系统性红斑狼疮病人血T,B淋巴细胞Bcl—2的表达

目的：探讨Ｂｃｌ－２在系统性红斑狼疮（ＳＬＥ）发病机制中作用。方法：采用流式细胞仪双标记法检测３１例ＳＬＥ病人外周血Ｔ、Ｂ细胞Ｂｃｌ－２蛋白表达。结果：发现活动期ＳＬＥ病人活动期ＳＬＤ病人ＣＤ３＾＋、ＣＤ４＾＋和ＣＤ８＾＋Ｔ细胞Ｂｃｌ－２蛋白表达明显高于非活动期ＳＬＥ病人、其他疾病组和正常对照组。ＣＤ１９＾＋Ｂ细胞Ｂｃｌ－２蛋白表达在各组之间并无统计学差异。ＣＤ３＾＋Ｔ细胞Ｂｃｌ－２蛋白表达的平均     

原癌基因HER2／neu表达产物p185蛋白免疫原性研究

用表达ｐ１８５蛋白ＨＥＲ２／ｎｅｕ转基因３Ｔ３－ＨＥＲ２／ｎｅｕ细胞裂解物免疫Ｂａｌｂ／ｃ小鼠，经３次免疫后，免疫小鼠脾细胞对表达ｐ１８５蛋白的３Ｔ３－ＨＥＲ２／ｎｅｕ细胞呈现较强的增殖反应（平均刺激指数分别为ＳＩ＝３．１５±１．８８），而对未转染ＨＥＲ２／ｎｅｕ基因的３Ｔ３细胞的应答较弱（ＳＩ＝１．１４±０．９７）。并检测到１号免疫鼠脾细胞对３Ｔ３－ＨＥＲ２／ｎｅｕ细胞有特异杀伤作用。免疫鼠血清中出现高水平的抗ｐ１８５抗体（ＯＤ均值＝１．０２±０．１６），较正常对照组（ＯＤ均值＝０．３６±０．１０）有显著差异（Ｐ＜０．００１），表明ＨＥＲ２／ｎｅｕ表达产物ｐ１８５蛋白具有免疫原性，用于免疫小鼠可诱导出对ｐ１８５蛋白的特异免疫应答反应。     

何杰金病中EB病毒感染和bcl—2蛋白的表达

目的探讨Ｅｐｓｔｅｉｎ－Ｂａｒｒ（ＥＢ）病毒与ｂｃｌ－２基因的关系。方法利用免疫组织化学ＬＳＡＢ法检测了６４例何杰金病ＥＢ病毒的潜在膜蛋白－１（ＬＭＰ－１）和ｂｃｌ－２蛋白的表达。用原位杂交方法检测了４１例何杰金病组织中的ＥＢＥＲ。又用双重染色的方法检测了７例ＥＢＥＲ和ｂｃｌ－２蛋白双阳性的何杰金病例。结果ＬＭＰ－１和ＥＢＥＲ的阳性率分别为３９％和４４％,所有ＥＢＥＲ阳性的病例ＬＭＰ－１均为阳性。ｂｃｌ－２蛋白的阳性率为２３％,其中仅有７例ＬＭＰ－１和ｂｃｌ－２蛋白同时阳性。双重染色结果为,在７例双阳性病例中ｂｃｌ－２阳性的细胞只有约５０％ＥＢＥＲ阳性,约４０％ＥＢＥＲ阳性的肿瘤细胞ｂｃｌ－２阳性。结论研究结果提示,在本组研究的病例中Ｒ－Ｓ细胞的ｂｃｌ－２蛋白的表达与ＥＢ病毒的存在与否无明显相关性。     

c-erbB-2、p53、bcl-2和nm23-H1在肺癌中的表达

目的：探讨ｃｅｒｂＢ２、ｐ５３、ｂｃｌ２和ｎｍ２３Ｈ１基因在肺癌发生发展过程中的作用。方法：用免疫组化ＡＢＣ法对原发性肺癌组织中４种基因的表达和突变进行检测。结果：５８例肺癌中,３１例（５３４５％）ｐ５３过度表达,１８例（３１０３％）ｂｃｌ２过度表达。ｃｅｒｂＢ２与ｎｍ２３Ｈ１在１０例小细胞肺癌（ＳＣＬＣ）中未见表达。而在４８例非小细胞肺癌（ＮＳＣＬＣｓ）中两者过度表达率均为５０％。ｃｅｒｂＢ２与ｎｍ２３Ｈ１表达呈正相关（Ｐ＜００５）。腺癌ｎｍ２３Ｈ１的表达明显高于鳞癌（Ｐ＜００５）。ｐ５３、ｂｃｌ２蛋白表达在肺癌分化程度中呈负相关（Ｐ＜００５）。ｎｍ２３Ｈ１、ｐ５３和ｂｃｌ２的表达与患者的生存率有关（Ｐ＜００５）。结论：ｃｅｒｂＢ２、ｐ５３、ｂｃｌ２和ｎｍ２３Ｈ１基因蛋白产物的检测对肺癌患者的诊治和预后评估有积极意义。     

