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M9550107.TXT
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1995-03-04
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Document 0107
DOCN M9550107
TI Overexpression of IL-10 in atopic dermatitis. Contrasting cytokine
patterns with delayed-type hypersensitivity reactions.
DT 9505
AU Ohmen JD; Hanifin JM; Nickoloff BJ; Rea TH; Wyzykowski R; Kim J; Jullien
D; McHugh T; Nassif AS; Chan SC; et al; Division of Dermatology,
University of California, School of; Medicine, Los Angeles 90024.
SO J Immunol. 1995 Feb 15;154(4):1956-63. Unique Identifier : AIDSLINE
MED/95138541
AB The skin lesions of patients with atopic dermatitis provide a model to
study immunoregulation in human allergy. To determine the local cytokine
pattern of cells present (both endogenous and recruited) at the site of
disease, we extracted RNA from skin biopsy specimens from patients with
atopic dermatitis, allergic contract dermatitis, and positive tuberculin
reactions and used PCR to assay for cytokine mRNA. cDNAs were normalized
to the intensity of the CD3 delta PCR product as a marker of T cell
mRNA. We found overexpression of IL-10 mRNA in atopic dermatitis
lesions, in comparison with allergic contact dermatitis lesions and
tuberculin reactions. In contrast, IL-4 mRNA was most strongly expressed
in allergic contact dermatitis lesions and IFN-gamma mRNA was the
predominant cytokine in tuberculin reactions. Using an anti-IL-10 mAb
with immunoperoxidase, we localized IL-10 protein to large mononuclear
cells in the dermal infiltrate of atopic lesions. After immunomagnetic
sorting of mononuclear cell populations from PBMC of atopic dermatitis
subjects, IL-10 mRNA as measured by PCR was found to be strongly
expressed in CD14+ cells. Spontaneous release of IL-10 from PBMC-derived
adherent cells was greater in atopic dermatitis donors than normal
controls. We therefore renormalized skin biopsy cDNA according to the
level of beta-actin PCR product, as a marker of total cellular mRNA, and
found by PCR that IL-10 was nevertheless greatest in atopic dermatitis
subjects. We conclude that the relative overexpression of IL-10 in
atopic dermatitis greatest in atopic dermatitis subjects. We conclude
that the relative overexpression of IL-10 in atopic dermatitis may
contribute to the up-regulation of humoral responses and the
down-regulation of Th1 responses.
DE Adult Aged Aged, 80 and over Biopsy Dermatitis,
Atopic/GENETICS/*METABOLISM Dermatitis, Contact/GENETICS/METABOLISM
DNA, Complementary/GENETICS Female Gene Expression Human
Hypersensitivity, Delayed/*IMMUNOLOGY Interferon Type
II/BIOSYNTHESIS/GENETICS Interleukin-10/*BIOSYNTHESIS/GENETICS
Interleukins/BIOSYNTHESIS/GENETICS Male Middle Age
Monocytes/IMMUNOLOGY/METABOLISM Polymerase Chain Reaction RNA,
Messenger/ANALYSIS Skin/PATHOLOGY Skin Tests Support, Non-U.S. Gov't
Support, U.S. Gov't, P.H.S. Th2 Cells/IMMUNOLOGY/METABOLISM
Tuberculosis, Pulmonary/GENETICS/METABOLISM JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).