儿童免疫性血小板减少症IL-27、CD4~+CD45RA~+T及CD4~+CD45RO~+T细胞变化

目的检测免疫性血小板减少症患儿外周血细胞因子IL-27、CD4~+T细胞表面抗原CD45RA和CD45RO表达的变化,探讨其在ITP发病过程中的作用。方法新诊断ITP患儿35例,正常体检儿童35例作为对照,ELISA法检测血清IL-27水平、流式细胞术法检测外周血CD4~+T细胞CD45RA和CD45RO的表达率,采用t检验、直线相关分析进行比较。结果血清IL-27浓度ITP组(195.35±70.30)ng/L,对照组(301.25±125.40)ng/L,差异有统计学意义(P0.01);CD4~+CD45RA+T细胞表达率ITP组(26.34±5.58)%,对照组(30.56±5.35)%;CD4~+CD45RO~+T细胞表达率ITP组(55.12±7.85)%,对照组(48.45±6.74)%,差异均有统计学意义(P0.01);血清IL-27水平与外周血小板计数无相关性(r=0.202,P=0.575)。结论 IL-27、CD4~+CD45RA+T细胞和CD4~+CD45RO~+T细胞介导的细胞免疫异常可能参与了ITP发病。     

Distribution of naïve (CD45RA+) and memory (CD45RO+) T-cells in HIV-infected Puerto Rican population

HIV infection usually results in a gradual deterioration of the immune system. It is evident that early recognition of progression markers during HIV infection from asymptomatic to symptomatic state is needed. In the present cross-sectional study, peripheral blood lymphocytes from 63 HIV-infected Puerto Rican individuals were analyzed by two-color flow cytometry to study the co-expression CD45RA and CD45RO on both CD4+ and CD8+ T-cells and its correlation with age, gender, CD4 count, CD4:CD8 ratio, anti-retroviral therapy, clinical status, and viral load. Measurement of T-cell subsets in these patients showed an excessive increase of CD3+CD8+, CD8+CD45RA+, and CD8+CD45RO+ T-cells as disease progresses. In contrast, it was also observed a significant decrease in CD3+CD4+, CD4+CD45RA+ and CD4+CD45RO+ T-cells. The distribution of CD8+CD45RA+ T-cells did not change significantly between HIV and AIDS cases suggesting that this T-cell subset is not a good progression marker. Interestingly, CD4+CD45RA+ T-cells were significantly difference between genders, and CD44+CD45RA+ and CD8+CD45RO+ T-cells were influenced by age. In conclusion, the distribution of na?ve/memory CD4+ T-cells and memory CD8+ T-cells significantly correlate with HIV infection in disease progression. It is also important to mention that these T-cell subpopulations may be influenced by both gender and age. Overall, these results suggest that a loss in the generation of new immune response and function may be occurring during disease progression. This study open new windows of understanding that will be beneficial for future studies on immunopathogenesis, diagnosis, prognosis, and treatment monitoring for HIV/AIDS.     

Interferon gamma (IFN-γ) negative CD4+ and CD8+ T-cells can produce immune mediators in response to viral antigens

Evaluation of antigen-specific T-cell responses to viral antigens is frequently performed on IFN-γ secreting cells. However, T-cells are capable of producing many more functions than just IFN-γ, some of which, like Perforin, are associated with immune protection in HIV-1 disease elite controllers. We evaluated the extent of missed T-cell functions when IFN-γ secretion is used as a surrogate marker for further evaluation of T-cell functions. Intracellular cytokine staining assay and flow cytometry were used to assess peripheral blood mononuclear cells (PBMCs) from 31 HIV-infected ART-naive individuals for the extent to which gated CD4+ and CD8+ IFN-γ producing and non-producing T-cells also secreted IL-2, Perforin, and TNF-α functions. Similarly, the extent of missed virus-specific responses in IFN-γ ELISpot assay negative T-cells from 5 HIV-1 uninfected individuals was evaluated. Cells from HIV-infected individuals were stimulated with pooled consensus group M (Con M) peptides; and those from healthy individuals were stimulated with pooled adenovirus (Ad) peptides. Overall, frequencies of virus-specific IFN-γ secreting CD4+ and CD8+ cells were low. Proportions of IFN-γ negative CD4+ expressing IL-2, Perforin, or TNF-α to Con M were significantly higher (5 of 7 functional profiles) than the corresponding IFN-γ positive CD4+ (0 of 7) T-cell phenotype, p?=?0.02; Fisher’s Exact test. Likewise, proportions of CD8+ T-cells expressing other functions were significantly higher in 4 of the 7 IFN-γ negative CD8+ T-cells. Notably, newly stimulated Perforin, identified as Perforin co-expression with IL-2 or TNF-α, was significantly higher in IFN-γ negative CD8+ T-cell than in the positive CD8+ T-cells. Using SEB, lower responses in IFN-γ positive cells were most associated with CD4+ than CD8+ T-cells. These findings suggest that studies evaluating immunogenicity in response to HIV and Adenovirus viral antigens should not only evaluate T-cell responsiveness among IFN-γ producing cells but also among those T-cells that do not express IFN-γ.     

