Dihuang-Yinzi decoction improves cognition and energy metabolism of alzheimer mice / 国际中医中药杂志

ABSTRACT

Objective To investigate the effects of Dihuang-Yinzi on cognition and energy metabolism of AD (Alzheimer’s disease) mice. Methods 60 Male APPsw/PS1ΔE9 mice were divided into 5 groups model, positive drug (Aricept), high, medium and low dosage of Dihuang-Yinzi. C57BL/6J mice with same age were served as normal control. All groups were orally administrated for 150 days. The spatial memory and passive avoidance were measured. The energy charge, activity of complex I, II and IV of respiratory chain, enzymatic activity of ATPase and mitochondrial membrane potential were assayed. Results APPsw/PS1ΔE9 mice showed significant impairments in cognition and energy production [(0.39±0.02),(3.28± 0.37)μOD/(min?μg),(0.19±0.04)mOD/(min?μg),(0.26±0.03)mOD/(min?μg),(0.19±0.02),(0.30±0.03)、(3.49±0.73)]with compaired to normal control[(0.57±0.06),(8.74±1.57)μOD/(min?μg),(0.43± 0.02)mOD/(min?μg),(0.69±0.02)mOD/(min?μg),(0.65±0.02),(0.51±0.01),(7.41±1.28)]. Dihuang-Yinzi ameliorates cognition decline, promotes acitivity of energy production related enyzmes, and restores mitochondrial membrane potential in AD mice[(0.57 ± 0.07),(8.42 ± 1.74)μOD/(min ?μg),(0.64 ± 0.03)mOD/(min?μg),(0.68±0.04),(0.55±0.01),(6.69±1.03), P<0.01 or 0.05]. Conclusion Dihuang-Yinzi could improve cognition and energy metabolism of APPsw/PS1ΔE9 mice by protecting mitochondria from pathologic injury.