Interpolymer Complexes of Eudragit® Copolymers as Novel Carriers for Colon-Specific Drug Delivery.
Interpolymer complexes (IPC) based on Eudragit® EPO and Eudragit® S100 were investigated as potential carriers for oral controlled drug delivery to the colon. IPC samples were prepared by mixing copolymer solutions in organic solvents (ethanol, isopropanol:acetone mixture (60:40, % v/v) and tetrahydrofuran). According to the data of elemental analysis, FTIR-spectroscopy, X-ray photoelectron spectroscopy and thermal analysis these IPCs have excess of anionic copolymer (Eudragit® S100) in their structure; they are stabilized by hydrogen and ionic intermacromolecular bonds and do not include free copolymer domains. IPC have pH-independent swelling properties in the media mimicking gastrointestinal tract (GIT) conditions and provide colon-specific delivery of indomethacin in buffer solutions (pH 1.2; 5.8; 6.8; 7.4) and in biorelevant media (fasted state simulated gastric fluid, fasted state simulated intestinal fluid-version 2 and fasted stated simulated colonic fluid).
['Bukhovets|Aleksandra V|AV|', 'Fotaki|Nikoletta|N|0000-0003-1826-7363', 'Khutoryanskiy|Vitaliy V|VV|0000-0002-7221-2630', 'Moustafine|Rouslan I|RI|0000-0002-0916-2853']
interpolymer complexes controlled drug delivery biorelevant media Eudragit®, indomethacin drug delivery systems oral drug delivery