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  • Title: Dual role of anti-TNF therapy: enhancement of TCR-mediated T cell activation in peripheral blood and inhibition of inflammation in target tissues.
    Author: Bosè F, Raeli L, Garutti C, Frigerio E, Cozzi A, Crimi M, Caprioli F, Scavelli R, Altomare G, Geginat J, Abrignani S, Reali E.
    Journal: Clin Immunol; 2011 May; 139(2):164-76. PubMed ID: 21334981.
    Abstract:
    The impact of anti-TNF therapy on systemic immune responses in patients has not been clearly defined. Here, we examined Th1/Th2/Th17 cytokine expression, activation and proliferation of peripheral T cells from patients with psoriasis and inflammatory bowel disease before and during anti-TNF therapy. In parallel, we calculated the correlation with the clinical response and we monitored cytokine expression in biopsies from inflamed tissues. We evidenced a dual role of TNF-blockade. In peripheral blood, it increased the expression of cytokines such as IL-17, IL-10, and IFN-γ, and enhanced the expression of activation markers and the proliferative response of CD4 T cells to TCR stimulation. By contrast, in biopsies from target tissues, TNF-blockade diminished the expression of Th17/Th1 cytokine and early inflammatory genes. Importantly, the enhanced T cell responses to TCR-stimulation did not impair the clinical response to the therapy and, in responder patients, occurred with the concomitant down-regulation of inflammatory genes in the target tissues.
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