Abstract
Kochiae Fructus (KF) was listed as ‘top grade’ medicinal material by the ‘Shennong's Herbal Classic of Materia Medica’ and has been used in traditional Chinese medicine to delay aging and treat inflammation, such as rubella, eczema, cutaneous pruritus, etc. Our research focused on the antioxidant capability of water decoction and fractions from KF based on 2,2-iphenyl-1-picrylhydrazyl (DPPH) free radical and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) cation radical scavenging assay, the ferric reducing antioxidant power assay, and inhibitory effects on DNA and protein oxidative damage. The results of total phenolics and flavonoids contents showed that ethyl acetate fraction (EAF) possessed the highest phenolics and flavonoids with values of 112.90 ± 9.58 mg gallic acid equivalents/g and 329.60 ± 20.93 mg rutin equivalents/g, respectively. At the same time, the results of antioxidant capacities showed that EAF possessed best antioxidant abilities. In addition, in this work, we evaluated the oral safety of the water decoction of KF (KFWD) via the 14-day acute and 28-day subacute toxicity tests. The results of in vivo toxicity assessment showed that KFWD did not cause significant changes in the general clinical symptoms, hematology and biochemical parameters, organ weights, or histopathological appearances in mice or rats. In summary, the reason why KF has the traditional effect on delaying aging may be related to the fact that its rich in flavonoids and phenolics. Simultaneously, no toxicity was detected after acute or subacute treatment of KFWD, providing valuable evidence for the traditional safe use of KF.
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