Purdue University researchers have developed a method of using nanoparticles coated with a polymer, polyethylene glycol (PEG) to deliver treatments to injured brain and spinal cord cells by sealing the injured area, reducing further damage.

In another study, the researchers added both PEG and hydralazine, an antihypertension drug, to mesoporous silica nanoparticles, which have pores that can hold the drug, which is later delivered to the damaged cells. The hydralazine fights off secondary cell damage that occurs after the initial injury.