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癫痫患者左乙拉西坦群体药动学及MDR1 C3435T多态性研究

发布时间:2018-04-10 06:34

  本文选题:左乙拉西坦 切入点:难治性癫痫 出处:《福建医科大学》2014年硕士论文


【摘要】:目的 1.建立癫痫患者左乙拉西坦(LEV)群体药动学(PPK)模型,为个体化给药提供参考。 2.探讨MDR1C3435T多态性与癫痫耐药的关系。 方法 1.建立高效液相色谱(HPLC)法测定LEV血药浓度; 2.应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术检测MDR1C3435T; 3.应用NONMEM法建立LEV群体药动学模型,考察患者生理指标、LEV血药浓度、MDR1C3435T基因型以及合并用药等因素对LEV药动学参数的影响; 4.根据疗效评级将癫痫患者分为耐药组和敏感组,比较MDR1C3435T基因分型在两组间的差异。 结果 1. HPLC法测定LEV血药浓度,标准曲线回归方程为y0.001x0.00173(r2=0.9994),线性范围1~80μg mL-1。提取回收率86%~89%,,方法回收率99%~101%;日内、日间精密度(RSD)<2%;最低检测限0.5μg mL-1(S"N≥3)。 2.99例癫痫患者MDR1C3435T基因型分布频数:CC型33例(33.3%)、CT型52例(52.6%)和TT型14例(14.1%);CC、CT和TT各基因型分布频数的观测值与理论值之间的差异无统计学意义(P=0.462,>0.05)。 3.基于99例癫痫患者150个血样数据及相关指标,建立左乙拉西坦PPK模型,最终回归模型为:0.303 清除率:CL2.45WT0.227(L-147e h),表观分布容积: V27.7(L)。体重(WT)是影响左乙拉西坦药动学参数的主要因素。 4.耐药组47例患者MDR1C3435T基因型分布频数分别为:CC型13例(27.66%)、CT型29例(61.7%)和TT型5例(10.64%);敏感组28例患者MDR1C3435T基因分布频数分别为CC型9例(32.14%)、CT型14例(50%)和TT型5例(17.86%);耐药组患者C和T等位基因频率分别为58.51%和41.49%,敏感组患者C和T等位基因频率分别为57.14%和42.86%。CC、CT、TT基因型频率和C、T等位基因频率在两组间的差异均无统计学意义(P值为0.082和0.774,>0.05)。 结论 1. HPLC法测定LEV血药浓度简便易行,灵敏度高、准确性好,适用于治疗药物监测与药动学研究。 2. PCR-RFLP技术检测MDR1C3435T,方法可行,结果可靠。 3.本文建立的癫痫患者左乙拉西坦PPK模型稳定有效,具有较好预测能力,可为临床制定个体化用药提供参考。 4. MDR1C3435T多态性可能不是癫痫耐药的影响因素。
[Abstract]:Purpose1.To establish a group pharmacokinetic model of levalacetam Lev in epileptic patients, and to provide reference for individualized administration.2.To investigate the relationship between MDR1C3435T polymorphism and drug resistance in epilepsy.Method1.A high performance liquid chromatography (HPLC) method was established to determine the concentration of LEV in blood.2.Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to detect MDR1C3435T;3.The pharmacokinetic model of LEV population was established by NONMEM method. The effects of the serum concentration of LEV and MDR1C3435T genotype and the combined use of drugs on the pharmacokinetic parameters of LEV were investigated.4.Patients with epilepsy were divided into drug resistant group and sensitive group according to the efficacy rating. The difference of MDR1C3435T genotyping between the two groups was compared.Result1.The serum concentration of LEV was determined by HPLC. The regression equation of standard curve was y0.001x0.00173r2O0.9994, and the linear range was 1U 80 渭 g mL -1.The recovery rate was 86% and 89% respectively. The recovery rate of the method was 99g / 101. During the day, the precision was less than 2. The lowest detection limit was 0. 5 渭 g mL-1(S "N 鈮

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