The experiment was conducted on the actions of 5 kinds of reagents on HL - 60 cellular wither

viz. Yisuiling chloroform extract

rabbit serum chloroform extract

rabbit liver paste chloroform extract

Etoposide

and normal rabbit serum. Results revealed that after fluid incubation for a short period

the HL-60 cultured cells showed no wither in the former 4 groups under microscope and flowing cytometer. Among them

action was strongest in rabbit liver paste of Yisuiling extract group

similar to the positive control of Etoposide. Followed by rabbit serum

and the action was weak in Yisuiling chloroform extract. There was no obvious action of induced wither by normal rabbit serum. The mechanism of induced wither is still under investigation.