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KMID : 1038820210240040377
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Pediatric Gastroenterology, Hepatology & Nutrition
2021 Volume.24 No. 4 p.377 ~ p.383
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Effector Memory CD8+ and CD4+ T Cell Immunity Associated with Metabolic Syndrome in Obese Children
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Yang Da-Hee
Lee Hyun-Ju
Lee Na-Eun
Shin Min-Sun
Kang In-Soo
Kang Ki-Soo
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Abstract
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Purpose: We investigated the association of effector memory (EM) CD8+ T cell and CD4+ T cell immunity with metabolic syndrome (MS).
Methods: Surface and intracellular staining of peripheral blood mononuclear cells was performed. Anti-interleukin-7 receptor-alpha (IL-7Rα) and CX3CR1 antibodies were used to stain the subsets of EM CD8+ T cells, while anti-interferon-gamma (IFN-γ), interleukin-17 (IL-17), and forkhead box P3 (FOXP3) antibodies were used for CD4+ T cell subsets.
Results: Of the 47 obese children, 11 were female. Children with MS had significantly higher levels of serum insulin (34.8±13.8 vs. 16.4±6.3 μU/mL, p<0.001) and homeostasis model assessment of insulin resistance (8.9±4.1 vs. 3.9±1.5, p<0.001) than children without MS. Children with MS revealed significantly higher frequencies of IL-7Rαlow CD8+ T cells (60.1 ±19.1% vs. 48.4±11.5%, p=0.047) and IL-7RαlowCX3CR1+ CD8+ T cells (53.8±20.1% vs. 41.5 ±11.9%, p=0.036) than children without MS. As the serum triglyceride levels increased, the frequency of IL-7RαlowCX3CR1+ and IL-7RαhighCX3CR1? CD8+ T cells increased and decreased, respectively (r=0.335, p=0.014 and r=?0.350, p=0.010, respectively), in 47 children. However, no CD4+ T cell subset parameters were significantly different between children with and without MS.
Conclusion: In obese children with MS, the changes in immunity due to changes in EM CD8+ T cells might be related to the morbidity of obesity.
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KEYWORD
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Child, Obesity, Metabolic syndrome, Hypertriglyceridemia, CD4, CD8, T-Lymphocytes
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