scholarly journals Analysis of the vascular responses in a murine model of polycystic ovary syndrome

2013 ◽  
Vol 218 (2) ◽  
pp. 205-213 ◽  
Author(s):  
Sieneke Labruijere ◽  
E Leonie A F van Houten ◽  
René de Vries ◽  
Usha M Musterd-Bagghoe ◽  
Ingrid M Garrelds ◽  
...  

Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women of the reproductive age, but the exact pathophysiological mechanisms involved remain unclear. Cardiovascular disease risk is increased in PCOS patients and endothelial damage has been observed. We recently developed a mouse model of PCOS with reproductive and metabolic characteristics resembling those observed in women with PCOS. In this model we studied vascular function with particular emphasis on markers of vascular endothelial function. Animals were treated for 90 days with dihydrotestosterone (DHT; 27.5 μg/day) or placebo using subcutaneous continuous-release pellets. Aortas were isolated for isometric force recordings in organ baths to investigate endothelial and vascular smooth muscle characteristics. Lungs were used to analyze endothelial nitric oxide synthase (eNOS) expression and phosphorylation. Asymmetric dimethylarginine (ADMA) levels were investigated in serum to assess endothelial damage. Expression of androgen receptor (Ar) mRNA was studied in aortas. DHT treatment (compared with placebo) induced i) a significant decrease in acetylcholine-induced aortic relaxations, with no change in calcitonin gene-related peptide- or sodium nitroprusside-induced relaxations, as well as 5-hydroxytryptamine-induced contractions; ii) no change in eNOS expression/phosphorylation in lungs or in plasma ADMA levels; and iii) a twofold increase in aortic AR expression. Our results suggest that, in DHT-exposed mice, hyperandrogenemia specifically decreases endothelium-dependent vasorelaxation without deterioration of smooth muscle function. This study may initiate further investigations to elucidate underlying mechanism for the phenotype that is present in these animals, as well as in PCOS patients.

2011 ◽  
Vol 17 (6) ◽  
pp. 741-760 ◽  
Author(s):  
Konstantinos A. Toulis ◽  
Dimitrios G. Goulis ◽  
Gesthimani Mintziori ◽  
Evangelia Kintiraki ◽  
Evangelos Eukarpidis ◽  
...  

2016 ◽  
Vol 105 (5) ◽  
pp. 1338-1344.e3 ◽  
Author(s):  
Valam Putthussery Vipin ◽  
Preeti Dabadghao ◽  
Manoj Shukla ◽  
Aditya Kapoor ◽  
Arvind S. Raghuvanshi ◽  
...  

2006 ◽  
Vol 22 (6) ◽  
pp. 324-328 ◽  
Author(s):  
Yaprak Engin-Üstün ◽  
Yusuf Üstün ◽  
M. Mutlu Meydanli ◽  
Ayşe Kafkasli ◽  
Gülay Yetkin

2013 ◽  
Vol 17 (2) ◽  
pp. 33-37 ◽  
Author(s):  
Evrim Çakır ◽  
Erman Çakal ◽  
Mustafa Özbek ◽  
Mustafa Şahin ◽  
Tuncay Delibaşı

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