Differential effects of experimental hyperlipidemia on various types of rabbit peripheral blood lymphocyte receptors

Rabbits fed a high-cholesterol diet for 3 months showed an increase in peripheral blood lymphocytes with membrane receptors for the Fc portion of immunoglobulin G and a decrease in lymphocytes with receptors for the Fc portion of immunoglobulin M and also with receptors for the third component of the complement. Thus our results indicate changes in lymphocyte membrane receptor expression in experimental hyperlipidemia that may supposedly influence some lymphocyte functions.     

蚕蚀性角膜溃疡患者外周血淋巴细胞免疫表型和T细胞活化的研究

目的：观察蚕蚀性角膜溃疡患者外周血淋巴细胞免疫表到和T细胞活化的变化,进一步探讨本病患者的免疫功能。方法：用流式细胞术检测8例活动性蚕蚀性角膜溃病患者外周血淋巴细胞对项免疫表型变化,用植物凝集素和沸被醉酯作为刺激剂,以HLA－DR,CD69、CD71、CD25的表达为T细胞活化的指标,用流式细胞术分析。结果：蚕蚀性角膜溃疡患者外周血CD4、CD5、CD8、CD10、CD11b、CD15、CD16、CD19、CD23、CD25、CD41、CD69、HLA-DP、HLADR抗原表达阳性淋巴细胞以及HLA－DR、CD69、CD71、CD25在CD3和CD8细胞的表达均明显高于正常对照组。结论：蚕蚀性角膜溃疡患者具有增强的细胞免疫和体液免疫,外周血T细胞及其亚群出现异常活化,反映患者体内存在自身免疫反应而支持该病发病之自身免疫学说。     

人晶状体上皮细胞蛋白质组的双向电泳和质谱鉴定

目的： 建立人晶状体上皮细胞蛋白质组研究体系，探讨双向电泳和质谱鉴定技术在人晶状体上皮细胞蛋白质组研究中的作用。 方法: 体外培养人晶状体上皮细胞株，用两种不同方法提取总蛋白，进行固相pH梯度(IPG)等电聚焦双向凝胶电泳，凝胶通过GS-800扫描仪（Bio-Rad）获取图像并使用PDQuest专业图像分析软件分析。在此基础之上，胰酶消化蛋白质斑点并进行质谱分析。 结果: 获得了重复性较好的人晶状体上皮细胞蛋白质组电泳图谱。晶状体蛋白质斑点在等电点pH值为4-7、相对分子质量为17-72 kD之间均有分布。其中高丰度蛋白点主要分布于分子量19-50 kD、PI 5-7范围内。2个蛋白点通过质谱分析和数据库的检索得到了初步的鉴定。 结论: 建立起了一个稳定的分析人晶状体上皮细胞蛋白质组学实验体系；为进一步研究人类晶状体在生理状态及白内障等病理条件下的改变提供了蛋白质组学的研究方法和途径。     

应用四色荧光标记流式细胞术检测外周血淋巴细胞亚群的变化

目的 探讨四色荧光标记流式细胞术(Flow cytometry,FCM)检测鼻咽癌患者服用云芝丹参胶囊后外周血淋巴细胞亚群:辅助性T淋巴细胞(CD4 ),抑制性和细胞毒T淋巴细胞(CD8 ),B淋巴细胞(CD19 ),NK(CD16 CD56 ) 细胞的绝对数和百分率等的变化.方法 收集鼻咽癌患者27例,设立中药组和安慰剂对照组,采用四色荧光标记流式细胞术对服用云芝丹参胶囊后的鼻咽癌患者外周抗凝全血的淋巴细胞亚群CD4 细胞、CD8 细胞、B细胞、NK细胞进行绝对计数和相对计数,并对两组结果进行比较分析.结果 四色荧光标记流式细胞术结果显示:接受放射治疗的鼻咽癌患者在服用云芝丹参胶囊16周后,外周血T淋巴细胞的绝对数和百分率,以及Ts、Th细胞绝对数的下降均明显低于安慰剂组(P＜0.05);中药组和安慰剂组NK细胞百分率的变化均显著增高(P＜0.05); 但两组NK细胞绝对值的变化不存在明显差异(P＞0.05).结论 云芝丹参能明显减轻放射治疗对鼻咽癌患者的淋巴毒性.     