淋巴组织增生性疾病组织中c-myc基因表达及其与EB病毒LMP基因的关系

目的：探讨ｃ－ｍｙｃ基因的表达与淋巴瘤发生及其与ＥＢ病毒ＬＭＰ基因的关系。方法：用免疫组织化学方法，对２１２例以前作过ＥＢ病毒ＬＭＰ（潜伏感染膜蛋白）基因原位杂交检测的淋巴组织增生性疾病组织中ｃ－ｍｙｃ基因的表达进行检测。结果：显示ｃ－ｍｙｃ阳性率霍奇金淋巴瘤（ＨＤ）为８３．６７％、非霍奇金淋巴瘤（ＮＨＬ）为８４．３４％，均显著高于淋巴组织良性增生病例ｃ－ｍｙｃ阳性率（５４．２８％）（Ｐ＜０．０１）；淋巴瘤中ＥＢ病毒ＬＭＰ阳性病例ｃ－ｍｙｃ阳性率（１００％）显著高于ＥＢ病毒ＬＭＰ阴性病例（８０．５６％）（Ｐ＜０．０１）。结论：（１）ｃ－ｍｙｃ的高度表达与淋巴瘤的发生有关。（２）ＥＢ病毒可能通过激活ｃ－ｍｙｃ基因而参与淋巴瘤的发生。     

人类bcl—2cDNA在NIH／3T3细胞中的表达

将０．９１ｋｂ的含有完整开放阅读框的人类ｂｃｌ－２ｃＤＮＡ以正向克隆于逆不病毒载体ｐＬ－ＸＳＮ的ＥｃｏＲ１位点，经ＰＡ３１７细胞包装后感染ＮＩＨ／３Ｔ３细胞，筛选出Ｇ４１８抗性克隆，经免疫印迹证实人类ｂｃｌ－２ｃＤＮＡ在ＮＩＨ／３Ｔ３细胞中获得了表达，这一表达人类Ｂｃｌ－２蛋白的哺乳类细胞模型的建立探讨ｂｃｌ－２的作用机制及其与其它基因间关系的研究奠定了基础。     

肝细胞提取物对肝癌细胞（BEL—7402）凋亡相关基因表达的影响

肝细胞提取物经ＨＰＬＣ，ＦＰＬＣ进一步分离纯化，得到了单一色谱峰，激光飞行时间质谱仪测分子量为４．０２０ｋＤ该单一组分（Ｓ４）对ＢＥＬ－７４０２肝癌细胞有增殖回落作用，半数抑制浓度（ＩＣ５０）为７．５８ｍｇ／Ｌ。对ＢＥＬ－７４０２细胞的基因表达影响研究，Ｓ４对Ｐ５３，Ｆａｓ表达有增强作用，而抑制Ｂｃｌ－２，ｃ－ｍｙｃ的表达，Ｓｏｕｔｈｅｒｍｂｌｏｔ技术表明，Ｓ４可抑制Ｂｃｌ－２的ｍＲＮＡ转录，提示     

恶性疟原虫保护性抗的复合基因——豆苗病毒重组活疫苗株的构建

将本实验室合成的一段编码恶性疟原虫不同发育阶段抗原表位基因，包括裂殖子表面怕ＭＳＡ１、ＭＳＡ２、环子孢子蛋白ＣＳＰ及环状体感染经细胞表面蛋白ＲＥＳＡ以及来自白细胞介素－１（ＩＬ－１）和破伤风类毒素（ＴＴ）上Ｔ细胞激活点等的抗原基因（ＨＧＦＳＰ）。先定向克隆人ＰＳＫ载体的ＥｃｏＲＩ、ＢａｍＨＩ位点，后用ＥｃｏＲＩ单酶切，补平及用ＳａｃⅠ单酶切下手目的基因再定向克隆人痘苗病毒表面载体ＰＪ２－１６的Ｓｍ     

