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Effect of leukotriene receptor antagonist on expression and variation of TGF-beta in T lymphocyte for mild persistent asthma in children

Wenfang Dong, Xiaojian Zhou, Jianguo Hong
European Respiratory Journal 2011 38: p4828; DOI:
Wenfang Dong
Pediatrics, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
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Xiaojian Zhou
Pediatrics, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
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Jianguo Hong
Pediatrics, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
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Abstract

Objective: To investigate the role of TGF-β1 and action of montelukast (MT) in the pathogenesis of asthma in children.

Methods: A single-blind, placebo-controlled trail was conducted in 60 mild persistent asthma children (5-14 y). Patients were randomly assigned to receive 5mg MT or placebo for 12 weeks. 30 healthy children (5-14 y) were as control. Clinical and pulmonary function were assessed before and after treatment. The mRNA expression of TGF-β1 in PBMC cells, subtypes of FoxP3+CD4+ T cells and TGF-β1 in plasma were measured.

Result: After treatment, symptomes were improved with signigicant increase in pulmonary function in asthmatic, MT superior to placebo (p<0.05). The mRNA expression of TGF-β1 and TGF-β1 level in asthmatic were lower than that in control (0.312±0.07 vs 0.607±0.2, p<0.05 and 0.445±0.13 vs 0.32±0.04, p<0.05, respectively). Total FoxP3+CD4+ cell and CD45RA+Foxp3lo were higher in asthmatic (8.3%±1.3% vs 6.05%±1.8%, p=0.007 and 4.60%±1.04% vs 3.27%±1.03%, p=0.011, respectively). CD45RA-Foxp3hi was lower (0.75%±0.13% vs 0.93%±0.26%, p=0.021). After treatment, CD45RA-Foxp3hi was increased in MT compared to placebo group (1.16%±0.24% vs 0.89%±0.22%, p=0.01). TGF-β1 levels had no correlation with those levels of pulmonary function.

Conclusion: The expression of TGF-β1 was low in asthmatic children. Insufficient secretion of TGF-β1 and the defection in activating FoxP3+CD4+ Treg cells might play an important role in pathogenesis of asthma. Up-regulation of expression of TGF-β1 and induction of expression of CD45RA-Foxp3hi in Foxp3+CD4+Treg cells by MT may be one of the mechanisms by which airway inflammation is inhibited in asthma.

  • © 2011 ERS
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Effect of leukotriene receptor antagonist on expression and variation of TGF-beta in T lymphocyte for mild persistent asthma in children
Wenfang Dong, Xiaojian Zhou, Jianguo Hong
European Respiratory Journal Sep 2011, 38 (Suppl 55) p4828;

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Effect of leukotriene receptor antagonist on expression and variation of TGF-beta in T lymphocyte for mild persistent asthma in children
Wenfang Dong, Xiaojian Zhou, Jianguo Hong
European Respiratory Journal Sep 2011, 38 (Suppl 55) p4828;
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