HPLC法测定枳实消痞丸中芸香柚皮苷、柠檬苦素、和厚朴酚及厚朴酚含量

摘 要 目的： 建立高效液相色谱法同时测定枳实消痞丸中芸香柚皮苷、柠檬苦素、和厚朴酚及厚朴酚含量的分析方法。方法: 色谱柱为岛津Shim-pack VP-ODS C18柱（250 mm×4.6 mm,5 μm）,流动相A为乙腈 甲醇(1∶2),流动相B为水,梯度洗脱,流速为1.0 ml·min^-1,柱温为30℃,进样量为20 μl;芸香柚皮苷检测波长为λ1=283 nm,柠檬苦素检测波长为λ2=210 nm,和厚朴酚、厚朴酚检测波长为λ3=294 nm。结果: 芸香柚皮苷、柠檬苦素、和厚朴酚、厚朴酚分别在5.26～105.20μg·ml^-1（r=0.999 8）、7.65～153.00 μg·ml^-1（r=0.999 4）、6.21～124.20 μg·ml^-1（r=0.999 3）、6.45～129.00 μg·ml^-1（r=0.999 6）范围内线性关系良好,平均加样回收率(n=6)分别为99.00％（RSD=0.77％）、98.17％（RSD=1.19％）、98.78％（RSD=0.86％）、97.90％（RSD=0.99%）。结论:该方法简便、准确、可靠,可用于枳实消痞丸的质量控制。     

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。     

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.     

厚朴中厚朴酚及和厚朴酚的分离条件初探

目的:研究硅胶柱层析法分离纯化厚朴中厚朴酚及和厚朴酚的优化工艺。方法:采用不同体系的洗脱液进行洗脱。以厚朴酚的纯度为考察指标筛选最佳洗脱系统。结果:四种不同系统的不同比例均分离得到了含量大于90%的单个化合物晶体,其中优选的洗脱系统为石油醚∶丙酮系统,比例为10∶1,厚朴酚纯度为98.34%,收率96.43%。结论:四种洗脱系统中以石油醚∶丙酮系统效果最佳。     

和厚朴酚的药理作用

厚朴为重要的传统中药,具燥湿化痰、降气除螨之功效,以厚朴为原料的中成药配方有近200种,应用广泛。厚朴主要药用活性成分为厚朴酚与和厚朴酚。和厚朴酚具有多种药理作用。对和厚朴酚药理研究状况进行综述。     

施肥、修剪等措施对凹叶厚朴中厚朴酚、和厚朴酚含量累积的影响

目的：提高凹叶厚朴的品质,缩短生产周期,为凹叶厚朴种植提供科学参考依据。方法：本次实验通过采用施肥、修枝、环割、铁丝环扎对凹叶厚朴进行处理,采用HPLC测定两年后厚朴中厚朴酚、和厚朴酚的含量,计算总酚含量增长率。结果：凹叶厚朴中总酚含量累积增长（1,）与肥料中的氮肥、磷肥正相关,与钾肥负相关,回归方程为：Y=1．804＋2．470N＋2．746P-15．616K（r=0．982）。修枝处理的凹叶厚朴中总酚的含量较前期增长了310％,环割处理的凹叶厚朴中总酚的含量较前期增加了125．65％,铁丝环扎处理的凹叶厚朴中总酚的含量较前期增加了343．2％,而同期的空白组中凹叶厚朴中总酚的含量较前期增加了84．62％。实验结果显示不同栽培措施的效果由大到小的顺序是：铁丝环扎〉修枝〉环割。结论：凹叶厚朴中厚朴酚、和厚朴酚含量的积累可以通过改变土壤的肥力、环割、修枝等栽培措施得以提高。     

HPLC法同时测定定喘止咳糖浆中5种成分的含量

目的建立高效液相色谱法同时测定定喘止咳糖浆中苦杏仁苷、和厚朴酚、厚朴酚、橙皮苷和川陈皮素含量的方法。方法采用依利特C_(18)柱,流动相为乙腈(A)-0.2%冰醋酸溶液(B),梯度洗脱;流速:0.8 mL/min;柱温:30℃;检测波长:λ_1=210 nm(苦杏仁苷),λ_2=254 nm(和厚朴酚、厚朴酚),λ_3=283 nm(橙皮苷、川陈皮素)。结果苦杏仁苷、和厚朴酚、厚朴酚、橙皮苷、川陈皮素的线性范围分别为12.10~242.00μg/mL(r=0.999 8)、7.65~153.00μg/mL(r=0.999 3)、6.37~127.40μg/mL(r=0.999 7)、4.29~85.80μg/mL(r=0.999 9)、3.90~78.00μg/mL(r=0.999 2);5种成分的平均加样回收率(n=6)分别为98.62%、96.94%、99.17%、96.85%、97.84%,RSD分别为0.88%、1.12%、1.10%、1.04%、1.55%。结论定喘止咳糖浆中5种成分的含量测定方法准确、可靠。     

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.     

和厚朴酚对哮喘小鼠气道重构及VEGF表达水平干预作用的研究

目的：观察哮喘小鼠模型气道重构的病理特点,探讨VEGF与气道重构的关系及和厚朴酚干预对气道重构的影响。方法：建立小鼠哮喘模型。分为对照组,哮喘组,和厚朴酚（Honokiol）干预组,地塞米松（DXM）干预组。图像分析肺内支气管平滑肌厚度。阿尔新兰染色,观察粘液分泌情况。EIA法检测血清血管上皮细胞生长因子（VEGF）表达。结果：①哮喘组出现管壁增厚、平滑肌增生、粘液分泌增加等特征,血清VEGF水平明显增高;②Honokiol组、DXM组与哮喘组比较,炎症反应轻微,平滑肌增生、粘液分泌不明显,血清 VEGF 水平降低;与对照组差异无显著性。结论：VEGF 在气道重构中发挥作用,Honokiol和DXM干预可延缓气道重构的发生。