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  • Title: Association between a stromal cell-derived factor 1 (SDF-1/CXCL12) gene polymorphism and microvascular disease in systemic sclerosis.
    Author: Manetti M, Liakouli V, Fatini C, Cipriani P, Bonino C, Vettori S, Guiducci S, Montecucco C, Abbate R, Valentini G, Matucci-Cerinic M, Giacomelli R, Ibba-Manneschi L.
    Journal: Ann Rheum Dis; 2009 Mar; 68(3):408-11. PubMed ID: 18930992.
    Abstract:
    OBJECTIVE: To investigate the possible implication of SDF1-3' polymorphism in systemic sclerosis (SSc) susceptibility or clinical phenotype, or both. METHODS: 150 patients with SSc and 150 controls were enrolled. Skin involvement, autoantibodies, interstitial lung disease, pulmonary arterial hypertension (PAH), scleroderma renal crisis, past and/or current skin ulcers were assessed. Genotyping was performed by PCR-RFLP. RESULTS: Genotype distribution and allele frequency were similar in SSc and controls. SDF1-3'A allele and SDF1-3'GA/AA genotype frequencies were significantly higher in SSc-PAH than in SSc-non-PAH (33.3% vs 18.3%, p = 0.01) and in SSc with skin ulcers than in SSc without ulcers (27.3% vs 16.9%, p = 0.03). The SDF1-3'A allele influenced the predisposition to SSc-related PAH (OR = 2.52, 95% CI 1.11 to 5.69, p = 0.02) and skin ulcers (OR = 2.31, 95% CI 1.18 to 4.52, p = 0.01). After adjustment for age and gender, the SDF1-3'A allele remained a susceptibility factor for the SSc-related vascular manifestations (PAH: OR = 2.37, 95% CI 1.04 to 5.42, p = 0.04; ulcers: OR = 2.33, 95% CI 1.78 to 4.62, p = 0.01). CONCLUSION: The SDF1-3'A allele is significantly associated with microvascular involvement in SSc.
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