| Pattern of activin A and follistatin release in a sheep model of cardiopulmonary bypass. | |
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MedLine Citation:
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PMID: 21320787 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: Activin A, a member of transforming growth factor-β superfamily, has been established as a critical cytokine released early in endotoxemia and other inflammatory syndromes. The release of activin A and its binding protein, follistatin during cardiopulmonary bypass (CPB) has not been previously reported. Our study aimed to define the pattern of activin A and follistatin release in a sheep CPB model. METHODS: Control group consisted of left thoractomy alone (n=6). CPB was performed using either unfractionated heparin (n=6) or lepirudin (n=6) as anticoagulant. Unlike heparin, lepirudin does not cause activin A and follistatin release on its own. Serum samples were assayed for activin A, follistatin, tumour necrosis factor-α and interleukin-6. RESULTS: Compared with the control group, CPB using lepirudin was associated with a biphasic release of activin A. The first peak occurred within the first hour of CPB and a second peak occurred within the early post-operative period, coincident with a large release of follistatin. Close correlation was found between follistatin and IL-6 in the control and lepirudin groups, indicative of a role for follistatin in the acute phase response. In contrast to the control and lepirudin groups, CPB using heparin resulted in a concurrent release of activin A and follistatin. CONCLUSIONS: CPB is a trigger for the release of biologically-active free activin A into the circulation, at levels considerably greater than that induced by surgery alone. Triggering release of this critical inflammatory cytokine suggests that activin A may contribute to the adverse outcomes associated with systemic inflammation in cardiac surgery. |
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Authors:
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Yi Chen; David J Phillips; James McMillan; Penny Bedford; Jacob Goldstein; Hui Wu; Mark P Hedger; Julian A Smith |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-2-12 |
Journal Detail:
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Title: Cytokine Volume: - ISSN: 1096-0023 ISO Abbreviation: - Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-2-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9005353 Medline TA: Cytokine Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Crown Copyright © 2011. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Surgery (Monash Medical Centre), Monash University, Victoria, Australia; Monash Institute of Medical Research, Monash University, Victoria, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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