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Interleukin 18 (IL-18) gene polymorphisms at position -137 may increase the risk of developing multiple sclerosis (MS). This finding suggests a potential genetic link for MS in the Turkish population.

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Area of Science:

  • Immunogenetics
  • Neuroimmunology
  • Human Genetics

Background:

  • Proinflammatory cytokines, such as Interleukin 18 (IL-18), are implicated in the pathogenesis of multiple sclerosis (MS).
  • IL-18, an innate cytokine produced by macrophages, is crucial in early inflammatory responses.
  • Understanding the genetic underpinnings of MS is vital for developing targeted therapies.

Purpose of the Study:

  • To investigate the association between Interleukin 18 (IL-18) gene polymorphisms and the risk of developing multiple sclerosis (MS).
  • To determine if specific IL18 genotypes or haplotypes correlate with MS susceptibility in the Turkish population.

Main Methods:

  • Genotyping of IL18 gene polymorphisms was conducted using the PCR-restriction fragment length polymorphism (PCR-RFLP) method.
  • The study included 101 MS patients and 164 healthy control subjects.
  • Haplotype analysis was performed on two single nucleotide polymorphisms (SNPs) within the IL18 gene.

Main Results:

  • A significantly higher frequency of the CC genotype at position -137 of the IL18 gene was observed in MS patients compared to controls (p=0.01, OR=3.17).
  • The CC haplotype, derived from two SNPs in the IL18 gene, was also significantly more prevalent in MS patients (p=0.002, OR=3.0).
  • No significant difference in genotype distribution was found for the IL18 -607 C/A polymorphism between MS patients and controls.

Conclusions:

  • IL18 gene polymorphisms at position -137 may represent a genetic risk factor for multiple sclerosis (MS).
  • These findings highlight the potential role of IL-18 in MS pathogenesis and suggest its utility as a biomarker.
  • Further research is warranted to elucidate the precise mechanisms linking IL-18 genetics to MS development in diverse populations.