姜黄素对肺炎支原体感染肺炎幼鼠抗炎作用及机制初步探讨

目的基于NF-κB途径探讨姜黄素对肺炎支原体感染肺炎幼鼠抗炎作用及机制初步探讨。方法选取50只SPF级BALB/c小鼠随机分为五组,分别为空白对照组(A组)、模型组(B组)、姜黄素高剂量组(C组),姜黄素中剂量组(D组)和姜黄素低剂量组(E组),模型组及姜黄素治疗组采用肺炎支原体标准株滴鼻法进行建模,HE染色观察肺脏病理组织学变化;免疫组化染色测定肺组织中NF-κB p65阳性细胞的积分光密度;采用Western blot实验检测肺组织中NF-κB p65蛋白表达变化;使用ELISA法检测IL-6、IL-8和TNF-α水平。结果模型组小鼠肺组织病理改变明显,姜黄素高剂量组小鼠肺组织与模型组相比,小鼠肺泡结构比较完整,肺泡与气管结构清晰,炎细胞明显减少,姜黄素中剂量组对小鼠有一定的治疗效果,姜黄素低剂量组小鼠和模型组小鼠比较并无明显差异;与空白对照组相比,模型组小鼠肺组织中NF-κB p65的IOD值、NF-κB p65蛋白表达和支气管灌洗液中IL-6、IL-8和TNF-α表达明显升高(P<0.01),与模型组小鼠相比,姜黄素高剂量组和姜黄素中剂量组小鼠肺组织中NF-κB p65的IOD值、NF-κB p65蛋白表达和支气管灌洗液中IL-6、IL-8和TNF-α表达明显降低(P<0.01)。与模型组小鼠相比,姜黄素低剂量组与模型组小鼠肺组织中NF-κB p65的IOD值、NF-κB p65蛋白表达和支气管灌洗液中IL-6、IL-8和TNF-α表达相比差异无统计学意义(P>0.05)。结论姜黄素可改善肺炎支原体感染幼鼠症状且能够抑制炎症因子,其机制可能是通过抑制NF-κB通路的激活,表明姜黄素可作为治疗肺炎支原体感染的潜在药物。     

从细胞外信号调节激酶-1mRNA在肝纤维化大鼠肝组织中的表达来探讨姜黄素的治疗作用

目的:探讨ERK-1mRNA在CCl4致实验性肝纤维化大鼠肝组织中的表达及姜黄素(curcumin)对它们的影响。方法:建立CCl4诱导的大鼠实验性肝纤维化的模型,用免疫组化法比较正常组、模型组以及姜黄素组大鼠的α-平滑肌肌动蛋白(α-smooth muscle action,α-SMA)的表达,用RT-PCR法比较各组大鼠肝组织胞外信号调节激酶-1(Extracellular-regulated kinase-1,ERK-1)的表达。结果:模型组大鼠α-SMA以及ERK-1mRNA的表达增高明显,而姜黄素组则较模型组低。结论:姜黄素可能通过抑制α-SMA的表达,抑制ERK-1的促肝星状细胞(hepatic stellate cell,HSC)的增殖作用,从而产生抗四氯化碳诱导的大鼠肝纤维化的作用。     

姜黄素逆转结直肠癌化疗耐药的药理作用机制研究进展

结直肠癌是世界上第3大常见癌症,化疗贯穿整个治疗过程,但其耐药的发生成为癌症死亡和复发的主要原因,亟需寻找辅助化疗药治疗的药物增加其疗效。姜黄素是美国国立肿瘤学会所承认的广谱抗癌药物,其作用机制是通过调控相关蛋白表达、上皮间充质转化分子标志物、结直肠癌干细胞识别标志物、相关信号通路、自噬和相关因子。综述姜黄素逆转逆转结直肠癌化疗耐药的机制,旨在为科研探索和临床治疗、预防提供更好的研究思路和应用价值。     

Effects of free and nanoparticulate curcumin on chemically induced liver carcinoma in an animal model

IntroductionCurcumin therapeutic applications are constrained by its prominent metabolic instability as well as inadequate absorption and bioavailability. The current study was designed to enhance the curcumin bioavailability by exploiting nanoparticles.Material and methodsEleven groups of mice were divided into: normal and nanoparticle control groups, a hepatocellular carcinoma (HCC) group induced by diethylnitrosamine (DEN), 2 groups treated with DEN plus a high dose/low dose of free curcumin, 2 groups treated with a high dose/low dose of free curcumin, 2 groups treated with DEN plus a high dose/low dose of nanoparticulate curcumin, and 2 groups treated with a high dose/low dose of nanoparticulate curcumin.ResultsDEN administration significantly increased liver enzymes, vascular endothelial growth factor, tumor necrosis factor-α, α-fetoprotein, malondialdehyde, and nucelar factor-κB. Also, it decreased serum albumin and tissue antioxidant activities and caused severe histological changes in hepatic tissue. Oral treatment of DEN-injected mice with either a high dose of free curcumin or the tested doses of nanoparticulate curcumin resulted in a significant improvement of all the tested parameters.ConclusionsAlthough the two tested doses of nanoparticulate curcumin were much lower than free curcumin, both doses were effective in preventing HCC development while the low dose of free curcumin was hardly effective. Hence, we conclude that nanoparticles enhance the bioavailability of curcumin.     

