Changes of percentages in immune cells phenotypes and cytokines production during two-year IFN-β-1a treatment in multiple sclerosis patients

Abstract. Objective: The aim of the study was to find out whether INF--1a influences the immune profile of peripheral blood (PB) leukocytes in MS patients. Method: We have studied 20 patients with relapsing-remitting form of MS treated with INF--1a using twocolor cytometry. We determined immune cells phenotypes and production of some cytokines: IL-4, IL-10, IL-12, IFN-, before drug administration and after starting the treatment. Results: In MS patients an increased percentage of CD14⁺CD86⁺ cells and CD3⁺CD25⁺ cells was noticed after 6, 9 and 12 months of INF--1a therapy. Among cytokine-producing cells we noted an increased fraction of CD3⁺IL-4, CD14⁺IL-10 and CD14⁺IL-12 cells after 12 months, which decreased to the level observed before treatment after 24-month therapy. Conclusions: IFN--1a treatment was associated with significant changes in immune response. This effect was mostly evident within the first year of treatment.     

平消胶囊对胆管癌细胞生长及CD44v6蛋白表达的影响

目的通过观察平消胶囊(郁金、马钱子粉、仙鹤草、五灵脂、白矾、硝石、干漆、枳壳)血清作用于人肝外胆管癌细胞QBC939后,对癌细胞的生长和转移的影响,探讨其抗癌及转移机制。方法将平消胶囊灌喂大鼠,制备含药血清,血清培养胆管癌细胞,MTT法检测不同剂量含药血清对人胆管癌细胞QBC939的生长抑制作用,流式细胞仪检测细胞周期、细胞膜上黏附分子CD44v6表达的变化。结果平消胶囊血清能明显抑制人肝外胆管癌细胞QBC939的增殖,具有时间、剂量依赖关系。药物作用后,QBC939细胞生长受阻于G0/G1期,并且黏附分子CD44v6在细胞膜上表达下调,剂量越大,CD44v6下调越明显。结论平消胶囊能有效地抑制QBC939细胞增殖,通过影响细胞生长、诱导细胞膜上黏附分子CD44v6表达下调,导致细胞凋亡,防止癌细胞转移。     

Deficient IFN-γ Expression in Umbilical Cord Blood (UCB) T Cells Can Be Rescued by IFN-γ-Mediated Increase in NFATc2 Expression

Regulation of nuclear factor of activated T cells-c2 (NFATc2) gene expression is not clearly defined. We previously reported reduced NFATc2 protein expression in cord blood T lymphocytes. Here we show that NFATc2 expression in T cells is dependent in part on the presence of IFN-gamma during primary stimulation, as blocking of IFN-gamma blunted NFATc2 protein and mRNA upregulation. Conversely, addition of exogenous IFN-gamma during stimulation resulted in increased expression of NFATc2 in cord blood T lymphocytes. This correlated with rescue of deficient IFN-gamma expression by cord blood T cells. Rescue of IFN-gamma expression in cord blood T cells was dependent on the presence of antigen-presenting cells, as addition of IFN-gamma during stimulation of purified cord blood T cells did not result in an increase of IFN-gamma expression, and depletion of monocytes ablated the rescue of IFN-gamma expression. Our results point to impaired function in the antigen-presenting cell population of cord blood, playing a role in the hyporesponsiveness of T cells.     

鼠源轮状病毒vp7基因的表达载体构建及转基因植物的研究

目的：构建表达鼠源轮状病毒抗原基因vp7的植物表达载体及植物转化研究。方法：抗原基因vp7经PCR扩增后直接克隆到PUC－T载体，双酶切目的片断和植物表达载体，以T4连接酶将目的片断与载体相连接，电转化方式将重组质粒转入农杆菌。结果：以重组农杆菌为介导将靶基因转入到马铃薯外植体。成功地将目的基因定向克隆到表达载体，并转入到农杆菌中；以农杆菌为介导获得抗性转基因马铃薯植株。结论：通过PCR检测，初步确定轮状病毒外壳蛋白基因vp7已成功地整合到马铃薯植株中。     

CD44v6和E-cadherin表达与结直肠癌浸润转移关系

目的　探讨CD44v6和E cadherin(E cad)蛋白表达与结直肠癌浸润转移的相关性。方法　应用免疫组织化学技术 ,检测 90例结直肠癌组织中CD44v6和E cad蛋白表达。结果　 90例结直肠癌中CD44v6和E cad蛋白阳性表达率分别为75 6 %和 46 7%。CD44v6高表达及E cad低表达与结直肠癌Dukes分期、浆膜浸润、淋巴结转移、肝脏转移均呈正相关 (P <0 0 5 )。结直肠癌中CD44v6表达与E cad表达呈负相关 (r =- 0 4 3,P <0 0 0 5 )。结论　CD44v6和E cad表达与结直肠癌浸润转移密切相关。检测CD44v6和E cad蛋白表达可作为判断结直肠癌预后的客观指标。     

