人精浆对不同丝裂原诱导淋转反应的影响

本文通过人精浆对PHA、ConA和PWM三种丝裂原诱导淋巴细胞转化反应的影响,间接了解HSP对T辅助、T抑制和B淋巴细胞功能的影响,结果发现不同浓度的精浆对三种丝裂原诱导的淋转反应均有明显抑制作用(P<0.05),且三种浓度HSP的抑制作用在无显著性差异(P>0.05);中浓度的精浆对PHA、ConA和PWM诱导转反应的抑制率分别为69.7、51.7和48.3％,说明精浆对机体的T辅助、T抑制性和B淋巴细胞功能均有明显的抑制作用。此外,还对精浆的免疫抑制作用机理和意义进行了讨论。     

轻度认知障碍及阿尔茨海默病患者外周血淋巴细胞中蛋白磷酸酯酶-2A的改变

目的 探讨轻度认知功能障碍(MCI)及阿尔茨海默病(AD)患者外周血淋巴细胞蛋白磷酸酯酶-2A(PP-2A)的变化.方法 用放射性配体结合试验检测11名健康对照者、11例MCI患者及11例AD患者外周血淋巴细胞PP-2A的活性,并用Western bolt检测PP-2A蛋白的表达.结果 MCI组外周血淋巴细胞PP-2A活性(0.71±0.12)及蛋白表达(0.80±0.05)与健康对照组[分别为(1.01±0.09)和(0.96±0.07)]相比明显降低(均P＜0.01);AD组PP-2A活性(0.64±0.11)及蛋白表达(0.76±0.06)亦明显降低,与对照组相比差异有统计学意义(均P＜0.01);AD组PP-2A活性及蛋白表达比MCI组有降低的趋势,但差异无统计学意义.结论 MCI及AD患者外周血淋巴细胞PP-2A的活性及表达降低,在MCI的诊断中可能有参考价值,同时亦可能对AD的诊断有一定的潜在的意义.     

Flow Cytometric Analysis of Lymphocyte Subsets of Mice Maintained on an Ethanol-Containing Liquid Diet

Alcoholic patients often have impaired immune function, yet little is known about the precise mechanism(s) of this impairment. We have previously shown that ethanol consumption by mice alters copolymer-specific humoral and cellular immune responses. In this study, we asked whether alcohol consumption by mice would phenotypically alter lymphocyte populations. Female C57BL/6 mice were fed a nutritionally complete liquid diet containing 35% ethanol-derived calories for up to 8 days. As controls, mice either were fed a liquid control diet that isocalorically substitutes sucrose for ethanol or remained on a standard solid diet and water ad libitum. Although mice fed ethanol-containing liquid or pair-fed control liquid diets have decreased numbers of spleen cells compared with solid diet controls, only the ethanol-containing diet allowed normally nonresponder C57BL/6 spleen cells to make antibody responses to the poly(Glu⁵⁰Tyr⁵⁰) synthetic copolymer antigen. Flow cytometric analysis of splenic lymphocyte populations of mice on the ethanol-containing diet shows an increase in the relative proportion of T-lymphocytes as compared with mice on either solid or liquid control diets. No such change is seen for either B-cell or natural killer cell populations in these same mice. Both liquid control and liquid ethanol diets caused a slight decrease in the CD4:CD8 ratios of splenic T-lymphocytes. We see the relative percentage of T-cells bearing the αβ-cell receptor (TcR) increases in the spleens of liquid ethanol diet mice; a smaller increase TcRαβ usage is seen in the spleens of liquid control mice, compared with solid diet mice. Flow cytometric analysis shows that little, if any, difference exists in TcRγδ expression between the liquid ethanol and either the liquid control or solid diet groups. Preliminary analysis of TcRαβ subsets suggest that ethanol increases the percentage of T-cells expressing Vβ5 and Vβ8, and decreases the percentage of Vβ11 expressing cells. These findings suggest that, in addition to modifying the immune response, ethanol alters the phenotypic expression of lymphocyte subsets.     

腹腔注射细菌脂多糖加重大鼠的应激性抑郁症

目的 观察腹腔注射细菌脂多糖对大鼠应激性抑郁症的影响。方法 制备大鼠应激性抑郁症模型，采用开场实验检测大鼠的行为性抑郁，用MTT法测定淋巴细胞转化。结果 慢性应激16d，大鼠出现自主活动时间和中区逗留时间缩短、活动路程减少等抑郁性行为。腹腔注射细菌脂多糖加重大鼠的行为性抑郁，并加强应激大鼠血清对正常淋巴细胞转化的抑制作用。结论 腹腔注射细菌脂多糖加重大鼠的行为性抑郁，其原因可能与脂多糖引起的脑内炎性细胞因子的释放有关。     

