目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂...目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂量治疗组、高剂量治疗组。正常组给予普通饮食,其余4组给予高脂饮食,同时分别用羧甲基纤维素钠(CMC)和低、中、高剂量姜黄素进行治疗。持续治疗12周后,处死各组大鼠并进行处理分析。血清生物化学方法检测大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、甘油三酯(TG)和总胆固醇(TC)的含量;HE染色对大鼠肝组织进行病理学观察;免疫组织化学检测大鼠肝组织PPAR-γ和NF-κB p65蛋白的表达情况;RT-PCR检测PPAR-γ和NF-κB p65 m RNA的表达情况。结果治疗组(低、中、高剂量)大鼠血清中ALT、AST、TG、TC含量较模型组明显降低(P<0.05)。治疗组(低、中、高剂量)大鼠肝组织的脂肪变性程度较模型组明显减轻。与正常组比较,模型组肝组织PPAR-γm RNA及蛋白的表达水平均明显降低(P<0.05),而NF-κB p65 m RNA及蛋白的表达水平均明显升高(P<0.05)。与模型组比较,治疗组(低、中、高剂量)大鼠肝组织PPAR-γ的表达明显增加(P<0.05),PPAR-γ的表达水平以高剂量治疗组升高更加明显(P<0.01);与模型组相比,治疗组(低、中、高剂量)大鼠肝组织NF-κB p65的表达显著减少(P<0.05),NF-κB p65的表达水平以高剂量治疗组降低更加明显(P<0.01)。结论姜黄素可明显减轻高脂诱导的大鼠NAFLD肝组织的脂肪变性和炎性反应,其抗脂肪变性和抗炎的机制可能与姜黄素激活PPAR-γ的表达,从而抑制NF-κB p65的活性有关。PPAR-γ和NF-κB p65的表达参与了NAFLD的发生发展,控制这些信号分子的表达可能是姜黄素治疗NAFLD的重要机制之一。展开更多
Background:Liu-Jun-Zi decoction(LJZD),a classical nourishing formula in China,has been proven to be effective in treating chemotherapy-induced anorexia.In this study,the mechanism of LJZD in alleviating chemotherapy-i...Background:Liu-Jun-Zi decoction(LJZD),a classical nourishing formula in China,has been proven to be effective in treating chemotherapy-induced anorexia.In this study,the mechanism of LJZD in alleviating chemotherapy-induced anorexia was discussed from the aspects of regulating gut microbiota,repairing intestinal barrier injury and inhibiting inflammatory pathways.Methods:A rat model of chemotherapy-induced anorexia was established using cisplatin.The study evaluated the therapeutic effects of LJZD by observing the weight,food intake,and intestinal pathology of rats.The impact of LJZD on gut microbiota and metabolites,specifically short-chain fatty acids,was investigated through gut microbiota analysis and targeted metabolomics.The anti-inflammatory and intestinal protective effects of LJZD were assessed by examining the expression of intestinal tight junction proteins associated with the inflammatory pathway.Results:LJZD alleviated cisplatin-induced inflammation and intestinal barrier disruption,as evidenced by upregulated expression of tight junction protein 1(TJ-1)and occludin,along with reduced serum levels of interleukin 6(IL-6),interleukin-1β(IL-1β),tumor necrosis factor-α(TNF-α),and lipopolysaccharide.Additionally,LJZD alleviated microbiota imbalance and regulated the levels of short-chain fatty acids,especially increased the relative abundance of Coriobacteriales Incertae Sedis,Lactabacillus johnsonii F19785,Parasutterella,and reduced the Tyzzerella.In the hypothalamus,LJZD exerts suppressive effects on the toll-like receptor 4(TLR4)/myeloid differentiation factor 88(MyD88)/nuclear factor-κB(NF-κB)p65 signaling pathway,leading to a downregulation in the transcriptional activity of IL-6 and IL-1β,as well as Interleukin 6 receptors(IL-6R)and Interleukin-1βreceptors(IL-1R1)mRNA expression levels.Conclusion:In summary,LJZD alleviate chemotherapy-induced anorexia by modulating the gut microbiota,repairing the intestinal mechanical barriers,and suppressing the TLR4/MyD88/NF-κB p65 signaling pathway.展开更多
