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Serum biobank certification and the establishment of quality controls for biological fluids: examples of serum biomarker stability after temperature variation
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Christine Chaigneau
Veröffentlicht/Copyright:
10. Oktober 2007
Abstract
Background: One of the main issues in biobanking is the establishment of standard operating procedures for specimen collection, preparation and storage to control for pre-analytical variation. For biological fluids such as serum, there is currently a lack of sensitive biomarkers for the quality control of cryopreservation conditions.
Methods: The process approach was used to establish an ISO 9001:2000 quality management system. Immunoenzymatic and functional assays were used to assess the stability of the following candidate quality control biomarkers: secretory phospholipase A2, matrix metalloprotease 7, transforming growth factor β1 and anti-HBs immunoglobulin.
Results: Five product processes and their corresponding indicators were identified. In the preparation-aliquoting-storage process, no quality control indicator for serum was identified. Only matrix metalloprotease 7 showed moderate susceptibility to freeze-thaw cycles.
Conclusions: Biomarkers that have an on-off response to temperature variation could serve as quality indicators for the core processes of biobanking, which are the preparation and storage of biological fluids. The identification of such biomarkers is needed.
Clin Chem Lab Med 2007;45:1390–5.
Received: 2006-11-29
Accepted: 2007-3-27
Published Online: 2007-10-10
Published in Print: 2007-10-01
©2007 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
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