METHODS:(1) Newborn SD rats of experimental group were hypodermically injected 10% MSG(4 g/kg BW) on the postnatal lst,3rd,5th,7th,9th day.

• 方法:SD大鼠于出生后第1、3、5、7、9 d皮下注射10%25谷氨酸单钠(MSG)(4 g/kg BW),对照组同法注射等体积生理盐水,并设MSG毒性对照组,于70 d龄同法注射MSG,各组大鼠皆存活至160 d。