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Article: In vivo biocompatibility study of ABA triblock copolymers consisting of poly(L-lactic-co-glycolic acid) A blocks attached to central poly(oxyethylene) B blocks

TitleIn vivo biocompatibility study of ABA triblock copolymers consisting of poly(L-lactic-co-glycolic acid) A blocks attached to central poly(oxyethylene) B blocks
Authors
Issue Date1996
Citation
Journal of Biomedical Materials Research, 1996, v. 30, n. 1, p. 31-40 How to Cite?
AbstractFilms of three ABA-block copolymers composed of lacticco-glycolic acid A blocks and poly(oxyethylene) (PEO) B blocks and one random lactic-co-glycolic acid copolymer (PLG) were studied to investigate the influence of different polymer compositions and molecular weights on the tissue reaction, appearance of toxic degradation products, and swelling behavior in the cage implant system in rats. The inflammatory tissue reaction was followed over a 21-day implantation period by monitoring the leukocyte concentration, the extracellular acid, and alkaline phosphatase activities in a quantitative manner. Size and density of adherent macrophages and foreign body giant cells on the film surfaces were determined. The ABA and PLG implants caused only a minimal inflammatory reaction, as characterized by a low concentration of leukocytes during the implantation period when compared to empty cage controls. The content of PEO had an influence on the density of the adherent cells on the surface of the polymer film. An increase in PEO content and molecular weight decreased the cellular density during the implantation period. As demonstrated by scanning electron microscopy, no degradation was observed for all polymers during the implantation period. Our results demonstrate that the ABA block copolymers and PLG copolymer are equally well tolerated in the cage implant test system. | Films of three ABA-block copolymers were studied to investigate the influence of different polymer compositions and molecular weights on the tissue reaction, in the cage implant system in rats. The inflammatory tissue reaction was followed over a 21-day implantation period by monitoring the leukocyte concentration, the extracellular acid, and alkaline phosphatase activities in a quantitative manner. Size and density of adherent macrophages and foreign body giant cells on the film surfaces were determined. The ABA and PLG implants caused only a minimal inflammatory reaction. The content of PEO had an influence on the density of the adherent cells on the surface of the polymer film. As demonstrated by scanning electron microscopy, no degradation was observed for all polymers during the implantation period. Thus, the ABA block copolymers and PLG copolymer are equally well tolerated in the cage implant test system.
Persistent Identifierhttp://hdl.handle.net/10722/216146
ISSN
2004 Impact Factor: 3.652
2006 SCImago Journal Rankings: 0.474

 

DC FieldValueLanguage
dc.contributor.authorRonneberger, B.-
dc.contributor.authorKao, W. J.-
dc.contributor.authorAnderson, J. M.-
dc.contributor.authorKissel, T.-
dc.date.accessioned2015-08-25T10:21:50Z-
dc.date.available2015-08-25T10:21:50Z-
dc.date.issued1996-
dc.identifier.citationJournal of Biomedical Materials Research, 1996, v. 30, n. 1, p. 31-40-
dc.identifier.issn0021-9304-
dc.identifier.urihttp://hdl.handle.net/10722/216146-
dc.description.abstractFilms of three ABA-block copolymers composed of lacticco-glycolic acid A blocks and poly(oxyethylene) (PEO) B blocks and one random lactic-co-glycolic acid copolymer (PLG) were studied to investigate the influence of different polymer compositions and molecular weights on the tissue reaction, appearance of toxic degradation products, and swelling behavior in the cage implant system in rats. The inflammatory tissue reaction was followed over a 21-day implantation period by monitoring the leukocyte concentration, the extracellular acid, and alkaline phosphatase activities in a quantitative manner. Size and density of adherent macrophages and foreign body giant cells on the film surfaces were determined. The ABA and PLG implants caused only a minimal inflammatory reaction, as characterized by a low concentration of leukocytes during the implantation period when compared to empty cage controls. The content of PEO had an influence on the density of the adherent cells on the surface of the polymer film. An increase in PEO content and molecular weight decreased the cellular density during the implantation period. As demonstrated by scanning electron microscopy, no degradation was observed for all polymers during the implantation period. Our results demonstrate that the ABA block copolymers and PLG copolymer are equally well tolerated in the cage implant test system. | Films of three ABA-block copolymers were studied to investigate the influence of different polymer compositions and molecular weights on the tissue reaction, in the cage implant system in rats. The inflammatory tissue reaction was followed over a 21-day implantation period by monitoring the leukocyte concentration, the extracellular acid, and alkaline phosphatase activities in a quantitative manner. Size and density of adherent macrophages and foreign body giant cells on the film surfaces were determined. The ABA and PLG implants caused only a minimal inflammatory reaction. The content of PEO had an influence on the density of the adherent cells on the surface of the polymer film. As demonstrated by scanning electron microscopy, no degradation was observed for all polymers during the implantation period. Thus, the ABA block copolymers and PLG copolymer are equally well tolerated in the cage implant test system.-
dc.languageeng-
dc.relation.ispartofJournal of Biomedical Materials Research-
dc.titleIn vivo biocompatibility study of ABA triblock copolymers consisting of poly(L-lactic-co-glycolic acid) A blocks attached to central poly(oxyethylene) B blocks-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1002/(SICI)1097-4636(199601)30:1<31::AID-JBM5>3.0.CO;2-S-
dc.identifier.pmid8788103-
dc.identifier.scopuseid_2-s2.0-0030064723-
dc.identifier.volume30-
dc.identifier.issue1-
dc.identifier.spage31-
dc.identifier.epage40-

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