Growth and elongation of axons through mechanical tension mediated by fluorescent-magnetic bifunctional Fe3O4·Rhodamine 6G@PDA superparticles

Journal of Nanobiotechnology

Yang Wang¹  Jingyan Ren¹  Laijin Lu¹  Jiayi Zhang¹  Ting Liu²  Hao Xu³  Hao Zhang⁴  Shulin Du⁴  Binxi Li⁴  Yi Liu⁴ 

[1] Department of Hand Surgery, The First Hospital of Jilin University, 130021, Changchun, Jilin, People’s Republic of China;Departments of Geriatrics, The First Hospital of Jilin University, 130021, Changchun, Jilin, People’s Republic of China;Institute of Translational Medicine, The First Hospital of Jilin University, 130021, Changchun, Jilin, People’s Republic of China;State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, Jilin, People’s Republic of China;

关键词: FeO superparticles;    Magnetic nanoparticles;    Magnetic field;    Mechanical forces;    Magnetic actuation;    Axon regeneration;    Gene expression profile;   

DOI  :  10.1186/s12951-020-00621-6

来源: Springer

【 摘 要 】

BackgroundThe primary strategy to repair peripheral nerve injuries is to bridge the lesions by promoting axon regeneration. Thus, the ability to direct and manipulate neuronal cell axon regeneration has been one of the top priorities in the field of neuroscience. A recent innovative approach for remotely guiding neuronal regeneration is to incorporate magnetic nanoparticles (MNPs) into cells and transfer the resulting MNP-loaded cells into a magnetically sensitive environment to respond to an external magnetic field. To realize this intention, the synthesis and preparation of ideal MNPs is an important challenge to overcome.ResultsIn this study, we designed and prepared novel fluorescent-magnetic bifunctional Fe3O4·Rhodamine 6G@polydopamine superparticles (FMSPs) as neural regeneration therapeutics. With the help of their excellent biocompatibility and ability to interact with neural cells, our in-house fabricated FMSPs can be endocytosed into cells, transported along the axons, and then aggregated in the growth cones. As a result, the mechanical forces generated by FMSPs can promote the growth and elongation of axons and stimulate gene expression associated with neuron growth under external magnetic fields.ConclusionsOur work demonstrates that FMSPs can be used as a novel stimulator to promote noninvasive neural regeneration through cell magnetic actuation.

【 授权许可】

CC BY