IL－2R水平在骨髓增生异常综合征中的意义

为了对ＭＤＳ的发生发展和免疫学异常进一步了解，我们用双抗体夹心ＥＬＩＳＡ法检测２０例ＭＤＳ患者血清中ｓＩＬ－２Ｒ水平；采用ＡＰＡＡＰ桥联酶免疫染色观察９例ＭＤＳ患者ＰＢＭＣ中ｍＩＬ－２Ｒ的表达，发现ＭＤＳ患者血清中ｓＩＬ－２Ｒ较正常人增高。在ＭＤＳ亚型中ＲＡＥＢ，ＲＡＥＢ－ｔ组较ＲＡ组增高显著，Ｐ＜０．０１；校再障组也增高。ｍＩＬ－２Ｒ阳性细胞百分率也较正常人高。血清中ｓＩＬ－２Ｒ释放水平与ＰＢＭＣ中ｍＩＬ－２Ｒ的表达比较，两者无明显相关。研究结果表明，ＭＤＳ除髓系细胞累及外，ＩＬ－２Ｒ水平增高可能是ＭＤＳ淋巴细胞异常，免疫系统功能紊乱的一种表现。     

IL—2R水平在骨髓增生异常综合征中的意义

为了对ＭＤＳ的发生发展和免疫学异常进一步了解，我们用双抗体夹心ＥＬＩＳＡ法检测２０例ＭＤＳ患者血清中ＳＩＬ－２Ｒ水平；采用ＡＰＡＡＰ桥联酶免疫染色观察９例ＭＤＳ患者ＰＢＭＣ中ｍＩＬ－２Ｒ的表达，发现ＭＤＳ患者血清中ｓＩＬ－２Ｒ较正常人增高。在ＭＤＳ亚型中ＲＡＥＢ，ＲＡＥＢ－ｔ组较ＲＡ组增高显著，Ｐ＜０．０１；较再障组也增高。ｍＩＬ－２Ｒ的表达比较，两者无明显相关。研究结果表明，ＭＤＳ除髓系细胞累及     

细胞膜上的自电场应力

细胞膜上的自电场应力牛中奇（西安电子科技大学，西安）关键词：细胞膜，介电常数，电场应力ＴＨＥＳＥＬＦ－ＥＬＥＣＴＲＩＣＦＩＥＬＤＳＴＲＥＳＳＥＸＥＲＴＥＤＯＮＣＥＬＬＭＥＭＢＲＡＮＥ￥ＮｉｕＺｈｏｎｇ－ｑｉ（ＸｉｄｉａｎＵｎｉｖｅｒｓｉｔｙ，Ｘｉ＇ａ...     

SLE T细胞功能的改变

探讨Ｔ细胞免疫功能改变与系统性红斑狼疮（ＳＬＥ）的关系。方法 检测３８例ＳＬＥ患者淋巴细胞的Ｅ花环形成率（ＥＲＦ＿Ｒ）,ＰＨＡ刺激的ＰＢＭＣ活化反应（ＰＨＡ淋转反应）,治疗前后血清可溶性ＩＬ－２Ｒ（ＳＩＬ－２Ｒ）、ＩＬ－６及尿ＳＩＬ－２Ｒ、ＩＬ－６水平、抗ｄｓ－ＤＮＡ抗体,用疾病活动性评分（ＳＬＡＭ）判断疾病活动性,进行分析。结果 ＳＬＥ患者腺苷处理前ＥＲＦＲ显著低于正常,处理后ＥＲＦ－Ｒ则显著     

MICROPROCESSOR-BASED SYSTEM FOR MEASUREMENT OF BIOELECTRICAL IMPEDANCE DURING HEMODIALYSIS

ＭＩＣＲＯＰＲＯＣＥＳＳＯＲ－ＢＡＳＥＤＳＹＳＴＥＭＦＯＲＭＥＡＳＵＲＥＭＥＮＴＯＦＢＩＯＥＬＥＣＴＲＩＣＡＬＩＭＰＥＤＡＮＣＥＤＵＲＩＮＧＨＥＭＯＤＩＡＬＹＳＩＳＭＩＣＲＯＰＲＯＣＥＳＳＯＲ－ＢＡＳＥＤＳＹＳＴＥＭＦＯＲＭＥＡＳＵＲＥＭＥＮＴＯＦＢ...     

