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.     

银屑病和白癜风患者外周血CD4+CD25+调节性T细胞的检测

目的: 检测CD4+CD25+调节性T细胞(Treg)在白癜风和银屑病患者外周血中的表达.方法: 用流式细胞术检测19例白癜风患者、18例银屑病患者及19名正常人外周血中CD4+CD25+Treg的表达水平.结果: 白癜风患者的CD4+CD25+Treg表达率为(1.056±0.662)%,低于正常对照组(2.022±0.98)%,差异有统计学意义(P＜0.05);银屑病患者的CD4+CD25+Treg为(1.761±1.396)%,与正常人无显著性差异(P＝0.177).结论: CD4+CD25+Treg细胞在白癜风患者外周血中数量明显减少.     

慢性荨麻疹患者甲状腺功能状况与CD4~+CD25~+T细胞水平关系的研究

目的探讨慢性荨麻疹(CU)发病与甲状腺功能及CD4~+CD25~+调节性T细胞水平之间的关系。方法采用化学发光法分别检测CU患者和健康对照组血清中甲状腺过氧化物酶抗体(TPOAb)和甲状腺球蛋白抗体(TGAb)水平,流式细胞仪测定2组受试者外周血中CD4~+CD25~+T细胞的表达水平,并观察其与CU发病的相关性。结果CU患者血清中TGAb阳性率15%、TGAb和/或TPOAb阳性率25%均分别高于健康对照组的2%和10%,差异有统计学意义(P0.05);与健康对照组比较,CU患者外周血CD4~+CD25~+T细胞表达水平显著增高,差异有统计学意义(P0.05)。结论慢性荨麻疹患者存在甲状腺功能异常与细胞免疫功能异常,三者之间可能存在一定的相关性。     

散发型白癜风患者外周血CD4~+/CD8~+T细胞比值及CD4~+CD25~+T细胞的检测

目的检测散发型白癜风患者外周血CD4+/CD8+T细胞比值及CD4+CD25+调节性T细胞水平,探讨其与散发型白癜风发病的关系。方法散发型白癜风患者29例,男13例,女16例。通过流式细胞仪对散发型白癜风患者外周血CD4+/CD8+T细胞比值及CD4+CD25+调节性T细胞水平进行检测,并与20例健康人相比较。结果与健康对照组相比,散发型白癜风患者外周血中CD4+/CD8+T细胞比值的差异无统计学意义(P0.05),而CD4+CD25+调节性T细胞水平明显减少,差异有统计学意义(P0.05),但在不同病程的患者中CD4+CD25+调节性T细胞数量的差异无统计学意义(P0.05)。结论散发型白癜风患者外周血中存在CD4+CD25+调节性T细胞水平下降,可能与散发型白癜风的发生发展有一定关系。     

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。     

慢性荨麻疹患者外周血中CD8~+CD28~-T细胞检测结果分析

目的:探讨CD8~+CD28~-T细胞在慢性荨麻疹患者致病机制中的作用。方法:收集临床慢性荨麻疹(CU)病例83例,同时设立对照组64例进行比较。应用ELISA法检测研究对象血清中抗Ig E抗体、抗FcεRⅠ抗体浓度,流式细胞仪检测外周血中CD3~+、CD4~+、CD8~+、CD8~+CD28~-、CD4~+CD25~+T细胞比例,分析检测结果。结果:83名CU中,23例抗Ig E抗体为阳性,占27.7%(27/83);31例抗FcεRⅠ抗体为阳性,占37.3%(31/83)。CU患者外周血CD8~+T细胞比例、CD8~+CD28~-T细胞比例低于正常对照组(P0.05),CD4~+/CD8~+比值、CD4~+CD25~+T细胞比例均高于对照组(P0.05)。结论:CU患者机体外周血CD8~+CD28~-T细胞、CD4~+CD25~+T细胞比例与对照组相比存在差异,CD8~+CD28~-T细胞比例降低也可能是CU致病机制之一。     

