Publication:
Effect of BCG vaccination on cytokine mRNA expression in atopic children with asthma

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2003

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BACKGROUND: To investigate whether a preexisting T(H2)-type immune response could be suppressed by BCG immunization in atopic children with asthma. METHODS AND RESULTS: We have used PCR to amplify reverse transcribed (RT) IFN-gamma and IL-5 mRNA expressed by peripheral blood mononuclear cells (PBMCs) in response to in vitro phytohemagglutinin A, purified protein derivative and Dermatophagoides pteronyssinus II stimulation from nine atopic children, both before and 8 weeks after BCG vaccination. We have demonstrated that IFN-gamma expression was induced in response to all stimulants (IFN-gamma/beta-actin) after the vaccination, whereas there was no expression before (P<0.001). Although there was a tendency to diminish in the expression of IL-5 mRNA in response to the stimulants, only PHA rendered a statistically significant decrease after the vaccination. CONCLUSIONS: These results provide some evidence of TH1 dominance after BCG administration in atopic children.

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Humans, Animals, Child, Cytokines, Asthma, Tuberculin, Hypersensitivity, Immediate, BCG Vaccine, Leukocytes, Mononuclear, Phytohemagglutinins, Gene Expression, Reverse Transcriptase Polymerase Chain Reaction, RNA, Messenger, Antigens, Dermatophagoides, Immunoblotting

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https://hdl.handle.net/11424/249697

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