凝血酶对人重组内皮细胞衍生IL—8融合蛋白转换作用

本文报道利用基因工程技术在大肠杆菌中表达出入内皮细胞衍生IL-8(EDhIL-8)与细菌蛋白lacZ 的融合蛋白lac-hIL-8和lac-T-hIL-8,后者含有一个人工合成凝血酶切点。EDhIL-8上含有一个凝血酶切点,凝血酶可以将lac-hIL-8及以前表达的MS2-hIL-8水解为有生物活性的天然IL-8,而对含有两个凝血酶切点的lac-T-hIL-8无水解作用。这些结果提示凝血酶的功能不仅依赖于所识别的氨基酸,而且依赖于这些氨基酸形成的构象。     

Lymphokine-activated killer (LAK) cells modulate the effects of IL-2 on a T cell-mediated immune response.

The ability of LAK cells and/or IL-2 to affect the course of an established T cell response was examined in a delayed-type hypersensitivity (DTH) model. IL-2 greatly increased the magnitude of the response at 24 h, while LAK cells alone had no effect. The administration of LAK cells and IL-2 together also had no effect on the magnitude of the DTH response, demonstrating that LAK cells were able to remove the enhancement seen with IL-2 alone. The presence of LAK cells reduced the serum half-life of IL-2 significantly, but not to an extent able to account for the observed loss of IL-2 induced DTH enhancement. IL-2 administration influenced cell phenotypes in the spleen and draining lymph nodes (DLN), as well as increasing splenic weight; the additional presence of LAK cells markedly altered these effects of IL-2 in the spleen (but not the DLN). Taken together, these results suggest that LAK cells interact with activated T-cells within the immune system and modulate their function.     

Immune adjuvants for chemotherapy or radiotherapy in the 9L rat brain tumor model

Summary The therapeutic efficacy and toxicity of three biological response modifiers,Corynebacterium parvum (Cp), Chinese blister beetle extract (CBBE), recombinant human IL-1 (rhIL-1), used alone or in combination with chemotherapy or radiotherapy, were investigated in the intracerebral (ic) rat 9L brain tumor model. Used alone, Cp (2mg/rat, ip plus 70g/rat, ic), CBBE (5l of an ethanol extract, ic), or IL-1 (lg/rat, ic or 1g/rat × 3, q 3 d, ic), had no effect on animal survival compared to the untreated or saline treated controls. When combined with chemotherapy or radiotherapy, the three immunotherapeutic agents did not show any additive effects on survival compared to that observed with systemic BCNU (12mg/kg), local ic bleomycin (0.25 unit), or local radiotherapy (16 Gy). While ic IL-1 did not produce evident toxicity, there was fatal toxicity caused by ic Cp or CBBE treatment in a few animals. The combination of Cp and bleomycin produced severe neurotoxicity, resulting in the early death of animals. This study demonstrates a lack of efficacy of the nonspecific immune adjuvants IL-1, Cp or CBBE, used either alone or combined with cytotoxic chemotherapy or radiotherapy, in this rat brain tumor model.     

胃肠道间质瘤的免疫组化诊断及P53和P21表达

目的：探讨胃肠道间质瘤（GIST）的诊断及鉴别诊断。方法：GIST患50例,进行常规检查及P^53/P^21,HHF－35,vimentin,CD34免疫组化检测。结果：本组50例GIST,恶性34例,交界性10例,良性6例,以胃及小肠为多发（68％）。免疫组化以平滑肌细胞分化为主型占46％,神经源分化型占18％,平滑肌和神经双向分化型18％,未分化型24％。肌肉共同蛋白HHF－35为平滑肌细胞分化最敏感的标志物。未分化型间质瘤的免疫表型为vimentin和CD34阳性。P^53蛋白和P^21蛋白对GIST的良恶性可资鉴别。结论：尽管胃肠道间质瘤光镜下形态相似,但其免疫表型呈异源性,需要做免疫组化准确定性。     

异基因外周血干细胞的动员,检测及临床移植的应用研究

目的：探讨异基因外周血干细胞移植（ａｌｌｏ－ＰＢＳＣＴ）供者经Ｇ－ＣＳＦ或Ｇ－ＣＳＦ＋ＧＭ－ＣＳＦ动员后,采集的外周血干细胞（ＰＢＳＣ）移植物中的幼稚粒细胞与单个核细胞（ＭＮＣ）、ＣＤ３４＾＋细胞及ＣＦＵ－ＧＭ之间的相关性和移植的剂量标准及临床应用效果。方法：对１１例ａｌｌｏ－ＰＢＳＣＴ供者用Ｇ－ＣＳＦ（９例）或Ｇ－ＣＳＦ＋ＧＭ－ＣＳＦ（２例）进行动员,于动员前及动员后,分别对外周血及ＭＮＣ惧物中的幼稚粒细胞、ＣＤ３４＾＋细胞及ＣＦＵ－ＧＭ进行检测计数,预处理方法主要用大剂量环磷酰胺（ＣＴＸ）＋全身照射（ＴＢＩ）。结果：动员后外周血中的幼稚粒细胞与ＣＤ３４＾＋细胞及ＣＦＵ－ＧＭ同步增加,外周血ＭＮＣ中的幼稚粒细胞数与ＣＤ３４＾＋细胞数及ＣＦＵ－ＧＭ有较好的相关性。１１例患者全部植活和恢复造血功能,并为染色体核型     

