未足月胎膜早破孕妇外周血CD4~+、CD8~+T淋巴细胞、NK细胞CD56水平及与绒毛膜羊膜炎的关系

目的探讨未足月胎膜早破(PPROM)孕妇外周血T淋巴细胞亚群CD4~+、CD4/CD8、CD8~+及自然杀伤细胞(NK)CD56水平与绒毛膜羊膜炎(HCA)的关系。方法选取2018年1月至2019年1月在河北省儿童医院住院分娩的50例PPROM孕妇作为研究对象。将这50例孕妇设为研究组,另选取50例正常孕妇设为对照组。使用流式细胞仪检测外周血中T淋巴细胞亚群CD4~+、CD4/CD8、CD8~+及NK细胞CD56水平,并用MRFlow流式细胞分析软件自动行淋巴细胞亚群CD4~+、CD4、CD8、CD8~+及NK细胞CD56绝对计数。研究组孕妇于产后将胎盘、胎膜送病理科,根据是否感染HCA分为非HCA组21例和HCA组29例。采用ROC曲线分析孕妇外周血T淋巴细胞亚群CD4~+、CD4~+/CD8~+、CD8~+及NK细胞CD56水平对HCA的预测价值。结果研究组孕妇外周血T淋巴细胞亚群CD4~+、CD4/CD8及NK细胞CD56水平均低于对照组孕妇,差异具有统计学意义(P0.05),CD8~+水平高于对照组孕妇,差异具有统计学意义(P0.05)。研究组HCA孕妇外周血T淋巴细胞亚群CD4~+、CD4~+/CD8~+及NK细胞CD56水平均明显低于非HCA孕妇,差异具有统计学意义(P0.05),CD8~+水平高于非HCA孕妇,差异具有统计学意义(P0.05)。HCA重度组孕妇外周血T淋巴细胞亚群CD4~+、CD4~+/CD8~+及NK细胞CD56水平最低、CD8~+水平最高,中度组次之,HCA轻度组孕妇外周血T淋巴细胞亚群CD4~+、CD4/CD8及NK细胞CD56水平最高、CD8~+水平最低,两两比较差异均具有统计学意义(P0.05)。外周血CD4~+、CD4~+/CD8~+、CD8~+及NK细胞CD56水平预测孕妇发生HCA的ROC曲线下面积分别为0.849、0.913、0.856、0.903,CD4~+/CD8~+诊断效能最佳,灵敏度为82.80%、特异度为90.50%。结论 PPROM孕妇外周血T淋巴细胞亚群CD4~+、CD4~+/CD8~+、CD8~+及NK细胞CD56水平与HCA发生、发展有关,及时检测上述指标有利于早期诊断HCA。     

带状疱疹患者CD_4~+T淋巴细胞亚群的检测

目的通过观察带状疱疹患者T细胞亚群的变化,分析机体免疫功能与患带状疱疹的相关性,揭示带状疱疹发病的规律和机理。方法采用流式细胞仪技术检测73例不同年龄和性别的带状疱疹患者T细胞亚群的分布情况,并选择88例健康体检者做为健康对照。结果带状疱疹患者血清CD4+T细胞显著降低,CD3+T细胞降低,CD8+T细胞升高,CD4/CD8比值有所下降;不同年龄和不同病程的患者间也存在T细胞亚群的明显差异。结论带状疱疹患者存在CD4+T细胞的降低和T细胞亚群免疫功能下降,其在带状疱疹的发生和发展中可能起重要作用;老年人是带状疱疹发病的危险人群。     

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。     

活动性皮肌炎CD4+CD25+CD127lo/-调节性T细胞的检测

皮肌炎(DM)是一种自身免疫性结缔组织病.CD4+CD25+调节性T细胞(Treg)是存在于人胸腺和外周血中的一类具有免疫抑制作用的T细胞亚群,该细胞数量减少或者功能异常均可导致自身免疫性疾病的发生.转录因子Foxp3是Treg细胞的特征性检测分子.研究发现,表面标志CD127(IL-7αR)的表达与Foxp3呈负相关,可以代替Foxp3作为Treg细胞的检测标志[1].为研究Treg细胞在活动性DM患者发病机制中的作用,我们分别对17例活动性DM患者和正常人对照外周血中的CD4+CD25+、CD4+CD25+CD127lo/-T细胞的百分比进行检测,同时与患者血清肌酸激酶(CK)含量进行相关性分析.并对其中7例住院患者给予糖皮质激素联合免疫抑制剂治疗,观察治疗后10 d,20 d CD4+CD25+和CD4+CD25+CD127lo/-T细胞百分比的变化.     

CD4+CD25+调节性T细胞与斑秃的关系

CD4+CD25调节性T细胞是T细胞中具有免疫调节功能的主要细胞群,在调节免疫应答和维持外周免疫耐受中起重要作用.CD4+CD25调节性T细胞的数量减少或功能缺失可能导致自身免疫病的发生.斑秃是一种T细胞介导的累及毛囊的器官特异性自身免疫性疾病.斑秃的动物实验和临床研究均发现,斑秃时存在CD4+CD25+调节性T细胞异常,提示CD4+CD25+调节性T细胞可能参与了斑秃的自身免疫发病机制.     

