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Abstract
In this review we discuss recent developments in the process of production of the disease, through the analysis of recently described pathogenic mechanisms. Lymphocyte (T, CD4+) subpopulations, TH I and TH2 are associated with the production of interleuquins, some of them newly described are related with two phases in the progression of the infection: "protection" and "progression". Based on tbis information, newly designed therapeutic approaches have being deviced, base on the possibility of using IL-12 as a therapeutic drug. The first Phase I clinical trials have recently started. Also the possibility of keeping high levels of IL- 12 as a response to inmunogens has been planned as a new possibility of developing a vaccine. This idea can be further developed with the use of small amounts of antigen or through the use of nacked DNA.
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