| Inducing local T cell apoptosis with anti-Fas-functionalized polymeric coatings fabricated via surface-initiated photopolymerizations. | |
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MedLine Citation:
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PMID: 20138358 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cell encapsulation has long been investigated as a means to achieve transplant immunoprotection as it creates a physical barrier between allograft tissue and host immune cells. Encapsulation with passive barrier materials alone, however, is generally insufficient to protect donor tissue from rejection, because small cytotoxic molecules produced by activated T cells can diffuse readily into the capsule and mediate allograft death. As a means to provide bioactive protection for polymeric encapsulation devices, we investigated a functionalized polymeric coating that mimics a natural T cell regulation pathway. T cells are regulated in vivo via Fas, a well-known 'death receptor,' whereby effector cells express Fas ligand and elicit T cell apoptosis upon binding the Fas receptor on a T cell surface. Anti-Fas antibodies are capable of replicating this effect and induce T cell apoptosis in solution. Here, an iniferter-based living radical polymerization was utilized to fabricate surface-anchored polymer chains containing poly(ethylene glycol) with covalently incorporated pendant anti-Fas antibody. Using this reaction mechanism, we demonstrate fabrication conditions that yield surface densities in excess of 1.5 ng/cm(2) of incorporated therapeutic, as detected by ELISA. Additionally, we show that coatings containing anti-Fas antibody induced significant T cell apoptosis, 21+/-2% of cells, after 24h. Finally, the incorporation of a T cell adhesion ligand, intracellular adhesion molecule-1, along with anti-Fas antibody, yielded even higher levels of apoptosis, 34+/-1% of T cells, compared to either signal alone. |
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Authors:
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Patrick S Hume; Kristi S Anseth |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Biomaterials Volume: 31 ISSN: 1878-5905 ISO Abbreviation: Biomaterials Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-02-23 Completed Date: 2010-06-03 Revised Date: 2010-12-03 |
Medline Journal Info:
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Nlm Unique ID: 8100316 Medline TA: Biomaterials Country: England |
Other Details:
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Languages: eng Pagination: 3166-74 Citation Subset: IM |
Copyright Information:
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Published by Elsevier Ltd. |
Affiliation:
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Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Antigens, CD95 / antagonists & inhibitors, immunology* Apoptosis* Cell Adhesion Enzyme-Linked Immunosorbent Assay Humans Jurkat Cells Mice Photochemistry* Polymers / chemistry* T-Lymphocytes / cytology* |
| Grant Support | |
ID/Acronym/Agency:
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R01 DK076084-02/DK/NIDDK NIH HHS; R01 DK076084-04/DK/NIDDK NIH HHS; R01DK076084/DK/NIDDK NIH HHS; //Howard Hughes Medical Institute |
| Chemical | |
Reg. No./Substance:
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0/Antigens, CD95; 0/Polymers |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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