A Study of the Correlation between Angiotensin (1-7) and the Histopathological Changes in the Penises of Experimentally Diabetic Rats ()
Affiliation(s)
1Dermatology, Venereology and Andrology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
2Pathology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
3Medical Physiology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
ABSTRACT
Background: Diabetes mellitus is an important risk factor for erectile dysfunction. Renin-angiotensin system with its branches Angiotensin II and Angiotensin 1-7 [Ang-(1-7)] are altered in diabetes and could affect erection. So, in this study we determine the level of Ang-(1-7), nitrite (the major nitric oxide metabolite) and histopathological changes in penile tissues of type I diabetic rats. A total of 60 male albino rats were divided into two groups: group I (control) and group II (diabetic) for either 4 weeks in group IIa, or 8 weeks in group IIb. Diabetes was induced by intraperitoneal injection of streptozotocin (60 mg/kg). Penile levels of Ang-(1-7), nitrite and histopathological examination were assessed at 4 and 8 weeks after diabetes induction. Results: Ang-(1-7) and nitrite were decreased in diabetic rats at 4 weeks and continued to be lower at 8 weeks for Ang-(1-7) only. Loss of corpus cavernosum smooth muscle was present in 25% and 85% of rats at 4 and 8 weeks of diabetes respectively (P < 0.001). The loss of smooth muscle was replaced by dense fibrous tissue and was correlated positively with the reduced Ang-(1-7). Conclusion: Diabetes induced progressive decrease in the release of Ang-(1-7) and nitric oxide from the corpora cavernosa in a time-dependent manner with concomitant fibro-muscular changes that end by corporal fibrosis affecting subsequently erectile functions.
Share and Cite:
Kamshoushi, A. , Sobhy, N. , Helal, S. , Hassaan, P. and Omar, H. (2018) A Study of the Correlation between Angiotensin (1-7) and the Histopathological Changes in the Penises of Experimentally Diabetic Rats.
Open Journal of Endocrine and Metabolic Diseases,
8, 81-92. doi:
10.4236/ojemd.2018.83009.
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