Systemic Administration of Immunostimulatory DNA Sequences Mediates Reversible Inhibition of Th2 Responses in a Mouse Model of Asthma

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• 作者：David H. Broide ; Greg Stachnick ; Diego Castaneda ; Jyothi Nayar ; Marina Miller ; Jae Youn Cho ; Mark Roman ; Jose Zubeldia ; Tomoko Hyashi and Eyal Raz
• 关键词：IL ; 5 ; eosinophils ; interferon ; ; asthma ; CpG motif
• 刊名：Journal of Clinical Immunology
• 出版年：2001
• 出版时间：2001
• 年：2001
• 卷：21
• 期：3
• 页码：175-182
• 全文大小：47 KB

文摘

This study investigated whether immunostimulatory DNA sequences (ISS) induce a transient or sustained inhibition of Th2 responses to inhaled antigen. We sensitized mice with subcutaneous injections to develop a Th2 response to ovalbumin (ova) and then administered a dose of ISS prior to ova inhalation challenge. Mice were then rechallenged with ova by inhalation a second time at varying time points after the first ova inhalation (1 to 8 weeks later) to determine whether the ISS dose administered prior to the first ova inhalation protected against a subsequent second ova inhalation challenge. A single dose of ISS inhibited the Th2 response to the first inhalation of ova antigen, as well as 4 weeks later to the second inhalation of ova. However, ISS did not inhibit a Th2 response to the second inhalation of ova 8 weeks later. The reversible inhibition of Th2 responses at 8 weeks suggests the need for repeated ISS administration at monthly intervals.