A NON-INVASIVE AUTOMATIC DETECTING SYSTEM FOR BLOOD FLOW PARAMETERS OF CARDIOVASCULAR SYSTEM

ＡＮＯＮ－ＩＮＶＡＳＩＶＥＡＵＴＯＭＡＴＩＣＤＥＴＥＣＴＩＮＧＳＹＳＴＥＭＦＯＲＢＬＯＯＤＦＬＯＷＰＡＲＡＭＥＴＥＲＳＯＦＣＡＲＤＩＯＶＡＳＣＵＬＡＲＳＹＳＴＥＭＡＮＯＮ－ＩＮＶＡＳＩＶＥＡＵＴＯＭＡＴＩＣＤＥＴＥＣＴＩＮＧＳＹＳＴＥＭＦＯＲＢＬＯＯ...     

A NONLINEAR DISTRIBUTED-LUMPED HYBRID PARAMETER MODEL OF THE ARTERIAL SYSTEM

ＡＮＯＮＬＩＮＥＡＲＤＩＳＴＲＩＢＵＴＥＤ－ＬＵＭＰＥＤＨＹＢＲＩＤＰＡＲＡＭＥＴＥＲＭＯＤＥＬＯＦＴＨＥＡＲＴＥＲＩＡＬＳＹＳＴＥＭＦａｎＹｕｂｏ，ＣｈｅｎＪｕｎｋａｉ，ＫａｎｇＺｈｅｎｈｕａｎｇ，ＹｕａｎＺｈｉｒｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＥｎ...     

ANALYSIS OF AN OPEN-ENDED COAXIAL LINE SENSOR FOR BILAYERED BIOLOGICAL DIELECTRICS MEASUREMENT

ＡＮＡＬＹＳＩＳＯＦＡＮＯＰＥＮ－ＥＮＤＥＤＣＯＡＸＩＡＬＬＩＮＥＳＥＮＳＯＲＦＯＲＢＩＬＡＹＥＲＥＤＢＩＯＬＯＧＩＣＡＬＤＩＥＬＥＣＴＲＩＣＳＭＥＡＳＵＲＥＭＥＮＴＡＮＡＬＹＳＩＳＯＦＡＮＯＰＥＮ－ＥＮＤＥＤＣＯＡＸＩＡＬＬＩＮＥＳＥＮＳＯＲＦＯＲ...     

STUDY AND APPLICATION OF BELT MULTI-POINT PULSE THERAPEUTIC APPARATUS

ＳＴＵＤＹＡＮＤＡＰＰＬＩＣＡＴＩＯＮＯＦＢＥＬＴＭＵＬＴＩ－ＰＯＩＮＴＰＵＬＳＥＴＨＥＲＡＰＥＵＴＩＣＡＰＰＡＲＡＴＵＳＪｉａＸｕｅＱｉ１，ＧｕｏｓｈｅｎｇＹａｎｇ，ＹｉｎｇＣｈｅｎＺ，ＹｕｍｅｉＤｏｎｇ，ＢｉｎｇｅＦｕ（ＤｅｐａｒｔｍｅｎｔｏｆＢ...     

STUDY OF NOVEL MEMBRANOUS MATERIAL FOR CHARCOAL KIDNEY

ＳＴＵＤＹＯＦＮＯＶＥＬＭＥＭＢＲＡＮＯＵＳＭＡＴＥＲＩＡＬＦＯＲＣＨＡＲＣＯＡＬＫＩＤＮＥＹＳＴＵＤＹＯＦＮＯＶＥＬＭＥＭＢＲＡＮＯＵＳＭＡＴＥＲＩＡＬＦＯＲＣＨＡＲＣＯＡＬＫＩＤＮＥＹＧｕＨａｎｑｉｎｇ；ＬｕＭｏｚｕ（Ｔｉａｎｊｉｎｉｎｓｔｉｔｕ...     

