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Abstract: Objective To establish a HPLC method for determination of alltrans retinoic acid in human plasma. Methods A Supelcosil LC18DB column (5 μm,4.6 mm×250 mm) was adopted. Mobile phase was a mixture of methanol,water and glacial acetic acid(82∶17∶1). The flow rate was 1.5 mL・min-1. The UV detection wave was 340 nm. ResultsThe assay procedure was shown to produce linear calibration curves over the range of 10 ng・mL-1 to 1000 ng・mL-1 of alltrans retinoic acid in plasma (r=0.9997). Within the range,the recovery rate was (94.5±4.7)%,and the intraday RSD and interday was less than 4.1% and 6.2%,respectively. The detection limit of all trans retinoic acid was 2.5 ng・mL-1. Conclusions This method is repeatable,convenient and sensitive for plasma concentration monitoring and clinical pharmacokinetics study of alltrans retinoic acid.
Key words:alltrans retinoic acid; plasma concentration; HPLC
全反式维甲酸(alltrans retinoic acid,ATRA) 是维生素A 的天然氧化代谢产物,可抑制白血病细胞的增殖,诱导白血病细胞分化成熟,是目前治疗急性早幼粒细胞白血病(APL)的有效药物。ATRA对APL初发患者完全缓解率可达85%以上,但对复发患者再次应用ATRA则效果不佳,其原因可能是ATRA对参与其代谢的酶活性具有自身诱导作用,持续用药导致血药浓度逐步降低[1]。本文参考文献[2-4],建立了一种灵敏、准确的ATRA血药浓度HPLC测定法,旨在为全反式维甲酸临床血药浓度监测及人体药代动力学研究提供测定方法。
1 材料与方法
1.1 仪器
Waters高效液相色谱仪(515型恒流泵,486型紫外检测器,Millennium32色谱工作站);XW―80A旋涡混合器(上海医科大学仪器厂);3K18高速冷冻离心机(Sigma);高速离心机(美国雅培公司TDx仪附件)。
1.2 药品与试剂
ATRA对照品(Sigma,纯度:98%),阿维A酸(内标,罗氏公司),甲醇为色谱纯试剂,其余试剂均为分析纯。
1.3 色谱条件
色谱柱为Supelcosil LC18DB柱(5 μm,4.6 mm×250 mm);柱温为室温。流动相:甲醇水冰乙酸(体积比82∶17∶1);流速1.5 mL・min-1。检测波长340 nm。
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