Genetic Determinants of Sensitivity to Beryllium in Mice
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2009/06/01
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Personal Author:Gordon T ; Nadas A ; RubinEM ; Sorrentino C ; Tarantino-Hutchison LM ; Tinkle SS ; Weston A ; Zhu YW
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Description:Chronic beryllium disease (CBD), an irreversible, debilitating granulomatous lung disease is caused by exposure to beryllium. This occupational hazard occurs in primary production and machining of Be-metal, BeO, beryllium containing alloys, and other beryllium products. CBD begins as an MHC Class II-restricted, T(H)1 hypersensitivity, and the Human Leukocyte Antigen, HLA-DPB1E(69), is associated with risk of developing CBD. Because inbred strains of mice have not provided good models of CBD to date, three strains of HLA-DPB1 transgenic mice in an FVB/N background were developed; each contains a single allele of HLA-DPB1 that confers a different magnitude of risk for chronic beryllium disease: HLA-DPB1*0401 (OR approximate to 0.2), HLA-DPB1*0201 (OR approximate to 3), and HLA-DPB1*1701 (OR approximate to 46). The mouse ear swelling test ( MEST) was employed to determine if these different alleles would support a hypersensitivity response to beryllium. Mice were first sensitized on the back and subsequently challenged on the ear. In separate experiments, mice were placed into one of three groups (sensitization/challenge): C/C, C/Be, and Be/Be. In the HLA-DPB1*1701 mice, the strain with the highest risk transgene, the Be/Be group was the only group that displayed significant maximum increased ear thickness of 19.6% +/- 3.0% over the baseline measurement (p < 0.05). No significant changes were observed in the other transgenic strains for any treatment condition. In addition, inter-strain differences in response to beryllium in seven inbred strains were investigated through use of the MEST, these included: FVB/N, AKR, Balb/c, C3H/HeJ, C57/BL6, DBA/2, and SJL/J. The FVB/N strain was least responsive, while the SJL/J and C57/BL6 strains were the highest responders. Our results suggest that the HLA-DPB1*1701 transgene product is an important risk factor for induction of the beryllium-sensitive phenotype. This model should be a useful tool for investigating beryllium sensitization. [Description provided by NIOSH]
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ISSN:1547-691X
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Pages in Document:130-135
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Volume:6
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Issue:2
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NIOSHTIC Number:nn:20035787
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Citation:J Immunotoxicol 2009 Jun; 6(2):130-135
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Contact Point Address:Terry Gordon, PhD, NYU School of Medicine, 57 Old Forge Rd., Tuxedo, NY 10987
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Email:terry.gordon@nyumc.org
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Federal Fiscal Year:2009
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Peer Reviewed:True
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Source Full Name:Journal of Immunotoxicology
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Main Document Checksum:urn:sha-512:23bc878857f4cb3bc976fca80bcfae5d4c4d0c2cb63e3a6832b617c1dc54d15713e838dfded05fc54697c85a8d873120b65857c36d8a2558e9f833f9b06ab8a2
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