CD4+CD25+~(high)Treg细胞在妊娠中的作用的研究进展

免疫系统能够识别自己与非己,并且能够维持对自身组织的无应答状态,这种对自身抗原的免疫耐受的主要机制是胸腺内T细胞的阴性选择,即自身反应性T细胞克隆的清除,但是仍有一些自身反应性T细胞能够躲避这一过程并且识别外周自身抗原.     

桥本甲状腺炎(HT)外周血CD4~+CD28~-及CD8~+CD28~-T细胞的表达及意义

目的:分析桥本甲状腺炎(HT)外周血中CD4+CD28-及CD8+CD28-T细胞表达变化,探讨其在HT发病中的作用。方法:采用流式细胞仪测定50例初诊HT患者及30例正常对照者外周血CD4+及CD8+T细胞表面CD28分子的表达。结果:HT组与对照组比较,CD4+比例增高而CD8+比例降低,CD4+/CD8+比值增加;CD4+CD28+和CD8+CD28+在外周血表达下降,而CD4+CD28-和CD8+CD28-则表达增加;血清中IFN-γ及hs-CRP水平明显高于对照组;以上差别均有统计学意义(P<0.05)。且HT患者CD4+CD28-和CD8+CD28-表达比例分别与血清中IFN-γ和hs-CRP水平呈正相关(r=0.383,P=0.006;r=0.309,P=0.029)。结论:HT存在免疫调节功能异常,CD4+和CD8+T淋巴细胞表面的CD28的表达均明显减少,CD4+CD28-T细胞增加可能诱导了疾病的发生,CD8+CD28-T细胞增加可能参与HT的发病过程,导致患者出现慢性炎症反应。     

乐山市无症状HIV感染者与正常人CD3、CD4、CD45及CD3/CD45、CD4/CD45的对比分析

[目的]了解无症状HIV感染者与正常人的CD3、CD、CD45淋巴细胞绝对数及CD3/CD45、CD4/CD45情况. [方法]采用BD FACSCalibur流式细胞仪分别检测117例健康成人血液标本和87名无症状HIV感染者中的CD3、CD4、CD45淋巴细胞绝对数及CD3/CD45、CD4/CD45的比值,进行统计学分析. [结果]无症状HIV感染者男性与女性相比除CD3/CD45有统计学差异外(t=3.23,P＜0.05),其余几项指标均无统计学差异.但与正常人相比较比较CD3、CD4、CD3/CD45、CD4/CD45、CD45均存在统计学差异. [结论]当HIV感染者CD4细胞减少的还不是十分明显(未小于200个/μl),但发现感染者CD4/CD45的比值开始持续明显变小时,应开始考虑对感染者进行治疗.     

不同试剂在流式细胞仪上检测CD45~+、CD4~+细胞的效果评价

目的使用国产试剂检测外周血中的CD45+和CD4+细胞,并与进口试剂比对,进行效果分析及评价。方法收集北京地区200例不同免疫水平患者的全血标本,分别使用贝克曼库尔特生产的进口试剂和同生时代研发的国产试剂,对200例标本应用同一台流式细胞仪进行外周血细胞表面抗原CD45+和CD4+的平行检测,并分析两者检测结果的相关性和一致性。结果 2种试剂检测CD4+细胞、淋巴细胞、粒细胞结果的相关系数均较高,分别为0.995 0、0.997 0、0.997 0,并显示高度的一致性;3组细胞检测的预期偏倚可信区间小于规定的允许误差范围。结论国产试剂与进口试剂相比具有等效性,已达到进口试剂的检测效果。     

