CTLA4Ig-mediated blockade of T-cell costimulation in patients with psoriasis vulgaris

Judith R. Abrams, Mark G. Lebwohl, Cynthia A. Guzzo, Brian V. Jegasothy, Michael T. Goldfarb, Bernard S. Goffe, Alan Menter, Nicholas J. Lowe, Gerald Krueger, Michael J. Brown, Russell S. Weiner, Martin J. Birkhofer, Garvin L. Warner, Karen K. Berry, Peter S. Linsley, James G. Krueger, Hans D. Ochs, Susan L. Kelley, Sewon Kang

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Abstract

Engagement of the B7 family of molecules on antigen-presenting cells with their T cell-associated ligands, CD28 and CD 152 (cytotoxic T lymphocyteassociated antigen-4 [CTLA-4]), provides a pivotal costimulatory signal in T-cell activation. We investigated the role of the CD28/CD152 pathway in psoriasis in a 26-week, phase I, open-label dose-escalation study. The importance of this pathway in the generation of humoral immune responses to T cell-dependent neoantigens, bacteriophage πX174 and keyhole limpet hemocyanin, was also evaluated. Forty-three patients with stable psoriasis vulgaris received 4 infusions of the soluble chimeric protein CTLA4Ig (BMS- 188667). Forty-six percent of all study patients achieved a 50% or greater sustained improvement in clinical disease activity, with progressively greater effects observed in the highest-dosing cohorts. Improvement in these patients was associated with quantitative reduction in epidermal hyperplasia, which correlated with quantitative reduction in skin-infiltrating T cells. No markedly increased rate of intralesional T-cell apoptosis was identified, suggesting that the decreased number of lesional T cells was probably likely attributable to an inhibition ofT-cell proliferation, T-cell recruitment, and/or apoptosis of antigen-specific T cells at extralesional sites. Altered antibody responses to T cell-dependent neoantigens were observed, but immunologic tolerance to these antigens was not demonstrated. This study illustrates the importance of the CD28/CD152 pathway in the pathogenesis of psoriasis and suggests a potential therapeutic use for this novel immunomodulatory approach in an array oft cell-mediated diseases.

Original languageEnglish (US)
Pages (from-to)1243-1252
Number of pages10
JournalJournal of Clinical Investigation
Volume103
Issue number9
DOIs
StatePublished - May 1999

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ASJC Scopus subject areas

  • Medicine(all)

Cite this

Abrams, J. R., Lebwohl, M. G., Guzzo, C. A., Jegasothy, B. V., Goldfarb, M. T., Goffe, B. S., Menter, A., Lowe, N. J., Krueger, G., Brown, M. J., Weiner, R. S., Birkhofer, M. J., Warner, G. L., Berry, K. K., Linsley, P. S., Krueger, J. G., Ochs, H. D., Kelley, S. L., & Kang, S. (1999). CTLA4Ig-mediated blockade of T-cell costimulation in patients with psoriasis vulgaris. Journal of Clinical Investigation, 103(9), 1243-1252. https://doi.org/10.1172/JCI5857