CD4+CD25+T细胞和NK细胞与SLE病情活动相关性的研究

目的: 了解CD4+CD25+T细胞和NK细胞与SLE病情活动的相关性.方法: 用流式细胞仪检测17例SLE患者治疗前后和11例正常人外周血中CD3+T(总T)、CD4+T、CD8+T、NK细胞、CD4+CD25+T、CD4+CD25-T细胞.结果: SLE活动期CD8+T细胞百分率升高(P<0.05),导致CD4+/CD8+比例降低(P<0.05),CD4+CD25+T、NK细胞百分率明显降低(P<0.01),而CD3+T、CD4+T细胞、CD4+CD25-T细胞百分率无明显改变(P>0.05);治疗后患者SLEDAI评分下降而NK细胞和CD4+CD25+T细胞百分率均明显上升(均P<0.01);SLEDAI评分与CD4+CD25+T细胞百分率有相关性(P<0.05).结论: SLE存在CD4+T、CD8+T细胞亚群分布和活化的异常;CD4+CD25+T细胞数量明显降低,且量的变化与疾病活动相关;NK细胞数量虽然也明显降低,治疗后也上升,但量的变化与疾病活动无明显相关.     

白塞病患者外周血CD4+CD25+调节性T细胞的检测及其临床意义

目的检测白塞病(BD)患者外周血Cd4+ CD25+调节性T细胞数量变化并分析其与疾病活动性的关系,探讨其临床意义.方法利用流式细胞仪和单克隆荧光抗体技术测定31例BD患者和27例健康对照者外周血中CD4+CD25+调节性T细胞在CD3+Cd4+细胞中的比例.结果活动期患者外周血中CD4+CD25+调节性T细胞在CD3+CD4+细胞中的百分率(6.43%±2.54%),低于健康对照者(8.17%±2.87%)(P＜0.05).非活动期患者外周血中CD4+CD25+调节性T细胞在CD3+ CD4+细胞中的百分率(8.35%±2.31%),略高于健康对照者(P＞0.05).结论BD患者外周血中CD4+CD25+调节性T细胞在CD3+CD4+细胞中的比例降低与疾病活动相关.通过检测外周血CD4+CD25+调节性T细胞在CD3+ CD4+细胞中的比例来评估机体免疫状态是一个可行的办法.     

斑秃患者外周血CD4+CD25+Foxp3调节性T细胞及T淋巴细胞亚群的测定

目的 研究斑秃患者外周血中CD4+CD25+调节性T细胞数量及CD4+、CD8+ T淋巴细胞亚群数量与斑秃疾病严重程度的关系。方法 对斑秃进行病情分组，以流式细胞仪检测17例重度、15例局限型斑秃患者和25例正常人对照者外周血中有功能活性的CD4+CD25+调节性T细胞（即CD4+CD25+ Foxp 3 T 细胞）在CD4+ T淋巴细胞中的比率，CD4+和CD8+占T淋巴细胞的比率。 结果 重度斑秃患者外周血中有功能活性的CD4+CD25+ Foxp 3 T细胞占CD4+ T细胞比率为0.54% ± 0.31%，显著低于正常人对照组（3.21% ± 0.76%）及局限型斑秃患者（2.71% ± 0.37%，P ＜ 0.001）；与正常人对照组比较，差异无统计学意义（P ＞ 0.05）。重度斑秃患者的CD4+占T淋巴细胞的比率为32.61% ± 3.48%，显著低于正常人对照组（43.0% ± 3.63%，P ＜ 0.001），而CD8+占T淋巴细胞的比率为40.96% ± 8.54%，显著高于正常人对照组（25.23% ± 2.14%，P ＜ 0.001）。局限型斑秃患者的此两项指标分别为41.25% ± 4.27%和26.6% ± 2.28%，与对照组差异无统计学意义（P ＞ 0.05）。重度斑秃患者的CD8+占T淋巴细胞的比率与CD4+CD25+ Foxp 3调节性 T 细胞占CD4+ T细胞的比率有负相关关系（r ＝ －0.94，P ＜ 0.001）。结论 重度斑秃可能与外周血中CD4+CD25+ T细胞数量的减少和功能活性的降低有关。     

