CYP3A5~*3和CYP3A4~*18B基因多态性对肾移植患者环孢素药代动力学的影响

目的回顾性研究肾脏移植后1mon,CYP3A5*3和CYP3A4*18B基因多态性对CsA药代动力学参数的影响。方法采用PCR-RFLP方法分析了63名肾脏移植患者CYP3A5*3和CYP3A4*18B基因型;荧光偏正免疫法用于检测肾移植患者静脉全血中的CsA浓度。结果在63名肾移植患者中,CYP3A5*3和CYP3A4*18B突变等位基因发生频率分别为0.770(95CI:0.767～0.773),0.235(95CI:0.235～0.241),而且这些等位基因表现出完全连锁不平衡。在移植术后1mon内,携带CYP3A4*1/*1野生型纯合子患者的C0以及剂量校正谷血浓度(C0/D)均明显高于携带CYP3A4*1/*18B杂合子或CYP3A4*18B/*18B突变型纯合子患者(P<0.05,Mann-WhitneyUtest);CYP3A5*1/*1基因型组的给药剂量明显高于CYP3A5*1/*3或CYP3A5*3/*3基因型组(P=0.004<0.01,Kruakal-Wallistest);CYP34*18B和CYP3A5*3联合考虑,对于CYP3A5表达组,同样发现C0、C0/D在CYP3A4*1/*1组C0以及C0/D均明显高于CYP3A4*1/*18B或CYP3A4*18B/*18B组(P<0.05,Mann-WhitneyUtest);而其他药动学参数在CYP3A5*3及CYP3A4*18B各组间相比差异则没有统计学意义。结论CYP3A5*3和(或)CYP3A4*18B基因多态性对肾移植后1monCsA药代动力学有一定影响,移植前CYP3A5*3基因型的分析仍需进一步研究。     

CYP3A基因多态性与肾移植术后不同时期环孢素浓度剂量个体差异的相关性研究

摘 要 目的：探讨肾移植受者口服免疫抑制药环孢素(CsA)浓度剂量的个体差异与代谢酶CYP3A4/5基因多态性的关系。 方法: 应用连接酶检测反应法分析221例肾移植受者CYP3A4 rs4646437C>T和CYP3A5 6986G>A基因型,考察其对术后服用CsA后6个月内、6～24个月、超过24个月的CsA体质量校正剂量谷浓度(C0/D)和服药2h后浓度(C2/D)的影响。结果: 不同CYP3A5 6986G>A基因型移植术后6个月内、6～24个月、24个月后C0/D均有统计差异（P<0.05）,C0/D值CYP3A5 6986GG>GA>AA。不同基因型CYP3A4 rs4646437C>T、CYP3A5 6986G>A在移植术后24个月以上C2/D均有明显差异（P<0.05）,C2/D值CYP3A4 CC>CT>TT,CYP3A5 GG>GA>AA。结论:不同CYP3A5 6986G>A基因型影响移植受者的C0/D和C2/D;不同CYP3A4 rs4646437C>T基因型影响移植受者的C2/D,可作为移植术后CsA个体化用药的参考指标。移植后用药时间不同,基因型对C0/D和/或C2/D的影响也不同。     

