| The effect of amphiphilic siloxane oligomers on fibroblast and keratinocyte proliferation and apoptosis. | |
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MedLine Citation:
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PMID: 20725963 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The formation of hypertrophic scars (HSF) is a frequent medical outcome of wound repair and often requires further therapy with treatments such as silicone gel sheets (SGS) or apoptosis-inducing agents, including bleomycin. Although widely used, knowledge regarding SGS and their mode of action is limited. Preliminary research has shown that small amounts of amphiphilic silicone present in SGS have the ability to move into skin during treatment. We demonstrate herein that a commercially available analogue of these amphiphilic siloxane species, the rake copolymer GP226, decreases collagen synthesis on exposure to cultures of fibroblasts derived from HSF. By size exclusion chromatography, GP226 was found to be a mixture of siloxane species, containing five fractions of different molecular weight. By studies of collagen production, cell viability and proliferation, it was revealed that a low molecular weight fraction (fraction IV) was the most active, reducing the number of viable cells present after treatment and thereby reducing collagen production as a result. On exposure of fraction IV to human keratinocytes, viability and proliferation were also significantly affected. HSF undergoing apoptosis after application of fraction IV were also detected via real-time microscopy and by using the TUNEL assay. Taken together, these data suggests that these amphiphilic siloxanes could be potential non-invasive substitutes to apoptotic-inducing chemical agents that are currently used as scar treatments. |
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Authors:
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Emily C Lynam; Yan Xie; Bree Loli; Tim R Dargaville; David I Leavesley; Graeme A George; Zee Upton |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of biomedical materials research. Part A Volume: 95 ISSN: 1552-4965 ISO Abbreviation: J Biomed Mater Res A Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-09-22 Completed Date: 2011-01-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101234237 Medline TA: J Biomed Mater Res A Country: United States |
Other Details:
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Languages: eng Pagination: 620-31 Citation Subset: IM |
Affiliation:
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Tissue Repair and Regeneration Program, Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, Queensland, Australia. emily.lynam@qut.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Apoptosis
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drug effects* Biocompatible Materials / chemistry, pharmacology Cell Proliferation / drug effects* Cell Survival / drug effects Cells, Cultured Cicatrix, Hypertrophic / pathology Coculture Techniques Fibroblasts* / cytology, drug effects, physiology Humans Keratinocytes* / cytology, drug effects, physiology Materials Testing Siloxanes / pharmacology* Surface-Active Agents / pharmacology* |
| Chemical | |
Reg. No./Substance:
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0/Biocompatible Materials; 0/Siloxanes; 0/Surface-Active Agents |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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