欧芹素乙和异欧芹素乙对小鼠腹腔巨噬细胞体外释放肿瘤坏死因子的抑制作用

研究了欧芹素乙（Ｉｍｐｅｒａｔｏｒｉｎ，Ｉｍｐ）和异欧芹素乙（Ｉｓｏ－ｉｍｐｅｒａｔｏｒｉｎ，Ｉｓｉ）及对照药物维拉帕米（Ｖｅｒａｐａｍｉｌ，Ｖｅｒ）对小鼠腹腔巨噬细胞体外释放肿瘤坏死因子（Ｔｕｍｏｒｎｅｃｒｏｓｉｓｆａｃｔｏｒ，ＴＮＦ）的影响。结果表明：Ｉｍｐ、Ｉｓｉ及Ｖｅｒ对小鼠腹腔巨噬细胞体外释放ＴＮＦ具有显著的抑制作用。药物浓度在１０－６～１０－４ｍｏｌ／Ｌ范围内，该抑制作用呈剂量依赖性：药物浓度达１０－４ｍｏｌ／Ｌ时，则可完全抑制ＴＮＦ的释放。     

RP—HPLC测定清眩丸中欧前胡素的含量

目的：建立反相高效液相色谱测定清眩丸中欧前胡素含量的方法。方法：采用乙醇做溶剂,水浴加热回流提取。ＬＵＮＡ－Ｃ１８色谱柱分离测定,流动相为乙腈－水（５３∶４７）,流速１ｍＬ·ｍｉｎ－１,检测波长３００ｎｍ。结果：欧前胡素与其相邻峰的分离度是１５,理论板数按欧前胡素峰计算是１６１５５,欧前胡素对照品线性范围是１４６２～４８７５μｇ·ｍＬ－１,加样平均回收率９８０％。结论：用本文方法测定清眩丸中欧前胡素的含量,操作简便,结果准确。     

丹酚酸B及欧芹素乙对溶血磷脂酰胆碱刺激牛主动脉平滑肌细胞增殖的影响

目的　研究溶血磷脂酰胆碱 (L PC)对牛主动脉平滑肌细胞 (BASMC)增殖的影响及丹酚酸 B和欧芹素乙的抑制作用。方法　体外培养 BASMC,用 MTT法测定细胞增殖。结果　 L PC在 2 .5× 10 - 9～ 2 .5× 10 - 6 g/ L 剂量依赖性地促进 BASMC增殖 ;丹酚酸 B(1× 10 - 9～ 1× 10 - 6 mol/ L)和欧芹素乙 (1× 10 - 7～ 1× 10 - 3m ol/ L)浓度依赖性地抑制 L PC的作用。结论　 L PC可促进 BASMC增殖 ,丹酚酸 B和欧芹素乙可抑制 L PC的作用     

HPLC法同时测定蛇床子中蛇床子素和欧前胡素含量

目的用高效液相色谱法同时测定中药蛇床子中蛇床子素和欧前胡素的含量。方法采用KromasilC8(2 5 0mm× 4 6mm ,5 μm)为色谱柱 ,以甲醇 水 (体积比 6 5∶35 )为流动相的HPLC法 ,检测波长为 310nm ,流速为 0 8mL·min-1,柱温为室温。结果以醋酸氟轻松为内标 ,蛇床子素和欧前胡素分别在 13～ 2 0 8mg·L-1和 8～ 12 8mg·L-1内 ,线性关系良好 (r≥ 0 9998) ;平均回收率分别为 98 2 %和 97 5 % ;RSD分别为 1 7%和 2 0 % (n =9)。结论本法简便快速 ,回收率及重现性良好 ,适用于中药蛇床子中蛇床子素和欧前胡素的定量分析     

基于UPLC-Q-TOF-MS指纹图谱和分子对接技术筛选藿香正气水抗新冠病毒潜在质量标志物

目的 基于超高效液相色谱-四极杆-飞行时间串联质谱(UPLC-Q-TOF-MS)指纹图谱和分子对接技术,确定藿香正气水(Huoxiang Zhengqi Shui,HZS)抗新型冠状病毒(SARS-CoV-2)的潜在质量标志物(quality markers,Q-Marker)。方法 对27批HZS样品建立UPLC-Q-TOF-MS指纹图谱,结合化学计量学方法,筛选出HZS的差异性成分;以瑞德西韦为阳性对照,将HZS的差异性成分与SARS-CoV-2主蛋白酶(main protease,Mpro)进行分子对接,进一步确定HZS的潜在Q-Marker。结果 通过建立27批HZS样品的UPLC-Q-TOF-MS指纹图谱,标定了27种共有化合物;结合层次聚类分析(hierarchical clustering analysis,HCA)和主成分分析(principal component analysis,PCA),确定了其中14种共有化合物在27批HZS样品中具有较大的差异性,并鉴定出了橙皮苷、氧化前胡素、新比克白芷内脂、甜橙素、甘草酸、3,5,6,7,8,3'',4''-七甲氧基黄酮、桔皮素、欧前胡素、珊瑚菜素9种差异性化合物;9种差异性化合物的分子对接结果显示,橙皮苷、氧化前胡素、新比克白芷内脂、甘草酸、欧前胡素、珊瑚菜素6种化合物能与SARS-CoV-2 Mpro的活性氨基酸结合,具有抑制SARS-CoV-2 Mpro的潜能,可作为HZS的潜在Q-Marker。结论 将UPLC-Q-TOF-MS指纹图谱、化学计量学分析和分子对接技术交叉使用,确定了HZS的潜在Q-Marker,该方法为药物成分鉴定、同一类药物成分差异性分析,及其功效研究方面提供一定参考。     

