ABCB1(2677T>G)、SLCO1B1(521T>C)基因多态性与阿托伐他汀个体化用药的研究

目的:探讨新乡地区人群ABCB1 (2677T>G)和SLCO1B1 (521T>C)单核苷酸多态性(SNPs)对心脑血管疾病患者服用阿托伐他汀的不良反应及降脂疗效的影响。方法:通过荧光原位杂交法、高效液相色谱法等,考察患者SLCO1B1 (521T>C)、ABCB1(2677T>G)SNPs与阿托伐他汀药动学、药效学及不良反应的相关性。结果:在新乡市中心医院的90例入选患者中,SLCO1B1 (521T>C)、ABCB1 (2677T>G)等位基因突变频率分别为18.1%和69.8%。用药前后,SLCO1B1 (521T>C)SNPs与阿托伐他汀的血药浓度有相关性,但对其疗效及肌痛风险影响较小,各基因型间差异无显著性。ABCB1 (2677T>G)各基因型患者阿托伐他汀血药浓度组内差异具有显著性(P<0.05),相比ABCB1 2677T等位基因,携带ABCB1 2677G基因的患者对LDL-C降低作用更强,且出现肝毒性的风险较高。结论:ABCB1 (2677T>G)SNPs与阿托伐他汀的降脂疗效及肝毒性具有相关性,G等位基因可能是阿托伐他汀致肝毒性的因素之一。SLCO1B1 (521T>C)SNPs对阿托伐他汀的降脂疗效及肌痛风险无显著影响。     

SLCO1B1 521T>C和388A>G基因多态性对冠心病患者阿托伐他汀降脂疗效的影响

目的:探讨SLCO1B1 521T>C和388A>G基因多态性对冠状动脉粥样硬化性心脏病患者应用阿托伐他汀降脂疗效的影响,为临床合理用药提供参考.方法:纳入2017年11月–2018年8月就诊于我院的冠心病患者,给予阿托伐他汀钙20 mg·d-1,服用12周.测定患者用药前及用药12周后的血脂水平,包括总胆固醇(TC)...     

ABCB1基因多态性对阿托伐他汀降脂疗效与肝功能异常不良反应的影响

目的：探讨ABCB1(2677T>G)基因多态性对阿托伐他汀降脂疗效与肝功能异常相关不良反应的影响。方法：选择2018年12月—2020年12月我院住院高脂血症患者110例作为研究对象,均经阿托伐他汀治疗3个月,采用荧光原位杂交法测定ABCB1(2677T>G)基因多态性,评价基因多态性对阿托伐他汀降脂疗效与肝功能异常相关不良反应的影响。结果：110例患者中ABCB1(2677T>G)基因频率分别为GG(60例)54.55%、 GT(26例)23.64%、TT(24例)21.82%,基因突变频率为78.18%。携带ABCB1 2677GG基因型的患者TC、LDL-C水平低于其他基因型患者（P<0.05）;不同基因型患者TG、HDL-C比较,差异无统计学意义（P>0.05）。携带ABCB1 2677GG基因型的患者ALT、AST水平高于其他基因型患者,且肝功能异常不良反应发生率高于其他基因型（P<0.05）。结论：携带ABCB1 2677GG基因型的患者接受阿托伐他汀治疗时,降脂疗效较好,对肝功能影响也较大。     

瑞舒伐他汀和阿托伐他汀的降脂疗效与ABCB1基因多态性的相关性

目的 研究瑞舒伐他汀和阿托伐他汀降脂疗效与ABCB1 G2677T基因多态性的相关性.方法 采用实用性随机对照试验,将收集符合标准的483例ABCB1 G2677T基因检测患者分为瑞舒伐他汀组和阿托伐他汀组,分析瑞舒伐他汀和阿托伐他汀降脂疗效与ABCB1基因多态性之间的相关性.结果 483例患者的ABCB1 G2677...     

