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Background  Currently, food supplements to improve age-related dementia are required. Therefore, we aimed to determine the effect of the combined extract of  Cyperus rotundus  and  Zingiber officinale  (CP1) on the improvement of age-related dementia in rats with AF64A-induced memory deficits.    Methods  Male Wistar rats weighing 180-200 g were orally given CP1 at doses of 100, 200 and 300 mg.kg -1  BW for a period of 14 days after bilateral intracerebroventricular administration of AF64A. Spatial memory was assessed in all rats every 7 days throughout the 14 day-experimental period. At the end of the study, neuronal density, acetylcholinesterase (AChE) activity, oxidative stress status and the activation of MAPK cascades in the hippocampus were determined.    Results  Enhanced memory, increased neuronal density, decreased AChE activity and decreased oxidative stress status together with activated pERK1/2 were observed in the hippocampus of CP1-treated rats. These results suggested that CP1 might improve memory via enhanced cholinergic function and decreased neurodegeneration and oxidative stress.    Conclusions  CP1 is a potential novel food supplement for dementia. However, further investigations on the subchronic toxicity of CP1 and drug interactions are required.    Electronic supplementary material  The online version of this article (doi:10.1186/s12906-017-1632-4) contains supplementary material, which is available to authorized users.

Neuroprotective and cognitive-enhancing effects of the combined extract of Cyperus rotundus and Zingiber officinale