DNA immunization, although attractive, is poor for inducing mucosal immunity, thus limiting its protective value against most infectious agents. To surmount this shortcoming, we devised a method for mucosal transgene vaccination by using an M cell ligand to direct the DNA vaccine to mucosal inductive tissues and the respiratory epithelium. This ligand, reovirus protein final sigma1, when conjug...

La vacunación con DNA es una nueva y prometedora estrategia para la prevención y el tratamiento de muchas enfermedades debido a su habilidad para inducir una respuesta inmunitaria tanto humoral como celular, frente al antígeno codificado por el DNA recombinante. Una vez inoculado en el huésped, el DNA se introduce en las células, donde el antígeno se expresa y se procesa para ser después recono...

OBJECTIVES Antigen-induced activation and proliferation of HIV-1-infected cells is hypothesized to be a mechanism of HIV persistence during antiretroviral therapy. The objective of this study was to determine if proliferation of H1N1-specific HIV-infected cells could be detected following H1N1 vaccination. METHODS This study utilized cryopreserved PBMC from a previously conducted trial of H1N...

Although DNA vaccines have been shown to elicit potent immune responses in animal models, initial clinical trials in humans have been disappointing, highlighting a need to optimize their immunogenicity. Naked DNA vaccines are usually administered either i.m. or intradermally. The current study shows that immunization with naked DNA by direct injection into a peripheral lymph node enhances immun...

TIE2 positive cels play a crucial role in processes that are potentialy involved in atherosclerosis, such as angiogenesis. Therefore, the specific deletion of TIE2 positive cels by means of DNA vaccination may affect atherosclerosis. Celular immunity against cels that overexpress TIE2 was established in LDLr -/mice by a novel oral DNA vaccination technique, in which an attenuated Salmonella typ...

We explore here if vaccination with DNA encoding an autoantigenic peptide can suppress autoimmune disease. For this purpose we used experimental autoimmune encephalomyelitis (EAE), which is an autoaggressive disease in the central nervous system and an animal model for multiple sclerosis. Lewis rats were vaccinated with DNA encoding an encephalitogenic T cell epitope, guinea pig myelin basic pr...

C57BL/6, C3H, and BALB/c mice were vaccinated with plasmids encoding Toxoplasma gondii antigens GRA1, GRA7, and ROP2, previously described as strong inducers of immunity. Seroconversion for the relevant antigen was obtained in the majority of the animals. T. gondii lysate stimulated specific T-cell proliferation and secretion of gamma interferon (IFN-gamma) in spleen cell cultures from vaccinat...

Using culture filtrate Ag-specific mAbs generated from mycobacteria-infected H-2b haplotype mice, we have previously identified three genes in the Mycobacterium tuberculosis genome, encoding proteins homologous to the periplasmic ATP-binding cassette phosphate-binding receptor PstS of the phosphate-specific transport system of E. coli. To define the potential vaccinal properties of these phosph...