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  • Title: 5-azacytidine treatment induces autoimmune vitiligo in parental control strains of the Smyth line chicken model for autoimmune vitiligo.
    Author: Sreekumar GP, Erf GF, Smyth JR.
    Journal: Clin Immunol Immunopathol; 1996 Nov; 81(2):136-44. PubMed ID: 8906744.
    Abstract:
    The effect of 5-Azacytidine (5-AzaC) on melanization was examined in two sublines of the Smyth line (SL) chicken model for autoimmune vitiligo, in two MHC-matched vitiligo-susceptible but normally pigmented controls (BL), and in nonsusceptible controls (LBL). 5-AzaC was administered ip every 3 days from day of hatch to 18 weeks at levels of 1 or 3 mg/kg body wt. Both treatments increased (P < 0.01) the incidence of autoimmune vitiligo in BL controls. In contrast, treatment significantly depressed (P < 0.01) the expected high incidence of vitiligo in one SL subline, but not in the other. There were no apparent pigmentation changes in 5-AzaC-treated LBL controls. 5-AzaC had dose-dependent depressing effects (P < 0.01) on body and lymphoid organ weights. Histological and mitogen assay data suggest negative effects on lymphocyte number and function. The data show that 5-AzaC can initiate autoimmune disease in genetically susceptible but phenotypically normal individuals.
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