THE PRODUCTION OF INTERLEUKIN-2 BY PERIPHERAL BLOOD MONONUCLEAR CELLS OF HEPATITIS B PATIENTS AND ITS CLINICAL SIGNIFICANCE

The activity of IL-2 produced by activated PBMC in 25 hapatitis B patients including fulminant hepatitis (FH, 6 cases), acute hepatitis (AH, 4 cases), chronic active hepatitis (CAH, 6 cases) and chronic persistent hepatitis (CPH, 9 cases) as well as 11 normal controls was assayed by using splenoblasts as the responding cells. The results showed: (1) The IL-2 activity of all the 25 hepatitis patients were significantly lower than that of 11 normal controls and was lowest in FH patients (P<0.001); (2) The IL-2 activity was correlated with the SGPT activity dynamically in CPH patients (r=-0.4260, P<0.05); (3) The IL-2 activity of hepatitis B patients was related to the positive or negative state of anti-HBc-IgM (P<0. 05); (4) It was the function rather than the number of PBMC that paralleled the IL-2 activity (r<0.3, P>0.05).     

EFFECT OF SUPERNATANT OF PERIPHERAL BLOOD MONONULEAR CELLS FROM NEPHROTIC PATIENTS ON THE SULFATED COMPOUND SYNTHESIS BY CULTURED GLOMERULAR EPITHELIAL CELL

To identify the role of circulating immune factor(s) in the development of proteinuria, the supernatant of peripheral blood mononuclear cells (PBMC) were obtained from 15 patients with steriod-responsive nephrotie syndrome, and its effect on the synthesis of sulfated compound by cultured rat glomerular epithelial cell (GEC) were studied by ~(35)S, ~3H-leucine dual-isotope labelling technique. The result showed that the supernatant of PBMC from 9 patients without steroid treat ment increased ~(35)S uptake in GEC (P<0.01), while there was no significant difference in ~(35)S uptake between the 6 patients treated with prednisone (1.5-2.0 mg/kg.d~(-1)) and 6 normal controls.     

STUDY ON THE RELATIONSHIP BETWEEN STRUCTURE AND BACTERICIDAL ACTIVITY OF THE POLYPEPTIDES DERIVED FROM THE C-TERMINAL HUMAN GROUP ⅡA PHOSPHOLIPASE A2

目的:研究人ⅡA型磷脂酶A2(group ⅡA phospholipase A2,PLA2GⅡA)碳末端衍生多肽的分子结构与杀菌活性的关系.方法:以人PLA2GⅡA一级结构碳末端的26个氨基酸残基为模板,分别合成3条多肽如下:①直链肽P1-26;②将其中一半的碱性氨基酸替换成中性氨基酸的P2-26;③碱性氨基酸(组氨酸和赖氨酸)全被替换成精氨酸的P3-26.采用琼脂铺板计数法测定多肽的杀菌活性.将不同浓度的3种多肽分别与G+菌(枯草杆菌)和G-菌(大肠杆菌)在37 ℃孵育2 h,然后铺板并置于37 ℃恒温箱培养18～24 h,记录每一琼脂板上的菌落数(CFU),并计算多肽作用后的杀菌率.结果:①碱性氨基酸减少的P2-26杀G+菌活性降低,仅为P1-26的1/4,但对G-菌杀菌效应稍增高;②碱性氨基酸全为精氨酸的P3-26杀G+菌和G-菌的活性与P1-26相比均明显降低.结论:人PLA2GⅡA衍生杀菌多肽P1-26的杀菌作用与其所含有的碱性氨基酸密切相关,减少碱性氨基酸的量可以减低它杀G+菌的活性,改变碱性氨基酸的类型也可以影响它的杀菌活性.     

