基于“辨状论质”的川产姜黄颜色与主要化学成分含量的相关性研究

目的对川产姜黄颜色值与主要化学成分姜黄素类成分(姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素、总姜黄素)含量之间的相关性进行研究。方法基于"辨状论质"理论,采用分光测色计对川产姜黄的切片与粉末颜色值进行测量,结合药材主要化学成分的含量,对二者进行相关性分析。结果川产姜黄粉末的颜色值L*、b*、ΔE*ab与姜黄素类各成分含量呈现极显著的负相关关系,相关系数均在0.4左右;颜色值a*与姜黄素类各成分含量呈现极显著的正相关关系,相关系数均在0.7左右。结论川产姜黄的颜色值a*相较于其他值相关程度更高,提示可通过姜黄粉末a*值预测和判断川产姜黄药材品质,从而验证"辨状论质"理论在姜黄药材鉴别中的科学性,为建立快速鉴别姜黄品质的评价体系奠定基础。     

基于UHPLC-ESI-QqQ-MS/MS技术的中药复方新天泰1号多类别多成分质量控制方法研究

目的建立同时快速测定新天泰1号制剂中19种药效成分(人参皂苷Rg1、Rb1、Rd,小檗碱、表小檗碱、药根碱、巴马汀、非洲防己碱、黄连碱、吴茱萸碱、吴茱萸次碱、去氢吴茱萸碱、柠檬苦素、金丝桃苷、姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素、松果菊苷、毛蕊花糖苷)的超高效液相色谱-电喷雾三重四极杆质谱(UHPLC-ESI-Qq Q-MS/MS)新方法,为产品提供全面高效的质量控制方法。方法采用Agilent 1290II高效液相色谱系统,Agilent Zorbax Eclipse Plus C18色谱柱(150 mm×4.6 mm,3.5μm),乙腈-0.1%甲酸水溶液为流动相进行梯度洗脱;采用正负离子多反应监测模式对各成分特定离子对进行监测,测定新天泰1号样品中19种活性成分含量。结果在15 min内完成19种活性成分的准确测定,极大地提高了分析效率;19种活性成分在线性范围内线性关系良好(r20.999 0);19种活性成分人参皂苷Rg1、Rb1、Rd及小檗碱、表小檗碱、药根碱、巴马汀、非洲防己碱、黄连碱、吴茱萸碱、吴茱萸次碱、去氢吴茱萸碱、柠檬苦素、金丝桃苷、姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素、松果菊苷、毛蕊花糖苷的回收率分别为94.80%、96.78%、95.59%、96.88%、97.74%、100.08%、96.27%、100.25%、98.32%、97.16%、95.60%、95.28%、96.81%、95.22%、96.85%、95.31%、93.86%、94.79%、95.20%;19种成分在3批样品中的定量测定结果分别为2.28~2.49 mg/g、0.82~0.90 mg/g、1.22~1.32 mg/g、14.44~15.50 mg/g、3.71~3.99 mg/g、3.26~3.49 mg/g、3.09~3.33 mg/g、4.39~4.72 mg/g、4.56~4.92 mg/g、0.52~0.57 mg/g、0.30~0.33 mg/g、4.46~4.76 mg/g、3.02~3.24 mg/g、2.59~2.76 mg/g、6.03~6.38 mg/g、1.47~1.58 mg/g、1.90~2.08 mg/g、3.40~3.88 mg/g、1.53~1.74 mg/g。结论 UHPLC-ESI-MS/MS多反应监测法可同时快速对新天泰1号中多种不同类型的活性成分进行监测,该方法快速,灵敏度高,重复性好,可用于本品质量控制,亦为中药质量研究提供参考和借鉴。     

Bisdemethoxycurcumin induces DNA damage and inhibits DNA repair associated protein expressions in NCI‐H460 human lung cancer cells

Nonsmall cell lung carcinoma (NSCLC) is a devastating primary lung tumor resistant to conventional therapies. Bisdemethoxycurcumin (BDMC) is one of curcumin derivate from Turmeric and has been shown to induce NSCLC cell death. Although there is one report to show BDMC induced DNA double strand breaks, however, no available information to show BDMC induced DNA damage action with inhibited DNA repair protein in lung cancer cells in detail. In this study, we tested BDMC‐induced DNA damage and condensation in NCI‐H460 cells by using Comet assay and DAPI staining examinations, respectively and we found BDMC induced DNA damage and condension. Western blotting was used to examine the effects of BDMC on protein expression associated with DNA damage and repair and results indicated that BDMC suppressed the protein levels associated with DNA damage and repair, such as 14‐3‐3σ (an important checkpoint keeper of DDR), O6‐methylguanine‐DNA methyltransferase, DNA repair proteins breast cancer 1, early onset, mediator of DNA damage checkpoint 1 but activate phosphorylated p53 and p‐H2A.X (phospho Ser140) in NCI‐H460 cells. Confocal laser systems microscopy was used for examining the protein translocation and results show that BDMC increased the translocation of p‐p53 and p‐H2A.X (phospho Ser140) from cytosol to nuclei in NCI‐H460 cells. In conclusion, BDMC induced DNA damage and condension and affect DNA repair proteins in NCI‐H460 cells in vitro. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1859–1868, 2016.     