基于ABCB1 （2677T>G）基因多态性指导阿托伐他汀与瑞舒伐他汀个体化用药的临床研究

目的 研究是否采纳基于ABCB1（2677T>G）基因多态性所给出的个体化用药建议对患者调脂疗效的影响。方法 回顾性选取2020年12月-2022年12月河南理工大学第一附属医院住院高脂血症患者85例作为研究对象,患者均经过阿托伐他汀或瑞舒伐他汀连续治疗4周,采用荧光原位杂交法测定ABCB1（2677T>G）基因多态性。按照是否采纳基于ABCB1（2677T>G）基因多态性所给出的个体化用药建议将85例患者分为采纳建议组和未采纳建议组,采纳建议组中TT、GT型患者均服用瑞舒伐他汀,GG型患者均服用阿托伐他汀;未采纳建议组中TT、GT型患者均服用阿托伐他汀,GG型患者均服用瑞舒伐他汀。比较两组患者治疗前后的血脂变化率,观察是否采纳基于ABCB1（2677T>G）基因多态性所给出的个体化用药建议对患者调降脂治疗的影响。结果 85例患者中ABCB1（2677T>G）基因频率分别为GG （25例）29.41%、GT （33例）38.82%、TT （27例）31.77%,ABCB1（2677T>G）基因型分布符合Hardy-Weinberg遗传平衡。治疗前,采纳建议组与未采纳建议组患者的总胆固醇（TC）、低密度脂蛋白-胆固醇（LDL-C）、高密度脂蛋白-胆固醇（HDL-C）没有显著差异。治疗后,两组患者的TC、LDL-C变化率有极显著差异（P<0.001）,而HDL-C变化率差异无统计学意义（P>0.05）。TT型患者治疗后的HDL-C变化率有显著差异（P<0.05）;GT型患者治疗后,TC、HDL-C变化率均有显著差异（P<0.05）,LDL-C变化率差异具有显著统计学意义（P<0.01）;GG型患者治疗后,TC变化率有显著差异（P<0.05）,LDL-C水平变化率的差异具有显著统计学意义（P<0.01）,但HDL-C水平变化率的差异不具有统计学意义（P>0.05）。结论 采纳基于ABCB1（2677T>G）基因多态性所给出的个体化用药建议的患者,其在降低TC、LDL-C水平方面的效果明显优于未采纳建议的患者。     

ABCB1 G2677T基因多态性检测在缺血性脑卒中患者应用阿托伐他汀降脂治疗中的价值

目的：探讨三磷酸腺苷结合盒转运体B1(ABCB1)G2677T基因多态性检测在缺血性脑卒中患者应用阿托伐他汀降脂治疗中的价值。方法：本研究为前瞻性研究。连续招募116例缺血性脑卒中患者作为受试者,采用荧光染色原位杂交技术检测受试者ABCB1 G2677T(rs2032582)基因多态性,依据基因检测结果将患者分为GG基因型、GT基因型和TT基因型三组。三组患者均给予阿托伐他汀20 mg/d降脂治疗,重复测量资料方差分析比较治疗前及治疗1个月后三组受试者血清高密度脂蛋白(high density lipoprotein cholesterol,HDL-C)、低密度脂蛋白(low density lipoprotein cholesterol,LDL-C)、总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)水平的变化,以血清LDL-C水平<1.8 mmol/L为降脂治疗有效,比较三组治疗有效率的差异。记录三组药品不良反应发生情况。结果：GG基因型、GT基因型和TT基因型三组分别有47例(40.5%)、43例(37.1%)和26例(22.4...     

SLCO1B1 521 T>C和APOE基因多态性对阿托伐他汀调脂疗效及安全性的影响

目的 研究缺血性脑卒中伴血脂异常患者SLCO1B1 521 T>C和APOE基因多态性对阿托伐他汀临床疗效及安全性的影响。方法 收集上海市浦东新区公利医院2018年4月至2018年12月收治的缺血性脑卒中伴血脂异常的患者210例,测定纳入患者SLCO1B1 521 T>C和APOE基因多态性,给予阿托伐他汀20 mg/d口服进行降脂或调脂治疗,于治疗前和治疗后3个月测定其TC、TG、HDL-C、LDL-C水平来评价疗效,测定TBil、ALT、AST、CK水平,以及根据不良反应来评价安全性。结果 SLCO1B1 521 T>C的基因型分布为TT 79.05%,TC 19.05%,CC 1.90%;APOE基因的E2、E3、E4等位基因频率分别为14.28%、67.62%、18.10%,各基因型符合Hardy-Weinberg平衡定律。服药3个月后,APOE不同基因型患者TC、TG、LDL-C、HDL-C变化有显著性差异（P<0.01）。各项安全性指标未发现明显异常。SLCO1B1 521 T>C突变组肌痛发生率高于野生组,有显著性差异（P<0.01）。结论 APOE基因多态性影响阿托伐他汀的调脂疗效,患者SLCO1B1 521 T>C基因可能与阿托伐他汀肌痛不良反应相关。检测SLCO1B1和APOE基因分型有助于血脂个体化治疗,为药物治疗管理患者他汀类药物合理使用提供依据。     