CYP3A5 6986A>G基因多态性与中国肾移植术后患者环孢素A血药浓度相关性的Meta分析

目的:系统评价CYP3A5 6986A>G基因多态性与中国肾移植术后患者环孢素A(CsA)血药浓度的相关性。方法:计算机检索Cochrane图书馆、PubMed、Embase、中国生物医学文献数据库、中国期刊全文数据库、维普数据库、万方数据库等,收集肾移植术后使用CsA免疫抑制治疗并进行血药浓度监测的中国患者的病例对照研究或队列研究。筛选文献、提取资料后,采用纽卡斯渥太华量表评分对纳入文献质量进行评价,采用Rev Man 5.3软件进行Meta分析。结果:共纳入8篇文献,均为队列研究,共计890例患者。Meta分析结果显示,CYP3A5*1/*1型患者CsA剂量校正后的谷浓度(C0/D)显著低于CYP3A5*1/*3型[MD=-6.97,95%CI(-13.18,-0.76),P=0.03];亚组分析结果显示,肾移植术后CsA检测时间≤1个月时[MD=-8.50,95%CI(-12.57,-4.43),P<0.000 1]、检测时间>1~<6个月时[MD=-14.02,95%CI(-26.28,-1.76),P=0.02]CYP3A5*1/*1型患者CsA的C0/D均显著低于CYP3A5*1/*3型患者。CYP3A5*1/*3型患者CsA的C0/D显著低于CYP3A5*3/*3型患者[MD=-6.04,95%CI(-8.99,-3.09),P<0.000 1];亚组分析结果显示,肾移植术后CsA检测时间≤1个月时CYP3A5*1/*3型患者CsA的C0/D显著低于CYP3A5*3/*3型[MD=-6.94,95%CI(-10.21,-3.68),P<0.000 1]。CYP3A5*1/*1型患者CsA的C0/D显著低于CYP3A5*3/*3型[MD=-12.64,95%CI(-21.09,-4.20),P=0.003];亚组分析结果显示,肾移植术后CsA检测时间≤1个月时[MD=-16.69,95%CI(-24.03,-9.36),P<0.000 01]、检测时间>1~<6个月时[MD=-16.78,95%CI(-28.63,-4.93),P=0.006]CYP3A5*1/*1型患者Cs A的C0/D显著低于CYP3A5*3/*3型。CYP3A5*1/*1型与CYP3A5*1/*3型、CYP3A5*1/*3型与CYP3A5*3/*3型、CYP3A5*1/*1型与CYP3A5*3/*3型患者CsA剂量校正后的峰浓度比较,差异均无统计学意义。结论:CYP3A5 6986A>G基因多态性与中国肾移植术后患者CsA的C0/D具有一定的相关性,且在肾移植术后CsA检测时间≤1个月时的大小顺序为CYP3A5*1/*1型1~<6个月时为CYP3A5*1/*1型相似文献   

钙通道阻滞剂对肾移植患者环孢素血药浓度/剂量的影响与CYP3A5基因多态性有关

目的:研究CYP3A5基因多态性对合用钙通道阻滞剂(CCBs)患者环孢素(CsA)血药浓度/剂量(C/D)的影响。方法:利用聚合酶链式反应-限制性片段长度多态性(PCR-RFLP)分析技术对69例肾移植患者CYP3A5基因进行分型,研究患者在合用CCBs后CsAC/D的差异及与CYP3A5基因型的关系。结果:CYP3A5基因型为*1/*1、*1/*3和*3/*3型的患者分别有8例、23例和38例。肾移植患者的CYP3A5A6986G多态性(CYP3A5*3)发生频率为71.74。未用CCBs的CYP3A5*1/*3和CYP3A5*3/*3患者其CsAC/D分别是野生型患者的1.73倍和2.43倍,CYP3A5*1/*1、*1/*3型患者在合用CCBs前后CsA的C/D明显提高(19.90±7.66vs36.01±8.18,34.33±7.87vs46.16±9.63ng.mL-1permg.kg-1;P<0.01,P<0.05),而CYP3A5*3/*3型患者CsA的C/D无明显变化(48.27±10.60vs46.42±9.24ng.mL-1permg.kg-1)。结论:CCBs对肾移植患者CsA的C/D的...     

细胞色素P4503A5~*3基因多态性与环孢素所致肝损伤相关性的评价

目的系统评价细胞色素P450 3A5*3(CYP3A5*3)基因多态性与环孢素所致的肝损伤的相关性。方法系统检索Pub Med、MedLine、EMbase、Cochrane图书馆、维普数据库、中国知网和万方数据库,查找CYP3A5*3基因多态性与环孢素致患者肝损伤相关性的研究,检索时间自各数据库建库至2016年3月。试验组为环孢素致肝损伤患者,对照组为无肝损伤患者或其他原因致肝损伤患者。用Rev Man 5. 2. 0软件进行Meta分析。结果共纳入病例对照研究3篇(包括英文1篇和中文2篇),患者807名。患者的基因型分布均符合Hardy-Weinberg平衡定律。试验组和对照组CYP3A5*3AA型的分布率分别为21. 70%(87例/401例)和22. 36%(91例/407例),差异有统计学意义(P <0. 01)。试验组和对照组中携带等位基因A的分布率分别为21. 20%和32. 89%,携带等位基因G的分布率分别为78. 80%和67. 11%,差异均无统计学意义(均P> 0. 05)。结论 CYP3A5*3基因多态性与环孢素致患者肝损伤相关,其中携带CYP3A5*3AA基因型的患者服用环孢素所致肝损伤的发生率较低,而此发生率与等位基因A和G的分布无关。     

