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Related Experiment Videos

A highly polymorphic CA repeat marker at the human tumor necrosis factor alpha (TNFA alpha) locus

K Tsukamoto1, N Ohta, Y Shirai

  • 1Department of Molecular Biology, Nippon Medical School, Kawasaki, Japan.

Journal of Human Genetics
|December 16, 1998
PubMed
Summary

Researchers identified a highly variable (CA) dinucleotide repeat in the Tumor Necrosis Factor alpha (TNF alpha) gene. This genetic marker is valuable for studying immune response and cell differentiation disorders.

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Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Genomics

Background:

  • Tumor necrosis factor alpha (TNF alpha), produced by activated monocytes, exhibits cytotoxic effects and diverse biological functions.
  • Genetic variations can influence immune responses and cellular processes.

Purpose of the Study:

  • To identify and characterize polymorphic markers within the gene for TNF alpha.
  • To assess the utility of identified polymorphisms for genetic studies.

Main Methods:

  • Isolation of a genomic clone containing the TNF alpha gene.
  • Analysis of a dinucleotide (CA) repeat sequence within the gene for polymorphism.
  • Calculation of heterozygosity for the identified polymorphism.

Main Results:

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  • A polymorphic dinucleotide (CA) repeat sequence was successfully isolated from the TNF alpha gene locus at 6p21.3.
  • The identified polymorphism exhibited high heterozygosity, with a value of 0.80.

Conclusions:

  • The polymorphic (CA) repeat in the TNF alpha gene serves as a valuable genetic marker.
  • This marker can be effectively utilized in the genetic investigation of diseases related to immune response and cell differentiation.