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目的 探究姜黄素纳米乳在大鼠体内的药动学特性和对大鼠高脂血症的药效作用。方法 建立大鼠血浆中姜黄素的高效液相色谱-质谱联用(HPLC-MS)含量测定方法,考察纳米乳的体内药动学过程。建立SD大鼠高脂血症动物模型,初步考察姜黄素纳米乳对高脂饮食诱导的大鼠高脂血症的药效作用。结果 体内药动学研究结果表明,以姜黄素原料药为参比制剂,姜黄素纳米乳的相对生物利用度为313.47%;以市售片剂为参比制剂,姜黄素纳米乳的相对生物利用度为279.52%。纳米乳组的Cmax为原料药组的201.48%,为片剂组的193.02%,且比原料药组及片剂组具有更高的MRT值(为原料药组的183.52%,是片剂组的154.21%)。药效学研究结果表明姜黄素纳米乳口服给药系统能显著降低模型大鼠的血清总胆固醇(TC)、低密度脂蛋白(LDLc),缓解高脂饮食给模型大鼠造成的肝脏脂质沉积及肝损伤。结论 姜黄素纳米乳口服给药系统能够有效改善姜黄素的生物利用度,具有良好的降血脂作用,并能够控制高脂血症大鼠体重增长和改善由脂质代谢紊乱造成的肝脏系数变化。 相似文献
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姜黄素(curcumin)是从郁金、姜黄、莪术等姜科植物中提取的一种酚类化合物。大量研究表明,姜黄素具有稳定性差、口服难吸收、易代谢、生物利用度低等特点,而药剂学改造是目前广大研究者用于提高姜黄素生物利用度的重要方法之一。本文就姜黄素及经药剂学改造后的姜黄素的药动学研究作一综述。 相似文献
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目的:研究田蓟苷微乳在大鼠体内的药动学过程并考察生物利用度。方法:建立检测大鼠血浆中田蓟苷的HPLC方法,考察大鼠经灌胃和静脉途径给予田蓟苷单体及田蓟苷微乳后田蓟苷的药动学过程,DAS 2.0软件拟合药动学参数并计算生物利用度。结果:田蓟苷在0.027~43.200 μg·ml-1范围内线性关系良好(r≥0.999),田蓟苷微乳在大鼠体内的药动学过程符合二室模型,当灌胃剂量由25 mg·kg-1增至50 mg·kg-1时,t1/2β显著降低,而K、AUC(0-t)和Cmax显著增加;大鼠灌胃25 mg·kg-1和50 mg·kg-1田蓟苷微乳后田蓟苷的绝对生物利用度分别为3.4%和3.2%,相对于等剂量田蓟苷单体的相对生物利用度分别为147.2%和168.2%。结论:微乳给药系统作为田蓟苷的载体显著增加了田蓟苷的生物利用度。 相似文献
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目的建立家兔血浆中洛索洛芬钠浓度的HPLC定量分析方法,测定其在家兔体内的血药浓度经时过程,评价速释缓释双层片和普通片剂的生物等效性。方法血浆中加入内标布洛芬,酸化后经乙酸乙酯5mL提取.进行HPLC测定。给药方案采用单剂量自身交叉,采用DAS软件拟合药物浓度-时间曲线。计是药代动力学参数。结果与普通片相比,速释缓释鼹层片的tmax,t1/2,Cmax降低.相对生物利用度为(105.74%±7.67)%。结论本方法专属性强。灵敏度高,准确性好。速释缓释双层片与普通片生物等效。具有明显的缓释特征。 相似文献
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采用纳米乳化技术改善难溶性中药姜黄素(1)的溶解性及口服吸收行为,实现原位结直肠癌的高效治疗。使用高能剪切法制备了1纳米乳,粒径为(98.79±1.08) nm,透射电镜观测结果显示其呈圆球状。经体外模拟消化后,仍有(71.03±2.93)%的1溶于水相中。进一步的离体肠吸收试验和药动学试验结果显示,纳米乳可促进1的肠道吸收,主要吸收部位为十二指肠,且呈现吸收快、消除慢的药代动力学特征,口服相对生物利用度为313.50%。在原位结直肠癌裸鼠模型中,1纳米乳口服后可有效抑制结直肠癌的肿瘤生长,剥离所得的肿瘤组织质量约为磷酸盐缓冲液处理组的23.91%,说明1纳米乳在原位结直肠癌方面具有良好的治疗前景。 相似文献
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目的:研究常春卫矛水提物、醇提物及5种不同溶剂提取物的抑菌活性。方法体外抑菌试验采用试管二倍稀释法联合琼脂平板法,考察常春卫矛水提物、醇提物及5种不同溶剂(石油醚、氯仿、乙酸乙酯、正丁醇、甲醇)提取物对金黄色葡萄球菌、大肠埃希菌、沙门菌、铜绿假单胞菌的体外抑菌活性;体内抑菌试验以金黄色葡萄球菌为指示菌种,小鼠灌胃分别给予常春卫矛水提物、醇提物14凿,腹腔注射金黄色葡萄球菌,通过观察小鼠死亡率衡量常春卫矛提取物的体内抑菌活性。结果体外抑菌试验显示,常春卫矛水提物及醇提物均对金黄色葡萄球菌、大肠埃希菌、沙门菌、铜绿假单胞菌有一定程度的抑制作用,5种不同溶剂提取物中,甲醇、正丁醇、乙醇乙酯提取物对金黄色葡萄球菌、大肠埃希菌、沙门菌、铜绿假单胞菌有一定程度的抑制作用,石油醚、氯仿提取物无明显抑制作用。体内抑菌试验显示,常春卫矛水提物低(16.0 g/kg)、高(32.0 g/kg)剂量组、醇提物高剂量组(32.0 g/kg)有明显降低金黄色葡萄球菌感染小鼠死亡率的作用(P<0.05)。结论常春卫矛提取物具有一定程度的抑菌作用。 相似文献
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重组人红细胞生成素体内外活性检测方法的比较 总被引:1,自引:1,他引:1