肾移植病人中CYP3A4基因多态性对环孢素A代谢的影响

目的 用基因分析技术对CsA代谢酶CYP3A4进行基因分型,以阐述CYP3A4基因多态性对环孢素A代谢的影响及相互关系,从而预测血药浓度及安全性。方法 用聚合酶链反应结合限制性片段长度多态性分析法分别建立了CYP3A的CYP3A4基因亚型3个新突变点(CYP3A4~*4,~*5,~*6)的基因分型方法,并对中国肾移植人群进行基因分型,同时测定CsA及其代谢物浓度,以原形药与代谢物浓度的比值MR作为表型验证指标。结果CYP3A4~*4,*~5,*~6等位基因在中国肾移植人群中的突变率为:2/133,3/197,3/200。野生型病人中肝肾功能正常和异常者测得MR均值分别为0.47±0.13和0.82±0.21。3种突变型病人MR均值为0.90±0.30。结论CYP3A4~*4,~*5,~*6等位基因的存在有可能降低了药物代谢酶CYP3A4的活性,从而使环孢素A的代谢减慢。     

CYP3A4,CYP3A5和MDR1基因多态性对环孢素处置的影响

环孢素是一个广泛用于器官移植患者的免疫抑制剂,具有治疗指数窄,不同个体间药代动力学差异较大的特点。它主要通过肝脏和小肠的CYP3A4和CYP3A5代谢;同时它又是药物转运体的底物。不同个体间药物代谢酶和转运体活性的差异可能是造成不同器官移植患者环孢素药代动力学差异的主要原因。而遗传因素即编码药物代谢酶和转运体基因序列的差异可能是其产生活性差异的分子机制。因此,从编码药物代谢酶和转运体的基因入手,可能会为器官移植患者提供最优的治疗方案。     

CYP 3A5*3基因多态性对肾移植术后他克莫司药代动力学的影响

目的探讨CYP3A5*3基因多态性对肾移植术后他克莫司(免疫抑制药)剂量校正给药2h后浓度的影响。方法选取61例肾移植术后患者,用聚合酶链式反应-限制性片段长度多态性的方法,分析CYP 3A5*3基因型;用微粒酶联免疫吸附法,测定患者他克莫司浓度。并分析CYP 3A5*3基因多态性与他克莫司给药剂量、给药2h浓度(C2)及剂量校正给药2h后浓度(C2/D)的相关性。结果肾移植术后1周及1、3个月,CYP 3A5*1/*1 CYP 3A5*1/*3组和CYP3A5*3/*3组他克莫司剂量比较均无显著性差异。术后1周和1个月,2组间他克莫司C2比较无显著性差异;术后3个月,CYP 3A5*1/*1 CYP 3A5*1/*3组的C2显著低于CYP 3A5*3/*3组(P<0.05)。术后1周及1、3个月,CYP 3A5*1/*1 CYP 3A5*1/*3组的C2/D均明显低于CYP 3A5*3/*3组(P<0.05)。结论肾移植术后,他克莫司C2/D的个体化差异与患者CYP3A5*3基因型密切相关。     

肾移植患者的CYP3A4基因型与体内环孢素浓度相关性评价

目的:评价肾移植患者的CYP3A4基因型与体内环孢素浓度相关性.方法:采用特异性荧光偏振免疫法,测定肾移植患者677例(7个民族)次术后不同时间点的体内全血环孢素浓度,利用CYP3A4芯片检测387例患者的CYP3A4酶的基因型,分组(移植术后时间0～1,1～2,2～3,3～4,4～5,5年以上)计算每次用药剂量及血药浓度均值和标准差.结果:12例(汉族)的CYP3A4基因型为突变型,突变率为3.1%.其中8例突变型患者(基因位点13989A→G*4,15820C→15820 G*5)的每公斤体重用药剂量显著高于野生型的患者(P＜0.05);4例基因位点-444T→G*1C和21973C→21973T*11发生改变的突变型患者用药剂量与野生型患者的用药剂量无显著差异.结论:CYP3A4基因位点突变13989A→G*4,15820C→15820 G*5的肾移植患者服用环孢素的剂量应加大.     

