HPLC法测定藿香正气胶囊中厚朴酚与和厚朴酚的含量

目的测定藿香正气胶囊中厚朴酚与和厚朴酚的含量.方法采用HPLC法.色谱柱:采用Thermo 1254133T色谱柱(250×4.6mm,5μm);流动相:甲醇-水(75∶25);流速:1.0mL·min-1;检测波长:294nm.结果厚朴酚平均回收率为99.81%,RSD=0.3%(n=5);和厚朴酚平均回收率为100.14%,RSD=0.8%(n=5).结论方法简单易行,结果准确,可靠,适用于本品的含量测定.     

Down-regulation of c-Src/EGFR-mediated signaling activation is involved in the honokiol-induced cell cycle arrest and apoptosis in MDA-MB-231 human breast cancer cells

Honokiol is a naturally occurring neolignan abundant in Magnoliae Cortex and has showed anti-proliferative and pro-apoptotic effects in a wide range of human cancer cells. However, the molecular mechanisms on the anti-proliferative activity in cancer cells have been poorly elucidated. In this study, we evaluated the growth inhibitory activity of honokiol in cultured estrogen receptor (ER)-negative MDA-MB-231 human breast cancer cells. Honokiol exerted anti-proliferative activity with the cell cycle arrest at the G0/G1 phase and sequential induction of apoptotic cell death in a concentration-dependent manner. The honokiol-induced cell cycle arrest was well correlated with the suppressive expression of CDK4, cyclin D1, CDK2, cyclin E, c-Myc, and phosphorylated retinoblastoma protein (pRb) at Ser780. Apoptosis caused by honokiol was also concomitant with the cleavage of caspases (caspase-3, -8, and -9) and Bid along with the suppressive expression of Bcl-2, but it was independent on the expression of Bax and p53. In addition, honokiol-treated cells exhibited the cleavage of poly (ADP-ribose) polymerase (PARP) and DNA fragmentation. In the analysis of signal transduction pathway, honokiol down-regulated the expression and phosphorylation of c-Src, epidermal growth factor receptor (EGFR), and Akt, and consequently led to the inactivation of mTOR and its downstream signal molecules including 4E-binding protein (4E-BP) and p70 S6 kinase. These findings suggest that honokiol-mediated inhibitory activity of cancer cell growth might be related with the cell cycle arrest and induction of apoptosis via modulating signal transduction pathways.     

不同厂家藿香正气水质量比较研究及分析

目的:比较目前市场上流通的5个厂家藿香正气水的质量状况。方法:对5个厂家5批次药品进行装量差异和乙醇含量等常规检查,采用改进的高效液相色谱(HPLC)法测定药品中厚朴酚与和厚朴酚的含量,色谱柱为SHIMADZU HPLC-20AT ODSC18(150mm×4.6mm)柱,流动相为乙腈∶水=60∶40(2%冰乙酸),检测波长294nm。结果:改进HPLC方法测得和厚朴酚(r=0.9998)与厚朴酚(r=0.9999)在1～100mg·L-1范围内线性关系良好,厚朴酚的平均回收率为99.02%,RSD=1.78%;和厚朴酚的平均回收率为99.15%,RSD=0.97%。不同厂家生产的藿香正气水装量差异、乙醇含量、厚朴酚与和厚朴酚总量均符合2005年版《中国药典》中相关规定,但厚朴酚与和厚朴酚的含量差异较大。结论:建议进一步研究生产工艺,稳定原料药,并制定出科学、统一的质量标准。     

高效液相色谱法测定藿香正气水中橙皮苷等4种成分的含量

目的建立以高效液相色谱法测定藿香正气水中橙皮苷、甘草苷、厚朴酚和和厚朴酚含量的方法。方法色谱柱为C18色谱柱(4.6 mm×150 mm,5μm),梯度洗脱;检测波长285 nm;流速0.8 m l/m in。结果橙皮苷、甘草苷、厚朴酚和厚朴酚进样量0.091 1~2.277 5,1.44~36,0.594 6~14.865,1.086~27.15μg之间呈良好的线性关系;它们的平均回收率为99.48%(RSD=0.979 7%),99.505%(RSD=1.22%),98.89%(RSD=1.201 1%)和98.89%(RSD=1.07%)。结论该方法稳定可靠,重现性好,提供了藿香正气水的质量控制方法。     

高效液相色谱法测定复方厚朴颗粒中厚朴酚及和厚朴酚的含量

目的建立HPLC法测定复方厚朴颗粒中厚朴酚及和厚朴酚的含量。方法采用D iamondsilCMC18色谱柱(6.4 mm×200 mm,5μm);流动相为甲醇-0.1%磷酸溶液(78∶22);流速1 m l/m in;柱温35℃;检测波长294 nm。结果厚朴酚的线性范围为0.041 1~0.822 2μg,r=0.999 9,平均回收率为97.1%,RSD=1.27%;和厚朴酚的线性范围为0.023 06~0.461 2μg,r=1,平均回收率为96.7%,RSD=1.25%。结论该方法结果准确,重现性好,可作为复方厚朴颗粒质量控制的定量方法。     

