PROPERTIES OF FATIGUE BETWEEN SLOW AND FAST MUSCLES OF MALE AND FEMALE DIABETIC RATS
Abstract
Background: The metabolic disorder of Type 2 Diabetes Mellitus (T2DM) has deleterious effects on skeletal muscle contractile functions. This study aimed to compare parameters of fatigue between slow and fast skeletal muscles of male and female type 2 diabetic Sprague-Dawley rats. Methodology: This was a quasi experimental study conducted at Army Medical College Rawalpindi and National Institute of Health, Islamabad. Forty Sprague Dawley rats in good health were split into groups I (Control) and II (Diabetics) of 20 rats each. Each group had 10 male and 10 female rats. Diabetic groups were given intra-peritoneal streptozotocin (STZ), 35 mg/Kg body weight on 15th day. Control groups were fed a normal diet and diabetic rats were given diet with high fat. On 21st day body weight, blood glucose and triglyceride/high density lipoprotein ratio were estimated to confirm extraction of type 2 diabetes mellitus. Intact Soleus and Extensor Digitorium Longus muscles were removed and fixed in organ bath system having Krebs-Ringer buffer solution and connected to data acquisition unit (iWorx®) to study their fatigability parameters. Independent samples t-test was used for statistical analysis. Results: Slow and fast skeletal muscles in diabetic rats showed reduction in resistance to and recovery from fatigue. Fatigue parameters between male and female diabetic rats revealed no significant differences. Conclusion: Fatigue parameters do not differ between male and female diabetic rats.
Pak J Physiol 2023;19(1):7‒10
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