Related Experiment Videos
Tumour necrosis factor microsatellites show association with multiple sclerosis
C W Kirk1, A G Droogan, S A Hawkins
1Northern Ireland Genetics Service, Belfast City Hospital Trust, Northern Ireland, UK.
Journal of the Neurological Sciences
|March 20, 1997
Summary
Genetic variations in Tumor Necrosis Factor (TNF) genes are linked to multiple sclerosis (MS) susceptibility. Specific TNF alpha and beta alleles show a significant association with MS in a Northern Irish population.
Area of Science:
- Immunogenetics
- Neuroimmunology
- Human Genetics
Background:
- Tumor Necrosis Factor (TNF) alpha and beta genes are located within the HLA complex.
- These genes have been implicated in the pathogenesis of multiple sclerosis (MS).
Purpose of the Study:
- To investigate the association between microsatellite markers within the TNF gene region and MS susceptibility.
- To identify specific TNF alleles or haplotypes contributing to MS risk.
Main Methods:
- Allelic association analysis using four microsatellite markers around the TNF genes.
- Study conducted on DNA samples from 189 MS patients and 206 controls of Northern Irish origin.
- Transmission disequilibrium testing (TDT) was employed.
Main Results:
- Significant differences in allele distributions for TNF alpha (TNFa) and TNF beta (TNFb) markers between MS patients and controls (P = 0.014 and P = 0.0019, respectively).
- Increased frequency of TNFa 118 bp and TNFb 127 bp alleles observed in MS patients.
- A conserved MS-associated haplotype (130:118:127 TNF d:a:b) was identified, potentially independent of DR2 inheritance.
Conclusions:
- The study suggests that TNF gene variations are associated with multiple sclerosis susceptibility in the studied population.
- Specific TNF alleles and haplotypes may represent genetic factors contributing to MS risk.
- Further research is warranted to elucidate the precise role of TNF in MS pathogenesis.