血清CD3~+、CD4~+、CD8~+T细胞诊断造血干细胞恶性克隆性疾病(白血病)的价值

目的:探讨外周血CD3~+、CD4~+、CD8~+T细胞在白血病中的诊断价值。方法:分析67例白血病患者的临床资料,同期选择30例正常人为对照组,采用流式细胞仪检测两组患者的CD3~+T细胞、CD4~+T细胞、CD8~+T细胞的表达率,同时将观察组患者分为急性白血病(A组)和慢性白血病(B组),比较两组CD3~+T细胞、CD4~+T细胞、CD8~+T细胞表达情况,分析白血病轻重与免疫功能的关系。结果:观察组血清CD3~+T细胞、CD4~+T细胞表达率依次为(61.72±15.43)%、(32.64±7.51)%,均显著低于对照组(68.95±16.24)%、(37.54±7.43)%,CD8~+T细胞表达率(33.45±6.36)%显著高于对照组(26.51±7.27)%(P0.05);A组患者的CD3~+T细胞、CD4~+T细胞表达水平为(57.59±10.43)%、(62.93±11.08)%,均显著低于B组(62.93±11.08)%、(33.42±5.19)%,CD8~+T细胞表达率(34.85±6.27)则高于B组(31.67±5.58)%(P0.05);且rsCD3~+T=0.623,rsCD4~+T=0.714,rsCD8~+T=-0.755,P均0.05。结论:白血病患者的外周血CD3~+、CD4~+、CD8~+T细胞表达紊乱,临床可借助上述T细胞表达水平进行疾病诊断及病情判断。     

Immunoinformatics prediction of overlapping CD8+ T-cell,IFN-γ and IL-4 inducer CD4+ T-cell and linear B-cell epitopes based vaccines against COVID-19 (SARS-CoV-2)

At the beginning of the year 2020, the world was struck with a global pandemic virus referred to as SARS-CoV-2 (COVID-19) which has left hundreds of thousands of people dead. To control this virus, vaccine design becomes imperative. In this study, potential epitopes-based vaccine candidates were explored. Six hundred (6 0 0) genomes of SARS-CoV-2 were retrieved from the viPR database to generate CD8⁺ T-cell, CD4+ T-cell and linear B-cell epitopes which were screened for antigenicity, immunogenicity and non-allergenicity. The results of this study provide 19 promising candidate CD8⁺ T-cell epitopes that strongly overlap with 8 promising B-cells epitopes. Another 19 CD4⁺ T-cell epitopes were also identified that can induce IFN-γ and IL-4 cytokines. The most conserved MHC-I and MHC-II for both CD8⁺ and CD4⁺ T-cell epitopes are HLA-A*02:06 and HLA-DRB1*01:01 respectively. These epitopes also bound to Toll-like receptor 3 (TLR3). The population coverage of the conserved Major Histocompatibility Complex Human Leukocyte Antigen (HLA) for both CD8⁺ T-cell and CD4⁺ T-cell ranged from 65.6% to 100%. The detailed analysis of the potential epitope-based vaccine and their mapping to the complete COVID-19 genome reveals that they are predominantly found in the location of the surface (S) and membrane (M) glycoproteins suggesting the potential involvement of these structural proteins in the immunogenic response and antigenicity of the virus. Since the majority of the potential epitopes are located on M protein, the design of multi-epitope vaccine with the structural protein is highly promising though the whole M protein could also serve as a viable epitope for the development of an attenuated vaccine. Our findings provide a baseline for the experimental design of a suitable vaccine against SARS-CoV-2.     