致敏供者淋巴细胞输注对受者免疫功能重建及移植物抗宿主病发生率的影响

目的探讨非清髓异基因外周血造血干细胞移植后致敏供者淋巴细胞输注(DLI)对受者免疫重建及移植物抗宿主病(GVHD)发生率的影响。方法以C57BL/6小鼠(H-2b)为受鼠, BALB/c小鼠(H-2d)为供鼠,建立异基因外周血造血干细胞移植模型(实验组),移植当天受者接受60Coγ射线全身照射,移植后第2天腹腔注射环磷酰胺200 mg/kg。以不行造血干细胞移植,仅行γ射线全身照射和环磷酰胺腹腔注射的正常C57BL/6小鼠为对照。实验组存活小鼠在移植后第28天分别接受致敏供鼠淋巴细胞输注(n=8)、未致敏供鼠淋巴细胞输注(n=8),另有6只不输注供鼠淋巴细胞。移植后检测受者异基因嵌合率,观察GVHD的发生情况以及T淋巴细胞亚群变化,并行供受者间以及供受者与第三方小鼠(昆明鼠)间的单向混合淋巴细胞反应。结果实验组受鼠SRY基因均为阳性,嵌合率为(30.881±3.962)%。DLI后,接受未致敏DLI者均出现不同程度的GVHD,死亡3只(7.5%,3/8),而接受致敏DLI者无明显GVHD及死亡者。移植后45 d,接受致敏DLI者的CD8 T淋巴细胞明显高于正常C57BL/6小鼠(P<0.05),而接受未致敏DLI者的CD8 T淋巴细胞与正常对照的差异无统计学意义(P>0.05),至移植后60 d,接受DLI者的T淋巴细胞亚群接近正常(P>0.05);对照组T淋巴细胞亚群持续低于正常对照(P<0.05)。实验组小鼠淋巴细胞对供者淋巴细胞刺激的反应性均下降(P<0.01),以接受致敏DLI者最明显,而对昆明鼠淋巴细胞刺激的反应性维持正常水平。结论造血干细胞移植后输注致敏供者的淋巴细胞能促进受者的免疫功能重建,并可减少GVHD的发生。     

β-Adrenergic agonists suppress chronic/relapsing experimental allergic encephalomyelitis (CREAE) in Lewis rats

Chronic/relapsing experimental allergic encephalomyelitis (CREAE) serves as an animal model for relapsing/remitting multiple sclerosis. Treatment with the β-adrenergic agonist isoproterenol or the β₂-adrenergic agonist terbutaline significantly suppressed both the first acute attack and the number of relapses in CREAE Lewis rats. The number of relapses was decreased even when treatment with β-adrenergic agonist was started after the onset of the first acute attack of CREAE. β-adrenergic receptor number was increased significantly on splenocytes from CREAE rats as compared to healthy controls or CFA-injected rats. Terbutaline treatment of CREAE rats lowered the splenocyte receptor number to normal values.     

荧光探针标记单克隆抗体在不同条件下的荧光变化

应用流式细胞术，探讨了不同贮存条件和时间对ＦＩＴＣ和ＰＥ标记单抗的荧光变化。结果表明４℃－３０℃１冷冻干燥对ＦＩＴＣ标主单抗无明显影响，ＰＥ偶联物皮４℃为宜。两种标记物检测的正常粉外周血Ｔ细胞及其亚群结果一致。     

进展期胃癌患者手术前后外周血T细胞及其亚群变化的研究

目的:研究进展期胃癌患者外周血T细胞免疫功能状态,手术对T细胞免疫功能的影响,以及对术后免疫治疗的指导。方法:采用间接免疫荧光染色流式细胞仪检测法,对43例进展期胃癌患者作手术前后外周血T细胞及亚群的测定,17例健康人作术前正常对照组。结果:与对照组相比,术前患者CD_3~+、CD_4~+细胞及CD_4~+/CD_8~+比值显著减少(P<0.01),而CD_8~+细胞无差异(P>0.05)。9例行非根治术者,手术前后T细胞及亚群无明显变化;而34例行根治术者,术后除CD_8~+细胞无变化外,CD_3~+、CD_4~+细胞及CD_4~+/CD_8~+比值均较术前有显著提高(P<0.01或P<0.05)。结论:术前进展期胃癌患者外周血T细胞免疫功能低下,行根治性切除术后得以改善。术后辅助免疫治疗或免疫化疗,以期提高生存率。     

调节性B淋巴细胞在视神经脊髓炎谱系疾病患者外周血中的表达和意义

背景 调节性B淋巴细胞(Breg)是一类具有负向免疫调节作用的细胞,在多种自身免疫性疾病中表达异常,视神经脊髓炎谱系疾病(NMOSD)系自身免疫性疾病,目前关于Breg在NMOSD患者外周血中的表达和意义的研究较少。目的 研究Breg在NMOSD患者外周血中的表达和意义。方法 选取2019年6月—2021年12月新疆医科大学第一附属医院神经内科收治的NMOSD患者55例作为NMOSD组,选取同期本院体检正常的健康志愿者50例作为对照组。运用流式细胞仪检测两组研究对象外周血中CD19⁺CD24^hiCD38^hi Breg、CD19⁺CD24^hiCD27⁺Breg的表达。采用酶联免疫吸附测定(ELISA)法检测和比较两组研究对象血清中白介素10(IL-10)、白介素35(IL-35)和转化生长因子β1(TGF-β1)的水平。结果 NMOSD组患者CD19⁺CD24^hiCD38^hi Breg、CD1...