首页|Microenvironment responsive pod-structured astaxanthin nanocarrier for ameliorating inflammatory bowel disease
Microenvironment responsive pod-structured astaxanthin nanocarrier for ameliorating inflammatory bowel disease
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Anti-inflammatory drugs targeting inflammatory bowel disease(IBD)have attracted considerable atten-tion but still face low therapeutic outcomes and frequent side effects.Astaxanthin(ATX),a natural ketone,possesses potent antioxidant and anti-inflammatory properties.However,it faces problems such as poor water solubility,photothermal instability,and low bioavailability.Here,we employed a supramolecular encapsulation strategy to create a nanoscale oral delivery system for ATX(referred to as FC-ATX NPs)by coupling fucoidan(FUC)with chitosan oligosaccharides(COS).The obtained FC-ATX NPs exhibited a particular"bean pod"structure with uniform size,good encapsulation efficiency,excellent physical and chemical stability,pH-triggered intestinal targeted slow-release properties,and potent antioxidant capac-ity.In vitro cell culture experiments showed that FC-ATX NPs promoted cellular uptake and scavenged excessive intracellular reactive oxygen species(ROS).In mouse models of colitis,FC-ATX NPs enhanced the drug absorption of intestinal epithelial cells and effectively accumulated at the site of inflammation.This work provides an efficient approach to enhance the bioavailability of ATX and has excellent applica-tion potential as an oral targeted delivery system for colitis therapy.
Key Laboratory of Luminescence Analysis and Molecular Sensing,Ministry of Education,School of Materials and Energy&Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices,Southwest University,Chongqing 400715,China
College of Food Science,Southwest University,Chongqing 400715,China
State Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan University,Changsha 410082,China
Chongqing Graduate Program of Research and InnovationNational Natural Science Foundation of ChinaChongqing Talents of Exceptional Young Talents Project,ChinaChongqing Talents of Exceptional Young Talents Project,China
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