营养组合物促进再障小鼠造血干细胞增殖与血红蛋白合成

目的评价促进造血干细胞增殖与血红蛋白合成营养组合物对小鼠再生障碍性贫血造血功能的影响。方法BALB/c小鼠100只,适应性喂养1周后,随机分为:正常对照组、再障模型组及不同剂量的营养组合物组。采用乙酰苯肼、X射线、环磷酰胺联合应用的方法建立再生障碍性贫血小鼠模型,以铅砖屏蔽施以假照射及单纯等量生理盐水相应部位注射为正常对照组。试验第7天开始,营养组合物高、中、低剂量组小鼠每天灌胃,分别给予1445.55,963.7,674.59 mg/(kg·d)营养组合物,直至第45天,颈椎脱臼法处死小鼠,观察试验小鼠的血象、骨髓象、造血细胞内的线粒体、造血干细胞集落的形成及肝脏、脾脏的病理变化。结果营养组合物组的外周血象三系细胞、骨髓有核细胞数、造血干细胞集落的形成明显高于再障模型组(*p<0.05,*p<0.01),且呈剂量-效应关系,促红细胞生成素(EPO)因代偿作用含量显著降低(*p<0.01)。骨髓透射电镜显示,不同剂量的营养组合物组与再障模型组比较,同类造血细胞内线粒体数目明显增多(*p<0.01)。造血干细胞集落实验证明,营养组合物组集落形成率明显高于再障组。不同剂量的营养组合物组与再障模型组相比,肝脏组织水肿减轻,小叶结构明显清晰,肝细胞形态正常,脾脏虽仍有部分充血,但脾小体个数较再障模型组明显增多。结论营养组合物促进再障小鼠外周血细胞生成和骨髓造血干细胞的增殖,促进骨髓造血细胞内线粒体的增加,对肝、脾的损伤具有明显恢复作用。     

Translocation (3;21) characterizes crises in myeloid stem cell disorders.

Three patients, one with Philadelphia (Ph) chromosome positive chronic myelocytic leukemia (CML) and two with primary acquired myelodysplastic syndromes (MDS), have been identified to have a t(3;21)(q26;q22). In the patient with CML, the t(3;21) was detected only in the blast phase. The t(3;21) as the sole abnormality appeared at presentation of MDS [refractory anemia with excess blasts (RAEB)] in one patient and remained as such when progression to RAEB in transformation (RAEB-t) occurred. The other patient with MDS had the t(3;21), in addition to other changes, during the progression of the disease. Thus, t(3;21) may characterize myeloid crises of clonal hematopoietic stem cell disorders (HSCD) and indicates a poor prognosis. As a primary cytogenetic event it may be also involved in the genesis of myelodysplasia with subsequent leukemic transformation.     

