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Preventive Effect of Morinda citrifolia Fruit Juice on Neuronal Damage Induced by Focal Ischemia

It is known that the fruit juice of Morinda citrifolia (M. citrifolia, Noni, Rubiaceae) has various pharmaco-logical effects such as antioxidant or anti-inflammatory activities, which may help the inhibition of ischemic neu-ronal damage. Here, we examined the effect of the fruit juice of M. citrifolia (Noni juice) on the brain damage caused by ischemic stress in mice. Noni juice was obtained from the mature fruit grown in Okinawa (about 1.5 l/4 kg of fruit; 100% Okinawa Noni juice (ONJ). Male ddY mice were supplied with 3% or 10% juice in the drink-ing water for 7 d, and compared to the control group. On the 7th day, mice were subjected to 2 h of middle cere-bral artery occlusion (MCAO). Interestingly, the intake of juice reduced the infarct volume as analyzed by 2,3,5 triphenyltetrazolium chloride (TTC) staining on the 3rd day of MCAO when compared to the control group. Furthermore, we found that the neurological deficit scores (NDS) were decreased after the reperfusion in the juice-supplied mice. On the other hand, the intake of juice did not affect the expression levels of antioxidant such as Cu/Zn superoxide dismutase. The present study suggests that Noni juice may have a preventive effect against cerebral ischemic stress, while further studies are needed to explain the detailed mechanism.

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