Khadijah Siti, Neo Soek Ying, Hossain M S, Miller Lance D, Mathavan S, Kwang Jimmy
Animal Health Biotechnology, Temasek Life Sciences Laboratory, 1 Research Link, The National University of Singapore, Singapore 117604.
J Virol. 2003 Sep;77(18):10162-7. doi: 10.1128/jvi.77.18.10162-10167.2003.
To investigate whether specific-pathogen-free (SPF) shrimps are asymptomatic carriers of white spot syndrome virus (WSSV), we used a WSSV-specific DNA microarray to measure WSSV gene expression in SPF and WSSV-infected shrimps. Three WSSV genes were found to be relatively highly expressed in SPF shrimps. Reverse transcription-PCR using nested primers as well as real-time detection confirmed that these genes have no detectable counterparts in GenBank; structural analysis of the putative proteins revealed helix-loop-helix and leucine zipper motifs. Viral sequences could be PCR amplified from genomic DNA of SPF shrimp, further supporting the suggestion that these shrimps are asymptomatic carriers.
为了研究无特定病原体(SPF)虾是否为白斑综合征病毒(WSSV)的无症状携带者,我们使用了一种WSSV特异性DNA微阵列来测量SPF虾和感染WSSV的虾中WSSV基因的表达。我们发现有三个WSSV基因在SPF虾中相对高表达。使用巢式引物的逆转录PCR以及实时检测证实,这些基因在GenBank中没有可检测到的对应序列;对推定蛋白质的结构分析揭示了螺旋-环-螺旋和亮氨酸拉链基序。病毒序列可从SPF虾的基因组DNA中通过PCR扩增得到,这进一步支持了这些虾是无症状携带者的观点。