基于UPLC-Q-TOF-MS分析何首乌提取物体内外成分

阐明何首乌Polygonum multiflorum体内药源性成分。该研究首次以靶器官肝脏中的药源性成分为研究对象,基于UPLC-Q-TOF-MS技术和Targeted-MS-MS模式,采用安捷伦Mass Hunter,Metabolite ID数据处理软件对保留时间、精确相对分子质量、一级、二级质谱信息进行分析并结合标准品和参考文献比对,从中鉴定出5个原型成分、6个代谢产物。此外,该研究还对何首乌给药后大鼠血浆和提取物中的药源性成分进行了分析,从血浆中推出鉴定8个原型成分、19个代谢产物,从何首乌提取物中鉴定出30个化合物。其中大黄素氧化乙酰化、羟化甲基化、葡萄糖醛酸化氧化、羧基化葡萄糖醛酸化和决明柯酮葡萄糖醛酸化代谢产物为首次报道。通过何首乌体内外成分之间的比对分析,初步明确了肝脏中的药源性成分和提取物-血液-肝脏之间成分的传递和转化规律,同时也进一步深化了对何首乌体内药源性成分的认识。

鱼腥草破壁饮片抗细菌内毒素作用研究

目的考察鱼腥草破壁饮片抗内毒素(LPS)作用,并与传统饮片作用进行比较。方法采用BALB/c小鼠鼻滴LPS建立肺部炎症模型,检测血液中炎症细胞数和病理学观察肺组织炎症程度;采用尾iv内毒素致大鼠炎症模型,检测血液中白细胞数和血浆中LPS含量,酶联免疫法(ELISA)检测血清中炎症因子IL-1β、IL-6、TNF-α含量;采用鲎试剂试验法,观察鱼腥草破壁饮片提取物体外抗细菌内毒素作用。结果鱼腥草破壁饮片和传统饮片均可不同程度降低BALB/c小鼠全血中白细胞含量,减轻肺组织病理炎症细胞浸润,且破壁饮片呈明显的剂量依赖关系;鱼腥草破壁饮片与传统饮片均可不同程度显著降低大鼠全血中白细胞、血浆中内毒素和血清中IL-6、IL-1β和TNF-α含量;与传统饮片比较,鱼腥草破壁饮片可明显降低血清中IL-1β、TNF-α含量;相同剂量或相同稀释比例下,鱼腥草破壁饮片体外抗细菌内毒素作用均显著强于鱼腥草传统饮片。结论鱼腥草破壁饮片具有良好的抗内毒素作用,且在一定程度上优于鱼腥草传统饮片。

Dendrobium nobile protects against ovalbumin-induced allergic rhinitis by regulating intestinal flora and suppressing lung inflammation

Antibiotic exposure-induced dysbiosis of the intestinal flora increases the risk of developing allergic rhinitis.Hence,regulating the balance of intestinal flora may be useful for preventing and treating allergic rhinitis.However,the underlying mechanism is unclear.Dendrobium nobile(Shihu)exhibits anti-inflammatory and immune activities.Hence,in this study,we investigated the mechanism via which Shihu may improve allergic rhinitis.Mouse models of allergic rhinitis with intestinal flora dysbiosis(Model-D,antibiotics induce intestinal flora dysbiosis with ovalbumin-induced allergy)and normal intestinal flora with allergic rhinitis(Model-N,ovalbumin-induced allergy)were established.The effect of Shihu on intestinal flora and inflammation caused during allergic rhinitis were analyzed.Allergic symptoms,infiltration of hematoxylin and eosin in the lungs and nose,and the release of various factors[interleukin(IL)-2,IL-4,IFN-y,IL-6,IL-10,and IL-17]in the lungs were evaluated.The results indicate that intestinal flora dysbiosis exacerbated lung and nose inflammation in allergic rhinitis.However,treatment with the Shihu extract effectively reversed these symp-toms.Besides,the Shihu extract inhibited the PI3K/AXT/mTOR pathway and increased the level of Forkhead box protein in the lungs.Additionally,the Shihu extract reversed intestinal flora dysbiosis at the phylum and genus levels and improved regulator T cell differentiation.Furthermore,in the Model-D group,the Shihu extract inhibited the decrease in the diversity and abundance of the intestinal flora.Screening was performed to determine which intestinal flora was positively correlated with Treg differentiation using Spearman5 s correlation analysis.In conclusion,we showed that Shihu extract restored the balance in intestinal flora and ameliorated inflammation in the lungs of allergic rhinitis mice and predicted a therapeutic new approach using Traditional Chinese Medicine to improve allergic rhinitis.

基于应激颗粒的中药神经保护研究设想

应激颗粒是存在于胞质的一种无膜致密颗粒,通过包裹mRNA、转录起始因子、RNA结合蛋白等翻译起始阶段的重要元件,使细胞在遭受不利刺激时出现短暂的蛋白翻译阻滞,从而起到细胞保护作用。研究发现,应激颗粒广泛分布于海马和皮层的神经元细胞、星形胶质细胞、小胶质细胞和浦肯野细胞等神经细胞中,生物过程涉及蛋白异常聚集、突触的成熟和可塑性、免疫调节、抗氧化应激反应、抑制细胞凋亡等,在急性缺血性脑卒中和神经退行性疾病的发生发展中发挥着重要作用。尤其是其多样化的物质组成和广泛参与的生物过程,为中医证候生物学及“同病异治”“整体调节”等中医药传统理论和治法的研究提供了崭新的思路和视野。对应激颗粒的基本特征、神经保护及研究方法等进行系统的梳理,同时以急性缺血性脑卒中为范例,尝试将应激颗粒这一现代生物学现象纳入到中医药现代研究中,提出研究设想和思路,以期用科学的语言阐释传统中医药相关理论与治法,也为行业同仁的相关研究提供参考。