Ghrelin gene polymorphisms in rheumatoid arthritis.

Area of Science:

• Genetics
• Immunology
• Rheumatology

Background:

• Ghrelin, an orexigenic peptide, possesses anti-inflammatory properties and modulates pro-inflammatory cytokines.
• Altered ghrelin levels are observed in various inflammatory conditions, including rheumatoid arthritis (RA).
• The human preproghrelin gene harbors single nucleotide polymorphisms (SNPs) such as Arg51Gln, Leu72Met, Gln90Leu, and A-501C.

Purpose of the Study:

• To investigate the frequency and clinical significance of four specific ghrelin gene SNPs in Turkish patients with RA.
• To determine if these SNPs are associated with disease activity or damage in RA patients.

Main Methods:

• Genotyping of 103 RA patients and 103 healthy controls for four ghrelin gene SNPs (Arg51Gln, Leu72Met, Gln90Leu, A-501C).
• DNA isolation and genotyping performed using polymerase chain reaction and restriction fragment length polymorphism analysis.
• Disease activity and damage in RA patients assessed via Disease Activity Score-28 (DAS-28) and modified Larsen scoring (MLS).

Main Results:

• No significant differences in genotype distributions or allele frequencies for the four ghrelin gene SNPs between RA patients and controls.
• The A-501C SNP was associated with an earlier onset of RA.
• The Gln90Leu SNP showed an association with less frequent rheumatoid factor positivity in RA patients.

Conclusions:

• The A-501C SNP is linked to earlier RA onset, indicating a potential role for ghrelin gene variations in RA pathogenesis.
• Genetic variations within the ghrelin gene may influence the development and clinical presentation of rheumatoid arthritis.