Objective: To observe the effect of chronic levodopa (L dopa) administration on striatal prodynorphin mRNA expression in a rat model of Parkinson disease (PD), and probe into the pathogenesis of L dopa induced dyskinesias (LID).

• 目的 :观察左旋多巴 (L dopa)治疗对帕金森病 (PD )大鼠纹状体强啡肽原表达的影响 ,探讨L dopa诱发异动症 (LID)的机制。