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[Polymorphism of gene promotor region for MMP-2 in rheumatoid arthritis]
P Nemec1, M Goldbergová, T Swobodnik
1Revmatologická ambulance II. interní kliniky Lékaské fakulty MU a FN u sv. Anny, Brno. petr.nemec@fnusa.cz
Introduction:
Matrix metalloproteinase (MMP) belonging to family of zinc-dependent endopeptidases participates in remodelling of extracellular matrix in many physiological and pathological processes including rheumatoid arthritis (RA). Rheumatoid arthritis is a chronic autoimmune inflammatory multi-systemic disease characterized, among others, by degradation of hyaline articular cartilage and escalated angiogenesis. As a matter of fact, these processes may by influenced by MMP. On the other hand, MMP can suppress inflammation by degrading biologically active molecules like cytokines, chemokines or growth factor receptors. Increased levels of MMP-2 (gelatinase A) are observed in serum and synovial fluid of patients with RA. Gene polymorphism for MMP-2 can affect susceptibility to development and/or severity of RA.
Method:
The aim of the study was to prove possible association of polymorphisms in gene promotor region for MMP-2 (-1575 G/A, -1306 C/T, -790 T/G, -735 C/T) with RA. We worked with 101 patients with RA who met reviewed diagnostic criteria of ACR (1987) for RA, and suffer from RA for at least 2 years. Control group consisted of 101 healthy volunteers of similar age and gender distribution.
Results:
RA patients and control group did not differ in genotype distributions or frequencies of alleles of polymorphisms -1575A/G, -1306C/T and -735 C/T. Significant difference was observed between RA patients and control group in allelic frequencies of polymorphism -790 T/G MMP-2 (T allele -0.70 vs. 0.66, Pa = 0.013). Also, a tendency of GG genotype growth was noted in RA patients (Pg = 0.053). Significant difference in allelic frequencies was also observed between men with RA and men from control group (T allele -0.80 vs. 0.61, Pa = 0.025). Haplotype of GCGC polymorphisms -1575 G/A, -1306 C/T, 790 T/G, -735 C/T was more frequent in RA patients (Pcorr = 0.016; OR = 0.09; confidence interval 0.00-0.65), whereas GCTC haplotype was noted more frequently in control group (Pcorr = 0.017; OR = 1.8; confidence interval 1.17-2.70).
Conclusion:
The results indicate the association between polymorphisms in gene promotor region for MMP-2 and susceptibility to development of RA.
Insights
Genetic variations in the matrix metalloproteinase-2 (MMP-2) promoter region are linked to rheumatoid arthritis (RA) susceptibility. Specifically, the -790 T/G polymorphism and certain haplotypes show significant associations with RA development.
Area of Science:
- Genetics
- Immunology
- Biochemistry
Context:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease involving joint inflammation and cartilage degradation.
- Matrix metalloproteinases (MMPs), particularly MMP-2, play a role in extracellular matrix remodeling and inflammation in RA.
- Gene polymorphisms can influence susceptibility and severity of autoimmune diseases like RA.
Purpose:
- To investigate the association between specific polymorphisms in the MMP-2 gene promoter region (-1575 G/A, -1306 C/T, -790 T/G, -735 C/T) and rheumatoid arthritis (RA).
Summary:
- A significant difference in allelic frequencies for the MMP-2 -790 T/G polymorphism was observed between RA patients and healthy controls.
- Specific haplotypes (GCGC and GCTC) of MMP-2 promoter polymorphisms showed differential distribution between RA patients and controls.
- Allelic frequencies of the -790 T/G polymorphism also differed significantly between male RA patients and male controls.
Impact:
- The findings suggest a potential genetic link between MMP-2 promoter polymorphisms and susceptibility to rheumatoid arthritis.
- This research may contribute to understanding the genetic underpinnings of RA and identifying potential biomarkers.
- Further investigation into MMP-2 gene variations could inform personalized medicine approaches for RA management.
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