Masood Saleem Mir; Mohammad Maqbool Darzi; Omer Khalil Baba; Hilal Musadiq Khan; Shayaib Ahmad Kamil; Asif Hassan Sofi; Sarfraz Ahmad Wani
Abstract
Background & Objectives: Streptozotocin (STZ) is used for induction of Type-1 diabetes mellitus in animal models. Its beta-cytotoxic action results in sudden release of insulin leading to severe hypoglycaemia and even mortality. However, its sensitivity varies with species. Present investigation ...
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Background & Objectives: Streptozotocin (STZ) is used for induction of Type-1 diabetes mellitus in animal models. Its beta-cytotoxic action results in sudden release of insulin leading to severe hypoglycaemia and even mortality. However, its sensitivity varies with species. Present investigation was aimed at studying STZ induced acute clinical effects in rabbits. Methods: Streptozotocin@ 65 mg/kg b.w.was administered to thirteenNew Zealand White rabbits, 1-1.5 kg body weight, as single intravenous dose in 1mL citrate buffer, pH 4.6. Blood glucose levels were recorded before drug administration and then at 20 min, 1h, and hourly up to 9 hours post-treatment followed by intravenous and oral glucose therapy. Clinical signs were noted. Results: STZ caused immediate hyperglycaemia up to 4 hours, and then progressively severe hypoglycaemia up to 9 hours. Hypoglycaemia caused characteristic behavioural alterations including lethargy, dullness, sitting quietly but appearing alert, followed by aesthesia and then muscular weakness with characteristic postural changes starting from drooping of head and torticollis, Rabbits recovered following glucose therapy. Marked individual variations in response vis-a-vis onset and severity of glycaemic changes were observed. Conclusion: STZ induced a characteristic multiphasic immediate response in rabbits similar to one reported in other rodents. Behavioural changes were characteristic of hypoglycaemia warranting early management in order to avoid fatalities. How to cite this article: Saleem Mir M, Maqbool Darzi M, Baba OK, Musadiq Khan H, Ahmad Kamil S, Sofi AH, et al. Streptozotocin Induced Acute Clinical Effectsin Rabbits (Oryctolagus cuniculus). Iran J Pathol. 2015;10(3):206-13.
Shahriar Ahmadpour; Hossein Haghir; Yousef Sadeghi
Volume 3, Issue 1 , January 2008, , Pages 1-4
Abstract
Background and Objectives: Hippocampal volume reduction has been reported in diabetes mellitus type 1. It is believed that hyperglycemia and oxidative stress mediate neuropathological changes in hippocampal neurons. In this study we aimed to study the effect of insulin and an antioxidant like ...
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Background and Objectives: Hippocampal volume reduction has been reported in diabetes mellitus type 1. It is believed that hyperglycemia and oxidative stress mediate neuropathological changes in hippocampal neurons. In this study we aimed to study the effect of insulin and an antioxidant like ascorbic acid on preventing volume changes of dentate gyrus and CA3 region of hippocampus. Materials and Methods: This study was carried out on male Wistar rats. Experimental diabetes was induced by intraperitoneal injection of streptozotocin (80 mg/kg). Control animals (C) received only saline. Six weeks later diabetic rats were divided into four groups as follows: diabetic (D), diabetic/insulin (D/Ins), diabetic/insulin + ascorbic acid (D/Ins+AA), and diabetic/ascorbic acid (D/AA). Treatments were continued for two weeks. At the end of treatment course, the hippocampi were removed and dentate gyrus and CA3 region volumes were measured using Cavalieri principle. Results: STZ diabetic rats showed a reduction in DG and CA3 volumes. The volume of DG and CA3 in D and D/AA groups showed a reduction in comparison with control group (p<0.01). However, the volumes of DG and CA3 in groups D/Ins and D/Ins+AA showed no significant difference related to control group (p>0.05). Conclusion: Our findings showed that insulin administration reverse volume reduction of dentate and CA3 region.