And rats of L-NNA+lovastatin-treated group were intraperitonealy injected with L-NNA at dose of 20 mg/kg daily for 3 d in the first three day of lovastatin injection.

• L-NNA+洛伐他汀处理组大鼠在注射洛伐他汀前3天加L-NNA(20mg/kg)腹腔注射，每天1次，连续3天。