The factors influencing the evolution of human immunodeficiency virus (HIV) infection are not fully known, but the host genotype undoubtedly plays a role in determining the outcome of the disease by affecting the immune response to HIV. The role of the host human leukocyte antigen (HLA) genotype in the regulation of susceptibility to HIV infection and expression has been studied extensively in different major risk groups. Certain HLA alleles and haplotypes, being associated with aberrant immune responses independently from HIV infection, have been reported to facilitate the rapid progression of disorders related to HIV infection. Particularly, the association of rapid acquired immunodeficiency syndrome (AIDS) progression with genes from the HLA-B8,DR3 haplotype has been reported by different research groups. It is well known that this haplotype is associated in all Caucasian populations with a wide variety of diseases with autoimmune features and in healthy subjects with a number of immune system dysfunctions, as a reduced production of T helper (Th)1 type cytokine. HIV infection may act on this genetic background triggering immunopathogenetic mechanisms leading to AIDS with a dominant Th2 profile as a common feature.

Keywords:
AIDS, HLA-B8,DR3, Th1 cells, Th2 cells, Cytokines, type 1, Cytokines, type 2
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1998
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