不同产地姜黄中挥发油及姜黄色素的含量分析

目的:明确姜黄有效成分在不同地区的含量差异,考察姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素与挥发油之间含量的相关关系。方法:采集不同产地姜黄样品,结合HPLC-UV及2010年版《中国药典》中挥发油测定法分别分析姜黄中姜黄色素和挥发油的含量,采用SPSS 20.0软件的聚类分析及相关分析功能对测定的含量进行分析。结果:不同产地姜黄有效成分含量差异明显,姜黄色素质量分数最大值约4.9%,最小值仅约0.2%,相差约24.5倍;姜黄挥发油最大值与最小值之间差距达4.2倍。姜黄的传统道地产区含量优势明显,不同姜黄色素与挥发油之间均呈现极显著正相关关系。结论:海拔差异对姜黄中有效成分的含量变化有一定影响,姜黄的产区需要进行合理的规划以提高其品质并推进其产业的可持续发展。     

Chemopreventive effects of dietary phytochemicals against cancer invasion and metastasis: phenolic acids, monophenol, polyphenol, and their derivatives

Cancer metastasis is the major cause of cancer-related death, and chemoprevention is defined as the use of natural or synthetic substances to prevent cancer formation or cancer progress. Evidence that phenolic compounds may have a potential inhibitory effect on cancer invasion and metastasis is increasingly being reported in the scientific literature. Curcumin, resveratrol, and their related derivatives are the most studied compounds in this topic so far; gallic acid, chlorogenic acid, caffeic acid, carnosol, capsaicin, 6-shogaol, 6-gingerol, and their corresponding derivatives are also suggested to be the active members of the phenolic family on anti-invasion and anti-metastasis. Because metastasis occurs through a multistep process, these bioactives might act on a variety of stages of the metastatic process to prevent tumor cells from metastasizing. This review summarizes the common protein targets and signaling pathways for the inhibition of invasion and metastasis as well as past publications on the in vitro and in vivo effects and molecular mechanisms of phenolic acids, monophenol, polyphenol, and their derivatives, except flavonoids, on cancer invasion and metastasis. Based on these data, we conclude that the daily consumption of natural dietary components that are rich in phenolics could be beneficial for the prevention of cancer metastasis.     

双去甲氧基姜黄素通过降低线粒体膜电位诱导人白血病K562细胞凋亡

目的:探讨双去甲氧基姜黄素对K562细胞增殖的影响及其机制。方法:以1,10,30,50,100μmol·L~(~(-1))的双去甲氧基姜黄素对K562细胞作用48 h或72 h后MTT法检测细胞增殖;以10,30,50μmol·L~(-1)的双去甲氧基姜黄素对K562细胞作用24 h或48 h实验,另设空白组,AO/EB双染法倒置荧光显微镜观察凋亡形态,Rh123染色流式细胞仪检测线粒体膜电位,Annxin V/PI染色流式细胞仪检测凋亡率,Westren blot方法检测Bcl-2,Bax的表达活性。结果:与空白组比较,双去甲氧基姜黄素可剂量依赖性抑制K562细胞的增殖,在30,50μmol·L~(-1)浓度下,双去甲氧基姜黄素可诱导细胞凋亡,下调Bcl-2/Bax,并可降低线粒体的膜电位(P0.01)。结论:双去甲氧基姜黄素可抑制K562细胞的增殖,作用机制可能与改变线粒体膜电位诱导的细胞凋亡有关。     

