高血压病患者血清IGFⅡ的变化

目的 :探讨胰岛素样生长因子Ⅱ (IGFⅡ )与高血压病 (EH)以及与高血压伴左室肥厚 (EH伴LVH)的关系。方法 :采用放射免疫分析 10 0例未治疗的EH患者和 5 0例正常人血清IGFⅡ水平。并用彩色多普勒诊断仪测定 10 0例EH患者的左心室重量 (LVM )。结果 :EH患者血清IGFⅡ水平明显高于正常人[(0 6 6± 0 35 )ng/ml:(0 4 4± 0 14 )ng/ml,p <0 0 1],EH伴LVH者IGFⅡ高于EH非LVH者 [(0 82± 0 4 0 )ng/ml:(0 5 4± 0 2 0 )ng/ml,p <0 0 1]。结论 :EH患者IGFⅡ水平升高 ,其升高程度与病情密切相关 ,IGFⅡ可能参与了EH心肌肥厚的形成     

Immunization with Combined HSV-2 Glycoproteins B2:D2 Gene DNAs: Protection against Lethal Intravaginal Challenges in Mice

The immunity of a combined DNA vaccine of HSV-2 glycoproteins B2 (gB2) and D2 (gD2) genes in comparison to individual vaccines was studied with regard to protecting against the HSV infection. Two recombinant DNA vaccines of the pHS2-gB2 or pHS2-gD2 were constructed and formulated. The neutralizing antibody titers appeared higher in the B2:D2 gene cocktail-vaccinated mice than that of the individual B2 or D2 gene-vaccinated group alone, and the positive KOS control induced higher titer of the neutralizing antibody than combined or individual gene vaccines. The mock-immunized mice failed to induce enough. The ranks for the CTL activity and the protection rates against the lethal intravaginal challenge were shown as KOS>B2:D2 cocktail>D2>B2 gene vaccines. The vaginal external diseases in the B2:D2 or D-vaccinated mice were significantly reduced against the challenging dosages. The virus titers in the vaginal secretions of the vaccinated mice significantly reduced with time, and the B2:D2 gene vaccine decreased more than each individual vaccine alone. It can be concluded that the cocktailed vaccines are more effective in the humoral and cellular immune responses in the mice, and in the protection of the mice against the intravaginal challenging dosages when compared with individual gene vaccines. All the DNA vaccines failed to block the latent infection in sensory nerves.     

Mercury (II) alters mitochondrial activity of monocytes at sublethal doses via oxidative stress mechanisms

The perennial controversy about the safety of mercury in dental amalgams has adversely affected the availability and the quality of dental care. Chronic Hg(II) blood concentrations above 300 nM are known to alter function of the nervous system and the kidney. However, the effects of blood concentrations of 10 to 75 nM, far more common in the general population, are not clear and mechanisms of any effects are not known. The monocyte is an important potential target of Hg(II) because of its critical role in directing inflammatory and immune responses. In the current study we tested the hypothesis that concentrations of Hg(II) of 10 to 300 nM alter monocyte activity via a redox-dependent mechanism. Mitochondrial activity was used to establish inhibitory concentrations of Hg(II) following 6 to 72 h of exposures to THP1 human monocytic cells. Then subinhibitory concentrations were applied, and total glutathione levels and reactive oxygen species (ROS) were measured. Antioxidants [N-acetyl cysteine, (NAC); Na2SeO3, (Se)] and a pro-oxidant (tert-butylhydroquinone, tBHQ) were used to support the hypothesis that Hg(II) effects were redox-mediated. After 72 h of exposure, 20 microM of Hg(II) inhibited monocytic mitochondrial activity by 50%. NAC mitigated Hg(II)-induced mitochondrial suppression only at concentrations of greater than 10 microM, but Se had few effects on Hg-induced mitochondrial responses. tBHQ significantly enhanced mitochondrial suppression at higher Hg(II) concentrations. Hg(II) concentrations of 75 and 300 nM (0.075 and 0.30 microM, respectively) significantly increased total glutathione levels, and NAC mitigated these increases. Se plus Hg(II) significantly elevated Hg-induced total cellular glutathione levels. Increased ROS levels were not detected in monocytes exposed to mercury. Hg(II) acts in monocytic cells, at least in part, through redox-mediated mechanisms at concentrations below those commonly associated with chronic mercury toxicity, but commonly occurring in the blood of some dental patients.     