人外周血T淋巴细胞表型改变与衰老相关性研究

目的：探讨人T淋巴细胞表型随年龄变化的规律，寻找敏感的免疫衰老生物标志。方法：取年轻组(20—35岁)和年老组(50—75岁)志愿者的新鲜肝素抗凝静脉血，进行三色或四色直接免疫荧光染色，获取有核细胞后以流式细胞仪分析T细胞亚群的表型。结果：2个年龄组的总T细胞(CD3^ )、辅助T细胞(CD4^ )以及细胞毒T细胞(CD8^ )亚群的相对百分率没有明显差别，但年老组T细胞上CD3分子的密度(MFI)明显下降；粘附分子CD44与CD62L在3群T细胞上阳性率的差别均无统计意义；而2组间总T细胞、辅助T细胞以及细胞毒T细胞亚群的CD95阳性率都有显著差别，表现为随年龄增加，CD95表达率上升。结论：在所研究的年龄组间，T细胞及其亚群的相对数量没有显著改变，而CD3表达密度随年龄增加而下调；T细胞的凋亡诱导分子CD95阳性率随年龄增加而上升，提示CD95可能是评价免疫衰老的潜在生物标志。     

淋巴细胞免疫表型检测及其统计学分析

目的：以标准化质控及正确的统计学分析方法确定淋巴细胞免疫表型参考值。方法：用Simultest^TM IMK-Lympho-cyte Kit荧光抗体对93例健康中国成人血液进行双标染色,以FACS Calibur流式细胞仪进行分析,SimulSET获取数据并分析结果。符合质控标准的数据汇总进行统计学分析,结果：CD3^ 、CD3^ CD4^ 、CD3^ CD8^ 细胞呈正态分布,CD3^－CD19^ 、CD3^－CD16^ 和/或CD56^ 细胞及CD3^ CD4^ ／CD3^ CD8^ 比值呈偏态分布。CD3^ 、CD3^ CD4^ 、CD3^ CD8^ 细胞以正态分布法确定95％可信区间参考值,分别为：49．28％－80．52％、25．29％－48．11％、11．93％－44．77％;CD3^－CD19^ 、CD3^－CD16^ 和／或CD56^ 细胞及CD3^ CD4^ ／CD3^ CD8^ 比值以百分位数法确定95％可信区间参数值,分别为：4．74％－19．84％、10．63％－42．86％,0．65－3．05。结论：建立正常参考值应综合考虑使用正态分布法与百分位数法。建议以标准化质控及正确的统计学分析方法确定参考值,使得同种族,不同地区的实验室应用相同试剂、相同仪器所获取的参考值具有良好的一致性。     