文摘目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂量治疗组、高剂量治疗组。正常组给予普通饮食,其余4组给予高脂饮食,同时分别用羧甲基纤维素钠(CMC)和低、中、高剂量姜黄素进行治疗。持续治疗12周后,处死各组大鼠并进行处理分析。血清生物化学方法检测大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、甘油三酯(TG)和总胆固醇(TC)的含量;HE染色对大鼠肝组织进行病理学观察;免疫组织化学检测大鼠肝组织PPAR-γ和NF-κB p65蛋白的表达情况;RT-PCR检测PPAR-γ和NF-κB p65 m RNA的表达情况。结果治疗组(低、中、高剂量)大鼠血清中ALT、AST、TG、TC含量较模型组明显降低(P<0.05)。治疗组(低、中、高剂量)大鼠肝组织的脂肪变性程度较模型组明显减轻。与正常组比较,模型组肝组织PPAR-γm RNA及蛋白的表达水平均明显降低(P<0.05),而NF-κB p65 m RNA及蛋白的表达水平均明显升高(P<0.05)。与模型组比较,治疗组(低、中、高剂量)大鼠肝组织PPAR-γ的表达明显增加(P<0.05),PPAR-γ的表达水平以高剂量治疗组升高更加明显(P<0.01);与模型组相比,治疗组(低、中、高剂量)大鼠肝组织NF-κB p65的表达显著减少(P<0.05),NF-κB p65的表达水平以高剂量治疗组降低更加明显(P<0.01)。结论姜黄素可明显减轻高脂诱导的大鼠NAFLD肝组织的脂肪变性和炎性反应,其抗脂肪变性和抗炎的机制可能与姜黄素激活PPAR-γ的表达,从而抑制NF-κB p65的活性有关。PPAR-γ和NF-κB p65的表达参与了NAFLD的发生发展,控制这些信号分子的表达可能是姜黄素治疗NAFLD的重要机制之一。
基金National Natural Science Foundation of China(grant numbers 82174143)the Innovative Team Project of Ordinary Universities in Guangdong Province(grant numbers 2022KCXTD016).
文摘Background:Liu-Jun-Zi decoction(LJZD),a classical nourishing formula in China,has been proven to be effective in treating chemotherapy-induced anorexia.In this study,the mechanism of LJZD in alleviating chemotherapy-induced anorexia was discussed from the aspects of regulating gut microbiota,repairing intestinal barrier injury and inhibiting inflammatory pathways.Methods:A rat model of chemotherapy-induced anorexia was established using cisplatin.The study evaluated the therapeutic effects of LJZD by observing the weight,food intake,and intestinal pathology of rats.The impact of LJZD on gut microbiota and metabolites,specifically short-chain fatty acids,was investigated through gut microbiota analysis and targeted metabolomics.The anti-inflammatory and intestinal protective effects of LJZD were assessed by examining the expression of intestinal tight junction proteins associated with the inflammatory pathway.Results:LJZD alleviated cisplatin-induced inflammation and intestinal barrier disruption,as evidenced by upregulated expression of tight junction protein 1(TJ-1)and occludin,along with reduced serum levels of interleukin 6(IL-6),interleukin-1β(IL-1β),tumor necrosis factor-α(TNF-α),and lipopolysaccharide.Additionally,LJZD alleviated microbiota imbalance and regulated the levels of short-chain fatty acids,especially increased the relative abundance of Coriobacteriales Incertae Sedis,Lactabacillus johnsonii F19785,Parasutterella,and reduced the Tyzzerella.In the hypothalamus,LJZD exerts suppressive effects on the toll-like receptor 4(TLR4)/myeloid differentiation factor 88(MyD88)/nuclear factor-κB(NF-κB)p65 signaling pathway,leading to a downregulation in the transcriptional activity of IL-6 and IL-1β,as well as Interleukin 6 receptors(IL-6R)and Interleukin-1βreceptors(IL-1R1)mRNA expression levels.Conclusion:In summary,LJZD alleviate chemotherapy-induced anorexia by modulating the gut microbiota,repairing the intestinal mechanical barriers,and suppressing the TLR4/MyD88/NF-κB p65 signaling pathway.