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  • Title: The sentinel role of CD8 T cells in regulating CD4 T cell responses to proinsulin in beta-islet cell autoimmunity.
    Author: Batarelo V, Durinovic-Belló I.
    Journal: Ann N Y Acad Sci; 2008 Dec; 1150():270-2. PubMed ID: 19120311.
    Abstract:
    Circulating CD4 T cells specific for peptide epitopes of proinsulin and other autoantigens are markers of autoimmune beta cell destruction in type 1 diabetes, while the role of CD8 T cells is still largely unknown. Here we show that CD8 T cells of a diabetic patient--after rechallange with proinsulin peptides--secrete IFNgamma and granzyme B, markers of their effector capacity. On the other hand, CD8 T cells of the same patient in a "cross-talk" with proinsulin-specific CD4 T cells suppress their proliferation. If confirmed in larger numbers of subjects with beta-islet cell autoimmunity, these results may help us to understand the role of CD8 cells in disease progression and extend our knowledge of disease pathogenesis.
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