大鼠血浆中重组人钙调磷酸酶B亚基的ELISA双抗体夹心法测定及其药动学研究
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篇名: | 大鼠血浆中重组人钙调磷酸酶B亚基的ELISA双抗体夹心法测定及其药动学研究 |
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摘要: | 目的:建立大鼠血浆中重组人钙调磷酸酶B亚基(rhCNB)的测定方法,并研究其药动学特征。方法:采用酶联免疫吸附(ELISA)双抗体夹心法,将1 μg/ml的rhCNB单克隆抗体mAb包板,加入待测样品,再加入rhCNB多克隆抗体pAb(稀释比例为 1 ∶ 5 000)和辣根过氧化酶(HRP)标记抗免疫球蛋白G(IgG)(稀释比例为1 ∶ 10 000),以四甲基联苯胺显色,用酶标仪在450 nm波长处测定吸光度(OD值)。测定6只大鼠iv 2.5 mg/kg rhCNB后2、15、30、60、120、240、480、720 min的血药浓度,以BAPP 3.0软件计算药动学参数。结果:rhCNB检测质量浓度的线性范围为0.195~12.5 ng/ml(r2=0.995 0),定量下限为0.195 ng/ml,准确度为97.300%~103.622%(RSD均小于7.5%,n=6);批内、批间和反复冻融3次的RSD均不大于8.5%(n=6、18、15)。该药在大鼠体内的药动学特征符合二室模型,AUC0-720 min为173.038 mg·min/L、t1/2为94.62 min。结论:建立的方法特异性强、灵敏度高、准确度及精密度好,可用于生物样品中rhCNB的定量检测和药动学研究。 |
ABSTRACT: | OBJECTIVE: To establish a method for determining recombinant human calmodulin B subunit (rhCNB) in rat plasma, and study its pharmacokinetics characteristics. METHODS: ELISA double-antibody sandwich method was adopted. 1 μg/ml rhCNB monoclonal antibody mAb was wrapped, added to the to-be-test sample, rhCNB polyclonal antibody pAb (dilution ratio of 1 ∶ 5 000) and HRP-labeled conjugate of anti-IgG (dilution ratio of 1 ∶ 10 000) were added. Using tetramethylbenzidine for developing, microplate reader was conducted in wavelength of 450 nm to determine the absorbance value (OD value) and plasma concentration of 6 rats after 2, 15, 30, 60, 120, 240, 480, 720 min of iv 2.5 mg/kg rhCNB, and the pharmacokinetic parameters were calculated by BAPP 3.0 software. RESULTS: The linear range of rhCNB were 0.195-12.5 ng/ml (r2=0.995 0), lower limit of quantitation was 0.195 ng/ml, accuracy were 97.300%-103.622% (RSD<7.5%, n=6); RSDs of within-batch, inter-batch, freezing and thawing 3 times were no higher than 8.5% (n=6, 18, 15). rhCNB pharmacokinetics characteristics in rat fitted to two-compartment model, AUC0-720 min was 173.038 mg·min/L and t1/2 was 94.62 min. CONCLUSIONS: The established method has high specificity and sensitivity, good accuracy and precision, which can be used for rhCNB quantitative detection and pharmacokinetics study in biological samples. |
期刊: | 2016年第27卷第25期 |
作者: | 韩克胜,谢学立,田树红,邢桂兰,符江,邢俊,林春华,谭鹏,邵继平 |
AUTHORS: | HAN Kesheng,XIE Xueli,TIAN Shuhong,XING Guilan,FU Jiang,XING Jun,LIN Chunhua,TAN Peng,SHAO Jiping |
关键字: | rhCNB多肽;酶联免疫吸附双抗体夹心法;大鼠;定量检测;药动学 |
KEYWORDS: | rhCNB polypeptide; ELISA-antibody sandwich method; Rat; Quantitative detection; Pharmacokinetics |
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