人脐静脉内皮细胞清除补体攻膜复合物的机制

目的：探讨内皮细胞清除补体攻膜复合物（MAC）的途径及其清除动力学，方法：原代培养的人脐静脉内皮细胞以RH414荧光标记质膜双层，0℃组装亚溶剂量的MAC，37℃复苏后，LSCM实时监MAC沉积诱导的质膜囊泡化形成和胞吞，胞吐情况,流式细胞仪定量检测内皮细胞表面MAC抗原的清除情况，结果：MAC沉积后，内皮细胞有的质膜囊泡化形成，囊泡以胞吞和胞吐2种方式离开细胞，并以前者占优，37度条件下，内皮细胞清除表面MAC的半衰期约为5min。结论：内皮细胞可通过胞吞和胞吐2种机制清除细胞表面沉积的MAC，并以胞吞方式为主。     

外固定架治疗桡骨远端粉碎性骨折

目的总结桡骨远端粉碎性骨折的外固定架治疗疗效。方法从1995年～2003年采用外固定架治疗桡骨远端粉碎性骨折46例,并进行随访。结果治疗后均随访1年,术后按Dienst评分,优良率为83．3％。结论外固定架固定牢靠,可早期活动腕关节,是治疗桡骨远端粉碎性、开放性骨折的有效方法。     

Crossed immunoelectrophoretic analysis of anti-Salmonella typhi antibodies in sera of typhoid patients and carriers: demonstration of the presence of typhoid-specific antibodies to a non-O, non-H, non-Vi antigen

A veronal buffer extract of Salmonella typhi was used as the reference antigen and its corresponding rabbit antiserum as the reference antibody in crossed immunoelectrophoresis to analyze antibodies in sera obtained from typhoid patients and carriers. Four precipitating antibodies were regularly detected. Three were against antigens common to other gram-negative bacteria and one appeared to be typhoid specific. Of the three common antigens, one (antigen no. 7) formed a precipitin resembling in mobility and morphology the lipopolysaccharide antigen seen in crossed immunoelectrophoresis analysis of other gram-negative bacteria. The other (antigen no. 19) was heat labile and antigenically similar to the reported common antigen of Pseudomonas aeruginosa. The third (antigen no. 14), also heat labile, was present in members of the family Enterobacteriaceae but not the family Pseudomonas. The typhoid-specific precipitating antibody present in sera of most typhoid patients and carriers but not patients infected with nontyphoid salmonella was directed to a heat-labile, non-O, non-H, and non-Vi antigen (antigen no. 28), probably protein in nature.     

腺病毒载体介导的lacZ基因在NG细胞系及大鼠黑质的表达

本实验用标记基因ｌａｃＺ５型重组腺病毒（Ａｄ５ＣＭＶｌａｃＺ）转染培养的ＮＧ细胞系，Ｘ－ｇａｌ染色检测转染效率．在培养的ＮＧ细胞系，当病毒滴度为２×１０８时，转集率达到５０％，当滴度为２×１０９时，转染率达１００％，有较好的量效关系；固定病毒液度为１０１０，培养２～１６ｈ，细胞的转染率随时间延长而提高，有较好的时效关系。将Ａｄ５ＣＭＶｌａｃＺ注射到大鼠黑质部位后，分别于注射后３～１２０ｄ取脑、切片、Ｘ－ｇａｌ染色，发现黑质局部从第７ｄ开始有部分蓝染，第１０ｄ达高峰，注射局部感染率１００％；９０ｄ时开始下降，持续至１２０ｄ；纹状体等其它部位无蓝染．上述结果提示，腺病毒载体介导的标记基因可在培养的神经细胞系和中脑黑质部位高效表达，为进一步开展中枢神经系统退变性疾病尤其是帕金森氏病的基因治疗奠定基础。     

妊娠高血压患者血浆中降钙素基因相关肽的测定及其临床意义

本文测定了３０例正常育龄妇女，２８例正常妊娠以及３６例妊娠征患者血浆中降钙素基因相关肽的水平，结果发现，轻度妊高生与正常妊娠相比，血浆中ＣＧＲＰＫ是有下降但不显著（Ｐ〉０．０５）。中重度妊高征与正常妊娠相比，差异有非常显著性，因此推测，妊娠状态下血浆中降钙素基因相关肽的减少可能是妊娠高血压症产生的重要原因之一。     

可切削渗透陶瓷玻璃料对不同堆积密度氧化铝基体的渗透

探讨了可切削渗透陶瓷 (Infiltration of Machinable- infiltrated- ceramic,MIC)渗透玻璃在不同堆积密度氧化铝基体中的渗透情况及渗透后复合体的颜色表达。在 110 0℃保温 2 h,将玻璃渗透到不同堆积密度的氧化铝基体中 ,分别测得其渗透深度和颜色参数。扫描电镜观察玻璃—氧化铝复合体断面。玻璃渗透深度的平方与氧化铝堆积密度有直线负相关关系 ,最小渗透深度为 3.0 92 m m。复合体的颜色系数与氧化铝堆积密度无相关性。渗透复合体在断裂过程中可见 :裂纹偏转、晶体拔出和穿晶断裂。本实验证实 MIC渗透玻璃的渗透性能达到临床要求。渗透后的复合体颜色稳定 ,强度可靠