Gene Vaccines[dhelix]

Figure 3. Studies in bone marrow chimeric mice demonstrated that after immunization with plasmid DNA encoding an antigen,
cytolytic T lymphocytes were activated by antigen-presenting cells ( ) that either had been directly transfected by the DNA
or had received antigen via cross-priming, in which a non–antigen-presenting cell initially produces the protein encoded by
the DNA vaccine, then transfers the antigen in some form to a professional antigen-presenting cell for generation of MHC class
I restricted cytolytic T cells. Production of the protein antigen in non–antigen-presenting cells, such as myocytes, cannot
result in direct stimulation of cytolytic T cells .
Mechanism of antigen presentation for generation of cytolytic T cells after DNA vaccination.APC(3)
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Ann Intern Med
April 1, 2003
vol. 138
no. 7
550-559