EFFECTS OF PITYROSPORUM-OVALE ON PROLIFERATION, IMMUNOGLOBULIN (IGA, G, M) SYNTHESIS AND CYTOKINE (IL-2, IL-10, IFN-GAMMA) PRODUCTION OF PERIPHERAL-BLOOD MONONUCLEAR-CELLS FROM PATIENTS WITH SEBORRHEIC DERMATITIS
K. Neuber et al., EFFECTS OF PITYROSPORUM-OVALE ON PROLIFERATION, IMMUNOGLOBULIN (IGA, G, M) SYNTHESIS AND CYTOKINE (IL-2, IL-10, IFN-GAMMA) PRODUCTION OF PERIPHERAL-BLOOD MONONUCLEAR-CELLS FROM PATIENTS WITH SEBORRHEIC DERMATITIS, Archives of dermatological research, 288(9), 1996, pp. 532-536
The aetiology of seborrhoeic dermatitis (SD) is still unknown, An incr
eased number of Pityrosposurm ovale in lesional skin of patients with
SD has been suggested to play a crucial role in the pathogenesis of th
e disease since double-blind trials with antifungal drugs (e.g. ketoco
nazole) have shown that these agents result in a significantly reduced
disease intensity, The frequent association of HIV infection and SD m
ay be due to a suppressed cell-mediated immunity. In order to characte
rize the role of the humoral and cellular immune response in patients
with SD the effects of a P. ovale extract on the proliferation of, and
interleukin-2 (IL-2), IL-10 by an interferon-gamma (IFN gamma) produc
tion, 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 respon
ded with a significantly increased proliferation to P. ovale antigen,
whereas cells from patients with SD did not, Additionally, IL-2 and IF
N gamma production by PBMC from patients with SD was markedly depresse
d compared with normal cells after stimulation with P. ovale, However,
stimulation of PBMC from SD patients with P. ovale antigen induced si
gnificantly increased IL-10 synthesis, IgA, IgG and IgM synthesis was
significantly increased in cultures of PBMC from patients with SD whet
her the cells were antigen-stimulated or not, Our results support the
assumption that strong skin colonization with P. ovale in SD is due to
an altered cellular immunity, which may be induced by increased IL-10
secretion.