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With the average life span of humans on the rise, aging in the world has drawn considerable attentions. The monoamine neurotransmitters and neurotrophic factors in brain areas are involved in learning and memory processes and are an essential part of normal synaptic neurotransmission and plasticity. In the present study, the effect of Zhuang Jing Decoction (ZJD) on the learning and memory ability in aging rats was examined in vivo using Morris water maze. Furthermore, the levels of monoamine neurotransmitters and neurotrophic factors in brain were detected by high-performance liquid chromatography with a fluorescence detector and enzyme-linked immunosorbent assay, respectively. These data showed that oral administration with ZJD at the dose of 30 g·kg(-1) exerted an improved effect on learning and memory ability in aging rats. The results revealed that ZJD could effectively adjust the monoamine neurotransmitters and neurotrophic factors, restore the balance of the level of monoamine neurotransmitters and neurotrophic factors in brain, and finally attenuate the degeneration of learning and memory ability. These findings suggested that ZJD might be a potential agent as cognitive-enhancing drug in improving learning and memory ability. It may exert through regulating the levels of monoamine neurotransmitters and neurotrophic factors in brain, which demonstrated that ZJD had certain antiaging effects.

Effect of Zhuang Jing Decoction on Learning and Memory Ability in Aging Rats