Objective To study the promotive effect of SCs on neurons in vitro Methods SCs feeder layer was made as conditioned medium(SCM), then used in coculture with neurons respectively. Count the survived neurites of the cultured cell and observe the cell size by a medical image analyzer. Results The number of surviving cells, neurites outgrowth and cell size cocultured either with SCs feeder layer or SCM was markedly increased than that of control cultures(P