Glial restricted precursor cell transplant with cyclic adenosine monophosphate improved some autonomic functions but resulted in a reduced graft size after spinal cord contusion injury in rats

► GRP cells survived, differentiated, and formed extensive transplants. ► GRP cells and cAMP had modest positive effects on micturitions and erections. ► cAMP reduced the graft size throughout the lesion region and at the lesion center. ► Serotonin immediately caudal to the lesion was reduced in the cAMP groups.