کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9901509 | 1545424 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development and in vitro evaluation of a liposome based implant formulation for the decapeptide cetrorelix
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کلمات کلیدی
CxAPLScetrorelix acetateLuteinising hormone-releasing hormoneLHRHCetrorelixVPgPCA - PCASustained release - آزادی پایدارIn vitro release - آزمایشی in vitroPrincipal component analysis - تحلیل مولفههای اصلی یا PCAPartial least square regression - حداقل رگرسیون حداقل مربعPCs - رایانه های شخصیphoton correlation spectroscopy - طیف سنجی همبستگی فوتونphosphatidylcholine - فسفاتیدیل کولینLiposome - لیپوزوم هاFSH - هورمون محرکه فولیکولی Peptide - پپتید
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیوتکنولوژی یا زیستفناوری
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چکیده انگلیسی
Semisolid phospholipid dispersions of vesicular morphology, so-called vesicular phospholipid gels (VPGs), were prepared by high-pressure homogenisation and tested in vitro for their suitability as implantable sustained release system for the decapeptide cetrorelix, a potent LH-RH antagonist. The VPGs contained 300-500Â mg/g egg phosphatidylcholine (E80) and 0.5-10Â mg/g cetrorelix acetate (CXA). The in vitro release experiments showed a wide variability of the system in release, ranging from complete release within less than 24Â h (0.5Â mg/g CXA; 400Â mg/g E80) to a predicted 80% sustained release over 3 months (8.6Â mg/g CXA; 280Â mg/g E80). Erosion of the phospholipid matrix, i.e. release of phospholipid vesicles was found to be the main release mechanism, following zero order or first order kinetics depending on the composition of the VPG. CXA-concentration dependent drug-drug or drug-lipid interactions are assumed to be responsible for the change in release kinetics and the decrease of CXA release at high concentrations of the peptide. Multivariate analysis revealed that both lipid concentration and peptide concentration and also the interactions between the two factors are significant factors for the release rate of the peptide. In summary: based on the presented in vitro release data sustained release of therapeutically relevant CXA doses over up to 6 weeks appears feasible. VPGs are thus considered as a promising new approach for the sustained release of peptide hormones.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Pharmaceutics and Biopharmaceutics - Volume 59, Issue 3, April 2005, Pages 439-448
Journal: European Journal of Pharmaceutics and Biopharmaceutics - Volume 59, Issue 3, April 2005, Pages 439-448
نویسندگان
Holger Grohganz, Ingunn Tho, Martin Brandl,