乙肝患者血清HBV—DNA与e,c系统相关分析及临床意义

对３７４乙型肝患者血清用地高辛探针法检测ＨＢＶ－ＤＮＡ；用酶联法检测ＨＢｅＡｇ、抗ＨＢｅ、ＨＢｃＡｇ、抗ＨＢｃ－ＩｇＭ。结果：ＨＢＶ－ＤＮＡ与ＨＢｅＡｇ、抗ＨＢｅＡｇ、抗ＨＢｅ无明显相关（Ｐ〉０．０５），与ＨＢｃＡｇ、抗ＨＢＣ－ＩｇＭ呈正相关关系（ｒ＝０．１８－０．２，Ｐ〈０．０１）；ＨＢｅＡｇ组与抗ＨＢｅ组ＨＢＶ－ＤＮＡ检出率无明显差异（Ｐ〉０．０５），以ＨＢＶ－ＤＮＡ为标准评价ＨＢｅＡｇ、ＨＢ     

Herpes simplex virus encephalitis: Intrathecal synthesis of oligoclonal virus-specific IgG,IgA and IgM antibodies

Summary Paired specimens of serum and CSF from seven patients with acute herpes simplex virus encephalitis were examined during the acute illness or the convalescent stage or during both stages. Imprint immunofixation analyses of viral antibodies separated by agarose electrophoresis and by electrofocusing disclosed intrathecal production of herpes simplex virus IgG antibodies in all seven patients, and of IgA and IgM antibodies in six and three of six patients, respectively. Intrathecal production of herpes simplex virus-specific IgG and IgA was observed in two patients from whom samples were collected after 1 year, while intrathecal production of virus-specific IgM was not demonstrated later than 5 weeks after onset. The intrathecally synthesized IgG and IgM, and to a lesser extent IgA antibodies displayed oligoclonal characteristics. Oligoclonal bands of IgG were observed in the CSF of all patients. Evidence is presented to show that the bulk of the oligoclonal CSF IgG represents herpes simplex virus-specific antibodies. Intrathecally synthesized populations of herpes simplex virus antibodies cross-reacting with varicella-zoster virus were identified in three of the patients.     

Complement activation by necrotic cells in normal plasma environment compares to that by late apoptotic cells and involves predominantly IgM

Necrotic cells are generally considered to stimulate inflammation, whereas apoptotic cells should not. However, apoptotic cells have pro-inflammatory properties since they can activate complement. To what extent this activation compares to that by necrotic cells is not known. We compared complement activation by necrotic cells and apoptotic cells in plasma. Jurkat cells were made apoptotic or necrotic by incubation with etoposide or by heat shock, respectively. Cells incubated in recalcified plasma were tested for C3 and C4 fixation and fluid phase generation of complement activation products. Fixation of C3 and C4 to necrotic cells occurred mainly via the classical pathway, independent from the method of necrosis induction and the cell type. Depletion of IgM from plasma almost completely abrogated complement fixation by necrotic cells, which was restored by supplementation with purified IgM. Complement activation by late apoptotic cells was comparable to that by necrotic cells regarding the extent and dependence on IgM. Moreover, incubation of plasma with necrotic or late apoptotic cells led to the generation of comparable amounts of complement activation products. These results indicate that late apoptotic and necrotic cells employ similar complement activation mechanisms in the plasma environment.     

经阴道和腹腔镜行良性卵巢肿瘤切除术对患者体液免疫功能的影响

目的观察采用经阴道和腹腔镜不同手术方式切除卵巢良性肿瘤时患者体液免疫的影响。方法120例卵巢良性肿瘤患者随机分为经阴道手术组60例和经腹腔镜手术组60例行卵巢良性肿瘤切除，所有患者分别于术前及术后12小时取周围静脉自凝血2ml，用免疫比浊方法测定IgG、IgA、IgM和CRP。结果①经阴道手术组术后IgG、IgA和IgM无明显变化（P〉0．05）；腹腔镜组术后IgG、IgA和IgM明显降低（P〈0．01）；两组阃术后IgG、IgA和IgM比较，差异有显著性（P〈0．01）。②两组术后周围血CRP与术前比较，差异均有显著性（P〈0．01）；组间比较差异亦有显著性（P〈0．01）。结论经阴道手术对患者体液免疫功能几乎没有影响，而腹腔镜手术后患者体液免疫功能受到明显抑制。这两种方式手术后机体血清CRP均明显升高，其中腹腔镜术后血清CRP升高幅度大。     

不同年龄段儿童呼吸道感染肺炎支原体IgM与DNA的相关性研究

目的研究不同年龄段儿童呼吸道感染肺炎支原体IgM与DNA的相关性。方法采用ELISA法检测320例患儿就诊当日和7d后血清标本，用分子信标实时荧光PCR检测患儿咽拭子标本，根据不同年龄段进行对比分析。结果320例患儿MP-DNA阳性率为40％，就诊当日标本MP—IgM阳性率11％，7d后标本阳性率为30％；就诊当日和7d后血清学结果与PCR结果差异有统计学意义（P〈0.01）；7d后血清学结果以1～3岁患儿阳性率最高（42％），与其他组比差异均有统计学意义（P〈0．05）。结论不同年龄段的儿童由于免疫系统发育处于不同阶段，对肺炎支原体的免疫应答可能存在差异。     

异种抗体IgM对培养豚鼠心脏微血管内皮细胞的作用

目的:了解大鼠体内天然抗体IgM在非协调性异种心脏移植超急性排斥反应中的作用。方法:以培养豚鼠心脏微血管内皮细胞为异种心脏移植的细胞实验模型,通过补体结合实验、免疫组化等方法研究大鼠抗体IgM对该细胞的作用,了解异种抗体IgM在异种移植超急性排斥反应中的作用机制。结果:在该模型中,大鼠抗体IgM可与豚鼠心脏微血管内皮细胞结合并能激活补体,产生对该细胞的损伤,而经小鼠抗大鼠IgM处理后的大鼠血清,对豚鼠心脏微血管内皮细胞的损伤作用明显减轻。结论:在该实验模型中,异种天然抗体IgM是激活补体引起超急性排斥反应的重要因素。     

36例IgM肾病的临床及病理分析

目的　探讨成人IgM肾病的临床病理特点及预后。方法　收集本院IgM肾病 3 6例 ,对其临床表现、病理及疗效进行分析。结果　IgM肾病临床表现呈肾病综合征、血尿、血尿伴蛋白尿等多种表现 ,其组织病理和免疫病理分型也呈多样性 ,三者之间无明显相关性。所有病例予激素加免疫抑制剂治疗 ,有效率 96 7%。随访 3～ 89个月 ,未见肾功能异常改变者。结论　IgM肾病临床表现及病理分型呈多样性 ,对激素和免疫抑制剂敏感 ,愈后佳     

唾液、2me处理血清IgM／IgG效果的对比分析

目的：观察不同稀释度的唾液和2me同时处理血清后IgM的效价和IgG的效价,对比分析这两种常用的处理IgM的方法效果的差异。方法：同时取3份唾液（两份A型,一份B型）,检测三份唾液的血型物质效价;检测15例前来就诊的＂O＂型孕妇标本血清中IgM、IgG效价;检测2me及不同稀释度唾液处理后血清中IgM、IgG的效价;综合以上结果进行对比分析。结果：唾液的中和血清中IgM的能力较2me强,但过量的唾液会在中和IgM的同时,也破坏IgG。结论：2me处理IgM确为较经典、较稳妥、较可靠的方法。