Functionalized (poly(?-caprolactone))₂-poly(ethylene glycol) nanoparticles with grafting nicotinic acid as drug carriers

详细信息    查看全文

• 作者：Jiraphong Suksiriworapong^a ; Kittisak Sripha^b ; Jö ; rg Kreuter^c ; Varaporn Buraphacheep Junyaprasert^a ; ^{pyvbp@mahidol.ac.th}
• 关键词：Ibuprofen ; Indomethacin ; Nanoparticle ; Nicotinic acid ; Poly(?-caprolactone) ; Poly(ethylene glycol)
• 刊名：International Journal of Pharmaceutics
• 出版年：2012
• 出版时间：28 February 2012
• 年：2012
• 卷：423
• 期：2
• 页码：562-570
• 全文大小：1210 K

文摘

Nicotinic acid was grafted on (poly(?-caprolactone))₂-poly(ethylene glycol) copolymers that were used for the preparation of nanoparticles with the objectives to monitor particle size and to optimize the drug loading capacity as well as the release profile of the particles. Increasing amounts of grafting nicotinic acid increased the particle size as a result of an enhanced hydrophobicity of the copolymer. Ibuprofen and indomethacin with two different molecular characteristics were selected as model drugs to be bound to the nanoparticles. The presence of grafting nicotinic acid enhanced the loading capacity for both drugs compared to the nanoparticles without nicotinic acid. However, no correlation between amount of grafting nicotinic acid and loading capacity was observed. The release characteristic of both drugs was fitted to the Higuchi model indicating Fickian diffusion. The release characteristic of indomethacin mainly depended on the crystalline property of the copolymer whereas that of ibuprofen was additionally influenced by the hydrogen bonding between drug and grafted copolymer.