高胆固醇血症大鼠LDL受体与apoA－1mRNA的水平变化及苯甲酸雌二醇对其影响

本文研究了实验性高胆固醇血症大鼠肝及小肠中低密度脂蛋白（ＬＤＬ）受体ｍＲＮＡ和载脂蛋白（ａｐｏ）Ａ－１ｍＲＮＡ的水平变化以及苯甲酸雌二醇（ＥＢ）对二者的影响。发现高脂（ＨＣ）组肝及小肠ＬＤＬ受体ｍＲＮＡ水平分别低于正常组５０％和６０％（Ｐ＜０．０５），小肠ａｐｏＡ－１ｍＲＮＡ水平低于正常组５８％（Ｐ＜０．０５），此时血清总胆固醇（ＴＣ）及ＬＤＬ胆固醇（ＬＤＬ－ｃ）均明显高于正常组（Ｐ＜０．０１），血清ａｐｏＡ－１低于正常组（Ｐ＜０．０５）。ＨＣ＋ＥＢ组血清ＴＣ及ＬＤＬ－ｃ明显低于ＨＣ组，而肝ＬＤＬ受体ｍＲＮＡ水平则显著高于ＨＣ组，为ＨＣ组的３．５倍（Ｐ＜０．００２）。结果提示：（１）高胆固醇负荷时细胞可通过转录水平下行调节ＬＤＬ受体；（２）小肠可能在ａｐｏＡ－１的代谢中起重要作用；（３）ＥＢ可能通过诱导肝ＬＤＬ受体基因表达而降血脂。     

急性丙型肝炎患者免疫状况的研究

用间接免疫荧光法、酶联免疫吸附试验（ＥＬＩＳＡ）及ＬＤＨ释法，对１６例急性输血后丙型肝炎（抗－ＨＣＶ、ＨＣＶ－ＲＮＡ均阳性）患者，分别进行外周血单个核细胞（ＰＢＭＣ）的Ｔ细胞亚群计数、Ｔ４／Ｔ８比值、Ｔａｃ受体的检测及血清可溶性白细胞介素２受体（ｓＩＬ－２Ｒ）ＮＫ细胞活性的测定。并与正常人组比较，经ｔ检验发现，急性丙型肝炎患者的Ｔ４亚群所占百分比、Ｔ４／Ｔ８比值及ＰＢＭＣＴａｃ受体表达均明显低于正常人组（Ｐ＜０．０５），而ＮＫ细胞活性、血清ｓＩＬ－２Ｒ明显高于正常人组（Ｐ＜０．０５）。患者的这些免疫状态改变，可能对其发病机理的研究有一定意义。     

Abnormal production of B cell growth factor in patients with systemic lupus erythematosus.

In order to clarify the role of B cell growth factor (BCGF) in the pathogenesis of systemic lupus erythematosus (SLE), BCGF production by peripheral blood mononuclear cells (PBMC) and T cells was studied using a new bioassay for BCGF activity. For this purpose, we established an Epstein-Barr (EB) virus-transformed B cell line KS-3.F10 that proliferates only in response to two B cell-specific BCGF, low-mol. wt BCGF (LMW-BCGF) and high-mol. wt BCGF (HMW-BCGF). PBMC from active SLE patients produced less BCGF when stimulated with phytohaemagglutinin (PHA) compared with controls. The decreased BCGF production by PHA-stimulated PBMC from active SLE reverted to control values when SLE became inactive. However, PHA-stimulated T cells from active SLE patients produced more BCGF compared with controls, whereas those from inactive SLE showed normal BCGF production. Spontaneous BCGF production by T cells was not observed in active SLE patients. These findings suggest that decreased BCGF production by SLE PBMC is due to excessive BCGF consumption by B cells in vitro and that SLE T cells produce large amounts of BCGF with appropriate immune stimuli in vivo to promote polyclonal B cell activation.     

伴侣素包含T复合蛋白1ε亚基(CCT5)是与人γδT细胞相关的自身抗原

目的探讨CCT5与γδT细胞及自身免疫病的关系。方法 PCR扩增人CCT5的基因,表达并纯化CCT5重组蛋白;用3条CCT5蛋白的肽段免疫小鼠,制备并筛选抗CCT5的单克隆抗体;固相化CCT5重组蛋白,体外扩增人外周血单个核细胞中的γδT细胞;用制备的单抗通过ELISA检测正常人、类风湿性关节炎(RA)及系统性红斑狼疮(SLE)患者血浆中CCT5蛋白的含量;用流式细胞技术分析不同亚型γδT细胞的比例,并与血浆CCT5含量做相关性分析。结果 PCR扩增获得CCT5基因,目的片段长度为1 750 bp;经SDS-PAGE分析可见重组CCT5蛋白分子质量约为65 ku,并获得了纯化。通过筛选,获得两株抗CCT5单克隆抗体对。重组CCT5蛋白能在体外扩增外周血γδT细胞;而血浆CCT5浓度与Vγ9和Vδ2 T细胞的比例呈显著正相关。在RA及SLE患者血浆中,可溶性CCT5的浓度显著低于正常对照(P0.05)。结论 CCT5是与人Vγ9δ2γδT细胞识别的相关自身抗原,有助于我们深入了解Vγ9δ2γδT细胞在自身免疫病中的作用。     

The in vitro production of anti-nuclear antibodies by human peripheral blood mononuclear cells. Demonstration of T cell requirement and soluble inducing factor(s) for anti-nuclear antibodies triggering in patients with systemic lupus erythematosus.

