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Updated: Aug 7, 2026

Measuring Psoriasis Severity at Home
Published on: March 1, 2024
PPAR-gamma gene polymorphisms and psoriatic arthritis
Christopher Butt1, Dafna Gladman, Proton Rahman
1St. Clare's Mercy Hospital, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.
This study found an association between a specific gene variant in peroxisome proliferator-activated receptor-gamma (PPAR-gamma) and psoriatic arthritis (PsA) in Caucasians. Further research is needed to confirm these findings in other populations.
Area of Science:
- Genetics
- Immunology
- Rheumatology
Background:
- Psoriatic arthritis (PsA) involves inflammation and angiogenesis.
- Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) activation may suppress these pathological features.
- Investigating PPAR-gamma gene polymorphisms could reveal insights into PsA pathogenesis.
Purpose of the Study:
- To examine known coding polymorphisms in the PPAR-gamma gene within a Caucasian population diagnosed with psoriatic arthritis.
- To determine if specific PPAR-gamma gene variants are associated with the development or progression of PsA.
Main Methods:
- Genotyping of 4 PPAR-gamma single-nucleotide polymorphisms (SNPs) in Caucasian PsA patients and controls.
- Utilized time-of-flight mass spectrometry on the Sequenom platform for SNP analysis.
- Analyzed coding variations, including Pro12Ala, Pro40Ala, Pro115Gln, and C161T SNPs.
Main Results:
- Pro40Ala and Pro115Gln PPAR-gamma variants were nonpolymorphic in the studied population.
- A statistically significant difference in minor allele frequency was observed for the Pro12Ala (rs1801282) SNP between PsA patients and controls (p = 0.017).
- The C161T (rs3856806) SNP showed no significant association with PsA (p = 0.56).
Conclusions:
- An association exists between a coding single-nucleotide polymorphism (SNP) in the PPAR-gamma gene and psoriatic arthritis in the examined Caucasian cohort.
- The Pro12Ala variant of PPAR-gamma warrants further investigation for its role in PsA.
- Validation in independent cohorts is recommended to confirm these genetic associations.
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