CYP3A5~* 3基因多态性与辛伐他汀稳态血药浓度及降脂疗效的相关性

<正>辛伐他汀(simvastatin)主要用于降血脂及预防心脑血管疾病。辛伐他汀口服后体内转化为辛伐他汀酸,而80%以上的辛伐他汀酸由肝微粒体中CYP3A4/5代谢。有研究表明~([1-2]),辛伐他汀在体内作用受到CYP3A5基因的影响。因此,研究CYP3A5基因变异对辛伐他汀的药动学和药效学的     

Influence of CYP3A5 genetic polymorphism on cyclosporine A metabolism and elimination in Chinese renal transplant recipients

AIM: To investigate whether the CYP3A5*3 polymorphism would affect cyclosporine A (CsA) metabolism in Chinese renal transplant patients. METHODS: The CYP3A5*3 genotype was determined in Chinese renal transplant recipients using polymerase chain reaction and amplification of specific alleles (PCR-ASA). The concentrations of CsA and metabolites were separately measured by fluorescence polarization immunoassay and dose-adjusted trough concentrations and metabolic ratio (MR) values were calculated. RESULTS: The trough concentrations adjusted with the dose was significantly higher in the wild allele carriers compared to both the homozygous (*3*3) and heterozygous variants (*1*3). However, no significant difference was found for the dose-adjusted metabolite concentrations. The MR values for the 3 genotype groups were as follows: 0.92+/-0.62 for CYP3A5*3/ *3 (n=14), 0.99+/-0.51 for CYP3A5*1/*3 (n=15), and 1.45+/-0.62 for CYP3A5*1/*1 (n=9), respectively. Post hoc comparisons showed that only the MR values between the CYP3A5*3/*3 group and the CYP3A5*1/*1 group were significantly different. CONCLUSION: The CYP3A5*3 polymorphism exerted little effect on cyclosporine metabolism. The MR may be a more accurate indicator for therapeutic drug monitoring, considering its integrated information on body exposure of both parent drugs and metabolites.     

Association of MDR1, CYP3A4*18B, and CYP3A5*3 polymorphisms with cyclosporine pharmacokinetics in Chinese renal transplant recipients

Objective  The objective of this study was to retrospectively evaluate the effects of MDR1, CYP3A4*18B, and CYP3A5*3 genetic polymorphisms on cyclosporine A (CsA) pharmacokinetics in Chinese renal transplant patients during the first month after transplantation. Methods  A total of 103 renal transplant recipients receiving CsA were genotyped for MDR1 (C1236T, G2677T/A, and C3435T), CYP3A4*18B, and CYP3A5*3. The predose and 2-h postdose concentrations of CsA (C₀ and C₂, respectively) were determined by fluorescence polarization immunoassay, and their relationships with corresponding genotypes and haplotypes were investigated. Results  Patients with a CYP3A4*1/*1 genotype were found to have a higher dose-adjusted concentration compared with those with CYP3A4*18B/*18B, as follows: for C₂, 19.3% (P = 0.008) during days 8-15, 35.2% (P = 0.008) during days 16–30, and for C₀, 39.7% (P = 0.012) during days 16–30. The dose-adjusted C₀ was higher in patients with MDR1 1236CC compared with those with 1236TT in the first month postoperation. The dose-adjusted C₀ in patients with the CYP3A5*3/*3 genotype was 25.5% and 30.7% higher than those with the wild-type genotype during days 8–15 (P = 0.011) and days 16–30 (P = 0.015), respectively. Haplotype analysis revealed that the dose-adjusted C₀ was higher in the first month following surgery in carriers of haplotype MDR1 CAC than in noncarriers. Polymorphisms of MDR1 and CYP3A5*3 did not affect dose-adjusted C_2. Conclusion  The data suggests that the CYP3A4*18B genotype affects CsA pharmacokinetics during the first month following surgery in Chinese renal transplant recipients. Patients with CYP3A4*18B alleles may require higher doses of CsA to reach the target levels. Large prospective studies may be needed to further explore the impact of MDR1 and CYP3A5*3 polymorphisms on CsA pharmacokinetics in renal transplant recipients.     

