The aim of this experiment was to investigate the ameliorative effect and molecular mechanism of tilapia head glycolipid(TH-GL)on indomethacin(IDM)-induced gastric ulcer in male Sprague Dawley(SD)rats.The gastric ulce...The aim of this experiment was to investigate the ameliorative effect and molecular mechanism of tilapia head glycolipid(TH-GL)on indomethacin(IDM)-induced gastric ulcer in male Sprague Dawley(SD)rats.The gastric ulcer model was established by oral administration of 30mgkg^(-1) IDM after 7 days of TH-GL or omeprazole(OME)administration in rats.Then the macroscopic gastric injury symptoms,gastric mucosa protective factor cyclooxygenase 1(COX-1),cyclooxygenase 2(COX-2),prostaglandin E_(2)(PGE_(2)),the levels of oxidative stress,and inflammatory cytokine expression levels in the rats were analyzed.The experimental results showed that multiple ulcers appeared on the gastric surface of the rats in the model group.Compared to the model group,TH-GL significantly alleviated gastric ulcers and reduced the gastric damage index in rats.In addition,TH-GL significantly promoted the expression of constitutive enzyme COX-1 while inhibited the expression of inducible enzyme COX-2,and make PGE2 maintain at normal levels.TH-GL also inhibited oxidative stress and inflammatory responses,increased superoxide dismutase(SOD)activity and glutathione(GSH)content,decreased the level of malondialdehyde(MDA)and the content of pro-inflammatory factor.In conclusion,these results suggested that TH-GL could maintain the expression levels of COX-1 and PGE2 while inhibit the expression of COX-2 in the gastric of rat and then prevent IDM-induced gastric ulcer,which may be related to the regulation of oxidative stress and inflammatory response.Therefore,TH-GL might be a new option for the prevention of gastric diseases induced by IDM.展开更多
目的:探讨罗非鱼头长链碱(tilapia head long chain bases,TH-LCB)的提取纯化方法及其体外抗肿瘤活性。方法:以罗非鱼头为原料,采用有机溶剂提取法,提取纯化得到TH-LCB;采用四甲基偶氮唑盐法、细胞凋亡率和细胞周期的测定和蛋白免疫印...目的:探讨罗非鱼头长链碱(tilapia head long chain bases,TH-LCB)的提取纯化方法及其体外抗肿瘤活性。方法:以罗非鱼头为原料,采用有机溶剂提取法,提取纯化得到TH-LCB;采用四甲基偶氮唑盐法、细胞凋亡率和细胞周期的测定和蛋白免疫印迹等方法,探讨了TH-LCB对人白血病K562细胞的增殖抑制作用和凋亡诱导作用。结果:TH-LCB可显著抑制人K562细胞的增殖,TH-LCB作用24、48 h后的半数抑制浓度分别为42.207、39.494μg/m L;随着TH-LCB质量浓度的增加,细胞凋亡率逐渐增加,sub-G0/G1峰(凋亡峰)也随之升高,表明TH-LCB通过诱导细胞凋亡来抑制K562细胞增殖;Western blot结果表明,TH-LCB可提高细胞内Caspase-3的蛋白表达量,呈剂量依赖效应。结论:TH-LCB可通过诱导K562细胞凋亡抑制其增殖,这一过程可能与Caspase-3的激活有关。展开更多
基金supported by the National Key R&D Pro-grams of China(No.2018YFD0901103)the Hainan Provincial Natural Science Foundation of China(No.2019 RC093).
文摘The aim of this experiment was to investigate the ameliorative effect and molecular mechanism of tilapia head glycolipid(TH-GL)on indomethacin(IDM)-induced gastric ulcer in male Sprague Dawley(SD)rats.The gastric ulcer model was established by oral administration of 30mgkg^(-1) IDM after 7 days of TH-GL or omeprazole(OME)administration in rats.Then the macroscopic gastric injury symptoms,gastric mucosa protective factor cyclooxygenase 1(COX-1),cyclooxygenase 2(COX-2),prostaglandin E_(2)(PGE_(2)),the levels of oxidative stress,and inflammatory cytokine expression levels in the rats were analyzed.The experimental results showed that multiple ulcers appeared on the gastric surface of the rats in the model group.Compared to the model group,TH-GL significantly alleviated gastric ulcers and reduced the gastric damage index in rats.In addition,TH-GL significantly promoted the expression of constitutive enzyme COX-1 while inhibited the expression of inducible enzyme COX-2,and make PGE2 maintain at normal levels.TH-GL also inhibited oxidative stress and inflammatory responses,increased superoxide dismutase(SOD)activity and glutathione(GSH)content,decreased the level of malondialdehyde(MDA)and the content of pro-inflammatory factor.In conclusion,these results suggested that TH-GL could maintain the expression levels of COX-1 and PGE2 while inhibit the expression of COX-2 in the gastric of rat and then prevent IDM-induced gastric ulcer,which may be related to the regulation of oxidative stress and inflammatory response.Therefore,TH-GL might be a new option for the prevention of gastric diseases induced by IDM.
文摘目的:探讨罗非鱼头长链碱(tilapia head long chain bases,TH-LCB)的提取纯化方法及其体外抗肿瘤活性。方法:以罗非鱼头为原料,采用有机溶剂提取法,提取纯化得到TH-LCB;采用四甲基偶氮唑盐法、细胞凋亡率和细胞周期的测定和蛋白免疫印迹等方法,探讨了TH-LCB对人白血病K562细胞的增殖抑制作用和凋亡诱导作用。结果:TH-LCB可显著抑制人K562细胞的增殖,TH-LCB作用24、48 h后的半数抑制浓度分别为42.207、39.494μg/m L;随着TH-LCB质量浓度的增加,细胞凋亡率逐渐增加,sub-G0/G1峰(凋亡峰)也随之升高,表明TH-LCB通过诱导细胞凋亡来抑制K562细胞增殖;Western blot结果表明,TH-LCB可提高细胞内Caspase-3的蛋白表达量,呈剂量依赖效应。结论:TH-LCB可通过诱导K562细胞凋亡抑制其增殖,这一过程可能与Caspase-3的激活有关。