胃良恶性病变组织中CD24和CD44v6的表达及其意义

目的： 研究胃良恶性病变组织中癌干细胞标记物CD24、CD44v6的表达并探讨其临床病理意义。方法: 49例胃癌、20例癌旁组织、36例淋巴结转移灶及80例不同类型胃良性病例（浅表性胃炎10例，萎缩性胃炎15例，胃溃疡20例，胃息肉20例，胃腺瘤15例）标本常规制作石蜡包埋切片，CD24和CD44v6染色方法为EnVision免疫组化法。结果: 胃癌病例CD24和CD44v6表达阳性率明显高于癌旁组织和不同类型胃良性病变（P＜0.05或P＜0.01），且阳性表达的良性病例胃黏膜上皮均呈中至重度不典型增生；转移灶CD24和CD44v6表达与相应原发灶呈现高度一致性（P>0.05）；组织学分级Ⅱ级、无淋巴结转移及无远处器官转移胃癌病例CD24和CD44v6表达阳性率明显低于组织学分级Ⅲ或Ⅳ级、淋巴结转移及远处器官转移病例（P＜0.05）。此外，浸润深度T₁-T₂及淋巴结N1站转移病例CD24表达阳性率明显低于浸润深度T₃-T₄和淋巴结N₂、N₃站转移病例（P＜0.05）。结论: CD24和CD44v6表达可能是反映胃癌发生、进展、生物学行为和预后的重要癌干细胞标记物，检测胃良性病例CD24和CD44v6表达水平对预防和早期发现胃癌可能有一定的临床价值。     

Integrin-Mediated Preadipocyte Adhesion and Migration on Laminin-1

Cell adhesion and migration are key events in many biological processes and depend on extracellular matrix proteins. Understanding these cellular events in adipogenesis is paramount to elucidating the biological mechanisms underlying preadipocyte-specific aspects of obesity, diabetes, and adipose tissue development for the design of pharmaceutical screening and tissue engineering strategies. We quantitatively investigated preadipocyte adhesion and migration on laminin-1 surfaces and identified candidate cognate preadipocyte receptors for laminin-1. In adhesion studies, we found that preadipocytes readily adhered to laminin-1 as compared with other extracellular matrix proteins. In addition, immunocytochemical analysis demonstrated that an array of integrin molecules was present on the surface of preadipocytes. Preadipocyte adhesion on laminin-1 was quantitatively assessed using a sedimentation adhesion assay, and results suggested that preadipocyte adhesion to laminin-1 was mediated by the ₁₁ integrin. In addition, digital time-lapse microscopy and quantitative cell tracking revealed that inhibition of the ₁₁ integrin resulted in abrogation of preadipocyte migration on laminin-1 surfaces. These results strongly support the hypothesis that preadipocyte adhesion to and migration on laminin-1 substrata are regulated, in part, by integrins. © 2003 Biomedical Engineering Society. PAC2003: 8717Jj, 8715Kg, 8764Rr, 8714Ee     

非小细胞肺癌中CD44v6的表达

目的　探讨CD4 4v6表达与非小细胞肺癌临床病理特征之间的关系。方法　采用免疫组化S P法检测 132例非小细胞肺癌、6 6例淋巴结转移癌和 115例正常肺组织CD4 4v6表达的情况。结果　非小细胞肺癌CD4 4v6阳性表达率为4 8 4 8% ,高于正常肺组织 17 39%的阳性表达率。CD4 4v6阳性表达与淋巴结转移状况、TNM分期、肿瘤大小和组织学类型有相关性。非小细胞肺癌淋巴结转移组、TNMⅢ期患者、直径 >3cm的肿瘤和鳞癌CD4 4v6阳性表达率分别高于无淋巴结转移组、TNMⅠ期和Ⅱ期患者、直径≤ 3cm的肿瘤和腺癌。淋巴结转移癌CD4 4v6阳性表达率高于肺原发癌。CD4 4v6阳性表达与患者的性别、年龄和组织学分级无相关性。结论　CD4 4v6阳性表达预示非小细胞肺癌具有较强的侵袭和转移能力 ,可作为一项预测非小细胞肺癌转移潜能生物学指标。     

慢性乙型肝炎患者外周血淋巴细胞CD44v6的表达及意义

目的：研究慢性乙型肝炎及乙型肝炎后肝硬化患者外周血淋巴细胞（PBL）CD44v6的表达情况及意义。方法：用流式细胞术分别检测50名健康体检者、30例乙型肝炎病毒（HBV）携带者、60例慢性乙型肝炎患者及60例乙型肝炎后肝硬化患者PBLCD44v6的表达水平。结果：慢性乙型肝炎患者PBLCD44v6表达明显高于正常对照组和HBV携带组（P〈0.01）;肝炎后肝硬化组明显高于慢性乙型肝炎组（P〈0.01）;HBV携带组与正常对照组之间的差异也有统计学意义（P〈0.01）。结论：CD44v6在慢性乙型肝炎HBV致肝细胞损伤过程中可能起着重要作用。