Abstract:
:Aim. Our aim was (1) to determine the frequency of insulin resistance (IR) in patients with Duchenne/Becker muscular dystrophy (DMD/BMD), (2) to identify deleted exons of DMD gene associated with obesity and IR, and (3) to explore some likely molecular mechanisms leading to IR. Materials and Methods. In 66 patients with DMD/BMD without corticosteroids treatment, IR, obesity, and body fat mass were evaluated. Molecules involved in glucose metabolism were analyzed in muscle biopsies. Results show that 18.3%, 22.7%, and 68% were underweight, overweight, or obese, and with high adiposity, respectively; 48.5% and 36.4% presented hyperinsulinemia and IR, respectively. Underweight patients (27.3%) exhibited hyperinsulinemia and IR. Carriers of deletions in exons 45 (OR = 9.32; 95% CI = 1.16-74.69) and 50 (OR = 8.73; 95% CI = 1.17-65.10) from DMD gene presented higher risk for IR than noncarriers. We observed a greater staining of cytoplasmic aggregates for GLUT4 in muscle biopsies than healthy muscle tissue. Conclusion. Obesity, hyperinsulinemia, and IR were observed in DMD/BMD patients and are independent of corticosteroids treatment. Carriers of deletion in exons 45 or 50 from DMD gene are at risk for developing IR. It is suggested that alteration in GLUT4 in muscle fibers from DMD patients could be involved in IR.
journal_name
Int J Endocrinoljournal_title
International journal of endocrinologyauthors
Rodríguez-Cruz M,Sanchez R,Escobar RE,Cruz-Guzmán Odel R,López-Alarcón M,Bernabe García M,Coral-Vázquez R,Matute G,Velázquez Wong ACdoi
10.1155/2015/867273subject
Has Abstractpub_date
2015-01-01 00:00:00pages
867273eissn
1687-8337issn
1687-8345journal_volume
2015pub_type
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