PUBLICAÇÕES científicas

Vaccination against hepatitis C virus with dendritic cells transduced with an adenovirus encoding NS3 protein

Zabaleta A, Llopiz D, Arribillaga L, Silva L, Riezu-Boj JI, Lasarte JJ, Borrás-Cuesta F, Prieto J, Sarobe P.
Division of Hepatology and Gene Therapy, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain.

Revisão:Molecular Therapy

Data: 1/Jan/2008

Hepatologia

Chronic infection by hepatitis C virus (HCV) is characterized by the absence of efficient antiviral T-cell responses.

Thus, vaccination strategies to induce strong anti-HCV T-cell responses are of paramount importance for prophylactic and therapeutic purposes. Dendritic cells (DCs) are the most potent antigen presenting cells; therefore, immunization with these cells loaded with viral antigens offers a new approach for induction of antiviral immunity. Here we show that immunization with DCs transfected with an adenovirus encoding non-structural 3 protein, from HCV (AdNS3), induced multiepitopic CD4 T helper cell 1 (Th1) and CD8 T-cell responses in different mouse strains. These responses prevented the growth of a tumorexpressing HCV proteins, in short- and long-term experiments.

Moreover, immunization with AdNS3-transfected DCs did not induce anti-adenoviral antibodies, as compared to direct immunization with AdNS3, but elicited T-cell responses even in the presence of pre-existing anti-adenoviral antibodies. Finally, responses induced by this protocol down-regulated the expression of HCV RNA in the liver.

In conclusion, DCs transfected with AdNS3 may prove to be an efficient anti-HCV vaccine.

CITAÇÃO DO ARTIGO  Mol Ther. 2008 Jan;16(1):210-7

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