系统性红斑狼疮患者外周血中T细胞CD4CD25的表达

目的了解CD4,CD25在系统性红斑狼疮患者外周血T细胞中的表达水平及其临床意义。方法用流式细胞术检测30例正常人和30例活动期系统性红斑狼疮(SLE)患者外周血中T细胞CD4,CD25的表达水平,根据CD25表达荧光强度>100者为T细胞CD4+CD25+bright,并与SLE活动指数评分(SLEDAI)进行相关分析。结果SLE患者外周血T细胞CD4+CD25+表达率为(8.82±2.98)%,显著低于对照组(12.24±5.71)%(P<0.05);患者组T细胞CD4+CD25bright表达率为(1.56±0.76)%,低于对照组(2.23±1.22)%(P<0.05),差异有统计学意义;SLE患者外周血T细胞CD4+CD25+、T细胞CD4+CD25bright表达率与SLEDAI评分两者之间无相关性;r分别为-0.156,-0.153,P均>0.05)。结论SLE患者外周血中T细胞CD4+CD25+减少,其可能在发病机制中起一定的作用,低水平T细胞CD4+CD25bright在SLE发病中的确切作用机制有待进一步阐明。     

CD4+ CD56+ hematodermic neoplasm

We report a case of a 75-year-old man with a cutaneous CD4+CD56+ hematodermic neoplasm. CD4+CD56+ hematodermic neoplasms are rare and commonly present as cutaneous lesions. This is an important diagnosis in the differential diagnosis of cutaneous hematologic malignancies because of the extremely poor prognosis.     

Gemcitabine-associated CD8+ CD30+ pseudolymphoma

We describe a 69-year-old man with a non-small cell carcinoma of the lung, stage III B, who developed bilateral multiple erythematous lesions in the abdominal-inguinal area following treatment with gemcitabine. Histologically, the lesion was characterized by a heavy lymphocytic infiltrate with large CD30+ cells. The lesion was highly suggestive of cutaneous involvement by malignant lymphoma, but complete regression was observed after cessation of gemcitabine. Although rarely reported, gemcitabine therapy can induce skin lesions. Pathologists should be aware of this possibility in order to avoid a misdiagnosis.     

CD2- CD4+ CD56+ hematodermic/hematolymphoid malignancy

BACKGROUND: CD2- CD4+ CD56+ lymphoid malignancy has been only rarely reported the last 5 years. It is characterized by a high incidence of cutaneous involvement, cytologically agranular cells, aggressive clinical course, and negative Epstein-Barr virus (EBV) involvement. OBSERVATION: We describe a Japanese patient with a unique hematolymphoid malignancy characterized by an involvement of skin, nasopharyngeal region, bone marrow, lymph node, and a CD4+ CD43+ CD56+ CD2- CD3- CD8- and terminal deoxynucleotidyl transferase phenotype. Clinically, the cutaneous eruptions were purplish, hard, multiple nodules. Histologically, a massive proliferation of atypical pleomorphic cells with medium-sized nuclei were observed throughout the dermis. No clonal rearrangement of T-cell receptor (TCR)-beta gene or immunoglobulin heavy chain J gene was found, and no positive identification of EBV by in situ hybridization for EBV-encoded small nuclear RNA was found. The patient underwent high-dose chemotherapy with autografting of peripheral blood stem cells; however, the tumors quickly relapsed. CONCLUSION: We gathered data from 17 cases of lymphoid malignancy from the literature sharing immunophenotypic and genotypic features similar to those of our case, including CD2- CD4+ CD56+ and germline rearrangement of TCR. Although the cellular origin could not be decided, this malignancy was found to have 100% affinity for skin, a short course, and poor prognosis.     