和厚朴酚对组织因子途径抑制物 2诱导神经胶质瘤细胞凋亡的实验研究#br#

目的探讨和厚朴酚对组织因子途径抑制物 2（TFPI 2）表达的影响,以及和厚朴酚和TFPI 2过表达对人胶质瘤U251细胞凋亡的影响。 方法体外培养胶质瘤U87、U251、LN18、LN229、A172细胞系,荧光定量PCR（QPCR）检测不同细胞系中TFPI 2的表达。不同浓度（0、10、20、30、40和50 μmol／L）和厚朴酚干预U251细胞,QPCR和Western blotting检测TFPI 2 mRNA和蛋白的表达。采用腺病毒载体pGSadeno TFPI 2过表达U251细胞内TFPI 2的表达,流式细胞术及caspase 3试剂盒检测细胞凋亡率和caspase 3活性。 结果在选取的5种不同胶质瘤细胞株中,U251和A172细胞内TFPI 2 mRNA明显下降（P＜005）。和厚朴酚呈浓度依赖性增加U251细胞内TFPI 2 mRNA水平;其中50 μmol／L和厚朴酚干预24 h后, TFPI 2 mRNA表达水平升高最明显（P＜005）。腺病毒感染U251细胞后TFPI 2表达水平明显增加（P＜005）。过表达TFPI 2和50 μmol／L和厚朴酚干预均可增加U251细胞凋亡水平和caspase 3的活性（P＜005）。 结论和厚朴酚处理可增加U251细胞内TFPI 2的表达;和厚朴酚联合TFPI 2过表达显著诱导胶质瘤细胞凋亡。     

Inhibitory effects of honokiol on lipopolysaccharide-induced cellular responses and signaling events in human renal mesangial cells

Honokiol has been shown to possess a lot of pharmacologic benefits, including antioxidative, antiangiogenic and antineoplastic effects. In the present study, we investigated the anti-inflammatory effects of honokiol and the signaling mechanisms involved in lipopolysaccharide (LPS)-induced conditions in human renal mesangial cells (HRMCs). Honokiol did not significantly change HRMC viability when used at a concentration of < 20 μmol/l but markedly altered cell viability at concentrations of > 40 μmol/l. In this study, LPS treatment led to a marked upregulation of the levels of IL-1β, IL-18, TNF-α, TGF-β1, CCL2, CCL3, and CCL5 in HRMCs. The expression of COX-2, iNOS, and their products PGE₂ and NO also increased. The upregulation of these molecules was significantly abolished by honokiol in a dose-dependent manner. Moreover, honokiol almost completely reversed IL-1β, CCL3, and NO expression at 10 μmol/l, and IL-18, TNF-α, TGF-β1, and COX-2 expression at 20 μmol/l. In addition, phospho-NF-κB p65 at Ser536, phospho-Akt, and phospho-p42/44 were dramatically suppressed by honokiol in LPS-treated HRMCs. These results indicate that honokiol can inhibit the LPS-induced expression of inflammatory cytokines and mediators in HRMCs. The anti-inflammatory mechanisms of honokiol are partly due to the suppression of the phospho-NF-κB p65, phospho-Akt and phospho-p42/44 pathways.     

Honokiol-enhanced cytotoxic T lymphocyte activity against cholangiocarcinoma cells mediated by dendritic cells pulsed with damage-associated molecular patterns

BACKGROUND Cholangiocarcinoma or biliary tract cancer has a high mortality rate resulting from late presentation and ineffective treatment strategy. Since immunotherapy by dendritic cells (DC) may be beneficial for cholangiocarcinoma treatment but their efficacy against cholangiocarcinoma was low. We suggest how such antitumor activity can be increased using cell lysates derived from an honokioltreated cholangiocarcinoma cell line (KKU-213L5). AIM To increase antitumour activity of DCs pulsed with cell lysates derived from honokiol-treated cholangiocarcinoma cell line (KKU-213L5). METHODS The effect of honokiol, a phenolic compound isolated from Magnolia officinalis, on choangiocarcinoma cells was investigated in terms of the cytotoxicity and the expression of damage-associated molecular patterns (DAMPs). DCs were loaded with tumour cell lysates derived from honokiol-treated cholangiocarcinoma cells their efficacy including induction of T lymphocyte proliferation, proinflammatory cytokine production and cytotoxicity effect on target cholangiocarcinoma cells were evaluated. RESULTS Honokiol can effectively activate cholangiocarcinoma apoptosis and increase the release of damage-associated molecular patterns. DCs loaded with cell lysates derived from honokiol-treated tumour cells enhanced priming and stimulated T lymphocyte proliferation and type I cytokine production. T lymphocytes stimulated with DCs pulsed with cell lysates of honokiol-treated tumour cells significantly increased specific killing of human cholangiocarcinoma cells compared to those associated with DCs pulsed with cell lysates of untreated cholangiocarcinoma cells. CONCLUSION The present findings suggested that honokiol was able to enhance the immunogenicity of cholangiocarcinoma cells associated with increased effectiveness of DC-based vaccine formulation. Treatment of tumour cells with honokiol offers a promising approach as an ex vivo DC-based anticancer vaccine.     

