27 October 2015 : Animal Research
Effect of Intermittent Hypoxia and Rimonabant on Glucose Metabolism in Rats: Involvement of Expression of GLUT4 in Skeletal MuscleXiaoya WangCE, Qin YuA, Hongmei YueDF, Shuang ZengBC, Fenfen CuiBC
Med Sci Monit 2015; 21:3252-3260
BACKGROUND: Obstructive sleep apnea (OSA) and its main feature, chronic intermittent hypoxia (IH) during sleep, is closely associated with insulin resistance (IR) and diabetes. Rimonabant can regulate glucose metabolism and improve IR. The present study aimed to assess the effect of IH and rimonabant on glucose metabolism and insulin sensitivity, and to explore the possible mechanisms.
MATERIAL AND METHODS: Thirty-two rats were randomly assigned into 4 groups: Control group, subjected to intermittent air only; IH group, subjected to IH only; IH+NS group, subjected to IH and treated with normal saline; and IH+Rim group, subjected to IH and treated with 10 mg/kg/day of rimonabant. All rats were killed after 28 days of exposure. Then, the blood and skeletal muscle were collected. We measured fasting blood glucose levels, fasting blood insulin levels, and the expression of glucose transporter 4 (GLUT4) in both mRNA and protein levels in skeletal muscle.
RESULTS: IH can slow weight gain, increase serum insulin level, and reduce insulin sensitivity in rats. The expressions of GLUT4 mRNA, total GLUT4, and plasma membrane protein of GLUT4 (PM GLUT4) in skeletal muscle were decreased. Rimonabant treatment was demonstrated to improve weight gain and insulin sensitivity of the rats induced by IH. Rimonabant significantly upregulated the expression of GLUT4 mRNA, PM GLUT4, and total GLUT4 in skeletal muscle.
CONCLUSIONS: The present study demonstrates that IH can cause IR and reduced expression of GLUT4 in both mRNA and protein levels in skeletal muscle of rats. Rimonabant treatment can improve IH – induced IR, and the upregulation of GLUT4 expression may be involved in this process.
Keywords: Cannabinoid Receptor Antagonists - chemistry, Blood Glucose - analysis, Anoxia, Gene Expression Regulation, Glucose - metabolism, Glucose Transporter Type 4 - metabolism, Immunohistochemistry, Insulin Resistance, Muscle, Skeletal - metabolism, Piperidines - therapeutic use, Pyrazoles - therapeutic use, Random Allocation, Receptor, Cannabinoid, CB1 - metabolism, Sleep Apnea, Obstructive - drug therapy
12 September 2022 : EditorialEditorial: Treatment with Dual Incretin Receptor Agonists to Maintain Normal Glucose Levels May Also Maintain Normal Weight and Control Metabolic Dysfunction-Associated Fatty Liver Disease (MAFLD)
Med Sci Monit 2022; 28:e938365
16 September 2022 : Review articleEffects of Physiotherapy on Rehabilitation and Quality of Life in Patients Hospitalized for COVID-19: A Rev...
Med Sci Monit In Press; DOI: 10.12659/MSM.938141
12 September 2022 : Clinical ResearchEffect of Vitamin D Concentration on Course of COVID-19
Med Sci Monit In Press; DOI: 10.12659/MSM.937741
29 August 2022 : Database AnalysisTranscriptome Analysis of Peripheral Blood Mononuclear Cells Response in Patients with Severe COVID-19 Reve...
Med Sci Monit 2022; 28:e937532
26 Sep 2022 : Clinical ResearchDistribution and Determinants of Plasma Homocysteine Levels in a Preconception Population: A Retrospective ...
Med Sci Monit In Press; DOI: 10.12659/MSM.937987
26 Sep 2022 : Clinical ResearchLatency and Interpeak Interval Values of Auditory Brainstem Response in 73 Individuals with Normal Hearing
Med Sci Monit In Press; DOI: 10.12659/MSM.937847
23 Sep 2022 : Review articleA Review of the Role of Ultrasound Radiomics and Its Application and Limitations in the Investigation of Th...
Med Sci Monit In Press; DOI: 10.12659/MSM.937738
Most Viewed Current Articles
30 Dec 2021 : Clinical ResearchRetrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...
Med Sci Monit 2021; 27:e935379
13 Nov 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit 2021; 27:e932788
08 Mar 2022 : Review articleA Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...
Med Sci Monit 2022; 28:e936292