CD19
桥粒胶蛋白3
医学
流式细胞术
寻常性天疱疮
抗体
天疱疮
效价
桥粒蛋白
免疫学
体外
病理
外周血单个核细胞
生物
自身抗体
生物化学
作者
Huijie Yuan,Shengru Zhou,Zhicui Liu,Haiqin Zhu,Renchao Xu,Jie Zheng
出处
期刊:Chinese Journal of Dermatology
[Hospital for Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences]
日期:2018-04-15
卷期号:51 (4): 309-312
标识
DOI:10.3760/cma.j.issn.0412-4030.2018.04.015
摘要
Objective
To evaluate the specific antibody-producing capacity of locally infiltrating B lymphocytes in lesions of patients with pemphigus vulgaris (PV) .
Methods
Totally, 35 patients with PV and 22 healthy controls were enrolled into this study. Skin tissues were resected from blisters or erosions of the patients with PV, and from normal skin of healthy controls. Then, mononuclear cells were isolated from these skin tissues. Flow cytometry was performed to determine the percentages of lymphocytes, CD19+ B lymphocytes, and desmoglein (Dsg) 1- and Dsg3-specific CD19+ B lymphocytes. B lymphocytes isolated from the lesional skin of patients with PV were cultured in vitro. Enzyme-linked immunosorbent assay (ELISA) was conducted to determine titers of anti-Dsg1 and anti-Dsg3 antibodies in the cell culture supernatant. Receiver operating characteristic (ROC) curve analysis was conducted to calculate positive rates of anti-Dsg1 and anti-Dsg3 antibodies.
Results
The percentages of lymphocytes (17.95% ± 3.85%) and CD19+ B lymphocytes (4.27% ± 1.13%) were significantly higher in the lesional skin of PV patients than in the normal skin of healthy controls (7.83% ± 1.29%, 0.61% ± 0.31% respectively; t= 2.49, U= 13.00 respectively, both P < 0.05) . Among the CD19+ B lymphocytes in the lesional skin of PV patients, the percentage of CD19+IgG+ B cells was (38.33 ± 5.56) %, and percentages of Dsg1- and Dsg3-specific CD19+ B lymphocytes were 12.87% ± 1.267% and 10.42% ± 1.243% respectively. After the in vitro culture for 6 days, the titers of anti-Dsg1 and anti-Dsg3 antibodies in the cell culture supernatant were (4.89 ± 1.56) U/ml and (35.45 ± 13.03) U/ml respectively, with their positive rates being 85% (17/20) and 95% (19/20) respectively.
Conclusion
There are Dsg1- and Dsg3-specific B lymphocytes aggregating in the lesional skin of patients with PV, which can produce anti-Dsg1 and anti-Dsg3 antibodies after in vitro culture.
Key words:
Pemphigus; B-lymphocytes; Desmoglein 1; Desmoglein 3; Immunoglobulin G
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