A self-assembly peptide nanofibrous scaffold reduces inflammatory response and promotes functional recovery in a mouse model of intracerebral hemorrhage

Self-assembly peptide nanofibrous scaffold (SAPNS), such as RADA16-I, has been shown to reduce acute brain injury and enhance functional recovery in rat intracerebral hemorrhage (ICH) models. The acidic property of RADA16-I, however, limits its application in patients. In the present study, by using a modified neutral SAPNS (the RADA16mix) in collagenase IV induced ICH mice, we detected there were less microglial and apoptotic cells in mice injected with RADA16mix, meanwhile, more cells survived in this group. In addition, behavioral tests indicated that mice treated with RADA16mix showed better functional recovery than RADA16-I. Local delivery of RADA16mix reduces acute brain injury by lowering the number of apoptotic cells, decreasing glial reaction, reducing inflammatory response and, therefore promotes functional recovery. Moreover, new nerve fibers have grown into this new SAPNS, which indicates RADA16mix is able to serve as a bridge for nerve fibers to grow through.From the Clinical EditorAcute brain injury, such as intracerebral hemorrhage is a serious problem. In this work, self-assembly peptide nanofibrous scaffold (SAPNS) were tested in a rat model to aid functional recovery. Several items have been considered, such as histology, brain water content, hematoma volume, cell death and survival, inflammatory response, and nerve fiber growth. The positive data generated should pave the way towards better treatment options.

Intracranial injection of collagenase IV caused acute brain injury. In order to access whether local delivery of this new synthetic neutral self-assembly peptide nanofibrous scaffold called RADA16mix could lessen such kind of injury or not, several items has been estimated as follows: histology, brain water content, hematoma volume, cell death and survival, inflammatory response, nerve fiber growth and functional recovery.Figure optionsDownload high-quality image (176 K)Download as PowerPoint slide