再生障碍性贫血患者骨髓单个核细胞端粒长度及P53、P21的表达

目的:研究再生障碍性贫血(AA)患者骨髓单个核细胞(BMMNC)的端粒长度以及P53和P21表达水平,探讨它们与AA发病的关系。方法:采用实时荧光定量聚合酶链反应(RT-qPCR)检测60例AA患者[其中非重型再障(NSAA)38例,重型再障(SAA)22例]和25例对照者BMMNC中端粒长度以及P53和P21的mRNA表达情况;采用Western blot法检测P53和P21蛋白表达情况;并进行相关性比较。骨髓活检术检测骨髓造血细胞成分分布情况;流式细胞术检测CD34~+细胞占有核细胞百分比情况。结果:AA患者端粒长度较对照组明显缩短骨髓造血细胞成分及CD34~+细胞占有核细胞百分比较对照组明显减少(P0.05);NSAA、SAA患者与对照组相比端粒长度均明显缩短,骨髓造血细胞成分及CD34~+细胞占有核细胞百分比均明显减少(P0.05);SAA与NSAA比较,端粒长度明显缩短,骨髓造血细胞成分及CD34~+细胞占有核细胞百分比明显减少(P0.05)。AA患者P53和P21的mRNA及蛋白表达水平均较对照组明显升高(P0.05);NSAA和SAA患者P53和P21的mRNA及蛋白表达水平与对照组相比均明显升高(P0.05);SAA患者P53和P21的mRNA及蛋白表达水平较NSAA明显升高(P0.05)。端粒长度与P53表达水平或P21表达水平之间没有相关性(P0.05);P53表达水平与P21表达水平之间呈正相关(P0.05)。结论:端粒长度的改变以及P53和P21可能参与了再障的发病经过,推测可能是通过抑制造血干细胞的增殖和分化,从而引发造血细胞凋亡。     

sFas、 sFasL及细胞因子在类风湿关节炎疾病中的意义

目的研究sFas,sFasL,细胞因子及抗单链DNA抗体与类风湿关节炎(rheumatoidarthritis,RA)致病的关系及意义。方法采用ELISA法检测32名RA患者的血清标本。结果RA患者血清sFas,sFasL,IL-6及IL-8的水平均高于正常对照组。活动期sFasL,IL-6及IL-8的水平显著高于非活动期(P∨0.01),而sFas的水平未见显著差异。在32例RA患者中,有8例sFas和sFasL的水平同时升高,9例抗单链DNA抗体和sFasL同时升高。结论IL-6和IL-8的水平与RA的炎症程度有关。高浓度的sFas和sFasL可抑制Ts细胞对TH细胞的负向调节。由Fas/FasL启动淋巴细胞凋亡产生的核抗原,可致机体产生抗单链DNA抗体。检测sFas,sFasL,IL-6及IL-8有助于对RA的诊断,并可为RA的免疫生物治疗提供依据。     

抗T细胞单克隆抗体对再生障碍性贫血患者TNF和IL—2水平的影响

为探讨抗Ｔ淋巴细胞克隆抗体对再生障碍性贫血患者免疫功能的调节作用，采用放射免疫检测２５例ＡＡ患者ＭｃＡｂ－Ｔ治疗前后血清肿瘤坏死因子和白细胞介素－２（ＩＬ－２）水平及其中１０例周围血单个核细胞体外诱生ＴＮＦ和ＩＬ－２水平的变化。     

Point mutations in the AML1/RUNX1 gene associated with myelodysplastic syndrome

Myelodysplastic syndrome (MDS) is a clonal disorder of hematopoietic stem cells characterized by ineffective and inadequate hematopoiesis. Because MDS is a heterogeneous disorder, specific gene abnormalities implicated in the pathogenesis of MDS have been difficult to identify. Cytogenetic abnormalities are seen in half of the MDS patients and generally consist of partial or complete chromosome deletion or addition, whereas balanced translocations are rare. Although point mutations of critical genes had been demonstrated to contribute to the development of MDS, there was no strong correlation between these mutations and clinical features. Recently, we reported the high incidence of somatic mutations in the AML1/RUNX1 gene (which is a critical regulator of definitive hematopoiesis and the most frequent target for translocation of acute myeloid leukemia [AML]) in MDS, especially refractory anemia with excess blasts (RAEB), RAEB in transformation (RAEBt), and AML following MDS (defined here as MDS/AML). The MDS/AML patients with AML1 mutations had a significantly worse prognosis than those without AML1 mutations. Most AML1 mutants lose trans-activation potential, which leads to a loss of AML1 function. These data indicate that AML1 point mutation is one of the major causes of MDS/AML, and "MDS/AML with AML1 mutation" represents a distinct clinicopathologic-genetic entity.     

