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  • Title: Steroid therapy improves endothelial function in patients with biopsy-proven giant cell arteritis.
    Author: Gonzalez-Juanatey C, Llorca J, Garcia-Porrua C, Sanchez-Andrade A, Martín J, Gonzalez-Gay MA.
    Journal: J Rheumatol; 2006 Jan; 33(1):74-8. PubMed ID: 16395753.
    Abstract:
    OBJECTIVE: Endothelial dysfunction has been found to be present in subjects with both small and medium-size blood vessel vasculitides. We assess whether endothelial dysfunction was also present in patients with biopsy-proven giant cell arteritis (GCA) and whether it might be improved following steroid treatment. METHODS: Endothelial function was determined in cross-sectional and longitudinal studies of 6 patients with biopsy-proven GCA diagnosed between January and May 2002 by measuring flow-mediated endothelial-dependent and independent vasodilatation (EDV and EIV) by brachial ultrasonography. Patients were assessed for endothelial function within 48 hours after the onset of steroid therapy, 4 weeks after the onset of steroid therapy, and 2 years after the disease diagnosis. RESULTS: EDV was significantly impaired in patients with GCA compared with 12 matched controls [mean 2.9%, median 2.45% (range 2.1% to 4.7%) vs mean 6.5%, median 6.6% (range 3.9% to 9.3%) in matched controls; p = 0.002]. However, no significant difference existed between patients and controls in EIV. Significant improvement of EDV after the suppression of inflammation was achieved. At Week 4 after the onset of steroid therapy all 6 patients showed enhanced responses (p = 0.028). This improvement of EDV was still present when steroid treatment was ended, 2 years after diagnosis. CONCLUSION: Endothelial function is significantly impaired in individuals with active biopsy-proven GCA. The results highlight the importance of steroid therapy to improve endothelial function after suppression of the inflammation of GCA.
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