Increased frequency of intracellular interleukin (IL)-13 and IL-10, but not IL-4, expressing CD4+ and CD8+ peripheral T cells of patients with atopic dermatitis

BACKGROUND: A number of studies exist demonstrating the increased expression of type 2 cytokines and decreased capacity to produce interferon-gamma (IFN-gamma) in peripheral blood mononuclear cells (PBMCs) of patients with atopic dermatitis (AD). OBJECTIVES: To clarify the results of recent studies concerning the role of interleukin (IL)-4 and IL-13 in PBMCs of AD patients, we analysed the activation status of lymphocyte subpopulations. METHODS: We measured the intracellular expression and serum levels of certain type 1 and type 2 cytokines, using cell surface and intracellular cytokine staining, flow cytometry and enzyme-linked immunosorbent assay techniques. RESULTS: The frequency of IL-10 and IL-13 producing CD4+ and CD8+ T cells was significantly higher in patients with AD, while the frequency of IFN-gamma secreting helper and cytotoxic T cells was significantly lower in patients with AD than in control subjects. The serum levels of IL-10 and IL-13 were also significantly increased. There were no significant differences observed between the experimental groups in the frequency of IL-4 producing CD4+ and CD8+ cells. CONCLUSIONS: This study demonstrates a type 2 cytokine production in the CD4+ and CD8+ T cells of AD patients, which is characterized by an elevated IL-13, but not by IL-4 secretion, and by an increased level of the immunoregulatory IL-10, which can contribute to a decrease in IFN-gamma expression.     

特应性皮炎患者外周血皮肤归巢的CD8+ T细胞研究

【摘要】 目的 探讨特应性皮炎（AD）患者外周血CD8+ T细胞皮肤归巢及杀伤功能相关蛋白的表达。 方法 15例AD患者和14例健康人,用流式细胞仪,检测外周血CD8+ T细胞、表达皮肤淋巴细胞相关抗原的CD8+ T细胞（CLA+CD8+ T细胞）的比例。 结果 CD8+ T细胞比例在AD组和对照组之间差异无统计学意义（P > 0.05）;CD8+ T细胞穿孔素、颗粒酶B和FasL的表达在两组间差异亦无统计学意义（均P > 0.05）。CLA+CD8+ T细胞比例在AD组（3.80% ± 1.46%）高于健康对照组（2.18% ± 0.85%）（t = 3.636,P < 0.01）,AD组CLA+CD8+ T细胞比例与SCORAD（SCORing of Atopic Dermatitis）评分呈正相关（r = 0.565,P < 0.05）;CCR4在CD8+ T细胞表达在AD组（13.86% ± 4.42%）高于健康对照组（9.50% ± 2.14%）（t = 3.738,P < 0.01）,而CCR10和CXCR6的表达在两组间差异均无统计学意义（P > 0.05）。CLA+CD8+ T细胞穿孔素的表达在AD组（74.27% ± 15.94%）高于健康对照组（57.20% ± 14.64%）（t = 2.998,P < 0.01）,颗粒酶B的表达在AD组（70.90% ± 13.85%）也高于健康对照组（56.41% ± 11.00%）（t = 3.104,P < 0.01）,而FasL的表达在两组间差异无统计学意义（P > 0.05）。CLA+CD8+ T细胞CCR4、CCR10和CXCR6的表达在AD组与对照组间差异无统计学意义（均P > 0.05）。 结论 AD患者外周血CLA+CD8+ T细胞数量增加,杀伤功能相关蛋白穿孔素、颗粒酶B的表达增强,可能参与了AD的发病。     

CD4+辅助性T细胞在特应性皮炎的研究进展

特应性皮炎是慢性复发性炎症性皮肤病,皮肤屏障功能破坏、金黄色葡萄球菌定植造成的持续抗原刺激、免疫细胞调节功能失衡是其发病的关键因素.免疫细胞调控网络结构复杂,其通过细胞因子合成分泌的相互调节、受体表达的相互调控、生物学效应的相互影响发挥重要作用.关于CD4+辅助性T细胞在特应性皮炎发病机制中的作用,近年来基础及临床研究均有进展.     

Imbalance of CD4+CD29+ and CD4+CD45RA+ T-helper cell subsets in peripheral blood of patients with severe atopic dermatitis

To determine the proportion of T-helper cell subsets in the peripheral blood we studied 16 patients with mild, moderate and severe atopic dermatitis. Lymphocytes were isolated from heparinized peripheral blood and analysed by two-colour flow cytometry. Patients with severe atopic dermatitis had a decreased CD4+CD29+CD4+CD45RA+ ratio (p<0.01). We found a decreased absolute number of CD4+CD29+ cells (p<0.05) and an increased absolute number of CD4+CD45RA+ cells (p<0.05) in the peripheral blood. No significant changes in the CD4+CD29+CD4+CD45RA+ ratio were found in the peripheral blood of patients with clinically mild or moderate atopic dermatitis.     