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.     

脓毒症患者CD14+CD16+单核细胞的作用探讨

目的观察脓毒症患者外周血单核细胞CD14+CD16-、CD14+CD16+、CD14-CD16+三个亚群表达HLA-DR、CD14、CD16的异同,并分析CD14+CD16+单核细胞的特点。方法选取67例脓毒症患者为脓毒症组和15例健康志愿者作为对照组,脓毒症组根据疾病严重程度分为脓毒症（15例）、重症脓毒症（41例）和脓毒性休克组（11例）,收集临床资料,计算APACHE II评分,流式细胞仪检测单核细胞各亚群CD14、CD16、HLA-DR的表达。结果脓毒症患者CD14+CD16+单核细胞数目较正常对照组显著升高（P＜0.01）;脓毒症患者单核细胞HLA-DR、CD14平均荧光强度均较健康对照组明显降低,并随着脓毒症患者病情由轻到重而逐渐下降;各组中CD14+CD16+单核细胞相对高表达HLA-DR、CD14;单核细胞HLA-DR表达与临床指标间存在较好的相关关系。结论①脓毒症患者单核细胞HLA-DR表达显著降低;②CD14+CD16+单核细胞在脓毒症发病的免疫机制中可能起到重要作用。     

Defective functions of circulating CD4+CD25+ and CD4+CD25- T cells in patients with chronic ordinary urticaria

BACKGROUND: Patients with chronic ordinary urticaria (CU) are divided into two groups: 30-50% have chronic autoimmune urticaria, and the remainder have chronic idiopathic urticaria. CD4(+)CD25(+) regulatory T (Treg) cells play critical roles in maintaining peripheral tolerance and preventing autoimmunity, but the characteristics of Treg cells have not yet been defined in CU. OBJECTIVE: To identify whether CD4(+) T cells play an important immunoregulatory role in the etiology of CU, we determined the frequencies and functions of circulating CD4(+)CD25(+) and CD4(+)CD25(-) T cells in CU patients and healthy control subjects, with special focus on the characteristics of CD4(+)CD25(+) T cells. METHODS: Peripheral blood mononuclear cells (PBMCs) were obtained from CU and healthy controls in this study. The frequency of CD4(+)CD25(+) T cells in PBMCs was detected by flow cytometry. The expression levels of forkhead box P3 (FOXP3) and transforming growth factor-beta (TGF-beta) in CD4(+)CD25(+) T cells were detected by real-time PCR. Furthermore, the suppressive function of CD4(+)CD25(+) T cells was analyzed. Additionally, the Th1/Th2 cytokine secretory profile in mitogen-stimulated CD4(+)CD25(-) T cells was measured by ELISA. RESULTS: An increased frequency of CD4(+)CD25(+) T cells was observed in CU patients (n=19) compared to control subjects (n=7). No significant difference was detected in the expression levels of FOXP3 or TGF-beta between CU patients (n=14) and control subjects (n=7). Strikingly, the suppressive capacity of CD4(+)CD25(+) Treg cells from 2 of 5 CU patients was partially defective. We also found that cytokine production from CD4(+)CD25(-) T cells was significantly reduced in CU patients (n=9) compared to healthy donors (n=11). CONCLUSIONS: Our data demonstrate that CD4(+)CD25(+) and CD4(+)CD25(-) T cells in PBMCs exhibit defective functions in CU patients.     

CD4~+ CD25~+调节性T细胞与寻常型银屑病

CD4~+CD25~+Treg是近年来日益受关注的T细胞亚群之一,参与维持机体免疫内环境的稳定。研究表明,该亚群T细胞在包括寻常型银屑病在内的多种自身免疫紊乱性皮肤病的发病中发挥重要作用。该领域的进一步研究将对深入探索其他自身免疫性疾病的发病机理和防治策略有着深远的意义。