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Frontiers of Medicine

ISSN 2095-0217

ISSN 2095-0225(Online)

CN 11-5983/R

Postal Subscription Code 80-967

2018 Impact Factor: 1.847

Front. Med.    2008, Vol. 2 Issue (1) : 95-99     DOI: 10.1007/s11684-008-0017-y
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Heterologous expression of signal protein 14-3-3 in and the subsequent immune response in mice
ZHENG Meijuan1, SHEN Jilong2, LUO Qingli2, XU Yuanhong3
1.Department of Laboratory Medicine, Second Affiliated Hospital of Anhui Medical University; 2.The Key Laboratory of Gene Resource Utilization for Severe Diseases, Ministry of Education (Anhui Medical University), and Anhui Key Laboratory of Zoonoses (Anhui Medical University); 3.Department of Laboratory Medicine, First Affiliated Hospital of Anhui Medical University;
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Abstract  Schistosomiasis japonica, a zoonosis caused by Schistosoma japonicum, is endemic to the Philippines and China. Several vaccine candidates have been identified and tested in different animal models, but it is still unclear which will be optimal for testing in the field. Therefore, new antigens and strategies are necessary for vaccine development against schistosomiasis japonica. The Sj14-3-3 gene was amplified and subcloned into the expression vector pPICZ?-B and transformed into P. pastoris X-33 by electroporation. Three transformants were induced with methanol. The cultural supernatant was collected and tested by SDS-PAGE and Western blotting. The protein of rSj14-3-3 was prepared and purified and BALB/c mice were immunized which was followed by a challenging infection. The immuno-protection was then evaluated. The Sj14-3-3 gene was expressed and secreted into the medium and its molecular weight was about 35000 as determined by SDS-PAGE. Western blotting showed that the protein had a high specificity against mouse-anti-Sj14-3-3 monoclonal antibody and rSj14-3-3 had a promising immune reactivity. The results of the immuno-protective experiments revealed that the worm reduction was 26.0%, 32.2%, and 36.8%, respectively. The number of eggs in liver tissue was reduced by 36.8%, 43.2%, and 46.1%, respectively. The recombinant Sj14-3-3 of eukaryotic expression in Pichia pastoris was successfully harvested. The molecular vaccine of Sj14-3-3 could partially induce resistance to the infection with S. japonicum in BALB/c mice. The recombinant protein Sj14-3-3 has promising immunological potentials for further approach to the diagnosis and development of molecular vaccine.
Issue Date: 05 March 2008
URL:  
http://academic.hep.com.cn/fmd/EN/10.1007/s11684-008-0017-y     OR     http://academic.hep.com.cn/fmd/EN/Y2008/V2/I1/95
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