Archives of Dermatological Research

, Volume 288, Issue 9, pp 532–536 | Cite as

Effects ofPityrosporum ovale on proliferation, immunoglobulin (IgA, G, M) synthesis and cytokine (IL-2, IL-10, IFNγ) production of peripheral blood mononuclear cells from patients with seborrhoeic dermatitis

  • Karsten Neuber
  • Sven Kröger
  • Elvira Gruseck
  • Dietrich Abeck
  • Johannes Ring
Original Paper


The aetiology of seborrhoeic dermatitis (SD) is still unknown. An increased number ofPityrosposurm ovale in lesional skin of patients with SD has been suggested to play a crucial role in the pathogenesis of the disease since double-blind trials with antifungal drugs (e.g. ketoconazole) have shown that these agents result in a significantly reduced disease intensity. The frequent association of HIV infection and SD may be due to a suppressed cell-mediated immunity. In order to characterize the role of the humoral and cellular immune response in patients with SD the effects of aP. ovale extract on the proliferation of, and interleukin-2 (IL-2), IL-10 by an interferon-γ (IFNγ) production, and immunoglobulin (IgA, IgG, IgM) synthesis by peripheral blood mononuclear cells (PBMC) from patients with SD were studied in vitro. Healthy volunteers served as controls. PBMC from normal donors responded with a significantly increased proliferation toP. ovale antigen, whereas cells from patients with SD did not. Additionally, IL-2 and IFNγ production by PBMC from patients with SD was markedly depressed compared with normal cells after stimulation withP. ovale. However, stimulation of PBMC from SD patients withP. ovale antigen induced significantly increased IL-10 synthesis. IgA, IgG and IgM synthesis was significantly increased in cultures of PBMC from patients with SD whether the cells were antigen-stimulated or not. Our results support the assumption that strong skin colonization withP. ovale in SD is due to an altered cellular immunity, which may be induced by increased IL-10 secretion.

Key words

Seborrhoeic dermatitis Cellular immunity Pityrosporum ovale Cytokines Immunoglobulins 


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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Karsten Neuber
    • 1
  • Sven Kröger
    • 1
  • Elvira Gruseck
    • 1
  • Dietrich Abeck
    • 1
  • Johannes Ring
    • 1
  1. 1.Department of Dermatology and AllergologyUniversity Hospital Hamburg-EppendorfHamburgGermany

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