Effects of Berberine on L-DOPA Therapy in 6-Hydroxydopamine-induced Rat Models of Parkinsonism

Berberine이 백서의 6-Hydroxydopamine-유도 파킨슨병 모델에서의 L-DOPA 요법에 미치는 영향

  • Received : 2011.10.06
  • Accepted : 2011.11.30
  • Published : 2011.12.31

Abstract

Isoquinoline compounds including berberine enhance L-DOPA-induced cytotoxicity in PC12 cells. In this study, the effects of berberine on L-DOPA therapy in unilateral 6-hydroxydopamine (6-OHDA)-induced rat models of parkinsonism were investigated. Rats were prepared for the models of Parkinson's disease by 6-OHDA-lesioning for 14 days and then treated with L-DOPA (10 mg/kg) with or without berberine (5 and 30 mg/kg, i.p.) for 21 days. Treatment with berberine (5 and 30 mg/kg, i.p.) showed a dopaminergic cell loss in substantia nigra of 6-OHDA-lesioned rats treated with L-DOPA: 30 mg/kg berberine was more intensive neurotoxic. The levels of dopamine were also decreased by berberine (5 and 30 mg/ kg) in striatum-substantia nigra of 6-OHDA-lesioned rats treated with L-DOPA. These results suggest that berberine aggravates cell death of dopaminergic neurons in L-DOPA-treated 6-OHDA-lesioned rat models of Parkinson's disease. Therefore, the long-term L-DOPA therapeutic patients with isoquinoline compounds including berberine may need to be checked for the adverse symptoms.

Keywords

References

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