Glucometabolic effects of single and repeated exposure to forced-swimming stress in Sprague-Dawley rats

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dc.contributor.authorMorakinyo, AO
dc.contributor.authorIranloye, BO
dc.contributor.authorOgunsola, OA
dc.date.accessioned2019-08-31T11:15:38Z
dc.date.available2019-08-31T11:15:38Z
dc.date.issued2018
dc.description.abstractObjectives. We aimed to evaluate the effects of a single (acute) and repeated (chronic) exposure to forced-swimming stressor on glucose tolerance, insulin sensitivity, lipid profile and glycogen content in male rats. Methods. Thirty adult male Sprague-Dawley rats (12 weeks old) were divided randomly into five groups: control group, single exposure (SE) to forced-swim stressor, repeated exposure to forced-swim stressor for 7 days (RE7), 14 days (RE14) and 28 days (RE28). Glucose tolerance test and Homeostatic Model Assessment-Insulin Resistance (HOMA-IR) were undertaken on fasting rats to obtain glucose and insulin profiles. ELISA was performed to assess plasma insulin and corticosterone levels. Total cholesterol, triglyceride, high- and low-density lipoproteins, hepatic and skeletal glycogen content were also determined. Results. Repeated exposure to stressor induced glucose intolerance and insulin resistance in the experimental rats. Results showed that all RE groups exhibited a significantly higher area under the curve compared with others (p=0.0001); similarly, HOMA-IR increased (p=0.0001) in all RE groups compared with control. Prolonged exposure to stressor significantly increased the plasma insulin and corticosterone levels but decreased the glycogen content in the liver and skeletal muscle when compared with the control group. Additionally, chronic stressor significantly increased the total cholesterol and triglyceride levels, however, acute stressor produced significantly elevated high-density lipoproteins level. Conclusions. In conclusion, repeated exposure to forced-swimming stressor induced glucose intolerance and insulin resistance in rats by disrupting the insulin sensitivity as well as heightening the glycogenolysis in the liver and skeletal muscle. Acute stressor was unable to cause glucose intolerance and insulin resistance but it appears that may have a positive effect on the lipid metabolism.en_US
dc.identifier.citationMorakinyo AO, Iranloye BO, Ogunsola OA. (2018) Glucometabolic effects of single and repeated exposure to forced-swimming stress in Sprague-Dawley rats. Endocrine Regulations 52(2): 101-108en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/4978
dc.subjectStressen_US
dc.subjectCorticosteroneen_US
dc.subjectInsulinen_US
dc.subjectGlucoseen_US
dc.subjectGlycogenen_US
dc.subjectLipid profileen_US
dc.titleGlucometabolic effects of single and repeated exposure to forced-swimming stress in Sprague-Dawley ratsen_US
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