High frequency of IL-4-producing CD4+ allergen-specific T lymphocytes in atopic dermatitis lesional skin.

In atopic dermatitis (AD) hypersensitivity reactions to allergens are commonly observed and are assumed to make a major contribution in the pathomechanism of the disease. It may be expected that allergen-reactive Th cells play a central role in these reactions. In the present study the occurrence and function of allergen-specific T lymphocytes in dermal inflammatory lesions were studied. To this aim panels of randomly cloned CD4+ T cells from lesional skin biopsies of two housedust mite Dermatophagoides pteronyssinus (Dp)-allergic AD patients were screened for reactivity with Dp allergens. The results were compared with similar tests for Dp reactivity of T-lymphocyte clones (TLC) from the peripheral blood of these patients. In the panels of TLC generated from lesional skin (S-TLC), a considerable number of TLC appeared to be Dp-specific, 47% (n = 17) and 10% (n = 29), respectively. In the panels from the peripheral blood, the percentages of Dp-specific TLC were only 0% (n = 22) and 3% (n = 34), suggesting accumulation or expansion of these T cells in lesional skin. The function of these TLC was studied by assaying the secretion of IL-4 and IFN-gamma, which have been shown to be produced in aberrant ratios by Dp-specific TLC from the peripheral blood of AD patients (Wierenga et al: J Immunol 144:4651, 1990). All Dp-specific S-TLC produced IL-4 in combination with no or low levels of IFN-gamma, whereas many of the non-Dp-specific S-TLC and blood-derived TLC (B-TLC) were observed to produce high levels of IFN-gamma without significant amounts of IL-4. A functional consequence of these cytokine profiles was demonstrated by the finding that TLC producing substantial amounts of IL-4 enhanced expression of the low-affinity Fc receptor for IgE (CD23) on antigen-presenting cells to a greater extent than did IFN-gamma-producing TLC.     

特应性皮炎患者外周血CD4+CD25+调节性T细胞的检测

目的 探讨CD4+CD25+调节性T细胞（CD4+CD25+ Treg）在特应性皮炎（AD）发病中的作用机制及临床意义。方法 流式细胞仪分析AD患者外周血中CD4+CD25+ Treg细胞数量,实时荧光定量PCR检测外周血单核细胞（PBMC）中Foxp3 mRNA水平,ELISA检测血清中IL-2、IL-4、IL-10、IFN-γ水平。结果 AD患者外周血中CD4+CD25+ Treg细胞占CD3+ T细胞及CD4+ T细胞的比例均明显低于正常人对照组（t′ = 3.775、4.533,P值均 ＜ 0.01）;外周血中CD4+CD25+ Treg细胞占CD3+ T细胞比例在AD患者急性期明显低于慢性期（t = 2.217,P < 0.05）,而在急性期与亚急性期、亚急性期与慢性期之间差异均无统计学意义（t = 1.558、0.49,P值均 ＞ 0.05）。AD患者PBMC中Foxp3 mRNA的水平低于正常人对照组（z = -2.368,P ＜ 0.05）;其外周血中CD4+CD25+ Treg细胞与血清中IL-2和IL-10成正相关（r = 0.512、0.494,P值均 ＜ 0.05）,与IL-4和IFN-γ的相关性无统计学意义（r = -0.110、-0.237,P值均 ＞ 0.05）。结论 在AD患者中,外周血中CD4+CD25+ Treg细胞数量及Foxp3 mRNA水平均下降,从而可能减少对Th2细胞增生及其细胞因子分泌的抑制,使Th2占优势,参与AD的发病。     

特应性皮炎患儿血清和CD4+CD25+ T细胞分泌IL-10水平的检测

目的 探讨儿童特应性皮炎血清和CD4+CD25+T分泌细胞因子IL-10表达,分析其与病程及严重程度的相关性。 方法 特应性皮炎患儿按SCORAD指数分3组,轻度10例、中度16例、重度20例。抽取46例特应性皮炎患儿和31例健康对照儿外周血,用免疫磁珠分离获得CD4+CD25+T细胞,用ELISA法分别检测患病组和健康对照组血清及CD4+CD25+T细胞培养液IL-10水平,并分析IL-10水平与SCORAD评分的相关性。结果 轻、中、重度AD各组血清IL-10水平分别为（43.10 ± 25.07）、（68.40 ± 36.65）、（55.55 ± 41.97） pg/ml,与健康对照组（58.27 ± 36.84） pg/ml比较,差异均无统计学意义（P ＞ 0．05）,与患儿SCORAD评分无相关性。轻、中、重度AD组CD4+CD25+T细胞分泌IL-10含量分别为（52.96 ± 11.69）、（49.86 ± 9.18）、（27.25 ± 7.01） pg/ml,重度AD组低于健康对照组（55.15 ± 11.15） pg/ml （P < 0．05）;轻、中度组与健康对照组差异无统计学意义（P ＞ 0．05）。CD4+CD25+T细胞分泌IL-10的水平与患儿疾病严重程度SCORAD评分呈明显负相关（r值分别为-0．757,P < 0．01）。结论 CD4+CD25+T细胞及相关因子IL-10可能参与儿童特应性皮炎的发病。     