和厚朴酚对大鼠脊髓背根神经元细胞瞬时受体电位通道活化和小鼠模型瘙痒的影响

【摘要】 目的 初步探讨和厚朴酚对瞬时受体电位通道（TRP）活化的影响和抗瘙痒作用。方法 用4 ~ 6周龄健康雄性ICR小鼠分别建立组胺诱导和乙醚/丙酮/水（AEW）诱导的瘙痒模型,将小鼠随机分为正常对照组、模型组、3种剂量和厚朴酚组（50、25和12.5 mg/kg）、溶媒组及氯苯那敏组（仅在组胺诱导实验中设置）。正常对照组和模型组给予生理氯化钠溶液灌胃,溶媒组给予羧甲基纤维素钠溶液灌胃,氯苯那敏组给予氯苯那敏灌胃,和厚朴酚组用不同浓度和厚朴酚灌胃。在组胺模型实验中,给予小鼠灌胃24 h后注射组胺;在AEW模型实验中,先用乙醚/丙酮/水处理小鼠4 d后再予不同药物灌胃。通过计数30 min内动物的搔抓次数评价各处理的抗瘙痒作用。分离培养原代大鼠脊髓背根神经元（DRG）细胞,将其分成6组,即辣椒素或异硫氰酸烯丙酯（AITC）诱导的模型组、辣椒平（500 μmol/L）或HSC030031（10 μmol/L）组、溶媒组、3种浓度（7.81、15.63、31.25 mg/L）和厚朴酚组：辣椒素或AITC诱导的模型组预先用Hanks平衡盐溶液孵育,辣椒平或HSC030031组、溶媒组、和厚朴酚组分别预先加入辣椒平或HSC030031、二甲基亚砜、不同浓度的和厚朴酚孵育,用Ca2+荧光成像技术观察辣椒素或AITC诱导后Ca2+细胞内流的变化。用SPSS 20.0软件进行单因素方差分析和Dunnett?t检验。结果 组胺诱导小鼠瘙痒模型经50 mg/kg和25 mg/kg和厚朴酚处理后,搔抓次数显著低于模型组（21.88和21.14比 63.70,t值分别为3.48、3.49,P值均为0.003）,12.5 mg/kg和厚朴酚组与模型组差异无统计学意义（t = 2.01,P = 0.062）。AEW诱导的小鼠瘙痒模型经50 mg/kg和厚朴酚处理后搔抓次数显著低于模型组（61.4比101.17,t = 0.45,P = 0.009）,但25 mg/kg和12.5 mg/kg和厚朴酚组与模型组相比差异无统计学意义（均P > 0.05）。31.25 mg/L和厚朴酚处理组与辣椒素或AITC诱导的模型组相比,DRG细胞内Ca2+荧光信号的升高受到显著抑制：辣椒素模型组第45秒时相对荧光强度变化率（△F/F0）为1.11,而31.25 mg/L和厚朴酚处理组为-0.11;AITC模型组第45秒时△F/F0为0.56,而31.25 mg/L和厚朴酚组为0.00。结论 和厚朴酚对组胺因素与非组胺因素诱导的瘙痒动物模型均具有瘙痒抑制作用,可能与其抑制DRG细胞TRPV1和TRPA1通道活化后Ca2+细胞内流有关。     

Honokiol induces ferroptosis in colon cancer cells by regulating GPX4 activity

Colon cancer (CC) is a prevalent malignancy worldwide. Approaches to specifically induce tumor cell death have historically been a popular research topic. Honokiol (HNK), which exhibits highly efficient and specific anticancer effects, is a biphenolic compound found in Magnolia grandiflora. In the present study, we aim to study the effect of HNK on CC cells and elucidate the potential underlying mechanisms. Seven CC cell lines (RKO, HCT116, SW48, HT29, LS174T, HCT8, and SW480) were used. Cells were exposed to HNK and subjected to a series of assays to evaluate characteristics such as cellular activity, reactive oxygen species (ROS) levels and ferroptosis-related protein expression levels. Lentiviral transduction was also used to verify molecular mechanisms in vivo and in vitro. We here observed that HNK reduced the viability of CC cell lines by increasing ROS and Fe²⁺ levels. Transmission electron microscopy revealed HNK-induced changes in mitochondrial morphology. HNK decreased the activity of Glutathione Peroxidase 4 (GPX4) but did not affect system Xc-. Thus, our datas indicated that HNK can induce ferroptosis in CC cells by reducing the activity of GPX4. As a potential therapeutic drug, HNK showed good anticancer effects through diverse signal transduction mechanisms and multiple pathways.