Effect of Testosterone on Memory and BDNF Levels of Hippocampus in Gonadectomized Diabetic Rats

Sonabarkabi Zanjani; Faribamirzaei Bavil; Mostafa Mohammadi; Leila Chodadi; Mehranmesgari Abbasi; Mohammad Mohammadzaeh

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Effect of Testosterone on Memory and BDNF Levels of Hippocampus in Gonadectomized Diabetic Rats

Volume 8, Number 2

Sonabarkabi Zanjani¹, Faribamirzaei Bavil², Mostafa Mohammadi², Leila Chodadi2, Mehranmesgari Abbasi³, Mohammad Mohammadzaeh⁴, Samad Nazemi⁴* and Parviz Shahabi^5*

1Tabriz University of Medical Sciences, International Branch Aras, Tabriz, Iran. 2Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. 3Drug Applied Research Center of Tabriz University of Medical Sciences, Tabriz, Iran. 4Cellular and Molecular Research Center, Faculty of Medical Sciences, Sabzevar University of Medical Sciences, Sabzevar, Iran. 5Neuroscience Research Center of Tabriz University of Medical Sciences (NSRC), Tabriz, Iran.

DOI : http://dx.doi.org/10.13005/bpj/831

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ABSTRACT:

Induction of angiogenesis in the damaged area can be usefulin diabetic neuropathy. Various factors can be effective on angiogenesis,such as steroid hormones. We investigatedeffect of testosterone ona the signaling pathway of angiogenesis in sciatic nerve( AKT/ERK pathways).Twenty four wistar rats (250-300 g)were subdivided randomly in four groups (n=6): 1) diabetic (D),(streptozotocin,50 mg/kg, IP), 2) diabetic gonadectomized (D+GDX), diabetes was induced aftergonadectomy. 3) diabetic with testosterone (D+T), after induction of diabetes, testosterone(2mg/kg/day, SC, for 6 weeks). 4) diabetic gonadectomized with testosterone (D+GDX+T), after gonadectomy and induction of diabetes, testosterone was injected. ThenAKT and ERK proteins were measured. Forevaluation of angiogenesis was used from Immunostainingmethod( PECAM-1/ CD31).Testosterone decreased Akt protein in the diabetic and diabetic gonadectomized groupssignificantly (p<0.05).Also testosteronedecreased ERK protein in gonadectomized condition significantly(p<0.05). Testosterone treatment or gonadectomy had no significant effect on angiogenesis, but combination of testosterone and gonadectomy showed significant effect onangiogenesis(p<0.05).According to results, can be offered that testosterone decreased angiogenesis by reduction of AKT in sciatic nerve in diabetic condition.

KEYWORDS:

Angiogenesis; Diabetic Neuropathies; Sciatic; Testosterone