Methods:24 Wistar rats were divided into four groups,namely 2,3 butanedion monoxime (BDM) pretreated group (A),bFGF positive treated group(B),normal saline group (C),and shamoperated controls (D).

• 方法：24 只大鼠分成内源性bFGF激活A 组、bFGF治疗B组、生理盐水对照治疗C组以及正常对照D组。