title: Immunophilin FK506 loaded in chitosan guide promotes peripheral nerve regeneration.
abstract: Immunophilin ligand FK506 has been treated as adjunct therapy for nerve repair due to its potent neurotrophic and neuroprotective actions. It was hypothesized that FK506 releasing from biodegradable chitosan guide provided better nerve regenerative response than the guide with no FK506. The drug was entrapped in the semi-permeable wall of chitosan guide with the drug-loading of 647 microg/g. Rat sciatic nerve defect model treated with FK506-releasing chitosan guide showed more mature appearance of myelinated fibers 8 weeks after surgery; furthermore, the motor functional reinnervation occurred, the amplitude and velocity of compound muscle action potentials reached 60% and 73% with respect to the normal. Thus, FK506-releasing chitosan guide should be acted as a long-lasting delivery device of immunosuppressive and neuroregenerative agent for peripheral nerve repair.
authors.affiliation: Lab of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Wei
authors.forename: Guanxiong
authors.initials: G
authors.lastname: Wang
authors.forename: Weiguo
authors.initials: W
authors.lastname: Zhang
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Ma
mesh_terms: D000818:Animals; D048271:Chitosan / Q000378:metabolism*; D016503:Drug Delivery Systems; D020104:Immunophilins / Q000494:pharmacology*; D020932:Nerve Growth Factor / Q000494:pharmacology*; D009416:Nerve Regeneration; D051381:Rats; D020127:Recovery of Function / Q000187:drug effects; D012584:Sciatic Nerve / Q000187:drug effects* / Q000293:injuries / Q000502:physiology; D016559:Tacrolimus / Q000494:pharmacology*
chemical_list: D048271:Chitosan; D020932:Nerve Growth Factor; D020104:Immunophilins; D016559:Tacrolimus