献血者中SEN病毒部分基因的克隆和序列分析

Isolation of SEN virus and sequence analysis of partial gene in sera from blood donors

目的 了解我国献血者中是否存在SEN病毒 (SENV)感染 ,并分析SENV国内分离株的部分基因序列。方法 根据SENVORF1区保守序列设计引物 ,采用套式PCR方法 ,从献血者血浆标本中分离SENV基因片段 ,对分离的DNA片段进行基因重组和核苷酸序列分析。结果 从 32 9名献血者中分离出 6株SENV基因片段 ,其核苷酸推导氨基酸序列与SENVA～H基因型序列比较 ,同源性在 5 2 %～ 10 0 % ;系统进化树分析发现 ,分离的 6株SENV属SENV H基因型。结论 国内献血者中存在SENV H基因型感染 ,输血可能成为传播SENV途径之一。

Objective To identify SEN virus and analyse the sequence of its partial gene in blood donors in China.Methods Two pair primers from ORF1 of SENV genome were designed and samples from blood donors were detected for SENV DNA by nested PCR.The isolates from blood donors were cloned and sequenced.Results 6 isolates were obtained in 329 sera from blood donors.The sequence analysis showed that there were about 52%～100% homology of deduced amino acid between SENV A～H genotypes and 6 isolates from blood donors. The Phylogenetic tree analysis showed that 6 SENV isolates from blood donors belong to SENVH genotype.Conclusion There exists SENVH genotype infection among blood donors in China. SENV may be transmitted through blood transfusion.