressions, it was foundthat the expression levels in the PCOS group decreased compared to the control andsham groups, and only the effect in the 5 nmol PNX-14 dose group was significant. Immunohistochemical data also supported this finding. As a result ofhistomorphological analysis, it was determined that folliculogenesis, which wasdisrupted by the effect of DHEA, could be improved with different doses of PNX-14peptide.As a result, the histopathological changes occurring in the ovarian tissue in theDHEA-induced PCOS rat model could be improved by the therapeutic effect of the PNX-14 peptide. We think that in PCOS-induced abnormal folliculogenesis andanovulation, PNX-14 peptide may be a potential target that can be used for PCOS treatment in the future.
Polycystic Ovary Syndrome (PCOS) is one of the heterogeneous metabolic disorders that affects the reproductive and endocrine systems of women of reproductive age. Phoenixin (PNX) is a neuropeptide produced in the hypothalamusand involved in regulating reproduction by acting directly on the pituitarygonadotropes. In our study, we aimed to demonstrate the healing effect of Phoenixin-14 peptide on ovarian tissue against possible PCOS-induced fertility changes in thedehydroepiandrosterone (DHEA)-induced polycystic ovary syndrome (PCOS) ratmodel. 30 adult female rats; were divided into 6 groups: control, sham, PCOS, PNX-14 (2.5 nmol), PNX-14 (5 nmol), and PNX-14 (30 nmol). No procedure was applied tothe control group. A mixture of 0.01 ml 95% ethanol and 0.09 ml sesame oil was given subcutaneously to the sham group. The PCOS model was established by subcutaneousadministration of DHEA at a dose of 6 mg/100 g body weight for 21 days. PNX-14doses were administered intraperitoneally. The tissue and blood samples of thesubjects were examined biochemically, molecular, histologically, andimmunohistochemically.It was determined that the estrous cycles of the PCOS group subjects weredisrupted and their body weights increased statistically. Among the biochemicalparameters, serum follicle stimulating hormone (FSH), estradiol (E2), andprogesterone (PRG) levels decreased, while luteinizing hormone (LH) : FSH ratiosand testosterone (T) levels increased. It was observed that the treatment groupsimproved the subjects' estrous cycles and brought their serum levels closer to control.When all groups were evaluated in terms of PCNA protein expressions, it was foundthat the expression levels in the PCOS group decreased compared to the control andsham groups, and only the effect in the 5 nmol PNX-14 dose group was significant. Immunohistochemical data also supported this finding. As a result ofhistomorphological analysis, it was determined that folliculogenesis, which wasdisrupted by the effect of DHEA, could be improved with different doses of PNX-14peptide.As a result, the histopathological changes occurring in the ovarian tissue in theDHEA-induced PCOS rat model could be improved by the therapeutic effect of the PNX-14 peptide. We think that in PCOS-induced abnormal folliculogenesis andanovulation, PNX-14 peptide may be a potential target that can be used for PCOS treatment in the future.
Description
Keywords
PKOS, Phoenixin-14, ELISA, İmmünohistokimya, Sıçan, PCOS, Immunohistochemistry, Rat