• RegeneRx Biopharmaceuticals Inc., of Rockville, Md., said researchers have shown that Thymosin beta 4 provided both neuroprotection and neurorestoration in a rat model of traumatic brain injury. Compared with placebo, the drug, initiated six hours post-injury, statistically significantly improved sensorimotor functional recovery and spatial learning, reduced cortical lesion volume and hippocampal cell loss.