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大鼠肠道菌群对吡嗪酰胺及其活性代谢产物吡嗪酸药动学参数的影响
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| 篇名： | 大鼠肠道菌群对吡嗪酰胺及其活性代谢产物吡嗪酸药动学参数的影响 |
| TITLE： | Effects of Rat Intestinal Flora on the Pharmacokinetic Parameters of Pyrazinamide and Its Active Metabolite Py- razinoic Acid |
| 摘要： | 目的：研究大鼠肠道菌群对吡嗪酰胺及其活性代谢产物吡嗪酸药动学参数的影响。方法：将16只SD大鼠随机分为实验组和对照组，每组8只。实验组大鼠灌胃混合抗生素（硫酸链霉素+硫酸新霉素）构建伪无菌大鼠模型。建模后，两组大鼠灌胃吡嗪酰胺（150mg/kg），并于给药前和给药后0.167、0.333、0.667、1、1.5、2、3、4、6、9h时从眼眶静脉丛采血0.1mL，给药后12、24h时从眼眶静脉丛采血0.3mL。以非那西丁为内标，采用液相色谱-串联质谱法测定大鼠血浆中吡嗪酰胺和吡嗪酸的浓度。以Agi-lentZorbaxSB-Aq为色谱柱，以0.2％甲酸水溶液（含8mmol/L乙酸铵）-甲醇为流动相进行梯度洗脱，流速为1mL/min，柱温为30℃，进样量为10μL；以电喷雾电离源为离子源，离子源温度为500℃；碰撞气为氮气，压力为10psi；质谱传输接口温度为100℃；质谱监测模式为多反应监测，采集模式为正离子模式；用于定量分析的离子对分别为m/z124.0→79.0（吡嗪酰胺）、m/z125.1→79.1（吡嗪酸）、m/z180.0→110.2（内标），去簇电压分别为55、26、85V，碰撞电压分别为24、23、28V。使用DAS2.1.1软件计算药动学参数并比较。结果：吡嗪酰胺和吡嗪酸检测质量浓度的线性范围分别为25～5000ng/mL（r＝0.9976）、100～12500ng/mL（r＝0.9990）；定量下限分别为25、100ng/mL；批内、批间准确度为92.93％～100.50％，批内、批间精密度和基质效应试验的RSD均不高于8.42％（n＝6或n＝3）。与对照组比较，实验组大鼠体内吡嗪酰胺的tmax显著延长（P＜0.01），而其余药动学参数组间比较差异无统计学意义（P＞0.05）。结论：大鼠肠道菌群改变可导致单剂量吡嗪酰胺的吸收延迟。 |
| ABSTRACT： | OBJECTIVE：To study the effects of rat intestinal flora on the pharmacokinetic parameters of pyrazinamide and its active metabolite pyrazinoic acid. METHODS ：Totally 16 SD rats were randomly divided into trial group and control group ，with 8 rats in each group. Trial group was given mixed antibiotics （streptomycin sulfate+neomycin sulfate ）intragastrically to construct pseudoaseptic rat model. After modeling ，both groups were given pyrazinamide intragastrically （150 mg/kg）. Before and 0.167， 0.333，0.667，1，1.5，2，3，4，6，9 h after administration ，0.1 mL blood sample was collected from orbital venous plexus ，and 0.3 mL blood sample was collected from orbital venous plexus 12，24 h after administration. Using phenacetin as internal standard ， LC-MS/MS method was adopted to determine the plasma concentration of pyrazinamide and pyrazinoic acid. The determination was performed on Agilent ZORBAX SB-Aq column with mobile phase consisted of 0.2％ formic acid （containing 8 mmol/L ammonium acetate）-methanol（gradient elution ）at the flow rate of 1 mL/min. The column temperature was set at 30 ℃，and sample size was 10 μL. The ion source was ESI and the temperature of ion source was 500 ℃. The collision gas was nitrogen and the pressure was 10 psi. The temperature of mass transfer interface was 100 ℃. The mass spectrum monitoring mode was multi reaction monitoring ， and the collection mode was positive ion mode. The monitoring transition ion-pairs were m/z 124.0→79.0（pyrazinamide），m/z 125.1→79.1（pyrazinic acid ）and m/z 180.0→110.2（internal standard ）. The de-clustering potential and collision voltage were 55， 26 and 85 V，24，23 and 28 V，respectively. The pharmacokinetic parameters were calculated and compared by using DAS 2.1.1 software. RESULTS ：The linear ranges of pyrazinamide and pyrazinoic acid were 25-5 000 ng/mL（r＝0.997 6）and 100-12 500 ng/mL（r＝0.999 0）. The lower limits of quantification were 25 and 100 ng/mL，respectively. Intra-batch and inter-batch accuracy were 92.93％-100.50％，and RSDs of intra-batch and inter-batch precision and matrix effect tests were all lower than or equal to 8.42％（n＝6 or n＝3）. Compared with control group ，tmax of pyrazinamide in trial group was prolonged significantly （P＜0.01）； there was no statistical significance in other pharmacokinetic parameters between 2 groups（P＞0.05）. CONCLUSIONS ：The absorption of single dose pyrazinamide is delayed with the change of intestinal flora in rats. |
| 期刊： | 2021年第32卷第04期 |
| 作者： | 刘庆香，武正华，赖雅琳，范国荣，范琦 |
| AUTHORS： | LIU Qingxiang，WU Zhenghua，LAI Yalin，FAN Guorong，FAN Qi |
| 关键字： | 吡嗪酰胺；吡嗪酸；大鼠；肠道菌群；药动学；液相色谱-串联质谱法 |
| KEYWORDS： | Pyrazinamide；Pyrazinoic acid ；Rat；Intestinal flora ；Pharmacokinetics；LC-MS/MS |
| 阅读数： | 229 次 |
| 本月下载数： | 7 次 |
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