T cell recognition of beryllium.

T cell recognition of beryllium.
Curr Opin Immunol. 2013 Aug 23;
Authors: Dai S, Falta MT, Bowerman NA, McKee AS, Fontenot AP
Abstract
Chronic beryllium disease (CBD) is a granulomatous lung disorder caused by a hypersensitivity to beryllium and characterized by the accumulation of beryllium-specific CD4(+) T cells in the lung. Genetic susceptibility to beryllium-induced disease is strongly associated with HLA-DP alleles possessing a glutamic acid at the 69th position of the β-chain (βGlu69). The structure of HLA-DP2, the most prevalent βGlu69-containing molecule, revealed a unique solvent-exposed acidic pocket that includes βGlu69 and represents the putative beryllium-binding site. The delineation of mimotopes and endogenous self-peptides that complete the αβTCR ligand for beryllium-specific CD4(+) T cells suggests a unique role of these peptides in metal ion coordination and the generation of altered self-peptides, blurring the distinction between hypersensitivity and autoimmunity.
PMID: 23978481 [PubMed - as supplied by publisher]

Source: Current Opinion in Immunology - August 23, 2013 Category: Allergy & Immunology Authors: Dai S, Falta MT, Bowerman NA, McKee AS, Fontenot AP Tags: Curr Opin Immunol Source Type: research