目的对重组人红细胞生成素 (rhEPO)体内外活性测定结果进行比较 ,说明体内外活性测定对rhEPO质量控制的意义。方法采用59Fe摄入法、网织红细胞法和ELISA法测定rhEPO制品的体内外生物学活性。结果59Fe摄入法和网织红细胞法测定结果一致 ,与rhEPO唾液酸含量具有相关性。当rhEPO唾液酸含量较低时 ,ELISA法与体内活性测定结果有较大差异。结论rhEPO体内外活性测定方法可以相互补充 ,均是保证rhEPO质量不可缺少的质控手段。 相似文献
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目的评价盐酸头孢他美对临床常见致病菌的体外和体内抗菌作用。方法采用试管二倍稀释法测定最低抑菌浓度(MIC),同时与对照药头孢克洛进行对比。结果头孢他美对革兰氏阳性菌如乙型溶血性链球菌、肺炎链球菌有较强的抗菌活性,MICso均为0.25μg/mL;对革兰阴性菌如淋球菌、肺炎克雷伯杆菌、痢疾杆菌、流感嗜血杆菌也有较强的抗菌活性,MIC50分别为0.25、0.5、0.5和0.5μg/mL。头孢他美酯口服给药对金葡菌、大肠埃希菌感染小鼠有明显的保护作用,其ED50分别为24.6和9.3mg/kg,头孢他美酯对金葡菌的抗菌活性弱于头孢克洛,但对大肠埃希菌的抗菌活性强于头孢克洛。结论头孢他美和头孢他美酯对临床常见致病菌有良好的抗菌作用。 相似文献
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Immunomodulatory effects of the herbicide propanil on cytokine production in humans: In vivo and in vitro exposure 总被引:1,自引:0,他引:1
Corsini E Codecà I Mangiaratti S Birindelli S Minoia C Turci R Viviani B Facchi A Vitelli N Lucchi L Galli CL Marinovich M Colosio C 《Toxicology and applied pharmacology》2007,222(2):202-210
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《Pharmaceutical development and technology》2013,18(6):684-693
AbstractPerindopril erbumine (PE) is a BCS (Biopharmaceutics Classification System) class 3 drug with high solubility and low permeability. It is an inhibitor of the enzyme that converts angiotensin I (Angiotensin Converting Enzyme, ACE) into angiotensin II as well as causing the degradation of the vasodilator bradykinin into an inactive heptapeptide. The aim of this study was to develop an alternative drug product by using a different salt of perindopril and to evaluate the bioequivalence between PE, not still licensed, and perindopril arginine (PA), licensed in many countries, and to prepare PE tablets by using direct compression method. Many different formulations were prepared, among which F3-coded formulation was only selected due to releasing of 98.03% active substance at 45th minute. Bioequivalence study was planned as a cross-designed, randomized, open-labeled, single-dose, single-center study and conducted in 24 male healthy volunteers via peroral route. The results of bioequivalence study were evaluated for Perindopril and Perindoprilat according to Cmax, tmax and AUC criteria. The geometric mean ratios (90% CI) of perindopril and perindoprilat followed test and reference drug were calculated for AUC0–t and Cmax, 105.946% (100.218–112.002%) and 110.437% (102.534–118.948%); 109.542% (98.364–121.992%) and 115.729% (101.031–132.565%), respectively. The 90% confidence intervals of them were found within the standard bioequivalence range (80–125%). 相似文献
