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TNF-alpha polymorphisms in chronic beryllium disease and beryllium sensitization
Erin C McCanlies1, Christine R Schuler, Kathleen Kreiss
1Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia 26505, USA. EIM4@CDC/GOV
Journal of Occupational and Environmental Medicine
|April 12, 2007
Summary
This study found no association between specific tumor necrosis factor-alpha (TNF-alpha) gene variants and chronic beryllium disease or sensitization. These findings suggest TNF-alpha alleles are not predictive of beryllium-related health outcomes.
Area of Science:
- Immunogenetics
- Occupational Medicine
- Cytokine Research
Background:
- Tumor necrosis factor-alpha (TNF-alpha) is a key cytokine in immune responses.
- Genetic variations in TNF-alpha have been implicated in various inflammatory conditions.
- Beryllium exposure can lead to chronic beryllium disease (CBD) and sensitization.
Purpose of the Study:
- To investigate the association between two specific TNF-alpha gene variants (TNF-alpha-308*02 and TNF-alpha-238*02) and the risk of developing CBD or beryllium sensitization.
- To determine if TNF-alpha genetic polymorphisms influence susceptibility to beryllium-induced lung disease.
Main Methods:
- Genotyping for TNF-alpha gene variants at positions -308 and -238 was performed.
- A cohort of 886 beryllium-exposed workers was analyzed, including those with CBD, sensitization, and no disease.
- Statistical analysis was used to assess the odds of disease and sensitization in relation to specific TNF-alpha alleles.
Main Results:
- No statistically significant association was found between the TNF-alpha-308*02 or TNF-alpha-238*02 alleles and the odds of developing chronic beryllium disease.
- The presence of at least one of these TNF-alpha alleles, whether homozygous or heterozygous, did not increase the risk for CBD.
- Similarly, neither TNF-alpha allele variant showed a significant association with beryllium sensitization (P>0.05).
Conclusions:
- This study did not find evidence supporting an association between the investigated TNF-alpha gene variants and chronic beryllium disease or sensitization.
- The findings contradict a previous report, suggesting these specific TNF-alpha polymorphisms are not risk factors for beryllium-related health issues.
- Further research may be needed to explore other genetic or environmental factors contributing to beryllium disease susceptibility.
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