华东部分地区12岁以下儿童5型腺病毒感染状况调查

Investigation for the adenovirus type 5 immunity in children population under the age of 12 in the eastern part of China

目的调查12岁以下儿童腺病毒（adenovirus，Ad）感染所诱发的免疫力状况，尤其是针对5．型腺病毒（Ad5）的免疫力状况，旨在筛选应用Ad5重组疫苗和基因治疗剂的适宜人群。方法通过采集华东部分省市和地区12岁以下儿童的血清标本，采用ELISA方法检测Ad非特异性总抗体（Ad Total antibody，Ad-TAb），用蚀斑减少中和试验（Plague Reduction Neutralization Test，PRNT）来检测Ad5中和抗体（Ad5 neutralizing antibody，Ad5-NAb），用Stata9．0软件进行数据分析。结果经过ELISA和PRNT检测，发现Ad-TAb和Ad5-NAb的滴度水平以及各组标本的阳性率，均随着年龄的增长而呈上升的趋势。以低于2岁的年龄组各项数据最低，与其它各组有显著性差异（P〈0．05）.结论在12岁以下儿童人群中，以低于2岁的年龄组应用Ad5型重组疫苗或基因治疗剂是可行的。

Objective To investigate the adenovirus （Ad） infection-induced immunity in the children who are below 12 years old, especially for the immunity against adenovirus serotype 5 （Ad5）. Methods Serum samples were collected from children under the age of 12 in the eastern regions of China, and screened by using ELISA for total antibodies of adenovirus （Ad-Tab）, and Ad5 neutralizing antibodies （Ad5-NAb） were determined by using the plaque reduction neutralization test （PRNT）. Stata 9.0 software was used for data analysis. Results After ELISA and PRNT assay, the titer levels of Ad-TAb and AdS-NAb, and positive rates of each group of specimens are increased with ages. The data of below 2-year-old age group is the lowest among these four groups after statistical analysis. Conclusions In this study, we observed that younger than 2-year-old age is suitable for application of Ad5-based recombinant vaccine or gene therapeutic agents.