Increased interstitial concentrations of pyruvate and lactate in the trapezius muscle of patients with fibromyalgia: A microdialysis study
Design: Comparative cross-sectional study.
Subjects: Patients with fibromyalgia (n=19) and healthy controls (n=19); all women.
Methods: Subjects answered a questionnaire about different aspects of pain. Pressure pain thresholds over the trapezius and tibialis anterior muscles were determined. The inter stitial concentrations of pyruvate, lactate and glutamate were determined in the resting trapezius muscle by the microdialysis technique, with samples collected every hour for 5 consecutive hours. Pain intensity was also rated.
Results: Significantly higher interstitial concentrations of pyruvate and lactate were found in patients with fibromyalgia syndrome. The multivariate regression analyses of group membership and pressure pain thresholds of the trapezius confirmed the importance of pyruvate and lactate.
Conclusion: Different mechanisms that may increase pyruvate and lactate in patients with fibromyalgia syndrome are discussed. Improved understanding of peripheral muscle alterations in patients with fibromyalgia syndrome could lead to mechanism-based rehabilitation.
Document Type: Research Article
Publication date: July 1, 2010
Journal of Rehabilitation Medicine is the international peer-reviewed journal published in English, with at least 10 issues published per year.
Original articles, reviews, case reports, short communications, special reports and letters to the editor are published, as also are editorials and book reviews. The journal strives to provide its readers with a variety of topics including: functional assessment and intervention studies, clinical studies in various patient groups, methodology in physical and rehabilitation medicine, epidemiological studies on disabling conditions and reports on vocational and sociomedical aspects of rehabilitation.
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