Ultrastructural pathological changes in the gut-associated lymphoid tissues of sacculus rotundus (SR) of rabbits infected with rabbit haemorrhagic disease virus (RHDV) were first observed. There were numerous holes at...Ultrastructural pathological changes in the gut-associated lymphoid tissues of sacculus rotundus (SR) of rabbits infected with rabbit haemorrhagic disease virus (RHDV) were first observed. There were numerous holes at the luminal and basement membrane surfaces of the dome epithelium (DE), consistently accompanied by necrosis of lymphocytes and M-cells, and pronounced depletion of lymphocytes in the domes and follicles, decrease of DE complex with formation of pseudomembranous structure on the surface of the dome epithelium. A specific finding in lymphocytes and macrophages was that severe destruction detraction of the membrane of rough endoplasmic reticulum(RER) was accompanied by conspicious increase of solitary, ribo-some-like particles in the cytoplasm, with appearances of intranuclear particles and intranuclear inclusions. It was found that there were many round and dense virion-like particles, with 26 nm in diameter, in the nuclei and cytoplasm of lymphoctes, plasma cells, macrophages and fibroblasts, or in degenerated cells and cellular debris. At the same time, another round virion-like particles about 34 nm in diameter were also seen in the cytoplasm of some cells and interstitium. The results indicated that the appearances of the ribosome-like particles, virion-like particles and inclusion bodies were related to the replication and assembly of RHDV. The present observations suggested that DE of sacculus rotundus could be a open pathway and a transporting route for the entry of antigens into hosts. While the antigen is profoundly deleterious, DE may be as a closed portal or a barrier preventing the foreign antigenic materials from invading.展开更多
[ Objective] To investigate the immunogenicity of main antigen epitope of RHDV （ Rabbit haemorrhagic disease virus） VP60 expressed in a prokaryotic system. [ Method] The major antigen epitope gene of RHDV VP60 was a...[ Objective] To investigate the immunogenicity of main antigen epitope of RHDV （ Rabbit haemorrhagic disease virus） VP60 expressed in a prokaryotic system. [ Method] The major antigen epitope gene of RHDV VP60 was amplified by RT-PCR. It was cloned into pET-28b （ ＋ ） and expressed in E. coli Rosetta strain. The recombinant protein was detected by Western blot. The pudfied recombinant protein was used to immunize rabbits in order to observe its immunogenicity. [ Result] Western blot analysis revealed a clear band at approximately 24.0 kDa. The purified recom- binant protein reacted with the purified RHDV in ELISA. [ Conclusion] The prokaryotically expressed main antigen epitope of RHDV VP60 shows good immunogenicity.展开更多
基金This work was supported by the National Natural Science Foundation of China(39200092,39870584).
文摘Ultrastructural pathological changes in the gut-associated lymphoid tissues of sacculus rotundus (SR) of rabbits infected with rabbit haemorrhagic disease virus (RHDV) were first observed. There were numerous holes at the luminal and basement membrane surfaces of the dome epithelium (DE), consistently accompanied by necrosis of lymphocytes and M-cells, and pronounced depletion of lymphocytes in the domes and follicles, decrease of DE complex with formation of pseudomembranous structure on the surface of the dome epithelium. A specific finding in lymphocytes and macrophages was that severe destruction detraction of the membrane of rough endoplasmic reticulum(RER) was accompanied by conspicious increase of solitary, ribo-some-like particles in the cytoplasm, with appearances of intranuclear particles and intranuclear inclusions. It was found that there were many round and dense virion-like particles, with 26 nm in diameter, in the nuclei and cytoplasm of lymphoctes, plasma cells, macrophages and fibroblasts, or in degenerated cells and cellular debris. At the same time, another round virion-like particles about 34 nm in diameter were also seen in the cytoplasm of some cells and interstitium. The results indicated that the appearances of the ribosome-like particles, virion-like particles and inclusion bodies were related to the replication and assembly of RHDV. The present observations suggested that DE of sacculus rotundus could be a open pathway and a transporting route for the entry of antigens into hosts. While the antigen is profoundly deleterious, DE may be as a closed portal or a barrier preventing the foreign antigenic materials from invading.
文摘[ Objective] To investigate the immunogenicity of main antigen epitope of RHDV （ Rabbit haemorrhagic disease virus） VP60 expressed in a prokaryotic system. [ Method] The major antigen epitope gene of RHDV VP60 was amplified by RT-PCR. It was cloned into pET-28b （ ＋ ） and expressed in E. coli Rosetta strain. The recombinant protein was detected by Western blot. The pudfied recombinant protein was used to immunize rabbits in order to observe its immunogenicity. [ Result] Western blot analysis revealed a clear band at approximately 24.0 kDa. The purified recom- binant protein reacted with the purified RHDV in ELISA. [ Conclusion] The prokaryotically expressed main antigen epitope of RHDV VP60 shows good immunogenicity.
