title: In vitro and in vivo evaluation of chitosan microspheres with different deacetylation degree as potential embolic agent.
abstract: To evaluate the potential of N-acetylated chitosan microspheres used as a chemoembolic agent in vivo and in vitro. Calibrated spherical chitosan microspheres (CMs) were prepared via Water-in-Oil emulsification method and CMs were acetylated (ACMs). The swelling rate of CMs was greatly affected by pH than that of ACMs and both of them affected by temperature. Microspheres with excellent thermal stability demonstrated controllable degradation in lysozyme solution. Doxorubicin was released from microspheres in vitro and exhibited excellent control release profile. ACMs caused hemolysis less than CMs (<5% of the time). Co-culture with mouse embryo fibroblasts revealed that microspheres have non-cytotoxic nature. Microspheres planted in a rat gluteal muscle demonstrated that it were biodegradable and biocompatible. ACMs were performed in rabbit ear embolization model and ischemic necrosis on ear was visible due to the vascular occlusion after 15 days. Acetylated chitosan microspheres could be used as potential biocompatible and biodegradable embolic agents.
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China; Key Laboratory for Nano-Bio Interface Research, Suzhou Key Laboratory for Nanotheranostics, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China. Electronic address: zhouxuan1008@163.com.
authors.forename: Xuan
authors.initials: X
authors.lastname: Zhou
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Kong
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China.
authors.forename: Xiao Jie
authors.initials: XJ
authors.lastname: Cheng
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Feng
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100022, China.
authors.forename: Jing Jing
authors.initials: JJ
authors.lastname: Li
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China. Electronic address: xgchen@ouc.edu.cn.
authors.forename: Xi Guang
authors.initials: XG
authors.lastname: Chen
mesh_terms: D000107:Acetylation; D000818:Animals; D048271:Chitosan / Q000737:chemistry* / Q000378:metabolism* / Q000494:pharmacology; D004353:Drug Evaluation, Preclinical / Q000379:methods; D004621:Embolization, Therapeutic / Q000379:methods*; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism; D008297:Male; D051379:Mice; D008863:Microspheres; D011817:Rabbits; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar
chemical_list: D048271:Chitosan
keywords: Chemoembilization; Chitosan; Embolic agent; Microspheres; Transcatheter arterial embolization