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HIV-associated psoriasis.

E Mallon1, C B Bunker

  • 1Department of Dermatology, Imperial College School of Medicine, Chelsea & Westminster Hospital, London, U.K.

AIDS Patient Care and Stds
|June 2, 2000
PubMed
Summary
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Psoriasis occurs frequently in individuals with human immunodeficiency virus (HIV). HIV-associated psoriasis may be triggered by immune dysregulation in genetically predisposed individuals, involving CD8+ T lymphocytes and HLA-Cw*0602.

Area of Science:

  • Immunology
  • Dermatology
  • Virology

Background:

  • Psoriasis affects HIV-infected individuals at a significant rate, presenting a paradox given treatments targeting T lymphocytes.
  • The immunodysregulation caused by HIV infection is of interest for understanding psoriasis pathogenesis and therapy.
  • The exact causes of psoriasis are unknown, but genetic and environmental factors, along with autoimmune processes, are implicated.

Purpose of the Study:

  • To investigate the behavior and immunological basis of psoriasis in the context of HIV infection.
  • To explore the role of T lymphocytes, specifically CD4+ versus CD8+ T lymphocytes, in HIV-associated psoriasis.
  • To examine the potential genetic predisposition, such as the HLA-Cw*0602 allele, in triggering psoriasis in HIV-infected individuals.

Main Methods:

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  • Analysis of psoriasis behavior in HIV-infected individuals.
  • Review of immunological factors, including T lymphocyte roles (CD4+ and CD8+).
  • Investigation of genetic associations, particularly human leucocyte antigen (HLA) class I and the Cw*0602 allele.

Main Results:

  • Psoriasis occurs with notable frequency in HIV-infected individuals.
  • HIV-induced immunodysregulation may trigger psoriasis in genetically susceptible individuals carrying the Cw*0602 allele.
  • A human leucocyte antigen (HLA) class I association in HIV-associated psoriasis supports a significant role for CD8+ T lymphocytes.

Conclusions:

  • HIV-associated psoriasis involves complex interactions between viral immunodysregulation, genetic predisposition (HLA-Cw*0602), and T lymphocyte responses.
  • CD8+ T lymphocytes, potentially recognizing microbial peptides via HLA class I, play a crucial role in the immunopathogenesis of HIV-associated psoriasis.
  • Understanding these mechanisms is vital for developing effective therapeutic strategies for psoriasis in HIV-infected patients.