缺血性脑卒中患者SLCO1B1和ApoE基因多态性对阿托伐他汀疗效和安全性的影响

目的：分析缺血性脑卒中患者SLCO1B1和ApoE基因的分布情况,探讨其单核苷酸多态性（SNPs）对阿托伐他汀降脂疗效和安全性的影响。方法：选择2018年1-12月某院收治的160例缺血性脑卒中患者,应用PCR荧光探针法对患者SLCO1B1基因的388A>G、521T>C位点和ApoE基因的526C>T、388T>C位点的多态性进行检测。入选患者均口服阿托伐他汀20 mg·d^-1,通过检测用药前及用药后30 d患者的总胆固醇（TC）、甘油三酯（TG）、低密度脂蛋白胆固醇（LDL-C）、高密度脂蛋白（HDL-C）水平,评价阿托伐他汀的降脂疗效;通过检测用药前及用药后30 d患者血清肌酐（Cr）、谷丙转氨酶（ALT）、谷草转氨酶（AST）、肌酸激酶（CK）水平,评价阿托伐他汀的安全性。结果：缺血性脑卒中患者SLCO1B1 388A>G和521T>C等位基因频率分别为73.75%和10.62%,ApoE基因的e2、e3和e4等位基因频率分别为7.50%、80.00%和12.50%,各基因型符合Hardy-Weinberg平衡定律。SLCO1B1（TC+CC）组患者给药30 d后LDL-C明显降低,CK明显升高,与TT组差异有统计学意义（P<0.05）。SLCO1B1 388A>G和ApoE SNPs对降脂疗效和安全性的差异无统计学意义（P>0.05）。结论：SLCO1B1 521C等位基因增强阿托伐他汀的降脂作用,尤其对LDL-C效果明显,但会增加肌病的风险。ApoE SNPs对阿托伐他汀的降脂疗效及安全性无显著影响。     

SLCO1B1和APOE基因多态性对瑞舒伐他汀疗效及安全性的影响

目的 探讨SLCO1B1和APOE基因多态性对瑞舒伐他汀疗效及安全性的影响。方法 入选2020年10月至2021年10月服用瑞舒伐他汀的冠心病患者300例,根据瑞舒伐他汀服用剂量分为10 mg组及20 mg组,每组150例。检测患者SLCO1B1和APOE基因型,监测患者用药前、用药1、3和6个月后的血脂水平指标,并随访其6个月内肌肉、肝脏和神经系统等不良反应发生情况。结果 SLCO1B1 388A>G、521T>C与APOE 526C>T、388T>C的突变率分别为71.7%、13.8%、7.8%和10.5%。20 mg组中,携带SLCO1B1 521T>C突变或*15突变的患者的肌肉不良反应发生率高于非携带者（P<0.05）,但在10 mg组中差异无统计学意义（P> 0.05）。在全部患者组中,携带APOE 526C>T突变患者总胆固醇（TC）及低密度脂蛋白胆固醇（LDL-C）降低水平显著高于野生型患者（P <0.05）,携带APOE 388T>C突变患者TC及LDL-C降低水平显著低于野生型患者（P <0.05）,...     

载脂蛋白B基因多态性对阿托伐他汀调脂疗效的影响

目的:观察载脂蛋白B(ApoB)基因多态性对低剂量阿托伐他汀调脂疗效的影响。方法:选择高脂血症患者211例,其中67例服用阿托伐他汀10mg,每晚1次;于治疗前及治疗开始后第4、8、12周抽血实验室检查血脂指标。采用聚合酶链式反应-限制性片段长度多态性(PCR-RFLPs)方法检测ApoB基因XbaⅠ酶切位点基因多态性。结果:211例高脂血症患者中,X+等位基因相对频率为0.0853,X-等位基因相对频率为0.9147。服用阿托伐他汀4周后,携带X+X-基因型患者的总胆固醇(TC)降低百分率较X-X-基因型患者少(14.98%vs.19.39%,P<0.05)。结论:阿托伐他汀对携带X+等位基因的高脂血症患者的调脂疗效减弱。     

SLCO1B1基因多态性与阿托伐他汀的安全性及有效性相关性分析

目的 研究高脂血症患者SLCO1B1基因多态性与阿托伐他汀安全性及有效性的相关性。方法 收集金华市人民医院2017年4月—2018年4月在门诊确诊为高脂血症患者的基本资料,测定纳入患者的SLCO1B1 c.388A>G和c.521T>C的基因多态性,定期随访受试者,并定期测定其甘油三酯、胆固醇、低密度脂蛋白胆固醇及肌酸激酶等相关实验室检查指标。结果 纳入患者SLCO1B1 c.388A>G和c.521T>C等位基因频率分别为72.8%和15.9%。随访期结束后不同基因型患者的血清血脂指标变化率无明显差异。SLCO1B1 c.521T>C基因多态性与阿托伐他汀的安全性有相关性（P=0.005）。结论 SLCO1B1c.388A>G基因多态性对阿托伐他汀降脂疗效及安全性无影响。SLCO1B1 c.521T>C基因多态性与阿托伐他汀的降脂疗效无相关性,但对其安全性有一定影响。     