In vitro proliferation and differentiation of megakaryocytic progenitors in patients with aplastic anemia, paroxysmal nocturnal hemoglobinuria, and the myelodysplastic syndromes

It has previously been shown that patients with aplastic anemia (AA) have a stem cell defect both of proliferation and differentiation. This has been shown by long-term bone marrow (BM) culture, long-term initiating cell assays, and committed progenitor assays. We present, for the first time, data on megakaryocyte (Mk) colony formation from purified BM CD34(+) cells from patients with AA. The results are compared with those from normal controls and from patients with paroxysmal nocturnal hemoglobinuria (PNH) and the myelodysplastic syndromes (MDSs). Those treated for AA had previously received immunosuppression (antithymocyte globulin and/or cyclosporin). No patients had received bone marrow transplantation. A total of 13 AA patients (five untreated, eight treated), six PNH, six MDS, and 13 normal donors were studied. BM CD34(+) cells were purified by indirect labeling and then cultured in a collagen-based Mk assay kit (MegaCult-C, StemCell Technologies). The cultures were fixed on day 12, and the Mk colonies were identified by the alkaline phosphatase anti-alkaline phosphatase technique using the monoclonal antibody CD41 (GP IIb/IIIa). The slides were scored for Mk colony-forming units (CFU-Mks) (3-20 and >20 cells), Mk burst-forming units (BFU-Mks) (>50 cells), and mixed colonies. The results show that total Mk colony formation in AA was significantly lower than in normal donors (p<0.0001), both in untreated patients/nonresponders to treatment (p = 0.0001) and in complete/partial responders (p<0.002). There was no significant difference in Mk colony formation in treated and untreated patients (p = 0.05). Patients with AA had a lower total colony formation than PNH patients (p = 0.0002). PNH patients exhibited lower colony formation than normal controls (p = 0.03), as shown by MDS patients, although the considerable number of variables resulted in a lack of statistically significant difference from normal controls (p = 0.2). We have now shown that Mk colony formation from purified BM CD34(+) cells is significantly reduced, supporting previous evidence that AA results from a stem cell defect.     

再生障碍性贫血患者外周血T细胞亚群和T细胞受体表达水平及其意义

采用流式细胞仪及间接免疫荧光法检测30例再生障碍性贫血患者外周血中T细胞亚群及T细胞表面受体表达水平,并与健康对照组相比,结果表明:70％再障患者存在CD4/CD8比例倒置及CD8~+％异常增高;50％再障患者外周血γδ-T细胞亚群及其在T淋巴细胞总体中所占比例均显著增高;而αβT细胞亚群及TirA~+细胞百分率与正常对照组相比无显著性差异。提示:半数以上再障患者外周血中存在异常增多的γδT细胞及Ts细胞亚群。并可通过其直接或间接作用抑制造血,从而导致再障的发生。     

骨髓增生异常综合征患者骨髓涂片的免疫表型分析

目的 检测骨髓增生异常综合征（MDS）患者的免疫表型特征,探讨对其早期诊断及分型诊断的价值.方法 采用免疫细胞化学法中的生物素-亲和素桥联碱性磷酸酶酶标法（ABC-AP）对60例初诊的MDS患者、14例再生障碍性贫血（AA）患者及21例正常对照的骨髓单个核细胞（MNC）进行免疫表型检测.结果 CD41阳性的淋巴样小巨核细胞在MDS组中较特异出现,且以难治性细胞减少伴多系异常（RCMD）组出现率最高;与正常对照组比较,MDS组中的难治性贫血伴原始细胞增多（RAEB）组CD13、CD33和CD34抗原表达升高,CD3抗原表达下降;RCMD组CD13和CD33抗原表达升高,CD34抗原表达升高不明显,CD3抗原表达下降;难治性贫血/环形铁粒幼细胞性难治性贫血（RA/RAS）组CD13、CD33、CD34、CD3抗原表达均无明显特征性变化.结论 酶标淋巴样小巨核及免疫表型CD3、CD13、CD33、CD34检测有助于MDS的早期诊断及分型诊断.