自噬对双去甲氧基姜黄素诱导肝癌HepG2细胞凋亡作用的影响

目的:探讨自噬对双去甲氧基姜黄素诱导肝癌HepG2细胞凋亡作用的影响。方法:以24 mg·L~(-1)双去甲氧基姜黄素或联合5 mol·L~(-1)自噬抑制剂3-甲基腺嘌呤(3-methyladenine,3-MA)对HepG2细胞作用24,48 h,以四甲基偶氮唑盐(methye thiazolye telrazlium,MTT)比色法检测细胞活力;以24 mg·L~(-1)双去甲氧基姜黄素单用或联合3-MA对HepG2细胞作用48 h,Hoechst 33342染色倒置荧光显微镜观察细胞凋亡形态,磷脂结合蛋白V/碘化丙啶(Annxin V/propidium iodide,PI)双染检测细胞凋亡率,罗丹明123(Rhodamine 123,Rh123)染色检测线粒体膜电位,蛋白免疫印迹法(Western blot)检测自噬相关蛋白Beclin-1,LC3,半胱氨酸蛋白酶-3(Caspase-3),活化型Caspase-3(cleaved Caspase-3),B淋巴细胞瘤-2(Bcl-2),Bcl-2相关X蛋白(Bax)的活性表达。结果:与空白组比较,双去甲氧基姜黄素可抑制HepG2细胞增殖,诱导细胞凋亡,降低线粒体膜电位,使pro-Caspase-3,Bcl-2,LC3-Ⅰ蛋白表达降低(P0.01),升高cleaved Caspase-3,Bax,Beclin-1,LC3-Ⅱ蛋白的表达(P0.01);3-MA可增强双去甲氧基姜黄素所诱导的HepG2细胞凋亡,提高凋亡率(P0.01),增加其降低线粒体膜电位作用(P0.01),明显下调pro-Caspase-3,Bcl-2蛋白的表达(P0.01),并上调Beclin-1,LC3,cleaved Caspase-3蛋白的表达(P0.01)。结论:双去甲氧基姜黄素可经线粒体机制诱导HepG2细胞凋亡,并诱导细胞自噬,自噬对凋亡有抑制作用。     

Curcumin and its demethoxy derivatives possess p300 HAT inhibitory activity and suppress hypertrophic responses in cardiomyocytes

The natural compound, curcumin (CUR), possesses several pharmacological properties, including p300-specific histone acetyltransferase (HAT) inhibitory activity. In our previous study, we demonstrated that CUR could prevent the development of cardiac hypertrophy by inhibiting p300-HAT activity. Other major curcuminoids isolated from Curcuma longa including demethoxycurcumin (DMC) and bisdemethoxycurcumin (BDMC) are structural analogs of CUR. In present study, we first confirmed the effect of these three curcuminoid analogs on p300-HAT activity and cardiomyocyte hypertrophy.Our results showed that DMC and BDMC inhibited p300-HAT activity and cardiomyocyte hypertrophy to almost the same extent as CUR. As the three compounds have structural differences in methoxy groups at the 3-position of their phenol rings, our results suggest that these methoxy groups are not involved in the inhibitory effects on p300-HAT activity and cardiac hypertrophy. These findings provide useful insights into the structure–activity relationship and biological activity of curcuminoids for p300-HAT activity and cardiomyocyte hypertrophy.     

姜黄素、去甲氧基姜黄素和二去甲氧基姜黄素对照品的制备及姜黄素细胞毒性初步研究

目的建立从姜黄中制备姜黄素、去甲氧基姜黄素和二去甲氧基姜黄素对照品的方法,并对姜黄素进行细胞毒性初步研究。方法通过硅胶柱色谱对姜黄丙酮提取物进行分离纯化,IR、MS、1H-NMR波谱学方法对化合物进行结构鉴定,通过TLC和HPLC对其进行纯度检测;倒置显微镜观察姜黄素对高侵袭性人乳腺癌MCF-7细胞、低侵袭性人乳腺癌MDA-MB-231细胞和人肝癌HepG2细胞的毒性。结果从姜黄中分离、纯化出姜黄素、去甲氧基姜黄素和二去甲氧基姜黄素对照品,质量分数均>98%。10、100 ng/mL的姜黄素能明显抑制MCF-7、MDA-MB-231和HepG2细胞的生长,对HepG2细胞杀伤力较大。结论该法制备出的姜黄素、去甲氧基姜黄素和二去甲氧基姜黄素对照品符合中药化学对照品的相关要求,可作为姜黄药材及其制剂质量控制以及中药药效物质基础研究用的化学对照品;一定质量浓度的姜黄素能明显抑制人乳腺癌细胞和人肝癌细胞生长。     

姜黄中姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素的光稳定性分析

目的 研究姜黄中姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素的光稳定性,并对双去甲氧基姜黄素光化学反应产物进行考察。方法 姜黄的甲醇提取液于棕色量瓶储存,在自然光/避光条件下放置0、1、2、4、6、8 h后,HPLC法测定其指标成分姜黄素、去甲氧基姜黄素、双去甲氧基姜黄素量的变化;LC-MS法分析双去甲氧基姜黄素光化学反应产物。结果 姜黄素、去甲氧基姜黄素在自然光/避光条件下均有良好的稳定性;双去甲氧基姜黄素在避光条件下稳定,见光条件下发生光化学反应。结论 姜黄素和去甲氧基姜黄素具有良好稳定性,双去甲氧基姜黄素在自然光照射下不稳定,因此,姜黄药材分析供试液应于棕色量瓶中避光保存。