title: Cyclomaltoheptaose mixed esters of anti-inflammatory drugs and short-chain fatty acids and study of their enzymatic hydrolysis in vitro.
abstract: In an effort to enhance the drug-loading capacity of cyclomaltoheptaose (beta-cyclodextrin, betaCD) and to combine the function of anti-inflammatory drugs with short-chain fatty acids (SCFA), ternary esters incorporating seven copies of an anti-inflammatory drug and 14 copies of a SCFA onto a beta-cyclodextrin core were designed and prepared. Acetic, propionic, or butyric esters were introduced at secondary OH groups, and ibuprofen, flurbiprofen, or felbinac was attached to primary OH groups through ester bonds. Heptakis[2,3-di-O-butanoyl-6-O-2-(biphenyl-4-yl)-ethanoyl]-cyclomaltoheptaose was very stable in aqueous and esterase solution. It was hydrolyzed by alpha-amylase (4 units/mL) with t(1/2) value of 18h. The total released amount of biphenyl acetic acid was 38% after 24h when the esterase was added after the alpha-amylase hydrolysis. The present results suggest that these nine betaCD conjugates may release the anti-inflammatory drug in the colonic contents.
authors.affiliation: Department of Pharmaceutics, China Pharmaceutical University, Nanjing, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Cao
authors.forename: Yong
authors.initials: Y
authors.lastname: Ren
authors.forename: Weiyi
authors.initials: W
authors.lastname: Hua
mesh_terms: D000893:Anti-Inflammatory Agents / Q000737:chemistry* / Q000378:metabolism*; D004950:Esterases / Q000378:metabolism; D004952:Esters / Q000737:chemistry* / Q000378:metabolism*; D005227:Fatty Acids / Q000737:chemistry*; D006868:Hydrolysis; D008958:Models, Molecular; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D000516:alpha-Amylases / Q000378:metabolism; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D000893:Anti-Inflammatory Agents; D004952:Esters; D005227:Fatty Acids; D047392:beta-Cyclodextrins; D004950:Esterases; D000516:alpha-Amylases; C031215:betadex