Role of endothelin receptors and relationship with nitric oxide synthase in impaired erectile response in diabetic rats.
Andrologia
; 49(2)2017 Mar.
Article
em En
| MEDLINE
| ID: mdl-27145076
ABSTRACT
To evaluate the protective role of bosentan (BOS), an endothelin-1 (ET-1) receptor antagonist, and to show the changes in rats with experimentally induced diabetic erectile dysfunction (ED), a total of 24 albino Wistar rats were allocated into four groups. Group 1 was the healthy group and Group 2 had diabetes mellitus (DM) induced by intraperitoneal injection of 60 mg kg-1 streptozotocin (STZ). Following the establishment of DM, Group 3 and Group 4 were treated with oral BOS doses of 50 mg kg-1 and 100 mg kg-1 , respectively, for 60 days. At the end of the treatment, we evaluated yawning and erection response to apomorphine treatment and then the animals were sacrificed. ET-1, eNOS, iNOS, tumour necrosis factor (TNF)-α, ET-RA and ET-RB mRNA expressions were analysed in cavernosal tissue. It was observed that yawning and erection response decreased in the diabetic group; however, both of these improved with BOS treatment. While ET-1, TNF-α and iNOS gene expressions increased, eNOS, ET-RA and ET-RB gene expressions decreased in the DM group compared to the healthy group. DM has a negative impact on cavernosal tissue blood flow through activating vasoconstrictor mediators in cavernosal tissue. BOS regulates significantly eNOS, iNOS and TNF-α expressions in a dose-dependent manner.
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Base de dados:
MEDLINE
Assunto principal:
Sulfonamidas
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Ereção Peniana
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Diabetes Mellitus Experimental
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Antagonistas dos Receptores de Endotelina
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Disfunção Erétil
Limite:
Animals
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Humans
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Male
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article