OXIDIZED HIGH-DENSITY LIPOPROTEIN PROMOTES MATURATION AND MIGRATION OF BONE MARROW DERIVED DENDRITIC CELLS FROM C57BL/6J MICE

Objective To explore the influence of oxidized high-density lipoprotein （oxHDL） on the maturation and migration of bone marrow-derived dendritic cells （BMDCs） from C57BL/6J mice.
Methods The C57BL/6J mice bone marrow cell suspension was prepared and purified. Recombinant granulocyte-macrophage colony-stimulating factor （rmGM-CSF） and recombinant interleukin-4 （rmlL-4） were used to promote monocytes to differentiate and suppress lymphocytes. Then 50μg/mL oxHDL was added to stimulate BMDCs, using 50μg/mL high-density lipoprotein （HDL） as homologous protein control, PBS as negative control, and 1 μg/mL lipopolysaccharide （LPS） as positive control. The CD86 and MHCII expression rates were detected with fluorescence-activated cell sorting （FACS）. Liquid scintillation counting （LSC） was used in mixed lymphocyte reactions （MLRs） to reflect the ability of BMDCs in stimulating the proliferation of homologous T cells, Levels of cytokines IL-12 and IL-10 were detected by ELISA. The cell migration was evaluated with the transwell system.
Results Compared with PBS group, the expressions of CD86 and MHCII, counts per minute of MLRs, secretion of IL-12 and IL-10, and number of migrated cells in oxHDL group and LPS group significantly increased （all P 〈 0.05）, while the increment was less in oxHDL group than LPS group. The number of migrated cells in oxHDL group was about twice of that in HDL group.
Conclusion OxHDL may promote the maturation and migration of BMDCs in vitro.     

肺癌患者外周血树突状细胞的体外扩增及生物学特性的观察

目的 从肺癌患者外周血诱导扩增的树突状细胞。观察其形态、表型、抗原递呈功能和对LAK细胞抗肿瘤作用的影响。方法 肺癌患者外周血单个核细胞经GM-CSF、IL-4诱导扩增成为树突状细胞,FACS检测其表型,MLR测定其抗原递呈能力及对LAK细胞增殖的影响。TAA冲击的DC与LAK细胞混合培养诱导的CTL,用MTT法测定其细胞毒,结果 肺癌患乾外周血诱导的树突状细胞具有典型的形态、表型特征和激发MLR的能力,TAA冲击的DC能显著地提高LAK细胞的增殖能力和增强对靶抗原细胞的细胞毒效应。结论 从肺癌患者外周血中可获得典型的树突状细胞,经TAA冲击的DC能从LAK细胞中诱导出特异性CTL细胞,以该DC为基础的疫苗联合LAK细胞,可能在肺癌生物治疗中发挥重要的作用。     

肝癌癌周组织淋巴细胞和TIL的分布及抗瘤活性的研究

目的研究肝癌癌周组织淋巴细胞和肝癌TIL的分布及抗瘤活性。方法用冷胶原酶消化分离法来分离肝癌癌周组织淋巴细胞及肝癌实质部和中心部TIL并测定它们的获得率。用     

肝癌癌周组织淋巴细胞和TIL的分布及抗瘤活性的研究

目的：研究肝癌癌周组织淋巴细胞和肝癌TIL的分布及抗瘤活性，方法：用冷胶原酶消化分离法来分离肝癌癌周组织淋巴细胞及肝癌实质部和中心部TIL并测定它们的获得率，用^3T-TdR释放法测定它们对自体肝癌细胞的杀伤活性。结果：肝癌实质部TIL获得率最高，肝癌癌周组织淋巴细胞获得率次之，肝癌中心部TIL获得率最低，它们对自体肝癌细胞的杀伤活性从高到低则分别为肝癌实质部TIL，肝癌中心部TIL和肝癌癌周组织淋巴细胞，结论：肝癌癌周组织和肝癌组织不同部位的淋巴细胞分布有所不同，它们的抗瘤活性也各不相同，为了获得数量多和抗瘤活性高的淋巴细胞，应尽量从肝癌实质部来分离获取。     

重症肌无力患者外周血单个核细胞中癌蛋白的表达和NK亚群的状况

作者在非胸腺瘤性重症肌无力(MG)患者外周血单个核细胞中检查了C-myc、kiras和Ha-ras三种癌蛋白的表达和自然杀伤细胞(NK)亚群的状况.结果发现,MG患者外周血淋巴细胞和单核细胞中上述三种癌蛋白的阳性率均极显著地高于健康对照组,而患者NK细胞中的Leu 7,11c~+亚群细胞数则显著地低于对照组,提示NK亚群的改变可能与癌蛋白的表达有关.作者认为癌蛋白的高度表达可能与MG患者容易并发胸腺瘤的事实相关.     

