Khadijeh Haghighat Gollo, Fariba Mahmoudi, Abolfazl Bayrami, Saber Zahri,
Volume 23, Issue 2 (5-2020)
Abstract
Background and Aim: In patients suffer from Polycystic Ovary Syndrome (PCOS), the secretion of the Luteinizing Hormone (LH) increases while adiponectin secretion and dopamine release decreases. Dopamine and adiponectin exert inhibitory effecs on LH secretion. In the present study the effects of L-dopa and dopamine receptor antagonists were investigated on LH secretion and adiponectin gene expression of in PCOS model rats to determine whether dopaminergic pathway might be involved in the decreasing LH via affecting adiponectin.
Methods & Materials: Following estradiol valerate- induced PCOS, fifteen PCOS rats were divided into 3 groups including saline receiving group, L-dopa(100 mg/kg) or simultaneous injections of sulpride(10 mg/kg), SCH23390 hydrochloride (1 mg/kg) and L-dopa(100 mg/kg), Five intact rats received saline as negative control group. Blood samples were collected via tail vein. Ovary and hypothalamus were dissected and frozen. Serum concentration of LH and relative gene expression of adiponectin in ovary and hypothalamus were determined by radioimmunoassay and real time-PCR method.
Ethical Considerations: This study was approved by the Research Committee of University of Mohaghegh Ardabili (Code: 95.125.1).
Results: Induction of PCOS caused a significant increase in mean serum concentration of LH and a significant decrease in mean relative gene expression of ovarian and hypothalamic adiponectin compared to control group. L-dopa caused a significant decrease in serum concentration of LH, a significant decrease in hypothalamic gene expression of adiponectin compared to PCOS rats. But it did not significantly increase ovarian adiponectin gene expression in comparison to PCOS rats. Dopamine receptor antagonists inhibit the effects of L-dopa on LH and hypothalamic gene expression of adiponectin.
Conclusion: Dopaminergic signaling pathway may be involved in decreasing LH secretion via increasing hypothalamic adiponectin gene expression level in PCOS rats.
Faranak Moradi, Ali Akbarnejad,
Volume 24, Issue 3 (8-2021)
Abstract
Background and Aim: Polycystic Ovary Syndrome (PCOS) is an endocrine disorder in women of reproductive age. In cross-sectional and longitudinal studies, exercise training is an effective solution for treating and declining the symptoms. This study aims to compare the effects of the voluntary and the endurance exercise on some of the inflammatory and hormonal markers in rats with PCOS.
Methods & Materials: In this study, Which was experimental and applied in terms of purpose, 40 female Wistar rats with Mean±SD weight of 220±20 g were divided randomly into four groups of ten: 1) control, 2) PCOS, 3) PCOS + Running wheel and 4) PCOS + endurance training. The rats in the voluntary group experienced voluntary activity of wheel running for 8 weeks (5 times a week). Alternatively, the endurance training group underwent aerobic exercises for 8 weeks (5 sessions in a week) on a treadmill. The blood samples were taken from the heart to measure the concentration of interleukin-6 and testosterone level and were analyzed by one-way analysis of variance and LSD post hoc test.
Ethical Considerations: This study was approved by the Tehran University, Iran (Code: IR.UT.REC.1395016).
Results: The results showed no significant difference in IL-6 and testosterone indices between endurance and voluntary training groups (P=0.565), (P=0.496). Both training groups (endurance and voluntary) separately resulted in a significant reduction in il6 and testosterone compared to rats with PCOS (P=0.002), (P=0.000), (P=0.038), (P=0.007).
Conclusion: Altogether, the present study’s findings suggest that voluntary and endurance training in rats have similar effects on IL-6, Testosterone, and weight.
