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TNF-α gene polymorphisms and expression.

Radwa R El-Tahan1, Ahmed M Ghoneim1, Noha El-Mashad2

  • 1Zoology Department, Faculty of Science, Damietta University, P.O. 34517, New Damietta, Damietta Egypt.

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|September 22, 2016
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Summary

Tumor necrosis factor alpha (TNF-α) gene polymorphisms, particularly the -308G/A variant, are linked to autoimmune diseases. Discrepancies in findings may stem from ethnic differences and interacting molecules affecting TNF-α expression.

Keywords:
Autoimmune diseasesExpressionPolymorphismsTNF-α

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Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Human Genetics

Background:

  • Tumor necrosis factor alpha (TNF-α) is a key proinflammatory cytokine implicated in disease pathogenesis.
  • TNF-α gene polymorphisms, especially in the promoter region, can influence disease susceptibility and severity.
  • Genetic variations in TNF-α and its receptors are investigated for links to autoimmune diseases.

Purpose of the Study:

  • To review the association between TNF-α gene and receptor polymorphisms and the development of autoimmune diseases.
  • To highlight the role of the -308G/A TNF-α promoter polymorphism in autoimmune conditions.
  • To discuss factors contributing to discrepancies in research findings.

Main Methods:

  • Literature review of studies investigating TNF-α gene and receptor polymorphisms.
  • Analysis of associations between specific polymorphisms (e.g., -308G/A) and autoimmune diseases.
  • Examination of data on molecules regulating TNF-α expression.

Main Results:

  • The -308G/A TNF-α promoter polymorphism shows a recurring association with autoimmune diseases, though results vary.
  • Other TNF-α gene polymorphisms have demonstrated minimal or no significant association with autoimmune diseases.
  • Factors like ethnic origin, sample size, and interacting molecular elements may explain result discrepancies.

Conclusions:

  • The TNF-α -308G/A polymorphism is a significant genetic factor in autoimmune disease development.
  • Variability in study populations and regulatory mechanisms complicates definitive conclusions.
  • Further research is needed to clarify the precise role of TNF-α genetics in autoimmunity.