CD4~+ CD25~(high) CD127~(low)调节性T细胞在宫颈癌患者外周血中的表达及意义

目的:探讨CD4+ CD25high CD127low调节性T细胞(Regulatory Tcell,Treg)在宫颈癌患者外周血中的表达特点及临床意义。方法:采用流式细胞术检测21例宫颈癌患者和11例健康者外周血中CD4+ CD25high CD127low Treg、CD4+ T细胞、CD8+T细胞和NK细胞的表达水平。结果:21例宫颈癌患者外周血中CD4+ CD25high CD127low Treg占总CD4+ T细胞的(11.17±2.14)%,高于健康对照组(6.96±0.94)%(t=5.974,P<0.05),与NK细胞呈负相关(r=-0.468,P<0.05);CD4+T、CD8+T细胞占总T细胞的比例与健康对照组比较差异均无统计学意义;随疾病进展,宫颈癌患者外周血中CD4+ CD25high CD127low Treg水平升高,Ⅱ期+Ⅲ期患者外周血中CD4+ CD25high CD127low Treg占总CD4+ T细胞的(10.80±1.48)%,明显高于Ⅰ期患者(9.34±1.42)%(P<0.05)和健康对照组(6.96±0.94)%(P<0.05)。结论:宫颈癌患者外周血CD4+ CD25high CD127low Treg表达水平可能是一个较好的反映宫颈癌患者免疫功能状态的参考指标,其在外周血的升高程度与肿瘤临床分期有关,可能参与了宫颈癌的发生发展。     

Reciprocal changes in CD11c+CD11b+ and CD11c+CD8α+ dendritic cell subsets determine protective or permissive immune response in murine experimental VL

CD11c⁺CD8α⁺ and CD11c⁺CD11b⁺ dendritic cells are two major subsets of murine splenic CD11c⁺ DCs which play a crucial role in T cell priming and shaping Th1/Th2 responses, but their role in the context of experimental visceral leishmaniasis (VL) is poorly understood. Herein, we showed that L. donovani infection in Balb/c mice preferentially decreased the population abundance of CD11c⁺CD11b⁺ DCs and increased relative abundance of splenic CD11c⁺CD8α ⁺DCs. During infection, splenic CD11c⁺CD11b⁺ DCs induced Th1 differentiation whereas CD11c⁺CD8α⁺ DCs promoted Th2 differentiation. Additionally, treatment of infected mice with miltefosine as experimental control exhibited host defense allowing the restoration of CD11c⁺CD11b⁺ population and decrease in CD11c⁺CD8α⁺ subset. Furthermore, reciprocal regulation of immune accessory surface molecules, Sema4A and OX40L critically determined Th1/Th2 response induced by these DC subsets during VL. L. donovani infection significantly induced OX40L expression and slightly downregulated SEMA 4A expression in CD11c⁺CD8α⁺ DCs whereas miltefosine treatment significantly downregulated OX40L expression along with pronounced upregulation of SEMA 4A expression in CD11c⁺CD11b⁺ DCs. SiRNA mediated knockdown of SEMA 4A markedly reduced CD11c⁺CD11b⁺ driven IFN-γ, TNF-α and IL-12 synthesis in miltefosine treated mice whereas functional blocking of OX40L decreased CD11c⁺CD8α⁺ induced IL-10, IL-4 and TGF-β synthesis in L. donovani infected group. Vaccination of Balb/c mice with antigen-pulsed + CpG-ODN-activated DC subsets revealed that only antigen-pulsed CD11c⁺CD11b⁺ DCs eliminated parasite load in visceral organ and restored protective Th1 cytokine response. Collectively, our results suggest that differential regulation of splenic CD11c⁺ subsets by L. donovani is essential for disease progression and specific subtypes may be exploited as prophylactic measures against visceral leishmaniasis.     

CD4+CD25+T细胞研究新进展

CD4 CD25 T细胞是新近才被认识的一类免疫调节细胞,在胸腺中产生,主要发挥抑制性免疫调节功能,表达IL-10 mRNA,细胞表面表达IL-2受体a链(CD25),在维持机体内环境的稳定、抗感染免疫、抗肿瘤免疫、诱导移植耐受及自身免疫性疾病等方面发挥重要作用。     

肺炎链球菌疫苗抗原促进CRTH2(CD4~+CD294~+Th2)细胞增殖的实验研究

目的研究肺炎链球菌疫苗通过树突状细胞抗原递呈作用对CRTH2(CD4~+CD294~+Th2)细胞促增殖作用,为扩增及分选Th2细胞提供新方法。方法外周血单核细胞培养为树突状细胞,负载肺炎链球菌疫苗抗原后与T淋巴细胞共培养,CCK8法测定混合淋巴细胞反应,流式细胞仪分析DC及CRTH2细胞。结果肺炎链球菌疫苗可促进树突状细胞成熟,与TNF-a共同是DC成熟佐剂。DC负载肺炎链球菌疫苗抗原能使第5天CRTH2细胞亚群比率[(0.93±0.10)%]较首日[(0.70±0.02)%]升高,其绝对数也升高(均P0.05)。结论树突状细胞负载肺炎链球菌疫苗抗原能够促进CRTH2细胞增殖,可能是扩增Th2细胞有效方法之一。     