抗子宫内膜抗体、IL-4、IFN-γ在子宫内膜异位症患者局部及外周的变化

目的　探讨子宫内膜异位症病人体内免疫学改变。方法　对１８例正常生育期的妇女及３４例各期内膜异位症的患者分别检测其血清及腹腔液中抗子宫内膜抗体、ＩＬ４、ＩＦＮγ的水平。结果　血清中内异症组与对照组比较抗子宫内膜抗体阳性率有显著性差异（Ｐ＜０．００５）;ＩＬ４水平在腹腔液中内异症各期与对照组比较及内异症Ⅰ期与Ⅱ期以上组间比较均有显著性差异（Ｐ＜０．０５,Ｐ＜０．０５,Ｐ＜０．０５）。血清中ＩＬ４水平在内异症Ⅱ期以上组与对照组相比有显著性差异（Ｐ＜０．０５）。ＩＦＮγ在腹腔液中内异症各期组与对照组比较均有显著性差异（Ｐ＜０．０５,Ｐ＜０．０１）。结论　子宫内膜异位症腹腔液中ＩＬ４、ＩＦＮγ变化较血清中明显。随着内异症期别的增加,腹腔液ＩＬ４、ＩＦＮγ均有上升的趋势,尤以ＩＬ４升高更为明显。子宫内膜异位症血清中抗子宫内膜抗体的变化较腹腔液中明显。     

A Dutch family with progressive sensorineural hearing impairment linked to the DFNA2 region

We studied a Dutch family with DFNA2-linked progressive sensorineural hearing impairment (SNHI). Recent audiograms were obtained from 18 of the affected persons (age 7–81 years) and were used in a gene-linkage analysis. Linear regression analysis of the audiograms, using binaural mean thresholds, disclosed on average a descending slope of approximately 10 dB/octave at any age and an annual threshold increase at any frequency of about 0.7 dB/year. There may have been substantial congenital impairment at higher frequencies, but longitudinal analysis of hearing impairment in the youngest case, who was followed from age 5 years, suggested that the most significant changes in hearing may have occurred in the first two decades of life. Linkage analysis was carried out with special attention to the DFNA2 region because hearing trends were very similar to families previously linked to DFNA2. Linkage to DFNA2 was established with maximum lod scores of 4.7 and 3.2 for the flanking markers of the DFNA2 region (D1S432;MYCL1). Received: 25 February 1999 / Accepted: 11 June 1999     

妊高征母亲早产儿IL—6和GM—CSF检测的意义

目的:探讨妊高征母亲早产儿的IL-6和GM-CSF变化.方法:用ELISA方法检测11例妊高征母亲娩出早产儿的IL-6和GM-CSF并与11例正常新生儿对照组比较.结果:妊高征母亲早产儿的IL-6(1084±113pg/m1)和GM-CSF(144士20.1pg/ml)均较正常对照组增高(P＜0.01).结论:IL-6和GM-CSF可能在妊高征及早产中发挥重要作用.     

自体外周血干细胞动员和采集的研究

目的　探索理想的血液肿瘤外周血干细胞动员方案。方法　选择 15例恶性血液病患者 ,14例应用米托蒽醌 (2 0mg/m2 ) 阿糖胞苷 (8g/m2 ) 粒细胞集落刺激因子 (G -CSF ,惠尔血 30 0 μg/d ,从白细胞 <1× 10 9/L开始至采集完成 ) (MAG) ;1例多发性骨髓瘤应用环磷酰胺 (4 g/m2 ) G -CSF(CG)。用CS - 30 0 0Plus血细胞分离机采集单个核细胞。处理血量约 2 0 0ml/kg ,历时 3～ 4h。直至CD34 细胞数 >4× 10 6/kg为止。 结果　 14例用MAG方案者中 ,一次采集即采到CD34 细胞 2× 10 6/kg以上者 11例 (79% ) ,其中 9例 (6 4% ,9/14)达 4× 10 6/kg以上。通过测定采集日外周血中CD34 细胞数可预测一次采集足量干细胞的可能性 (P <0 .0 0 1)。 2例部分缓解者动员后获完全缓解 ,1例Ph阳性小克隆和 1例AML1/ETO基因在动员后转阴。移植 14例可评价者中 10例存活至今 (3～ 5年 ) ,4例 (Ph 杂白、L2和L3型急淋、急单各 1例 )复发死亡。结论　MAG具有抗瘤和动员双重作用。外周血CD34 细胞数与采集成功与否相关性佳     

急性胰腺炎患者IL-6、TNFα水平测定及临床意义

目的研究急性胰腺炎患者IL-6、TNFα分泌情况及其临床意义。方法选择30例急性胰腺炎患者和28例健康对照,用生物学方法检测血浆中IL-6、TNFα的水平。结果急性胰腺炎患者血浆中IL-6、TNFα分别为(76．4±10．1)k u/L、60．7％±12．3％,均高于正常对照组(20．8±6．1)ku/L、12．4％±4．7％,随疾病的恢复逐渐趋于正常(28．5±9．1)ku/L、18．8％±6．4％。结论急性胰腺炎患者血浆中的IL-6、TNFα水平均高于正常组,说明二者参与这一炎症过程。