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目的 评价头孢卡品酯的体内外抗菌活性,并与其他三种头孢类抗生素进行比较,为头孢卡品酯在我国的临床应用及了解其抗菌特性提供依据.方法 使用2008至2009年从北京地区收集的临床菌株,采用平皿二倍稀释法、试管二倍稀释法和菌落计数等测定各药物的体外抗菌活性,包括最低抑菌浓度、最低杀菌浓度、杀菌曲线等等,同时以小鼠感染保护试验评价头孢卡品酯及对照药物头孢妥仑酯的体内抗菌活性.结果 头孢卡品酯对包括革兰阳性菌和革兰阴性菌在内的多种细菌均具有很强的体内外抗菌活性,尤其对细菌性肺炎相关的致病菌具有非常好的疗效.结论 头孢卡品酯是一种有效的广谱头孢类抗生素,具有良好的临床使用前景. 相似文献
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Roxithromycin的药效学研究 总被引:1,自引:1,他引:1
报道国产roxithromycin(ROX)对205株临床致病菌体内外抗菌活性及不同试验条件对抗菌活性的影响,并与进口产品及红霉素、麦迪霉素、柱晶白霉素、青霉素钾盐的抗菌活性进行比较。还进行了杀菌试验,结果表明,国产与进口ROX及红霉素体外抗菌作用相似,对革兰氏阳性和阴性球菌有较好的抑制作用。另外,ROX在偏碱性环境中抑菌效果较强,对10^5、10^7cfu/ml细菌的MIC基本一样。对感染金葡萄 相似文献
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Raguia Ali Shoukri Iman Saad Ahmed Rehab N. Shamma 《European journal of pharmaceutics and biopharmaceutics》2009,73(1):162-171
Development of a lyophilized orally disintegrating tablet (ODT) that enhanced the in vitro dissolution and in vivo absorption of nimesulide (NM), a drug with poor solubility and poor bioavailability, is presented. The ODTs were prepared by freeze-drying an aqueous dispersion of NM containing a matrix former, a sugar alcohol, and a collapse protectant. In addition, different disintegration accelerators were tested. The influence of formulation parameters on the disintegration time and in vitro dissolution of NM from ODTs along with other tablet characteristics was investigated. Results obtained from disintegration and dissolution studies showed that lyophilized ODTs disintegrated within few seconds and showed significantly faster dissolution rate of NM compared to the plain powder drug and NM in commercially available immediate release tablet Sulide®. The ODTs were also examined using differential scanning calorimetry, X-ray diffraction, and scanning electron microscope. Stability results, after 12-month storage of selected ODTs at 25 °C and 60% relative humidity, were satisfactory. The extent of absorption of NM from a selected ODT when compared to an conventional immediate release tablet as a reference after administration of 100 mg oral dose of NM was determined in healthy subjects using a randomized crossover design. In this study, the rate of absorption of NM from ODT was faster than that from the reference tablet, had a significantly higher (p = 0.012) peak plasma concentration, and shortened time to Cmax by 1 h (p = 0.029). The extent of absorption expressed by AUC was 62% larger when compared to the commercially available tablet. 相似文献