| Short-Term Treadmill Running as a Model for Studying Cell-Free DNA Kinetics In Vivo. | |
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MedLine Citation:
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PMID: 21296972 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Increased plasma concentrations of cell-free DNA (cf-DNA) are considered a hallmark of various clinical conditions. Despite intensive research in this field, limited data are available concerning the time course of release and clearance of cf-DNA in vivo. METHODS: We extracted cf-DNA from plasma samples taken before and immediately after a 10-km cross-country run, and from samples taken before, immediately after, and 30 min after exhaustive short-term treadmill exercise. The contribution of nuclear (nDNA) and mitochondrial DNA (mtDNA) was measured by quantitative real-time PCR. The incremental treadmill exercise setup was exploited to delineate the precise sequencing and timing of cf-nDNA, lactate, and high-mobility group box 1 protein (HMGB1) release during the exercise and recovery phases. RESULTS: Postexercise plasma cf-nDNA concentrations in cross-country and treadmill runners were significantly increased, by 7.6-fold and 9.9-fold, respectively (P < 0.001). cf-nDNA concentrations were not correlated with age, sex, or body mass index. Plasma concentrations of cf-nDNA and HMGB1 in postexercise samples of treadmill runners were significantly correlated (r = 0.84; P = 0.004). cf-mtDNA concentrations were not affected by treadmill exercise. Time-course analyses demonstrated that cf-nDNA is released within minutes after the onset of exercise and is rapidly cleared from the circulation after the cessation of exercise. Nearly congruent kinetics for cf-nDNA, lactate, and HMGB1 were observed during the exercise phase. CONCLUSIONS: A single bout of exhaustive short-term treadmill exercise constitutes a versatile model system suitable for addressing basic questions about cf-DNA biology. |
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Authors:
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Thomas Beiter; Annunziata Fragasso; Jens Hudemann; Andreas M Nieß; Perikles Simon |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-2-4 |
Journal Detail:
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Title: Clinical chemistry Volume: - ISSN: 1530-8561 ISO Abbreviation: - Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-2-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9421549 Medline TA: Clin Chem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Sports Medicine, Eberhard-Karls-University of Tuebingen, Tuebingen, Germany; |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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