The effects of altered exercise distribution on lymphocyte subpopulations

The effects of exercise distribution on lymphocyte count, lymphocyte subpopulations and plasma cortisol concentration in peripheral blood were assessed in 19 healthy subjects. The subjects were randomly divided into group A (n = 10) or group B (n = 9) according to exercise distribution. Both groups underwent a 10-week programme involving 5 × 2-week blocks: baseline (B), training period 1 (TP1), stabilisation 1 (S1), training period 2 (TP2), and stabilisation 2 (S2). During B, S1 and S2 normal training was undertaken. During TP1 and TP2 the subjects increased the amount of training by 50% in week 1 and by 100% in week 2. During TP1 subjects in group A exercised 6 days·week^–1, while during TP2 these subjects exercised on 3 alternate days·week^–1, but doubled the duration of each training session. The subjects in group B reversed this training order. Blood was collected 36–42 h following exercise period B, and at the end of periods TP1, S1, TP2 and S2, and also 12–18 h following completion of exercise at the end of TP1 and TP2. There were no significant differences (P > 0.05) between the 6 day·week^–1 programme and the 3 alternate day·week^–1 programme in total lymphocyte count, CD3⁺, CD4⁺, CD8+, CD16⁺, or CD19⁺ cells, the CD4:CD8 ratio, HLA-DR⁺ (activated) T cells or plasma cortisol concentrations. Following both TP1 and TP2 there was a nonsignificant decrease in lymphocyte subpopulations. However following both S1 and S2 (baseline training) there was a significant increase in total lymphocyte count, CD3⁺, CD4⁺ and CD8⁺ lymphocytes. The S2 variables statistically significant from B were: total lymphocyte count (P < 0.01), CD3⁺ T-cells and percentage of circulating lymphocytes (^P < 0.01), CD4⁺ cells (P < 0.0001), CD8⁺ cells (P < 0.05), and HLA-DR⁺ (activated) T-cells (P < 0.05). The results indicated that provided the amount of exercise is constant for a given period, then exercise distribution is not a critical variable in the alteration of lymphocyte subpopulations that may occur in response to overload training. However 2 weeks of overload training followed by 2 weeks of active recovery (baseline) training may induce an increase in the lymphocyte count.     

人外周血T淋巴细胞自噬现象的观察

目的：观察分离培养的人外周血T淋巴细胞的自噬现象。方法：密度梯度离心法及尼龙棉柱法分离健康成年人外周血T淋巴细胞，分空白组及地塞米松（DXM）组，培养72小时后观察细胞光镜及电镜形态学、MDC荧光染色，并用流式细胞仪检测自噬细胞比例变化。结果：①通过自然培养后人外周血T淋巴细胞可出现典型自噬细胞形态学改变。②空白组及DXM组72小时自噬细胞发生率与0小时比较有显著性差异。③DXM组与空白组72小时自噬细胞发生率有显著性差异。结论：人外周血T淋巴细胞存在自噬现象，DXM可诱导人外周血T淋巴细胞自噬。     

The human peripheral lymphocyte—a model system for studying the combined effect of psoralen plus black light

Summary The effect of psoralen plus long wavelength ultraviolet light (UVA) on³H-thymidine uptake of PHA stimulated human lymphocytes was investigated. PHA induced lymphocyte transformation was inhibited by the combined action of psoralen and UVA irradiation in a dose related manner. Inhibition of DNA-synthesis occurred at concentrations of psoralen that can be expected in the serum of patients treated by systemic photochemotherapy. No effect was noted at these psoralen concentrations in the absence of UVA irradiation. Also did UVA irradiation in the absence of psoralen not inhibit³H-thymidine incorporation into PHA stimulated lymphocytes.     

海拔4500m地区藏、汉人群外周血淋巴细胞亚群检测

目的探讨高原缺氧对机体免疫功能及其免疫调节功能的影响。方法采用流式细胞术对高海拔地区(4 500 m)52名健康汉族人群和35名健康藏族人群进行了淋巴细胞亚群CD4+、CD8+、CD3-CD19+(B细胞)、CD3-CD56+(NK细胞)测定,并与中度海拔(西宁)地区45名健康汉族人群进行了比较。结果 2个海拔的CD4+、CD8+、CD3-CD19+、CD3-CD56+各项中,4 500 m人群CD8+高于西宁组,CD4+明显低于西宁组,P<0.05;CD19+(B细胞)西宁组高于高海拔组,P<0.05;海拔4 500 m汉族、世居藏族人群的CD4+、CD8+无统计学意义比较,P>0.05;CD3-CD56+(NK)藏族低于汉族,P<0.05;CD3-CD19+(B细胞)藏族高于汉族,P<0.05。结论高原低氧环境影响机体的免疫调节功能。