Hyaluronic acid hydrogel modified with nogo-66 receptor antibody and poly-L-lysine to promote axon regrowth after spinal cord injury.
The biomaterials used for central nervous system injury require not only interacting with specific cell adhesion but also specific growth factor receptors to promote nerve regeneration. In this study, hyaluronic acid (HA)-based hydrogels modified with poly-L-lysine (PLL) and nogo-66 receptor antibody (antiNgR) (HA-PLL/antiNgR) were administered to rats after lateral hemisection of the spinal cord. Anti-neurofilament positive axons were found to extend into the HA-PLL/antiNgR hydrogel at 8 weeks after implantation, which shows significant difference compared with HA-PLL or blank control group. Electron micrographs of implanted hydrogels showed that there were more cells and normal axons with myelin in the HA-PLL/antiNgR implant than that of HA-PLL hydrogel. The antiNgR grafted on HA hydrogels could be detected for 8 weeks after transplantation in vivo. All of these properties may facilitate HA-PLL/antiNgR hydrogels to become a promising scaffold for repairing spinal cord injury. Nevertheless, both two kinds of modified hydrogels (HA-PLL/antiNgR and HA-PLL) showed remarkable advantages in supporting angiogenesis, and simultaneously inhibiting the formation of glial scar.
Wei
Yue-Teng
YT
Department of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.
He
Yu
Y
Xu
Chang-Lei
CL
Wang
Ying
Y
Liu
Bing-Fang
BF
Wang
Xiu-Mei
XM
Sun
Xiao-Dan
XD
Cui
Fu-Zhai
FZ
Xu
Qun-Yuan
QY
D000818:Animals; D000906:Antibodies / Q000627:therapeutic use*; D001369:Axons / Q000187:drug effects / Q000502:physiology*; D058851:GPI-Linked Proteins; D006820:Hyaluronic Acid / Q000627:therapeutic use*; D020100:Hydrogels / Q000008:administration & dosage / Q000737:chemistry* / Q000627:therapeutic use; D020007:Implants, Experimental; D009185:Myelin Proteins; D018919:Neovascularization, Physiologic / Q000187:drug effects; D009416:Nerve Regeneration / Q000187:drug effects; D000070816:Nogo Receptor 1; D011107:Polylysine / Q000627:therapeutic use*; D051381:Rats; D011956:Receptors, Cell Surface; D018000:Receptors, Peptide / Q000276:immunology*; D013119:Spinal Cord Injuries / Q000628:therapy*; D054457:Tissue Scaffolds / Q000737:chemistry
D000906:Antibodies; D058851:GPI-Linked Proteins; D020100:Hydrogels; D009185:Myelin Proteins; D000070816:Nogo Receptor 1; D011956:Receptors, Cell Surface; D018000:Receptors, Peptide; C486581:Rtn4r protein, rat; D011107:Polylysine; D006820:Hyaluronic Acid