Chitosan-5-aminosalicylic acid conjugates for colon-specific drug delivery: Methods of preparation and in vitro evaluations

2020 ◽  
Vol 57 ◽  
pp. 101397 ◽  
Author(s):  
Sirinporn Nalinbenjapun ◽  
Chitchamai Ovatlarnporn
Keyword(s):  
Drug Delivery ◽  
Specific Drug ◽  
Aminosalicylic Acid ◽  
Delivery Methods ◽  
Colon Specific Drug Delivery

Synthesis, characterization and evaluation of poly [glucose acrylate-methacrylic acid] hydrogels for colon-specific drug delivery

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Mehrdad Mahkam
Keyword(s):  
Drug Delivery ◽  
Methacrylic Acid ◽  
Aqueous Media ◽  
In Vitro Release ◽  
Water Soluble ◽  
Specific Drug ◽  
Aminosalicylic Acid ◽  
Gel Swelling ◽  
Colon Specific Drug Delivery

AbstractNew biodegradable polymeric hydrogels based on biocompatible materials, glucose acrylate (GA) and methacrylic acid (MAA) were designed and synthesized. In the first time, the glucose-6-acrylate-1,2,3,4-tetraacetate (GATA) monomer was prepared under mild conditions. The removal of protecting acetate groups from GATA will be carried out before the polymerization and then, the corresponding water soluble glycomonomer (GA) was obtained. This deprotected glycomonomer can be polymerized in aqueous media, which points to a way to obtain polymers with applications in biomedical and biochemical fields. Hydrogel synthesis was carried out by free-radical polymerization of the co-monomers using persulfate as an initiator and N,N′-methylenebisacrylamide as crosslinker. The hydrogels was characterized by FT-IR. Equilibrium swelling studies were carried out in enzyme-free simulated gastric and intestinal fluids (SGF and SIF, respectively). The swelling behaviour of the copolymers was dependent on the content of MAA groups and caused a decrease in gel swelling in pH 1 or an increase in gel swelling in pH 7.4. Model drug, 5-aminosalicylic acid (5-ASA) was entrapped into these hydrogels and the in vitro release profile of this drug was established separately in both enzyme-free SGF and SIF. Based on the great difference in swelling ratio at pH 1 and 7.4 for these hydrogels, it appears to be good candidates for colon-specific drug delivery.

scholarly journals SYNTHESIS AND IN VITRO BIODEGRADATION OF AZO POLYMER FOR COLON-SPECIFIC DRUG DELIVERY

2009 ◽  
Vol 007 (1) ◽  
pp. 8-14
Author(s):  
Junying LAI ◽  
Wenjing LI ◽  
Hongjun WANG ◽  
Kehua TU ◽  
Liqun WANG
Keyword(s):  
Drug Delivery ◽  
Specific Drug ◽  
Azo Polymer ◽  
Colon Specific Drug Delivery
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