Relationship between the C3435T and G2677T(A) polymorphisms in the ABCB1 gene and P-glycoprotein expression in human liver

AIMS: The aim of the study was to determine whether a correlation exists between MDR1 (ABCB1) gene polymorphisms at positions 3435 (C3435T) and 2677 (G2677T(A)) and the expression of human hepatic P-glycoprotein (P-gp). METHODS: P-gp protein expression in 26 human livers was assessed by Western blotting and ABCB1 mRNA expression was determined by real time RT-PCR. The C3435T and G2677T(A) polymorphisms were identified by RFLP and direct sequence analysis, respectively. RESULTS: The C and G allele frequencies for the C3435T and G2677T(A) polymorphisms were 0.48 and 0.79, respectively, and the genotypes were in Hardy-Weinberg equilibrium. There was a 200- and 20-fold variation in the expression of ABCB1 mRNA and Pgp protein expression, respectively. There were no differences in mRNA and protein expression identified amongst the different genotypes attributable to the C3435T and G2677T(A) polymorphisms in the ABCB1 gene. Exposure to a PXR ligand prior to death did not influence mRNA or protein expression. CONCLUSIONS: There is substantial variability in the expression of Pgp in human liver, but this is not due to the presence of C3435T and G2677T(A) polymorphisms in the ABCB1 gene, although our study is limited by a small sample size.     

6种药物对有机阴离子转运多肽OATP1B1及其基因多态性A388G、T521C转运作用的影响

目的 研究6种药物对有机阴离子转运多肽OATP1B1及其基因多态性A388G、T521C转运作用的影响。方法 体外培养稳定高表达OATP1B1和OATP1B1基因多态性A388G、T521C的人胚肾细胞（HEK293）株,高表达空白载体（Mock）的HEK293细胞为空白对照,实时荧光定量PCR（qRT-PCR）法检测各转运体细胞中mRNA表达;放射性标记化合物³Hestrone sulfate作为转运底物、利福平作为阳性抑制剂验证各高表达细胞的转运活性;测定30 μmol·L^-1的达比加群、辛伐他汀、替格瑞洛、卡培他滨、多西他赛、依那普利对各细胞³H-estrone sulfate摄入活性的抑制作用,并依据抑制试验结果,进一步测定辛伐他汀、替格瑞洛、多西他赛对转运体细胞的半数抑制浓度（IC₅₀）。结果 HEK293细胞内导入的各种转运体基因都呈现良好的复制表达;OATP1B1、OATP1B1/A388G、OATP1B1/T521C对底物³H-estrone sulfate（5 μmol·L^-1）的转运活性分别为Mock细胞的39、49和48倍,30 μmol·L^-1利福平添加后,可将细胞的转运活性抑制到50%以下;辛伐他汀、替格瑞洛、多西他赛对OATP1B1的抑制作用较强,30 μmol·L^-1给药的转运活性分别为对照组的（40.09±1.95）%、（33.82±0.61）%、（45.08±0.22）%;辛伐他汀对OATP1B1、OATP1B1/A388G、OATP1B1/T521C的IC₅₀分别为14.2、＞100、＞100 μmol·L^-1,替格瑞洛的IC₅₀分别为19.1、68.4、＞100 μmol·L^-1,多西他赛的IC₅₀分别为17.6、22.9、19.3 μmol·L^-1。结论 OATP1B1基因多态性在一定程度上改变了抑制剂对转运体活性的影响程度。     

Effect of SLCO1B1 genetic polymorphism on the pharmacokinetics of nateglinide

AIMS: Nateglinide is a meglitinide analogue with antidiabetic action. A recent study showed that SLCO1B1 (which codes the OATP1B1 gene, also known as OATP-C, OATP2) is a major determinant which markedly affects the pharmacokinetics of repaglinide. Our objective was to assess the association between single nucleotide polymorphisms (SNPs) of SLCO1B1 and the pharmacokinetics of nateglinide. METHODS: Seventeen healthy volunteers with different SLCO1B1 genotypes (11 with 521TT, four with 521TC and two with 521CC) were enrolled in this study. Each was given a single oral dose of 90 mg nateglinide. Plasma concentrations of nateglinide were measured up to 8 h by HPLC. RESULTS: The C(max) and AUC(0,infinity) of nateglinide were 83% (P = 0.002) and 82% (P = 0.001) higher in the SLCO1B1521TC subjects (n = 4), and 76% (P = 0.016) and 108% (P = 0.001) higher in the SLCO1B1521CC subjects (n = 2) than in the SLCO1B1521TT subjects (n = 11), respectively. The t(1/2) of nateglinide in SLCO1B1521CC subjects was 78% longer than that in 521TT subjects (P = 0.036). The difference in t(max) values among the three genotypic groups was not statistically significant. CONCLUSIONS: Our results suggest that OATP1B1-mediated hepatic uptake of nateglinide may be the prior step for its metabolism and elimination. SLCO1B1521T > C SNP might play an important role in the pharmacokinetics of nateglinide.     

