Abstract:
:Virus-like particles are a highly effective type of subunit vaccine that mimics the overall structure of virus particles without containing infectious genetic material. In this work, a particulate form of the recombinant capsid protein from dengue-2 was evaluated in mice to determine the level of protection against viral challenge and to measure the antigen-induced cell-mediated immunity (CMI). The nucleocapsid-like particles (NLPs) adjuvanted with alum did not induce antiviral antibodies. However, splenocytes from the immunized animals secreted high levels of IFN-gamma upon virus stimulation, and a significant protection rate was achieved after challenge with lethal dengue-2 virus. Finally, both IFN-gamma secretion and protection against viral encephalitis were demonstrated to be dependent on CD4(+) and CD8(+) cells. This study provides new evidences regarding the protective role of the CMI in the mouse model without the induction of neutralizing antibodies. Further studies in non-human primates or humanized mice should be carried out to elucidate the usefulness of the NLPs as a potential vaccine candidate against dengue disease.
journal_name
Int Immunoljournal_title
International immunologyauthors
Gil L,López C,Lazo L,Valdés I,Marcos E,Alonso R,Gambe A,Martín J,Romero Y,Guzmán MG,Guillén G,Hermida Ldoi
10.1093/intimm/dxp082subject
Has Abstractpub_date
2009-10-01 00:00:00pages
1175-83issue
10eissn
0953-8178issn
1460-2377pii
dxp082journal_volume
21pub_type
杂志文章abstract::In vaccine development, a major objective is to induce strong, specific T cell responses. This might be obtained by targeting antigen to cell surface molecules that efficiently channel the antigen into endocytic compartments for loading of MHC molecules. Antibodies have been used to deliver antigen; however, it is imp...
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