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- W2082704095 abstract "Abstract Multiple unit delivery dosage forms of biodegradable gelatin microspheres containing the anticancer drug methotrexate (GMM) of various mean particle sizes (1–5, 5–10, and 15–20 μm) were prepared by the polymer dispersion technique and were crosslinked with glutaraldehyde. The GMM were coated with biodegradable natural polymers, namely alginate (AGMM) and chitosan (CGMM), which differ in their pH sensitivity, to obtain two different types of pH dependent delivery systems for oral delivery of methotrexate (MTX). The in vitro release profiles of MTX from AGMM and CGMM were determined in simulated gastric medium, intestinal medium, and in media simulating gastrointestinal tract conditions. The effect of the concentration of coating polymer and particle size on the release rate of MTX from both AGMM and CGMM were also studied. Both AGMM and CGMM provided controlled release of MTX following a zero‐order release pattern in gastric and intestinal fluids for prolonged periods of time. The release rate of MTX decreased with an increase in concentration of the coating polymer as well as an increase in particle size of the microspheres. Both AGMM and CGMM showed good potential as pH dependent multiple unit delivery systems for the controlled release of MTX in oral administration. © 1995 John Wiley & Sons, Inc." @default.
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- W2082704095 date "1995-12-05" @default.
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- W2082704095 title "pH-responsive gelatin microspheres for oral delivery of anticancer drug methotrexate" @default.
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- W2082704095 doi "https://doi.org/10.1002/app.1995.070581014" @default.
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