Abstract To observe the effect of exogenous high molecular weight nerve growth factor (HMW-NGF) mixed with bletilia striata gelatin (BSG) in the promotion of healing, the experiment was performed as follow: (1) In serumfree medium, the normal saline, BSG, HMWNGF, and BSG+HMW-NGF were added separately, and then, the chick embryo root ganglions (DRGs) were cultivated in the above prepared media and the axonal growth was observed. (2) 40 SD rats were divided into 4 groups. A wound of 2cm×2cm was made on the back of every rat. No treatment was given in group one. In other groups, BSG, HMW-NGF, andBSG+HMW-NGF were given separately to the wounds once daily. After 3 and 10 days, the wound area of every rat was measured, cells in the wounds were observed under light microscope and were calculated, and the time of healing was recorded. The results showed that BSG, HMW-NGF, especially BSG+HMW-NGF could promote wound healing.
