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Duoduo Zhang,Shaoping Nie,Mingyong Xie,Jielun Hu 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.1
There is growing interest in the antioxidants and antibacterial activity from natural substances. The purpose of the research was to gain and distinguish phenolic substances and organic acids in the Camellia oleifera cake, and to study their antioxidant and antibacterial activities. The extraction and purification of them were achieved by solvent extraction and column separation, respectively. The conclusions displayed that purity of the phenolic substances was 94.1 ± 0.5% w/w and that of organic acid was 96.0 ± 0.3% w/w; Fifteen phenolic substances were certificated using HPLC–ESI–MS technology; oxalic, citric, acetic, malic, and succinic acids are discovered to be main organic acids. In addition, the phenolic substances and organic acids both have good antioxidant activity and obvious inhibition against six species of bacteria. These conclusions can be useful in the reuse of the waste of Camellia oleifera oil industry in the future.
Yuli Han,Xuewang Li,Liu Yang,Duoduo Zhang,Lan Li,Xianan Dong,Yan Li,Sen Qun,Weizu Li 고려인삼학회 2022 Journal of Ginseng Research Vol.46 No.4
Background: The incidence of ischemic cerebrovascular disease is increasing in recent years and has beenone of the leading causes of neurological dysfunction and death. Ginsenoside Rg1 has been found toprotect against neuronal damage in many neurodegenerative diseases. However, the effect and mechanismby which Rg1 protects against cerebral ischemia-reperfusion injury (CIRI) are not fully understood. Here, we report the neuroprotective effects of Rg1 treatment on CIRI and its possible mechanisms inmice. Methods: A bilateral common carotid artery ligation was used to establish a chronic CIRI model in mice. HT22 cells were treated with Rg1 after OGD/R to study its effect on [Ca2þ]i. The open-field test and poleclimbingexperiment were used to detect behavioral injury. The laser speckle blood flowmeter was usedto measure brain blood flow. The Nissl and H&E staining were used to examine the neuronal damage. TheWestern blotting was used to examine MAP2, PSD95, Tau, p-Tau, NOX2, PLC, p-PLC, CN, NFAT1, and NLRP1expression. Calcium imaging was used to test the level of [Ca2þ]i. Results: Rg1 treatment significantly improved cerebral blood flow, locomotion, and limb coordination,reduced ROS production, increased MAP2 and PSD95 expression, and decreased p-Tau, NOX2, p-PLC, CN,NFAT1, and NLRP1 expression. Calcium imaging results showed that Rg1 could inhibit calcium overloadand resist the imbalance of calcium homeostasis after OGD/R in HT22 cells. Conclusion: Rg1 plays a neuroprotective role in attenuating CIRI by inhibiting oxidative stress, calciumoverload, and neuroinflammation.