斑秃患者外周血T淋巴细胞亚群及CD4~+CD25~+调节T细胞的检测

目的检测斑秃(AA)患者外周血T淋巴细胞亚群及CD4+CD25+调节性T(Tr)细胞数量变化,分析AA的可能病因。方法利用流式细胞仪和单克隆荧光抗体技术,测定重度和局限性AA各40例患者外周血中T淋巴细胞亚群占T淋巴细胞的比率及CD4+CD25+Tr细胞在CD3+CD4+T淋巴细胞中的比率。结果重度AA患者外周血中CD4+CD25+Tr细胞占CD3+CD4+T细胞的比率为(1.43±0.74)%,显著低于正常对照组(2.25±0.97)%(P<0.01),重度AA患者的CD4+T占T淋巴细胞的比率为(31.42±6.66)%,略高于正常对照组(30.69±7.47)%(P>0.05),差异无显著性,而CD8+T占T淋巴细胞的比率为(25.86±4.35)%,明显高于正常对照组(22.42±6.10)%(P<0.01);局限性AA患者的三项指标分别为(2.14±0.87)%,(32.60±10.27)%和(21.59±5.24)%,与对照组差异无显著性(P>0.05)。结论AA患者外周血中CD4+CD25+Tr明显低于正常对照组,CD8+T比率明显高于正常对照组,可能是导致重度AA发病的主要免疫机制。     

寻常性银屑病患者外周血CD4+CD25+调节性T细胞的检测

调节性T细胞(CD4⁺CD25⁺Treg)是调节性T细胞亚群之一,具有多种独特的特征,包括可识别自身抗原肽、分泌抑制性细胞因子和维持免疫稳态等,在维持机体内环境的稳定、诱导移植耐受以及自身免疫性疾病的发生中发挥作用.     

白癜风患者外周血CD4~+CD25~+Foxp3~+和CD4~+CD25~+HLA-DR~+T细胞的测定

为了进一步研究调节性T细胞(Treg)在白癜风发病中的作用,我们对不同病期白癜风患者外周血CD4~+ T细胞中同时表达CD25和在Treg的发生与功能中处中心地位的义头转录因子p3(Foxp3)~([1-2])以及Treg的相天表型分子(HLA-DR)的百分比进行检测.     

慢性荨麻疹患者外周血CD4+CD25+调节性T细胞的表达

目的:探索调节性T细胞(regulatory T cells,Tregs)在慢性荨麻疹(CU)发病中的作用.方法:采用流式细胞术分别检测CU患者和健康人外周血CD3+、CD4+、CD8+、CD4+CD25+T细胞的表达水平.结果:与健康对照组比较,CU患者外周血CD3+T细胞比例无明显变化,CD4+T细胞增高(P ＜ 0.05),CD4+CD25+T细胞表达水平显著增高(P ＜ 0.01),CD8+T细胞数量降低(P ＜ 0.05),CD4+/ CD8+比值明显升高(P ＜ 0.05).自身血清皮肤试验(ASST)阳性组与阴性组的CU患者CD4+CD25+Tregs 细胞的数量无统计学差异.结论:CU患者外周血存在Treg细胞及其他T淋巴细胞亚群的数量异常和分化失衡,这一异常在CU发病中的作用值得进一步研究.     

红斑狼疮皮损中CD4~+、CD8~+ T细胞表达及其与Bcl-2关系的研究

目的:确定Bcl-2及CD4 、CD8 T细胞在红斑狼疮皮损区的表达并探讨其与红斑狼疮发病的关系.方法:采用免疫组化法对30例红斑狼疮皮损区T细胞亚群CD4 、CD8 T细胞及淋巴细胞Bcl-2进行检测,并与17例正常皮肤作对照.结果:红斑狼疮患者皮损中Bcl-2淋巴细胞和CD4 T细胞的表达明显高于正常对照组,而CD8 T细胞表达明显低于正常对照组;Bcl-2的表达与CD4 T细胞表达呈正相关,与CD8 T细胞表达呈负相关.结论:红斑狼疮皮损区淋巴细胞Bcl-2的表达增强可能会导致CD4 和CD8 T细胞凋亡异常,从而导致免疫紊乱而发病.     

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.     

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.     

Childhood mycosis fungoides with a CD8+ CD56+ cytotoxic immunophenotype

Primary cutaneous T‐cell lymphomas mostly occur in patients of middle and higher age. Their rarity and an oftentimes atypical clinical presentation in childhood as well as the reluctance of taking biopsies in children are reasons for a delayed diagnosis. We report the case of an 11‐year‐old boy with a 7‐year history of slowly progressive CD8+CD56+ mycosis fungoides of the cytotoxic immunophenotype. His trunk and extremities were affected by extensive pale‐erythematous patches and plaques with fine scaling. In addition, several poikilodermatous lesions were present on his thighs. Improvement was achieved by topical mometasone furoate treatment. On the basis of our observation, a brief review on cutaneous T‐cell lymphomas in childhood and on CD8+ subtypes in particular is given. Clinicopathological correlation is crucial for establishing the correct diagnosis and for estimation of the prognosis.