Abstract
Aim:
To explore whether local blockade of T-box expressed in T cells (T-bet) expression in the lungs could lead to airway inflammation.
Methods:
Twenty-four rats were randomly divided into 4 groups: saline group, ovalbumin (OVA)-sensitized group, nonsense group, and the antisense group. The OVA-sensitized rats were sensitized and challenged with OVA, and the rats in the nonsense and antisense groups were subjected to an aerosol delivery of the nonsense and antisense oligonucleotides (AS-ODN) of T-bet (0.1%, w/v). The levels of inter-feron-γ (IFN-γ), interleukin-4 (IL-4), and IL-5 in the bronchoalveolar lavage fluid (BALF) were detected by ELISA, and the mRNA and the protein expression of T-bet and GATA-3 genes were examined by in situ hybridization and Western blot analysis, respectively.
Results:
The expression of T-bet mRNA and protein in the lungs of the rats in the antisense group were inhibited effectively. The lungs of the rats in the antisense and OVA-sensitized groups showed eosinophil and lymphocyte inflammatory infiltration, and eosinophilia located predominantly around the airways. The number of GATA-3 mRNA-positive cells and the level of GATA-3 protein in the lungs of the rats in the antisense and the OVA-sensitized groups significantly increased. The level of IL-4 and IL-5 in the BALF in the antisense and OVA-sensitized groups were elevated, but the level of IFN-γ decreased markedly.
Conclusion:
Antisense ODN-induced local blockade of T-bet expression leads to airway inflammation with a selective alteration in patterns of cytokine expression and recruitment of eosinophil cells similar to that in the OVA-sensitized animals.
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Project supported by the Science Foundation from the State Administration of Traditional Chinese Medicine of China (No 04-05JQ03), and partly supported by the China Postdoctoral Science Foundation (No 2005037800).
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Wang, G., Liu, Ct., Wang, Zl. et al. Antisense oligonucleotides-induced local blockade of T-bet expression leads to airway inflammation in rats. Acta Pharmacol Sin 27, 561–567 (2006). https://doi.org/10.1111/j.1745-7254.2006.00323.x
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DOI: https://doi.org/10.1111/j.1745-7254.2006.00323.x
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