Peripheral blood mononuclear cells (PBMC) of 29 patients with systemic lupus erythematosus (SLE) and 14 normal individuals were investigated for the in vitro production of anti-nuclear antibodies (ANA). Twenty-eight of 29 SLE patients but only one control spontaneously produced ANA in unstimulated PBMC. Pokeweed mitogen induced ANA synthesis in six controls. No detectable ANA was observed in B cell enriched fraction except in two cases of SLE. Recombination of B + T cell enriched fractions and PBMC supernatants from SLE patients could induce B cells to synthesize ANA. These results indicate that: (1) SLE patients spontaneously produced ANA in vitro whereas controls rarely did; (2) autoreactive clones exist in normal individuals but are kept under control and (3) T cell help is required for ANA triggering.     

正常人T细胞和胸腺细胞中多种新的TCRδRec基因重排

利用巢式或半巢式PCR扩增10例正常人外周血单个核细胞(PBMC)、4例分选CD3~+细胞和7例正常胸腺细胞DNA中TCR δRec区与Jδ1、Dδ3和Ja重排的基因片段,分析正常人外周血T细胞和胸腺细胞中TCR δRec基因重排情况。克隆性PCR产物进一步进行核苷酸序列分析确定其重排位置。结果发现了4种新的TCR δRec重排,包括TCR δRec_(149321)-Jδ1、TCRδRec_(149820)-Jδ1、TCR δRec_(151657)(Nx)-Ja和TCR δRec_(153199)-Jδ1等,其中以TCR δNx的重排最多见,通过利用不同模板DNA的PCR分析发现δRec重排在外周血和胸腺细胞中有所不同。结果显示TCR δNx-Jδ1重排在成熟和不成熟T细胞发生频率均较高,而TCR δNx-Dδ3重排在不成熟T细胞中发生率较高。但所有重排均不表达于mRNA中。本研究结果为TCR δ基因重排的研究补充了一些新的数据。     

The in vitro production and regulation of anti-double stranded DNA antibodies by peripheral blood mononuclear cells from normals and patients with systemic lupus erythematosus.

The in vitro production of anti-double stranded DNA antibodies (anti-DNA) by peripheral blood mononuclear cells (PBMC) was investigated in 19 patients with systemic lupus erythematosus (SLE) and in 12 normal individuals, using a micro solid phase enzyme immunoassay. PBMC from SLE patients spontaneously produced anti-DNA with a higher frequency (16 of 19) than did PBMC of controls (three of 12). In addition SLE patients produced predominantly IgG antibodies. PWM and DNA enhanced anti-DNA synthesis is spontaneously low and non-producers, but acted as inhibitors in spontaneously high producers. The partial removal of T cells decreased or abolished anti-DNA synthesis in four of nine SLE patients. In contrast the B cell enriched fractions of five of nine SLE and five of seven normal patients produced the same or higher anti-DNA levels than did the corresponding unseparated PBMC. These results suggest evidence for autoreactive B cells in SLE as well as in normals, and therefore the combination of these autoreactive B cells with helper and/or suppressor T cell disorders could lead to the over production of anti-DNA seen in different patients with SLE.     

The presence of antibodies to purified p24gag protein of HTLV-I in sera of patients with systemic lupus erythematosus (SLE)

Sera of patients with systemic lupus erythematosus (SLE) were tested for their reactivity to HTLV-I by western blotting (WB). Seven (18%) of 40 SLE serum samples reacted to the p24^gag protein of HTLV-I by WB using purified gag antigens. The specificity of anti-p24^gag antibodies in the SLE sera was confirmed by competitive inhibition on WB. Two of the seven patients were shown to be HTLV-I carriers, because HTLV-I infected T cell lines were easily established from their peripheral blood mononuclear cells (PBMC). Except for these two carrier patients, the gag proteins were not detected in the lysates of PBMC by WB using anti-p24^gag and anti-p19^gag monoclonal antibodies. The gag and pX genes of HTLV-I were not detected by PCR in PBMC of the SLE patients, with the exception of the 2 HTLV-I carrier patients. These results show no direct involvement of HTLV-I in the etiology of SLE. However, the existence of a specific antibody to p24^gag in the sera of some of the noncarrier SLE patients suggests a crossreactivity to either unknown viruses or some autoantigens.