immune system
• the decreased delayed type hypersensitivity response to antigen rechallenge and the decreased IFN-gamma secretion by T cells isolated from the draining lymph nodes to these rechallenged areas demonstrate a defective Th1 response
• defective class switching of antigen-specific immunoglobulin to IgG2a gives further evidence of a defective Th1-response
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• antigen rechallenge in the lung leads to slightly less periarterial inflammation than in controls
• there is significant attenuation of airway hyperresponsiveness in these mice upon antigen rechallenge in the lung
• the number of cells isolated from BAL fluid in these aerosol rechallenged mice is one-third of controls
• the level of antigen-specific IgG2a in aerosol sensitized mice is markedly reduced
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• antigenic challenge after prior sensitization leads to 4-fold less swelling in the footpads compared to controls
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• T cells isolated from the draining lymph nodes of mice rechallenged with antigen produce significantly less IFN-gamma than controls
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hematopoietic system
• the decreased delayed type hypersensitivity response to antigen rechallenge and the decreased IFN-gamma secretion by T cells isolated from the draining lymph nodes to these rechallenged areas demonstrate a defective Th1 response
• defective class switching of antigen-specific immunoglobulin to IgG2a gives further evidence of a defective Th1-response
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