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Virologica Sinica, 26 (4) : 260-266, 2011
Characterization and Diagnostic Use of a Monoclonal Antibody for VP28 Envelope Protein of White Spot Syndrome Virus*
Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Feed Science Institute, Zhejiang University, Hangzhou 310029, China
2. Zhejiang Provincial Center for Disease Prevention and control, Hangzhou 310029, China
 Correspondence: huahuadu@zju.edu.cn
The gene encoding the VP28 envelope protein of White spot syndrome virus (WSSV) was cloned into expression vector pET-30a and transformed into the Escherichia coli strain BL21. After induction, the recombinant VP28 (rVP28) protein was purified and then used to immunize Balb/c mice for monoclonal antibody (MAb) production. It was observed by immuno-electron microscopy the MAbs specific to rVP28 could recognize native VP28 target epitopes of WSSV and dot-blot analysis was used to detect natural WSSV infection. Competitive PCR showed that the viral level was approximately 104 copies/mg tissue in the dilution of gill homogenate of WSSV-infected crayfish at the detection limit of dot-blot assay. Our results suggest that dot-blot analysis with anti-rVP28 MAb could rapidly and sensitively detect WSSV at the early stages of WSSV infection.
  Published online: 5 Aug 2011
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