Anti-inflammatory and antioxidant effects of coumarins isolated from Foeniculum vulgare in lipopolysaccharide-stimulated macrophages and 12-O-tetradecanoylphorbol-13-acetate-stimulated mice

Abstract

Context: Foeniculum vulgare (F. vulgare) is traditionally used to treat inflammatory diseases. Recently, anti-inflammatory and antioxidant activities of methanol extract of the fruits of F. vulgare were reported. To identify biologically active compounds responsible for the anti-inflammatory activity, we isolated four coumarins, scopoletin, 8-methoxypsoralen, bergapten and imperatorin from the fruits of F. vulgare.

Objective: This study assessed the anti-inflammatory and antioxidant effects of coumarins isolated from F. vulgare in lipopolysaccharide (LPS)-stimulated macrophages and 12-O-tetradecanoylphorbol-13-acetate (TPA)-stimulated mice.

Materials and methods: RAW 264.7 cells were treated with the coumarins (30?µM) and then stimulated with LPS (100 ng/ml). Ears of ICR mice were treated with TPA (1?µg/ear) once a day. Ten microliters each of the four coumarins (200?μg/ml) were topically applied to the ears for 3 days. Antioxidant activities were examined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis 3-ethylbenzthiazoline-6-sulfonic acid (ABTS) scavenging assays.

Results: All the tested coumarins showed excellent antioxidant activities in DPPH and ABTS radical scavenging assays. Among the coumarins, imperatorin had the greatest anti-inflammatory activities as measured by inhibition of the pro-inflammatory cytokines production including interleukin (IL)-6 and tumor necrosis factor (TNF)-α in LPS-stimulated RAW 264.7 cells through blockade of the IκB kinase (IKK)/inhibitor of kappa B (IκB)/nuclear factor-κB (NF-κB) pathway. In vivo experiments showed that imperatorin reduced TPA-induced ear thickness/weight, cutaneous cytokines expression and improved histopathological features.

Conclusion: Although four coumarins isolated from the fruits of F. vulgare provide effective anti-inflammatory and antioxidant activities, imperatorin is most potent.     

HPLC-CAD法测定元胡止痛胶囊中生物碱和香豆素

目的建立高效液相色谱法联合二极管阵列检测器(HPLC-DAD)法同时测定元胡止痛胶囊中延胡索乙素、盐酸黄连碱、去氢延胡索甲素、延胡索甲素、欧前胡素和异欧前胡素。方法采用HPLC-CAD法,Thermo Hypersil BDS C18色谱柱(250 mm×4.6 mm,5μm);流动相:乙腈–10 mmol/L甲酸铵(甲酸调pH 4.0),梯度洗脱;体积流量0.8 mL/min;CAD雾化器温度为35℃;柱温35℃;进样量为20μL。结果延胡索乙素、盐酸黄连碱、去氢延胡索甲素、延胡索甲素、欧前胡素和异欧前胡素分别在0.041～1.020、0.013～0.320、0.068～1.700、0.041～1.020、0.101～2.520、0.039～0.980μg与峰面积线性关系良好;平均回收率分别为98.41%、98.89%、98.32%、99.35%、98.05%、98.67%,RSD值分别为0.9%、1.4%、0.7%、1.1%、0.7%、0.9%。结论该方法准确、简便、灵敏度高,可用于元胡止痛胶囊中生物碱和香豆素类多成分的质量控制研究。     

基于信息熵理论的正交设计优化消乳增胶囊的提取工艺

目的优选消乳增胶囊中7味药材的提取工艺参数。方法采用HPLC测定芍药苷、阿魏酸、橙皮苷、欧前胡素、藁本内酯的含量,以此5种指标成分的提取率、药材提取的干膏得率和提取物指纹图谱相似度为综合评价指标,通过正交试验考察乙醇浓度、提取溶剂倍量、提取时间和提取次数对提取工艺的影响,采用信息熵赋权法确定各指标的客观权重,优选消乳增胶囊中7味药材的提取工艺参数。结果根据综合评分结果,确定该制剂最佳提取工艺为选用6倍量的50%乙醇,煎煮2次,每次2 h。3批验证综合评分均值为99.72,RSD为0.24%。结论优选后的工艺提取率高、稳定性和重复性好,适用于该制剂的大批量生产。     

高效液相色谱法测定骨刺丸中欧前胡素含量

目的建立骨刺丸中欧前胡素的含量测定方法。方法采用十八烷基硅烷键合硅肢柱,检测波长为300 nm,流动相为曱醇-水（60 ： 40）,柱温为35 ℃,流速为1.0mL/min。结果欧前胡素进样量在0. 028 4 - 0. 113 7叫范围内与峰面积呈良好线性关系（r = 0. 999 8）,平均回收率97.01% = 0.99% （ra = 6）。结论该方法操作简便、准确性好,可作为骨刺丸中欧前胡素的含量测定方法