| Poly(sebacic acid-co-ricinoleic acid) biodegradable injectable in situ gelling polymer. | |
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MedLine Citation:
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PMID: 16398527 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The investigated polymers, poly(sebacic acid-co-ricinoleic acid) containing > or =70% ricinoleic acid, may be injected via a 22 gauge needle and become gel upon contact with aqueous medium, both in vitro and in vivo. Various properties of the polymers including viscosity, thermal analysis, and in vivo behavior, before and after exposure to aqueous medium, were determined. These polymers were observed using scanning electron microscopy (SEM) at dry and wet states. It was found that the viscosity and melting temperature of P(SA:RA) increased after exposure to buffer. The viscosity at 37 degrees C of P(SA:RA)3:7 had the highest increase: from 4200 cP before to 8940 cP after exposure to buffer; in the case of P(SA:RA)25:75 before exposure to buffer the viscosity was 1150 cP while after it raised to 3200 cP. The viscosity of P(SA:RA)2:8 also increased from 400 cP before exposure to buffer to 1000 cP after. On the other hand polymer without sebacic acid, (poly(ricinoleic acid)), did not show gelation properties. Thermal analysis also showed an increase in the melting point of the polymers exposed to the aqueous medium during the first 24 h of incubation. Images obtained by SEM showed formation of a three-dimensional network in polymers exposed to buffers. When injected into animals, P(SA:RA) forms a solid implant in the injection site already at 8 h postinjection. |
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Authors:
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Ariella Shikanov; Abraham J Domb |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Biomacromolecules Volume: 7 ISSN: 1525-7797 ISO Abbreviation: Biomacromolecules Publication Date: 2006 Jan |
Date Detail:
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Created Date: 2006-01-09 Completed Date: 2006-03-02 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 100892849 Medline TA: Biomacromolecules Country: United States |
Other Details:
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Languages: eng Pagination: 288-96 Citation Subset: IM |
Affiliation:
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Department of Medicinal Chemistry and Natural Products, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biocompatible Materials / administration & dosage*, chemistry*, pharmacokinetics Calorimetry, Differential Scanning Cryoelectron Microscopy Decanoic Acids / administration & dosage, chemistry*, pharmacokinetics* Female Gels / administration & dosage, chemistry*, pharmacokinetics Injections Mice Mice, Inbred C3H Microscopy, Electron, Scanning Molecular Structure Polymers / administration & dosage, chemistry*, pharmacokinetics* Ricinoleic Acids / administration & dosage, chemistry*, pharmacokinetics* Temperature Viscosity Water |
| Chemical | |
Reg. No./Substance:
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0/Biocompatible Materials; 0/Decanoic Acids; 0/Gels; 0/Poly(sebacic acid-co-ricinoleic acid); 0/Polymers; 0/Ricinoleic Acids; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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