HPLC法测定白芷中4个香豆素类成分的含量

目的:建立HPLC法同时测定白芷中花椒毒酚、佛手柑内酯、欧前胡素和异欧前胡素含量的方法,比较不同产地白芷的成分含量变化。方法:采用Zorbax SB-C₁₈色谱柱（150 mm×4.6 mm,5μm）,流动相组成为乙腈和水,线性梯度洗脱,检测波长300 nm,流速1.0 ml·min^-1。结果:在一定的浓度范围内,花椒毒酚、佛手柑内酯、欧前胡素和异欧前胡素的浓度与峰面积线性关系良好且具备良好的加样回收率。结论:本试验建立的HPLC方法简便易行,可用于白芷中4个活性成分的含量测定。     

花椒毒酚的药效学研究：Ⅲ镇痛作用

花椒毒酚是从蛇床子中提取的一种呋喃香豆素。ＸＴ明显抑制醋酸引起的小鼠扭体反应。ＸＴ显著提高热板法致痛小鼠的痛阈，此作用不被阿片受体拮抗剂纳络酮所拮抗。此外，ＸＴ明显降低大鼠角叉菜胶足跖炎痛组织内ＰＧＥ含量。这些结果表明ＸＴ确有镇痛作用，其镇痛机制主抑制ＰＧ的合成而非激动阿片受体。     

花椒毒酚抗炎作用的实验研究

花椒毒酚（xanthotoxol，XT）是从蛇床子中提取出的一种呋喃香豆素。XT对二甲苯所致小鼠耳壳肿胀、醋酸引起的小鼠腹腔毛细血管通透性增高、大鼠角叉菜胶性足跖肿胀均有明显的抑制作用，对小鼠棉球肉牙肿增生也有明显的抑制作用。结果表明XT对急性和慢性炎症模型均有抗炎作用。此外，XT明显降低大鼠角叉菜胶性足跖炎症组织内PGE含量。     

花椒毒酚的药效学研究 Ⅰ抗心律失常作用

花椒毒酚（ｘａｎｔｈｏｔｏｘｏｌ，ＸＴ）是从蛇床子乙醇提取物中分离出的一种香豆素。ＸＴ对氯仿诱发的小鼠室颤、氯化钙诱发的大鼠室颤均有明显的预防作用，对乌头碱诱发的大鼠心律失常有显著的治疗效果，且能明显提高兔心室电致颤阈。此外，ＸＴ还能降低蟾蜍离体坐骨神经干的动作电位振幅。这些均表明ＸＴ有抗心律失常的作用。ＸＴ的小鼠ｉｖＬＤ＿（５０）为４７．０ｍｇ·ｋｇ￣（－１）。     

花椒毒酚抗炎作用的实验研究

花椒毒酚（xanthotoxol，XT）是从蛇床子中提取出的一种呋喃香豆素。XT对二甲苯所致小鼠耳壳肿胀、醋酸引起的小鼠腹腔毛细血管通透性增高、大鼠角叉菜胶性足跖肿胀均有明显的抑制作用，对小鼠棉球肉牙肿增生也有明显的抑制作用。结果表明XT对急性和慢性炎症模型均有抗炎作用。此外，XT明显降低大鼠角叉菜胶性足跖炎症组织内PGE含量。     

HPLC法同时测定康妇软膏中异土木香内酯、土木香内酯、花椒毒酚、氧化前胡素、欧前胡素和蛇床子素

摘 要 目的：建立HPLC梯度洗脱法同时测定康妇软膏中异土木香内酯、土木香内酯、花椒毒酚、氧化前胡素、欧前胡素和蛇床子素的含量。 方法: 以Agilent TC C18（250 mm×4.6 mm,5 μm）为色谱柱,甲醇 0.1%甲酸溶液为流动相,梯度洗脱,流速0.9 ml·min^-1 ,检测波长分别为220 nm和300 nm,柱温35 ℃。 结果:异土木香内酯、土木香内酯、花椒毒酚、氧化前胡素、欧前胡素和蛇床子素分别在6.16～123.20 μg·m^-1 、3.78～75.60 μg·m^-1 、1.87～37.40 μg·m^-1 、4.06～81.20 μg·m^-1 、9.27～185.40 μg·m^-1 、13.89～277.80 μg·m^-1 范围内线性关系良好,相关系数分别为0.999 4,0.999 8,0.999 6,0.999 5,0.999 9和0.999 7;平均加样回收率分别为98.04%（RSD=1.06%）,97.10%（RSD=1.53%）,96.73%（RSD=0.90%）,98.92%（RSD=1.36%）,99.12%（RSD=0.83%）和100.27%（RSD=0.58%）。结论:该方法简便、准确,可用于康妇软膏质量标准的提高。     

Xanthotoxol alleviates secondary brain injury after intracerebral hemorrhage by inhibiting microglia-mediated neuroinflammation and oxidative stress

BackgroundOxidative damage and inflammation are two critical mechanisms underlying secondary brain injury (SBI) following intracerebral hemorrhage (ICH). Xanthotoxol is reported to alleviate brain edema and inhibit inflammatory responses. Herein, we investigated the effects of xanthotoxol and its related mechanisms in SBI post-ICH.MethodsTo explore the clinical effects of xanthotoxol an animal model of ICH was established. Neurological scores, survival rates and brain water content were measured. Inflammatory responses and oxidative damage in the peri-hemorrhagic areas were determined by measuring pro-inflammatory cytokines and oxidative related factors. The activation of the M1/M2 phenotype was detected by western blotting and immunofluorescence.ResultsXanthotoxol improved the neurological functions and reduced cerebral edema in ICH mice. Additionally, xanthotoxol inhibited microglia activation and promotes microglial phagocytosis. Simultaneously, xanthotoxol promoted the transformation of BV2 cells from M1 phenotype to M2 phenotype, and protected BV2 cells against hemin-induced inflammation and oxidative stress. Mechanistically, xanthotoxol inactivated the NF-κB p65 signaling pathway in the hemin-challenged BV2 cells.ConclusionXanthotoxol ameliorates SBI post-ICH by suppressing microglia-mediated neuroinflammation and oxidative stress and enhancing microglial phagocytosis through inhibition of NF-κB signaling.     

花椒毒酚对离体豚鼠心房肌的钙拮抗作用

目的:研究花椒毒酚(XT)抑制豚鼠心肌收缩力的作用机理.方法:采用张力描记法测定离体豚鼠左房肌的收缩力.结果:XT明显抑制豚鼠左房肌的正阶梯现象和静息后增强效应.钙通道阻滞药维拉帕米对正阶梯现象的抑制作用较XT为强,并可使正阶梯现象翻转,但对静息后增强效应无明显影响.XT对哇巴因的正性肌力作用及随后出现的心肌收缩力降低的毒性反应均有明显的对抗作用.结论:XT通过阻滞豚鼠左房肌的电压依赖性和受体调控性钙通道而发挥抑制心肌收缩力的作用.