急性脑梗死患者外周血CD4+ CD25+调节性T细胞(Treg)水平与颈动脉粥样硬化的相关性

目的:探讨急性脑梗死患者外周血CD4+CD25+调节性T细胞(Treg)水平与颈动脉粥样硬化相关性。方法:收集住院的发病7天内的急性脑梗死患者(即梗死组)48例,同期住院健康体检者(即对照组)30例。其中,梗死组患者根据病变程度分为三组:颈动脉内膜增厚组、颈动脉斑块组、颈动脉狭窄组。采用流式细胞仪法测定全部人群Treg水平。结果:(1)颈动脉狭窄组Treg百分比低于颈动脉斑块组,颈动脉斑块组Treg百分比低于颈动脉内膜增厚组,差异均有统计学意义(p0.05)。且Treg百分比与颈动脉内-中膜厚度呈显著负相关(p0.01)。(2)hs-CPR水平随颈动脉粥样硬化程度的加重而升高,颈动脉狭窄组hs-CPR水平高于颈动脉斑块组,颈动脉斑块组hs-CPR水平高于颈动脉内膜增厚组,差异均有统计学意义(p0.05)。且外周血Treg与hs-CPR呈显著负相关(P0.05)。结论:Treg可作为急性脑梗死患者免疫稳态失衡和炎症反映的标志物之一,判断急性脑梗死患者颈动脉粥样硬化严重程度的一个客观指标。     

CD4+CD25+T细胞与复发性流产

CD4+CD25+T细胞是一类具有免疫调节功能的细胞.正常情况下在体内发挥免疫抑制作用.该类细胞分泌白细胞介素10(IL-10)、转化生长因子β(TGF-β),表达CD25(IL-2Rα)、叉头蛋白(FOXP3蛋白)及细胞毒性T淋巴细胞抗原4(CTLA-4)分子等,通过细胞间直接接触或细胞因子间接方式广泛参与自身免疫耐受、肿瘤免疫、移植免疫.妊娠类似同种异体移植,妊娠时脱落人母体循环的胎儿抗原刺激CD4+CD25+T细胞的产生并在母胎界面形成免疫耐受微环境,防止胎儿受到母体排斥.CD4+CD25+T细胞数量或功能失调则会导致各种疾病的发生,如自身免疫病,移植物抗宿主病,流产等.在复发性流产患者体内CD4+CD25+T细胞数目及功能明显下降.实验表明增强CD4+CD25+T细胞数量或功能可以阻止移植物抗宿主病和治疗复发性流产.     

淋巴瘤患者外周血T细胞CD88+CD28-、CD4+CD25+的表达及意义

目的 探讨恶性淋巴瘤患者外周血T细胞CD88+CD28-、CD4+CD25+的表达及意义.方法 采用流式细胞术检测35例恶性淋巴瘤患者外周血T细胞CD88+CD28-、CD88+CD28-、及CD4+CD25+.结果 恶性淋巴瘤患者外周血T细胞CD88+CD28-、CD88+CD28-、CD4+CD25+与正常对照差异有统计学意义(P<0.01);治疗有效后三者趋于正常(P>0.05);而无效组与正常时照组相比差异仍有统计学意义(P<0.01).结论 恶性淋巴瘤患者外周血T细胞CD88+CD28-、CD88+CD28-、及、CD4+CD25+表达异常,不同治疗效果表达不同,恶性淋巴瘤患者有免疫功能异常,治疗有效后免疫功能恢复正常.     