流感患者外周血自然杀伤细胞数量的观察

目的：探讨受流感病毒感染患者的机体免疫状态。方法：采用Ｍａｙ－Ｇｒüｎｗａｌｄ－Ｇｉｅｍｓａ染色法对４０例临床诊断为流感患者的外周血大颗粒淋巴细胞（ＬＧＬ）数量变化进行观察。结果：流感患者外周血ＬＧＬ百分率较对照组有显著升高（Ｐ＜００１）。结论：受流感病毒感染患者外周血ＬＧＬ数目增高，有助于病毒感染的控制。     

麻醉手术对乳腺癌患者外周血T细胞亚群的影响

应用抗人Ｔ细胞单克隆抗体ＯＫＴ间接免疫染色法检测２０例乳腺癌患者麻醉前后，外周血Ｔ细胞亚群的比例及白细胞分类的变化。结果显示，术后４８小时，Ｔ３、Ｔ４明显减少，术后７２小时开始恢复。Ｔ４／Ｔ８比值在麻醉后、术中１．５小时、术后２４小时、术后４８小时，均较麻醉前有显著性降低，术后７２小时开始恢复。     

培美曲塞联合顺铂化疗对晚期非小细胞肺癌(腺癌)患者外周血T细胞亚群及NK细胞的影响

目的 探讨培美曲塞联合顺铂化疗对晚期非小细胞肺癌患者细胞免疫功能的影响及其临床意义.方法 对经细胞或组织病理学确诊的40例晚期非小细胞肺癌(腺癌)患者给予培美曲塞500mg/m2,d1静脉滴注,顺铂25mg/m2,d1～d3静脉滴注,21d为1周期,共治疗2个周期.采集正常健康者与患者治疗前后外周血标本,应用流式细胞仪检测C D3、C D4+、CD8T细胞和NK细胞的表达水平.结果 与正常健康者相比,晚期非小细胞肺癌(腺癌)患者化疗前后CD3+、CD4+T细胞、CD4+/CD8+比值和NK细胞水平下降,CD8+T细胞水平升高,差异有统计学意义(P＜0.05);与化疗前相比,化疗后CD3、CD4T细胞、CD4+/CD8+比值和NK细胞水平升高,CD8+T细胞水平下降,差异有统计学意义(P＜0.05).结论 培美曲塞联合顺铂化疗能增强晚期非小细胞肺癌(腺癌)患者的细胞免疫功能,可以将细胞免疫功能作为一项判断患者预后的指标.     

肿瘤患者外周血T淋巴细胞亚群检测及临床意义

目的 探讨不同类型肿瘤患者外周血T淋巴细胞亚群的免疫功能及其临床意义.方法 采用单克隆抗体致敏花环法.结果 肿瘤患者CD3+、CD4+、CD4+/CD8+比值较正常对照组均有明显下降(P<0.01);CD8+明显升高(P<0.01);不同肿瘤组间比较,差异无统计学意义;手术组CD3+、CD4+、CD4+/CD8+比值均比未手术组高,CD8+比未手术组低,但差异均无统计学意义.结论 肿瘤患者普遍存在T淋巴细胞介导的细胞免疫功能下降;检测患者外周血T淋巴细胞亚群表达可用于肿瘤患者的免疫监测.     

用nested RT-PCR法检测肝癌患者外周血癌细胞

目的：寻求一种高灵敏的检测肝癌患者外周血中癌细胞的方法。方法：采用nestedRT－PCR法检测外周血中的肝癌细胞。结果：能从2ml人外周静脉血中检测到10个左右肝癌细胞表达的人甲胎蛋白mRNA。结论：此方法特异性强，灵敏度高，可作为一种理想的临床检测手段。