| Adsorption of drugs onto a pH responsive poly(N,N-dimethyl aminoethyl methacrylate) grafted anion-exchange membrane in vitro. | |
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MedLine Citation:
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PMID: 17289313 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The influence of charge and lipophilicity of acidic and basic model drugs on their adsorption onto poly(N,N-dimethyl aminoethyl methacrylic acid) grafted poly(vinylidene fluoride) (DMAEMA-PVDF) membranes was evaluated. The effect of serum proteins (albumin, IgG) and hormones (cortisol, free thyroxine (T(4)F) and thyrotropin (TSH)) on drug adsorption was also studied. Acidic model drugs (antiepileptics and benzodiazepies) adsorbed to a greater extent onto the membrane from Hepes buffer at ionic strength of 25mM and pH 7.0 than basic drugs (antidepressants) did. Adsorption of acidic model drugs was based on electrostatic interactions between positively charged tertiary amino groups of DMAEMA side-chain and acidic negatively charged drug. Albumin diminished the adsorption of drugs from serum onto the membrane. Lipophilicity was related to the adsorption of acidic model drugs from serum onto the membrane. The degree of grafting had the greatest effect on adsorption of lipophilic drugs, but no influence was observed on adsorption of hydrophilic drugs. The present results showed that acidic drugs and albumin adsorbed onto the membrane, which suggests that the PVDF-DMAEMA membrane may be suitable for separating acidic drugs from protein-free substances for subsequent monitoring and evaluation. |
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Authors:
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Jouni Karppi; Satu Akerman; Kari Akerman; Annika Sundell; Kristiina Nyyssönen; Ilkka Penttilä |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-01-19 |
Journal Detail:
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Title: International journal of pharmaceutics Volume: 338 ISSN: 0378-5173 ISO Abbreviation: Int J Pharm Publication Date: 2007 Jun |
Date Detail:
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Created Date: 2007-05-28 Completed Date: 2007-07-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7804127 Medline TA: Int J Pharm Country: Netherlands |
Other Details:
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Languages: eng Pagination: 7-14 Citation Subset: IM |
Affiliation:
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Laboratory Centre, Kuopio University Hospital, P.O. Box 1777, FIN-70211 Kuopio, Finland. jouni.karppi@uku.fi |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Hydrogen-Ion Concentration Membranes, Artificial* Methacrylates / chemistry* Polymers / chemistry* Polyvinyls / chemistry Solubility |
| Chemical | |
Reg. No./Substance:
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0/Membranes, Artificial; 0/Methacrylates; 0/Polymers; 0/Polyvinyls; 24937-79-9/polyvinylidene fluoride; 2867-47-2/2-(dimethylamino)ethyl methacrylate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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