Alefacept reduces infiltrating T cells, activated dendritic cells, and inflammatory genes in psoriasis vulgaris

Francesca Chamian, Michelle A. Lowes, Shao Lee Lin, Edmund Lee, Toyoko Kikuchi, Patricia Gilleaudeau, Mary Sullivan-Whalen, Irma Cardinale, Artemis Khatcherian, Inna Movitskaya, Knut M. Wittkowski, James G. Krueger

Research output: Contribution to journalArticlepeer-review

204 Scopus citations


Psoriasis vulgaris, a skin disease that is considered to be the result of a type 1 autoimmune response, provides an opportunity for studying the changes that occur in a target-diseased tissue during innovative immunotherapies. To gain a more comprehensive picture of the response to an approved biological therapy, we studied alfacept, which is a CD2 binding fusion protein. We examined T cells, dendritic cells (DCs), and expression of a number of inflammatory genes. In 22 patients, 55% demonstrated a clear histological remission of the disease, with a 73% reduction in lesional lymphocytes and a 79% decrease in infiltrating CD8+ cells. Only histological responders showed marked reductions in the tissue expression of inflammatory genes IFN-γ, signal transducer and activator of transcription 1, monokine induced by IFN-γ, inducible NO synthase, IL-8, and IL-23 subunits. Parallel decreases in CD83 + and CD11c+ DCs also were measured by immunohistochemistry. Because we observed that alefacept binds primarily to T cells and not DCs, we suggest that T cells are the primary target for therapy, but that DCs and a spectrum of type 1 inflammatory genes are coordinately suppressed.

Original languageEnglish (US)
Pages (from-to)2075-2080
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number6
StatePublished - Feb 8 2005
Externally publishedYes


  • Amevive
  • Autoimmune disease
  • CD2

ASJC Scopus subject areas

  • General


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