CD4+、CD8+及CD4+/CD8+对胃癌患者病情发生发展影响研究

目的探讨CD4+、CD8+及CD4+/CD8+对胃癌患者病情发生发展的影响。方法选取2017年6月～2018年10月于遂宁市中心医院接受治疗的胃癌患者213例为胃癌组,检测治疗前后患者血液中CD4+、CD8+及CD4+/CD8+的变化情况,并观察术后感染情况;同时选取健康志愿者98例作为健康对照组。结果治疗前,胃癌组CD4+、CD8+、CD4+/CD8+水平显著低于健康对照组(P 0.05),治疗后,CD4+、CD8+、CD4+/CD8+表达水平明显上升,差异有统计学意义(P 0.05)。胃癌组治疗后出现感染患者CD4+、CD8+及CD4+/CD8+水平明显低于未感染者,差异有统计学意义(P 0.05)。结论 CD4+、CD8+及CD4+/CD8+表达水平在胃癌病情的发生发展中起重要作用,监测其水平变化对胃癌患者的病情演变及预后具有十分重要的指导意义。     

上皮性卵巢癌患者外周血CD4~+CD25~(high)调节性T细胞分析

目的探讨CD4+CD25highT细胞(Treg)在60例上皮性卵巢癌患者外周血中的分布及其表型特征,分析手术对卵巢癌患者外周血Treg的影响。方法采用流式细胞术检测卵巢癌患者及健康人外周血中Treg的比例,探讨其表型特征并分析手术对患者外周血Treg比例的影响。结果与正常对照(2.95±1.09)%相比,60例上皮性卵巢癌患者外周血中Treg比例明显增加(9.81±5.19)%,二者差异有统计学意义(P0.01);手术后,患者外周血中Treg的比例相比术前显著下降(P0.01);Treg表型分析发现:Treg高表达CD45RO、HLA-Ⅰ、Foxp3分子,较高水平表达OX40、GITR、CD152、CD95、CD95L、B7-H1,几乎不表达CD80、CD86、B7-H4、CD45RA、CD69分子,而HLA-DR、CD154的表达水平在个体间差异较大,同时大部分Treg细胞CD127表达阴性。结论上皮性卵巢癌患者外周血CD4+CD25highT细胞水平明显升高,可能参与卵巢癌患者肿瘤免疫抑制。     

淋巴细胞CD3+、CD4+和CD19+作为难治性支原体肺炎预测指标研究

目的分析普通肺炎支原体肺炎(MPP)与难治性支原体肺炎(RMPP)的临床特点、淋巴细胞亚群、血清水平,探索RMPP的预测指标。方法对100例MPP患儿的临床资料进行回顾性分析,其中普通MPP患儿65例、RMPP患儿35例,比较两组的临床特点、淋巴细胞亚群、血清水平等各项身体指标,采用ROC曲线对RMMP患者的特异性指标进行有效评估。结果淋巴细胞亚群CD3+、CD4+、CD19+、CD56+按实际检测结果计数以及血清乳酸脱氢酶(LDH)、C反应蛋白(CRP)、免疫球蛋白E(IgE)水平两组比较差异显著(P<0.05)。ROC曲线分析结果显示,T淋巴细胞(CD3+、CD4+)、B淋巴细胞(CD19+)按实际检测结果计数诊断普通MMP和RMPP的曲线下面积分别为0.867、0.912、0.849,其敏感性分别为89%、91%、89%,特异性分别为76%、72%、5%。结论 CD3+、CD4+、CD19+按实际检测结果计数可作为儿童RMPP的预测指标。     

乳腺癌患者外周血ALDH1~(high)CD44~+CD24~(-/low)细胞含量变化及其临床意义

目的:检测乳腺癌患者外周血ALDH1highCD44+CD24-/low细胞含量的变化,探讨其与乳腺癌发生的关系及临床意义。方法:观察对象为46例Ⅰ期、Ⅱ期、Ⅲ期和Ⅳ期乳腺癌患者和12名健康女性志愿者(对照组)。采用流式细胞仪检测、分析各组外周血中ALDH1high细胞和ALDH1highCD44+CD24-/low细胞含量及其变化情况。结果:①所有样本均能检出ALDH1high细胞,各组间均数比较差异无统计学意义(P>0.05);②Ⅳ期乳腺癌组的外周血ALDH1highCD44+CD24-/low细胞含量与其他各组比较差异均有统计学意义(P<0.05),而其他各组间比较差异无统计学意义(P>0.05);③Ⅳ期乳腺癌患者原发癌灶免疫组化结果各不相同,但均可在外周血中检出ALDH1highCD44+CD24-/low细胞。结论:①各组中的ALDH1high细胞含量无显著差异,说明ALDH1具有普遍干细胞性质;②ALDH1highCD44+CD24-/low细胞含量与乳腺癌的发生有明显相关性。③ALDH1highCD44+CD24-/low细胞与乳腺癌的免疫分型无相关性。