寻常型银屑病患者外周血CD4~+CD25~+及CD8~+CD25~+细胞的检测

目的研究进展期寻常型银屑病患者外周血CD4+CD25+和CD8+CD25+调节性T细胞的数量变化及其在银屑病免疫病理学发病机制中的作用。方法应用流式细胞术对进展期寻常型银屑病患者外周血CD4+CD25+和CD8+CD25+调节性T细胞进行检测。结果进展期寻常型银屑病外周血CD4+CD25+细胞及CD8+CD25+调节性T细胞数量与正常对照组相比,均显著降低(P<0.05,P<0.005),而CD4+CD25+/CD8+CD25+比值无显著性差异(P>0.05)。结论寻常型银屑病的发病与CD4+CD25+和CD8+CD25+调节性T细胞的同步降低有关,与二者的比值无关。     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

CD4+ memory T cells in peripheral blood are not decreased in patients with atopic dermatitis.

Atopic dermatitis (AD) is a severe and chronic eczematous skin disease, to which increased IgE levels and imbalances of CD4+ T cells are related. CD4+ T cells, however, are heterogeneous and include at least two subpopulations being designated as CD4+ naive and memory T cells. They represent sequential maturational stages (naive into memory) in CD4+ T cell development differing in function and phenotype. Of these two subpopulations the CD4+ memory T cell compartment is a potent producer of gamma-interferon which suppresses IgE synthesis in B cells. Therefore, we speculated whether an inborn maturation defect of CD4+ memory T cells causes the increased IgE production in AD. In patients with AD and age- and sex-matched controls (both n = 10) we analyzed the distribution of both subpopulations in peripheral blood by two-color flow cytometry using monoclonal antibodies against the CD4, CD45RA and CD29 antigen. We provide evidence that the numerical values of CD4+ memory T cells and CD4+ naive T cells are equivalent in both groups. This supports the view that functional disturbances of lymphocytes or lymphocyte subsets are responsible for IgE excess and the pathogenesis of AD.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

Objective To determine the level of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo at different stages and to study its relationship with the development of vitiligo. Methods Blood samples were collected from 34 outpatients with vitiligo, including 19 cases of progressive vitiligo and 15 cases of stable vitiligo, as well as from 20 normal human controls. Flow cytometry was used to detect the levels of peripheral CD4+ and CD4+CD25+ T lymphocytes in these samples. Results Compared with the controls, the percentage of CD4+CD25+ regulatory T lymphoeytes in peripheral lymphocytes was significantly lower in patients with progressive vitiligo than those in patients with stable vitiligo and normal human con-trois [(2.43±0.30)% vs (3.49±0.39)% and (3.34±0.24)%, both P <0.05], but no significant difference was found between patients with stable vitiligo and normal human controls (P＞0.05). A significantly nega-tive correlation was observed between the percentage of CD4+CD25+ regulatory T lymphocytes and lesion area in patients with progressive vitiligo (r = -0.48, P <0.05), but not in patients with stable vitiligo (P ＞0.05). There was no significant correlation between the course of disease and the percentage of peripheral CD4+CD25+ regulatory T lymphocytes in patients with progressive vitiligo or stable vitiligo (both P ＞ 0.05). Conclusion There is an abnormal proportion of peripheral CD4+CD25+ regulatory T lymphocytes in patients with vitiligo, which may be related to the development of vitiligo.     

白癜风患者外周血CD4+CD25+调节性T细胞的检测

目的 检测不同病期白癜风患者外周血CD4+CD25+调节性T细胞水平,探讨其与白癜风发病的关系.方法 白癜风患者34例,进展期19例,稳定期15例.通过流式细胞仪对不同病期白癜风患者外周血CD4+、CD4+CD25+T细胞水平进行检测,并与20例正常人比较.结果 进展期患者外周血中CD4+CD25+调节性T细胞占外周血淋巴细胞的表达率低于正常对照组(P<0.05);稳定期患者与正常对照组比,差异无统计学意义(P＞0.05);进展期患者低于稳定期患者,差异有统计学意义(P<0.05).进展期患者CD4+CD25+调节性T细胞占外周血淋巴细胞表达率与皮损面积呈负相关(P<0.05),稳定期则无相关性(P＞0.05).进展期与稳定期患者CD4+CD25+调节性T细胞占外周血淋巴细胞水平与病程均无明显相关性(P＞0.05).结论 白癜风患者外周血中存在异常比例的cD4+CD25+调节性T细胞,可能与白癜风的发病有关.