从生物信息与网络药理角度认识姜黄素治疗膝骨关节炎的分子机制

背景:姜黄素是由中药姜黄中提取的一种植物多酚,可用于治疗膝骨关节炎,但具体机制尚不清楚。目的:基于生物信息学和网络药理学初步分析姜黄素治疗膝骨关节炎的分子机制,为膝骨关节炎的治疗提供新的研究方向。方法:通过中药系统药理学数据库及分析平台(TCMSP)数据库、蛋白质-化合物作用网(STITCH)数据库、Drugbank数据库、SEA数据库、SwissTargetPrediction数据库、药物靶标的蛋白质数据库(Binding DB)预测姜黄素的相关作用靶点,再结合基因表达数据库(GEO)公共数据库中关于姜黄素的相关芯片,使用GEO2R在线分析工具分析得到差异基因;同时检索治疗靶点数据库(TTD)、人类孟德尔遗传病(OMIM)数据库、DisGeNET数据库、Drugbank数据库和GeneCards数据库获得膝骨关节炎相关疾病靶点,明确姜黄素治疗膝骨关节炎的作用靶点,通过设置degree值得到关键靶点。利用STRING数据库构建药物-疾病共同靶点的蛋白质-蛋白质相互作用关系;并利用R语言对药物-疾病共同靶点进行GO分析和KEGG通路分析;利用IGEMDOCK软件对关键靶点进行分子对接。结果与结论:①通过检索上述药物数据库共获得姜黄素相关靶点339个;检索GEO数据库确定姜黄素相关序列号为GSE10896的芯片,筛选出397个差异基因;②检索上述疾病数据库共获得膝骨关节炎相关疾病靶点1903个,其中典型靶点有AKT1、NFKB1、RELA和IKBKB等;③利用STRING数据库构建129个共同靶点的蛋白质-蛋白质相互作用关系网络图;④GO分析功能富集显示,姜黄素治疗膝骨关节炎的生物学进程主要涵盖DNA结合转录因子、DNA结合转录激活剂活性、RNA聚合酶Ⅱ特异性、内肽酶活性、蛋白质丝氨酸/苏氨酸激酶活性、核受体活性、配体激活的转录因子活性、金属肽酶活性和磷酸酶结合等,信号通路主要表现为PI3K-Akt、MAPK、白细胞介素17、肿瘤坏死因子和缺氧诱导因子1信号通路;⑤分子对接结果显示关键靶点胰岛素样生长因子1受体、雌激素受体、EGFR、CYP19A1与靶蛋白有良好的亲和力;⑥结果证实,姜黄素治疗膝骨关节炎的机制涉及MAPK3、EGFR、雌激素受体1、MDM2、CYP19A1、MAPK14、雌激素受体和胰岛素样生长因子1受体共计8个关键靶点,还涉及PI3K-Akt、MAPK、白细胞介素17、肿瘤坏死因子和缺氧诱导因子1等主要信号通路,各靶点与各通路之间产生的交叉作用,可能会抑制炎症反应和软骨细胞凋亡,从而治疗膝骨关节炎。     

Molecular signalling of a novel curcumin derivative versus Tadalafil in erectile dysfunction

The efficacy of a novel curcumin derivative (NCD) versus tadalafil in erectile signalling was assessed. Ten control male rats and 50 diabetic male rats were used and divided into the following: diabetic (DM), curcumin (CURC), NCD, tadalafil and NCD combined with tadalafil rat groups. Cavernous tissue gene expression of heme oxygenase‐1 (HO‐1), Nrf2, NF‐B and p38, enzyme activities of heme oxygenase (HO) and nitric oxide synthase (NOS), cGMP and intracavernosal pressure (ICP)/mean arterial pressure (MAP) were assessed. Results showed that 12 weeks after induction of diabetes, erectile dysfunction (ED) was confirmed by the significant decrease in ICP/MAP, a significant decrease in cGMP, NOS, HO enzyme activities, a significant decrease in HO‐1 gene and a significant increase in NF‐?β, p38 genes. Administration of all therapeutic interventions led to a significant increase in ICP/MAP, cGMP levels, a significant increase in HO‐1 and NOS enzymes, a significant increase in HO‐1, and Nrf2 gene expression, and a significant decrease in NF‐?β, p38 gene expression. NCD or its combination with tadalafil showed significant superiority and more prolonged duration of action. In conclusion, a tendency was observed that CURC and NCD have high efficacy and more prolonged duration of action in enhancing erectile function.     

姜黄素抗肿瘤新剂型研究进展

姜黄素是从姜科植物根茎中提取的相对分子量较小的多酚类物质,具有抗肿瘤抗炎、抗病毒、抗氧化等多种药理作用,随着现代医学发展,姜黄素抗肿瘤方面药理作用的分子机制被不断认识。肿瘤的形成和发展是一个多阶段的过程,药物干预可作用于其中的任何阶段,人类希望能找到安全、高效的肿瘤预防与治疗药物。食物来源的天然药物姜黄素因其具备较低的毒副作用、较高的安全性和较高的依从性,可被各类人群尤其是中低风险人群长期服用,而倍受关注。然而姜黄素的一些理化性质决定了其应用不尽理想,如何改善这些缺陷逐渐成为当今研究姜黄素的热点。该文将从天然食物来源的预防肿瘤药物姜黄素应用新剂型进行综述。