CYP3A5*3基因多态性与肾移植患者围手术期他克莫司相关不良反应的关系

目的：明确细胞色素P450（Cytochrome P450,CYP）3A5*3基因多态性与肾移植患者围手术期他克莫司相关不良反应的关系。方法：选取2014年11月至2018年3月于某院行肾移植术且术后应用他克莫司的患者170例,检测其CYP3A5*3基因型,记录患者肾移植术后入院期间的用药情况、各项临床指标及他克莫司相关不良反应的发生情况。比较不同CYP3A5*3基因型患者间他克莫司相关不良反应发生率。结果：CYP3A5*1是肾移植患者发生他克莫司相关移植后高脂血症的保护因子,CYP3A5表达型患者发生移植后高脂血症的风险仅为非表达者的0.465倍（95% CI：0.217~0.996,P=0.049）。结论：CYP3A5*3基因多态性与肾移植患者发生他克莫司相关移植后高脂血症的风险显著相关,其机制可能与与CYP3A5非表达型患者对他克莫司的代谢能力较低,使其在体内积蓄有关。     

Association study of ABCB1 and CYP3A5 gene polymorphisms with sirolimus trough concentration and dose requirements in Chinese renal transplant recipients

The objective of this study was to investigate the possible association of the ABCB1 gene C3435 T polymorphism and the CYP3A5 gene A6986G polymorphism with sirolimus (SRL) trough concentration and dose requirements in Chinese stable renal transplant recipients. Blood samples were collected from 105 healthy volunteers and 50 renal transplant patients, whose polymorphisms of the ABCB1 and CYP3A5 genes were determined by polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP). Plasma concentrations of SRL were determined with HPLC. The allele frequencies of the ABCB1 mutation in Chinese healthy volunteers and renal transplant recipients were 51.0% and 44.0% (p>0.05), while the allele frequencies of the CYP3A5 mutation were 72.9% and 71.0% (p>0.05). The SRL concentration/dose ratio (C/D) in patients with CYP3A5 (*)3/(*)3 were significantly higher than that of those with (*)1 allele (p<0.05). However, no significant differences were observed between C/D and ABCB1 SNPs (p>0.05). These results confirm that when treated with a SRL-based therapy and low-dose steroids, patients carrying the CYP3A5(*)1 allele required significantly more SRL to achieve adequate blood trough concentrations. In patients with SRL-based therapy, genotyping of the CYP3A5 genes may help to optimize the SRL management in renal transplant recipients.     

肾移植受者CYP3A5基因多态性对他可莫司代谢的影响

目的研究CYP3A基因多态性对肾移植受者他可莫司代谢的影响。方法50例肾移植受者采用FK506＋霉酚酸酯＋强的松三联免疫抑制方案,FK506起始剂量0．15mg／（kg·d）,1w后根据目标血药浓度调整。CYP3A5基因多态性检测采用聚合酶链反应-限制性片段长度多态性（PCR—RFLP）方法,50例肾移植受者分为＊1／＊1型（12例）、＊1／＊3型（16例）、＊3／＊3型（22例）共3组。比较6个月内FK506的血药浓度／剂量比。结果 肾移植术后7天、1月、3月、6月＊3／＊3型患者FK506的血药浓度／剂量比显著高于＊1／＊1型和＊1／＊3型（P〈0．05）。结论由于CYP3A5基因多态性影响,＊1／＊1型组的患者早期难以达到有效FK506目标血药浓度,应该提高该组患者的起始用药剂量,根据CYP3A5基因多态性作为FK506个体化用药的依据,可以减少早期急性排斥反应,提高肾移植的临床效果。     

Influence of the MDR1 haplotype and CYP3A5 genotypes on cyclosporine blood level in Chinese renal transplant recipients

1. The purpose of the study was to elucidate the influence of multidrug resistance gene (MDR1) haplotype and CYP3A5 genotype on cyclosporine (CsA) blood level in Chinese renal transplant recipients.

