CD8α+α+ T cells in lesions and peripheral blood of patients with psoriasis
10.3760/cma.j.issn.0412-4030.2015.04.003
- VernacularTitle:银屑病患者皮损和外周血中CD8α+α+T细胞的研究
- Author:
Xiuwen SUN
;
Bing LI
;
Weigang ZHANG
;
Erle DANG
;
Liang JIN
;
Gang WANG
- Publication Type:Journal Article
- Keywords:
Psoriasis;
CD8-positive T-lymphocytes;
Interferon-gamma;
Tumor necrosis factor-alpha
- From:
Chinese Journal of Dermatology
2015;48(4):229-232
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the distribution and proportion of CD8α+α + T cells in lesions and peripheral blood of patients with psoriasis,and to assess their roles in the pathogenesis of psoriasis.Methods An immunofluorescence assay was performed to observe the distribution of CD8α+α+ T cells in lesions of 5 patients with progressive psoriasis vulgaris and normal skin of 5 healthy human controls.Flow cytometry was conducted to determine the proportion of CD8α+α+ T cells,and to measure the expressions of interferon (IFN)-γ and tumor necrosis factor (TNF)-α in peripheral blood from 10 patients with progressive psoriasis vulgaris and 8 healthy human controls.Statistical analysis was carried out by t test with GraphPad Prism software.Results A massive infiltrate mainly composed of CD8α+α+ T cells but not CD8α+β+ T cells was observed in the upper dermis of lesions from the 5 patients with psoriasis,while there was no infiltrate of CD8α+β+ or CD8α+α+ T cells in the normal skin of 5 healthy human controls.Flow cytometry revealed that the proportion of CD8α+α+ T cells was significantly higher in peripheral blood from 10 patients with psoriasis than in that from 8 healthy human controls (26.47％ ± 12.99％ vs.9.12％ ± 4.80％,t =3.96,P＜ 0.001).Significant differences were also noted between the psoriatic patients and healthy human controls in the percentage of cells secreting IFN-γ (47.36％ ± 19.38％ vs.13.44％ ± 9.21％,t =4.54,P ＜ 0.001) and cells secreting TNF-α (54.14％ ± 21.14％ vs.34.03％ ± 17.22％,t =2.17,P ＜ 0.05) in peripheral blood CD8α+α+ T cells.Conclusions Both the distribution and proportion of CD8α+α+ T cells are increased in lesions and peripheral blood from patients with psoriasis,suggesting that CD8α+α+ T cells may be the main subgroup of CD8+ T cells that contribute to the pathogenesis of psoriasis.