Effects of CYP3A5 genotypes,ABCB1 C3435T and G2677T/A polymorphism on pharmacokinetics of Tacrolimus in Chinese adult liver transplant patients

Abstract

1.?The purpose of this study was to establish a population pharmacokinetic (PK) model of tacrolimus and evaluate the influence of clinical covariates, including the genetic polymorphisms of the cytochrome P450 3A5 gene (CYP3A5) and gene-encoding P-glycoprotein (ABCB1), on the PK parameters in Chinese adult liver transplant recipients.

2.?Details of drug dose, sampling times and concentrations were collected retrospectively from routine therapeutic drug monitoring data early after liver transplant. Tacrolimus PKs was studied by a non-linear mixed-effect modeling (NONMEM) method. CYP3A5 genotypes, ABCB1 C3435T and G2677T/A polymorphism and a number of clinical covariates were tested for their influence on TAC PKs.

3.?A one-compartment model with first-order absorption and elimination adequately described the data. Apparent clearance (CL/F) and apparent volumes of distribution (V/F) in final population model were 17.6?L/h and 225?L, respectively. The absorption rate constant (K_a) was fixed at 4.48?h^?1. The inter-individual variability in CL/F and V/F was 53.9 and 68%, respectively. In the final model, CYP3A5 genotype, post-operative day, alanine aminotransferase, total bilirubin, hematocrit and blood urea nitrogen were found to significantly influence the CL/F, whereas POD and HB influence V/F.

4.?Population PK analysis of tacrolimus in Chinese adult liver transplant patients resulted in identification of the CYP3A5 genotype, POD, BUN, ALP, HCT, TBIL and HB as significant covariates on the PK parameters of tacrolimus.     

SLCO1B1 521T-->C functional genetic polymorphism and lipid-lowering efficacy of multiple-dose pravastatin in Chinese coronary heart disease patients

AIMS: Pravastatin is a 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor, which is widely used both in primary and secondary prevention of coronary heart disease (CHD). Pravastatin is not subject to metabolism by cytochrome P450s, but it is actively transported from blood into target tissues (e.g. hepatocytes in the liver) by the organic anion transporting polypeptide 1B1 (OATP1B1), encoded by SLCO1B1. The aim of the present study was to evaluate the impact of SLCO1B1 521T-->C (Val174Ala) functional genetic polymorphism on the lipid-lowering efficacy of multiple-dose pravastatin in Chinese patients with CHD. METHODS: Forty-five hospitalized patients with CHD prospectively received pravastatin as a single-agent therapy (20 mg day(-1) p.o.) for 30 days. Serum triglycerides, total cholesterol, low-density lipoprotein-cholesterol and high-density lipoprotein-cholesterol concentrations were determined before and after pravastatin treatment. RESULTS: Pravastatin treatment significantly decreased plasma lipids in all patients (P < 0.001). Importantly, we showed an attenuated pravastatin pharmacodynamic effect on total cholesterol in patients with 521TC heterozygote genotype (from 5.52 +/- 0.51 mmol l(-1) to 4.70 +/- 0.35 mmol l(-1), % change -14.5 +/- 6.6%, N = 9) compared with 521TT homozygote genotype (from 5.47 +/- 1.15 mmol l(-1) to 4.21 +/- 0.89 mmol l(-1), % change -22.4 +/- 10.3%, N = 36) (mean +/- SD, P = 0.03, two-tailed test with alpha set at 5%). SLCO1B1 521T-->C functional polymorphism did not significantly influence pravastatin pharmacodynamics on other plasma lipids (P > 0.05). CONCLUSIONS: The 521T-->C polymorphism of SLCO1B1 appears to modulate significantly the total cholesterol-lowering efficacy of pravastatin in Chinese patients with CHD. Further studies are warranted to determine the extent to which SLCO1B1 genetic variation may contribute to resistance to pravastatin in Asian patients treated with standard doses of pravastatin.