2. CsA trough level (C₀) and peak level (C₂) of 115 patients 1 week and 1 month after renal transplantation were determined. MDR1 C1236T, G2677T/A, C3435T and CYP3A5*3 genotypes were determined by polymerase chain reaction (PCR) assays based on amplification refractory mutation.

3. Dose-adjusted C₀ (C₀/D), C₂ (C₂/D) were 50.5?±?22.5, 267.8?±?110.1 ng·kg·(ml·mg)^?1 after 1 week of therapy, and 79.3?±?29.4, 406.0?±?135.3 ng·kg·(ml·mg)^?1 after 1 month of therapy. Frequencies of MDR1 haplotype TTT, CGC, and TGC were 27.0%, 25.2% and 20.0%, respectively. After 1 month of therapy, C₂/D of TTT/TTT patients were 30% (p = 0.057) and 53% (p = 0.003) higher than CGC/TTT and CGC/CGC patients. C₀/D of CYP3A5 *1/*1, *1/*3 and *3/*3 patients after 1 month of therapy were 51.8?±?25.0, 71.5?±?27.6, and 86.7?±?28.6 ng·kg·(ml·mg)^?1 (p < 0.05).

4. MDR1 haplotypes and CYP3A5*3 genotypes can be related to C₂ and C₀ of CsA, respectively.

     

Prediction of tacrolimus metabolism and dosage requirements based on CYP3A4 phenotype and CYP3A5*3 genotype in Chinese renal transplant recipients

Aim:

To examine how the endogenous CYP3A4 phenotype and CYP3A5^*3 genotype of Chinese renal transplant recipients influenced the dose-corrected trough concentration (C₀/D) and weight-corrected daily dose (D/W) of tacrolimus.

Methods:

A total of 101 medically stable kidney transplant recipients were enrolled, and their blood and urine samples were gathered. The endogenous CYP3A4 phenotype was assessed by the ratio of 6β-hydroxycortisol and 6β-hydroxycortisone to cortisol and cortisone in urine. CYP3A5^*3 genotype was determined using PCR-RELP.

Results:

In overall renal transplant recipients, a multiple regression analysis including the endogenous CYP3A4 phenotype, CYP3A5^*3 genotype and post-operative period accounted for 60.1% of the variability in C₀/D ratio; a regression equation consisting of the endogenous CYP3A4 phenotype, post-operative period, body mass index, CYP3A5^*3 genotype, gender, total bilirubin and age explained 61.0% of the variability in D/W ratio. In CYP3A5^*3/^*3 subjects, a combination of the endogenous CYP3A4 phenotype, post-operative period and age was responsible for 65.3% of the variability in C₀/D ratio; a predictive equation including the endogenous CYP3A4 phenotype, post-operative period, body mass index, gender and age explained 61.2% of the variability in the D/W ratio. Base on desired target range of tacrolimus trough concentrations, individual daily dosage regimen was calculated, and all the observed daily doses were within the predicted range.

Conclusion:

This study provides the equations to predict tacrolimus metabolism and dosage requirements based on the endogenous CYP3A4 phenotype, CYP3A5^*3 genotype and other non-genetic variables.     

中国汉族儿童CYP3A5*3基因型与急性淋巴细胞白血病易感性的关联研究

目的:在中国汉族儿童中探讨白血病易感性与CYP3A5*3的频率之间的相关性.方法:共收集172名中国汉族儿童血液,包括52名急性白血病患者(27女性,25男性)和120名健康儿童(53女性,67男性).提取DNA,然后用PCR-RFLP方法检测基因型.结果:CYP3A5*3在人群中的分布符合Hardy-Weinberg平衡.儿童白血病中CYP3A5*3频率为0.721 (95％ CI:0.549,0.893),而健康儿童中为0.758 (95％CI:0.674,0.842),两者之间无明显差异,并且也无男女性别差异.结论:CYP3A5*3是健康儿童和白血病患者中的常见基因型,健康儿童和白血病患儿中CYP3A5*3频率一致, 因此CYP3A5*3与儿童白血病易感性之间无关联.