Altered inflammatory, oxidative, and metabolic responses to exercise in pediatric obesity and type 1 diabetes

Authors

  • Jaime S Rosa,

    Corresponding author
    1. Department of Pharmacology, School of Medicine, University of California, Irvine, CA, USA
    2. Institute for Clinical Translational Science, Department of Pediatrics, University of California, Irvine, CA, USA
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  • Stacy R Oliver,

    1. Department of Pharmacology, School of Medicine, University of California, Irvine, CA, USA
    2. Institute for Clinical Translational Science, Department of Pediatrics, University of California, Irvine, CA, USA
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  • Rebecca L Flores,

    1. Institute for Clinical Translational Science, Department of Pediatrics, University of California, Irvine, CA, USA
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  • Jerry Ngo,

    1. Institute for Clinical Translational Science, Department of Pediatrics, University of California, Irvine, CA, USA
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  • Ginger L Milne,

    1. Division of Clinical Pharmacology, Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN, USA
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  • Frank P Zaldivar,

    1. Institute for Clinical Translational Science, Department of Pediatrics, University of California, Irvine, CA, USA
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  • Pietro R Galassetti

    1. Department of Pharmacology, School of Medicine, University of California, Irvine, CA, USA
    2. Institute for Clinical Translational Science, Department of Pediatrics, University of California, Irvine, CA, USA
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Jaime S. Rosa, BS, Department of Pharmacology, School of Medicine, 1305 Hewitt Hall, 843 Health Science Court, University of California, Irvine, CA 92697-1385, USA.
Tel: (949) 824-3353;
fax: (949) 824-3360;
e-mail: jsrosa@uci.edu

Abstract

Rosa JS, Oliver SR, Flores RL, Ngo J, Milne GL, Zaldivar FP, Galassetti PR. Altered inflammatory, oxidative, and metabolic responses to exercise in pediatric obesity and type 1 diabetes.

Obesity (Ob) and type 1 diabetes (T1DM) are associated with increased inflammation and oxidative stress, which are major pathogenetic pathways toward higher cardiovascular risks. Although long-term exercise protects against systemic inflammation and oxidation, acute exercise actually exerts pro-inflammatory and oxidative effects, prompting the necessity for better defining these molecular processes in at-risk patients; in particular, very little is known regarding obese and T1DM children. We therefore examined key inflammatory and oxidative stress variables during exercise in 138 peripubertal children (47 Ob, 12.7 ± 0.4 yr, 22 F, BMI% 97.6 ± 0.2; 49 T1DM, 13.9 ± 0.2 yr, 20 F, body mass index% [BMI] 63.0 ± 3.6; 42 healthy, CL, 13.5 ± 0.5 yr, 24 F, BMI% 57.0 ± 3.6), who performed 10 bouts of 2-min cycling ∼80% VO2max, separated by 1-min rest intervals. Blood samples were drawn at baseline and peak exercise. Ob displayed elevated baseline interleukin-6 (IL-6, 2.1 ± 0.2 pg/mL, p < 0.005) vs. CL (1.5 ± 0.3), whereas T1DM displayed the greatest maximum exercise-induced change in IL-6 (1.2 ± 0.3) than in both Ob (0.7 ± 0.1, p < 0.001) and CL (0.6 ± 0.1, p < 0.0167). Myeloperoxidase (MPO) was elevated in T1DM (143 ± 30 ng/mL, p < 0.0167) vs. CL (89 ± 10) and Ob (76 ± 6), whereas increases in exercise only occurred in Ob and CL. Disparate baseline and exercise responses were also observed for 8-hydroxy-2′-deoxyguanosine, glutathione, and F2-isoprostane. This data show distinct patterns of dysregulation in baseline and adaptive immunologic and oxidative responses to exercise in Ob and T1DM. A full understanding of these alterations is required so that developing exercise regimens aimed at maximizing health benefits for specific dysmetabolic states can be achieved based on complete scientific characterization rather than empirical implementation.

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