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polyetilenglicol

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https://www.readbyqxmd.com/read/22292808/tumour-specific-uptake-of-anti-cancer-drugs-the-future-is-here
#1
REVIEW
Michele Caraglia, Monica Marra, Gabriella Misso, Monica Lamberti, Giuseppina Salzano, Giuseppe De Rosa, Alberto Abbruzzese
A challenge of anti-cancer treatment is the specific delivery of the drugs in order to avoid deleterious effects on normal cells. In fact, anti-cancer drugs have potent effects also on normal cells due to the strong similarity of the mechanisms of growth regulation of normal cells if compared to their transformed counterparts. The recent developments in nanotechnology allow the old Ehrlich's dream to deliver anti-cancer drugs in tumour tissue through their encapsulation in drug delivery systems (DDS). In the present review we analyze the different reasons to encapsulate an anti-tumour drug in DDS including eventual damages induced by their extravasation or by eccipients used to their solubilisation, the rapid break-down of the drug in vivo and the specific bio-distribution of the drug in tumour tissues...
January 2012: Current Drug Metabolism
https://www.readbyqxmd.com/read/21226628/enhanced-in-vivo-absorption-of-cb-1-antagonist-in-rats-via-solid-solutions-prepared-by-hot-melt-extrusion
#2
COMPARATIVE STUDY
L S Ranzani, J Font, F Galimany, A Santanach, A M Gomez-Gomar, G Casadevall, A Gryczke
The aim of the present work was to investigate in vitro dissolution properties of three binary solid solutions prepared by a hot-melt extrusion (HME) process with vinyl pirrolidone--vinyl acetate copolymer (Kollidon VA 64), ethyl acrylate, methyl methacrylate polymer (Eudragit E) polyetilenglicol 8000 (PEG 8000) with a cannabinoid type 1 (CB-1) antagonist. Hansen solubility parameters were calculated from the chemical structures of the drug and the individual polymers in order to predict miscibility. Solid state characterizations of drug substance, physical blends and HME formulations were performed with differential scanning calorimetry...
June 2011: Drug Development and Industrial Pharmacy
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