Chumphol Boonsanongchokying. Development of monoclonal antibodies to polyhedrin of monodon baculovirus. Master's Degree(Biotechnology). Mahidol University. : Mahidol University, 2009-07-03.
Development of monoclonal antibodies to polyhedrin of monodon baculovirus
Abstract:
Monodon baculovirus (MBV) is one member of the nucleopolyhedrosis virus
(NPV) group that produces occlusion bodies that contain virions in epithelial cells
of the hepatopancreas of the peinaeid shrimp Penaeus monodon. The major
constituent protein of occlusion bodies is polyhedrin. Polyhedrin protein of MBV
was extracted from infected hepatopancreas of P. monodon post larvae using
Urografin gradient ultracentrifugation. A fraction at 50% Urografin was examined
by electronmicroscopy that contained purified-polyhedrin protein particles of 20-23
nm diameters. This fraction was also analyzed by SDS-PAGE and yielded a single
band of purified-polyhedrin at a molecular weight of 58 kDa. Therefore, purified
polyhedrin was used to produce monoclonal antibodies in order to provide an
immunological tool for detection of the virus. Seventeen monoclonal antibodies
were obtained and reacted with 58 kDa purified-polyhedrin MBV. All of the
monoclonal antibodies were specific to MBV without cross-reactivity to other
viruses (HPV, YHV, and WSSV) based on immunohistochemistry. The antibodies
could be used to detect purified-polyhedrin with high sensitivity up to 0.2 μg/ml by
dot blot assay. Moreover, antibodies could be used to detect MBV infection in tissue
by immunohistochemistry. Therefore, this study provides an immunological tool for
specific detection of MBV in infected shrimp. Further development of highly
sensitive assays and convenient kits using these monoclonal antibodies for detection
of MBV are in progress.