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  • Title: High prevalence of serum metabolic alterations in primary Sjögren's syndrome: influence on clinical and immunological expression.
    Author: Ramos-Casals M, Brito-Zerón P, Sisó A, Vargas A, Ros E, Bove A, Belenguer R, Plaza J, Benavent J, Font J.
    Journal: J Rheumatol; 2007 Apr; 34(4):754-61. PubMed ID: 17309127.
    Abstract:
    OBJECTIVE: To analyze the prevalence and clinical significance of associated metabolic alterations [dyslipidemia, diabetes mellitus (DM), and hyperuricemia] in a large series of unselected patients with primary Sjögren's syndrome (SS). METHODS: We analyzed 254 consecutive patients with primary SS who had a complete analytical followup study for at least 5 consecutive years. The control group consisted of 254 age and sex-matched patients without systemic autoimmune diseases consecutively followed during the same period in a primary care center. RESULTS: In comparison with controls, patients with primary SS showed a higher frequency of dyslipidemia (47% vs 33%; p = 0.002), DM (28% vs 18%; p = 0.006), and hyperuricemia (9% vs 4%; p = 0.007). The mean age at SS diagnosis was 10 years greater in patients with DM (p < 0.001) and hyperuricemia (p = 0.009). Hypercholesterolemia was associated with a lower frequency of immunological markers such as anti-Ro/SSA antibodies (p = 0.001), anti-La/SSB antibodies (p = 0.005), low C3 (p = 0.047), and low C4 levels (p = 0.030), while hypertriglyceridemia and DM were associated with a higher prevalence of extraglandular features, especially renal, liver, and vasculitic involvement. A higher prevalence of DM was found in patients treated with corticosteroids (40% vs 19%; p = 0.001). CONCLUSION: Patients with primary SS showed a higher prevalence of associated dyslipidemia, DM, and hyperuricemia in comparison with an age and sex-matched control group. Metabolic alterations were associated with a differentiated pattern of clinical and immunological SS expression, but not with SS-related therapies (except for the higher frequency of DM observed in patients treated with corticosteroids).
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