title: Fabrication of a novel pH-sensitive glutaraldehyde cross-linked pectin nanogel for drug delivery.
abstract: A novel pH-sensitive nanogel based on pectin cross-linked with glutaraldehyde (PT-GA) was designed and synthesized for drug delivery. Transmission electron microscope observation shows that the nano-sized gel particles exhibit a spherical morphology. The optical absorbance study of nanogel suspension reveals its pH sensitivity. Cytotoxicity study shows that the nanogel has no apparent inhibitory effect on cells. The in vitro drug-release behavior of the drug-loaded nanogel particles in three kinds of media, i.e., simulated gastric fluid, simulated intestine fluid and simulated colon fluid, was studied. PT-GA nanogel exhibits a faster release at a high pH, and the release could be further accelerated in the presence of pectinolytic enzyme, indicating that the nanogel may be used for colon-specific drug delivery.
authors.affiliation: Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan 430072, PR China.
authors.forename: Cong
authors.initials: C
authors.lastname: Chang
authors.forename: Zong-Chun
authors.initials: ZC
authors.lastname: Wang
authors.forename: Chang-Yun
authors.initials: CY
authors.lastname: Quan
authors.forename: Han
authors.initials: H
authors.lastname: Cheng
authors.forename: Si-Xue
authors.initials: SX
authors.lastname: Cheng
authors.forename: Xian-Zheng
authors.initials: XZ
authors.lastname: Zhang
authors.forename: Ren-Xi
authors.initials: RX
authors.lastname: Zhuo
mesh_terms: D016475:3T3 Cells; D000082:Acetaminophen / Q000008:administration & dosage / Q000494:pharmacology; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D003432:Cross-Linking Reagents / Q000737:chemistry; D016503:Drug Delivery Systems / Q000379:methods*; D005976:Glutaral / Q000008:administration & dosage / Q000737:chemistry*; D051379:Mice; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000008:administration & dosage / Q000737:chemistry*; D010316:Particle Size; D010368:Pectins / Q000008:administration & dosage / Q000737:chemistry*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D003432:Cross-Linking Reagents; D000082:Acetaminophen; D010368:Pectins; D005976:Glutaral