梅毒螺旋体抗体在诊断新生儿梅毒中的应用和讨论

目的:探讨梅毒螺旋体(treponema pallidum,TP)抗体在诊断新生儿梅毒中的应用。方法:分别用甲苯胺红不加热血清试验(TRUST)、TP-ELISA和密螺旋体颗粒凝集实验(TPPA)法对84例确诊新生儿梅毒患者与100例健康新生儿血清进行检测。结果:三种检测梅毒螺旋体抗体方法的灵敏度分别为51.2%、98.8%和100%,相对而言,TRUST法不适合作为诊断新生儿梅毒的初筛试验。结论:TP-ELISA法灵敏度与特异性相对较高,操作简便易行,建议作为诊断新生儿梅毒的初筛试验;TPPA法由于操作繁琐复杂,可结合临床作为新生儿梅毒的确诊试验。

Eukaryotic expression of outer membrane protein Gpd from Treponema pallidum and preliminary studies on its immune response in rabbits

The Gpd gene was amplified from the genomic DNA of Treponema the appropriate site of pcDNA3.1 （ ＋ ） vector. The expression of pcDNA3. I was tested with Western blotting and technology of immunoeytochemisty. New munized with the eukaryotic expression recombinant pcDNA3, 1 （ ＋ ）-Gpd pallidum and cloned into （ ＋ ）-Gpd in Hel,a cells Zealand rabbits were imA fusion protein of C, pd with 4.1 kDa has been effectively expressed in HeLa cells, which were detected bv Western blotting and the immunocytochemistry techniques. The New Zealand rabbits were able to elicit the specific antibody after immunization with the nucleic acid vaccine. The antibody titer could reach as high as 1 ： 1024 after 2 weeks of the third injection; and the splenocytes proliferated evidently due to the Gpd protein stimulation. Both the antibody titer and the splenocytes proliferation were higher substantially than those of controls （ P 〈 0.01 ）. All above data will contribute to an experimental basis of further study of the biological function of Gpd protein as well as DNA vaccine for syphilis.

梅毒脂质抗体自动化仪试剂的制备

目的：评价全自动生化分析仪试剂的初步研制方法。方法改进梅毒脂质抗体检验试剂为可在全自动生化分析仪上进行自动分析的试剂，并与手工法结果进行比较。结果自制定量试剂灵敏度在1 R.U.时反应吸光度差值＞80 mAbs，线性可达8 R.U.，批内重复性＜4.5％，批间＜16％。回收88.4％～109.8％之间。与手工法的符合程度88.68％。结论自制的梅毒脂质体抗体定量试剂临床使用检测速度快、标本用量少、结果重现性好，但其诊断的灵敏度与特异度有待进一步评价。