10种心血管类中药注射剂对人细胞色素P_(450)7种亚型的体外抑制作用

目的:研究10种心血管类中药注射剂对人细胞色素P450(CYP)7种亚型(CYP1A2、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6、CYP3A4/5)的体外抑制作用。方法:10种心血管类中药注射剂9个不同质量浓度的工作液分别与7种CYP亚型对应的混合探针药物在人肝微粒体中共同孵育,采用高效液相色谱-串联质谱(LC-MS/MS)法同时测定这7种探针药物的代谢产物,即对乙酰氨基酚(CYP1A2)、羟基安非他酮(CYP2B6)、去甲阿莫地喹(CYP2C8)、4-羟基双氯芬酸(CYP2C9)、4-羟基美芬妥英(CYP2C19)、右啡烷(CYP2D6)、1-羟基咪达唑仑(CYP3A4/5)的质量浓度,计算半数抑制浓度(IC50),并确定对CYP有抑制作用的中药注射剂。结果:CYP1A2、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6、CYP3A4/5的阳性抑制剂呋拉茶碱、塞替派、槲皮素、磺胺苯吡唑、噻氯匹定、奎尼丁和酮康唑对相应酶型均表现出明显抑制作用;10种心血管类中药注射剂中丹红注射液对CYP1A2、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6和CYP3A4/5均有明显抑制作用,红花注射液对CYP2C8有明显抑制作用。结论:在正常体积分数/质量浓度下,丹红注射液对人CYP 7种亚型在体外均有明显抑制作用;红花注射液对人CYP2C8在体外有明显抑制作用。     

黄连解毒汤对人细胞色素P450酶6个亚型的体外抑制作用研究

目的:研究黄连解毒汤对人肝微粒体6个亚型CYP1A2、CYP2C8、CYP2C9、CYP2C19、CYP2D6和CYP3A4的体外抑制作用。方法:采用液相色谱-串联质谱法(LC-MS/MS)同时测定对乙酰氨基酚、6α-羟基紫杉醇、4-羟基双氯芬酸、4-羟基美芬妥英、右啡烷、1-羟基咪达唑仑和6β-羟基睾酮,分别代表CYP1A2、CYP2C8、CYP2C9、CYP2C19、CYP2D6和CYP3A4的活性;黄连解毒汤提取物和7种混合探针底物在人肝微粒体中共同孵育,并计算其IC50值表示对CYP450酶的抑制程度。结果:在人肝微粒体体外孵育体系中,黄连解毒汤对CYP2D6的IC50值为3.54μg/mL,对CYP1A2的IC50值为10.8μg/mL,对CYP2C8、CYP2C9、CYP2C19、CYP3A4_T和CYP3A4_M亚酶的IC50值依次为67.7、299、530、199和607μg/mL。结论:在正常剂量下,黄连解毒汤对人肝微粒体CYP2D6和1A2可能有抑制作用,对人肝微粒体CYP2C8、CYP2C9、CYP2C19和CYP3A4无明显抑制作用。     

复方曲肽注射液对细胞色素P450酶活性的体内外影响

目的 考察复方曲肽注射液对细胞色素P450(CYP450)酶活性的体内外影响。方法 将人肝微粒体与复方曲肽注射液(体积分数0.05%～10%)和CYP1A2、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6、CYP3A4的特异性探针底物共孵育30 min,采用超高效液相色谱-串联质谱(UPLC-MS/MS)技术检测相应代谢产物的生成量,并计算半数抑制浓度(IC₅₀);将人原代肝细胞与复方曲肽注射液(体积分数0.05%～10%)或CYP1A2、CYP2B6、CYP3A4阳性诱导剂共孵育48 h后,采用实时荧光定量聚合酶链式反应法测定上述酶mRNA的相对表达量(即诱导倍数)。将雄性SD大鼠随机分为对照组(生理盐水+CYP1A2、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6、CYP3A4探针底物8、2、1、1、10、10、8mg/kg)和实验组(复方曲肽注射液0.9m L/kg+CYP1A2、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6、CYP3A4探针底物8、2、1、1、10、10、8 mg/k...     

20味中成药对5个人肝微粒体酶活性的影响

目的：考察六神丸等20个常用中成药对CYP1A2、CYP2C9、CYP2C19、CYP2D6和CYP3A4这5个人肝微粒体中主要的药物代谢酶的活性是否有影响。方法：采用人肝微粒体孵育法,分别采用非那西丁、甲苯磺丁脲、美芬妥因、氢溴酸右美沙芬和咪达唑仑作为5个酶的探针药物,采用液相色谱－质谱联用法测定了探针药物代谢产物的浓度,比较分别加入待测药物和空白缓冲液时代谢产物的初始生成速度。结果：六神丸对CYP1A2有明显抑制作用,IC50为28．75μg／mL;肝苏颗粒对CYP2C19有明显抑制作用,IC50为29．80μg／mL;丹参片对CYP1A2有明显抑制作用,IC50为48．55μg／mL;贝羚胶囊对CYP1A2有明显抑制作用,IC50为17．45μg／mL;复方夏天无片对CYP2D6有明显抑制作用,IC50为40．26μg／mL;丹参酮胶囊对CYP1A2、CYP2C9、CYP2C19、CYP2D6和CY173A4均有明显抑制作用,IC50分别为7．04、13．97、55．77、33．90μg／mL和34．57μg／mL;通风定胶囊对CYP2D6有明显抑制作用,IC铀为37．56μg／mL结论：所测定的多数中成药对药物代谢酶有明显的抑制作用,这些药物与药物代谢酶的底物药物联用发生药物相互作用的可能性较大,临床联合用药须谨慎。     

吡咯里嗪类非甾体抗炎药ML-3000衍生物对人P450同工酶的体外抑制作用

目的研究吡咯里嗪类ML-3000及其两种NO供体衍生物ML-4000和ML-5000对人P450同工酶CYP2D6、CYP1A2、CYP2C9、CYP2C19和CYP3A4的体外抑制作用。方法采用Gentest公司的高通量P450酶抑制剂筛选试剂盒（High throughput Inhibitor Screening Kit）,测定ML-3000、ML-4000和ML-5000对五种P450同工酶CYP2D6、CYP1A2、CYP2C9、CYP2C19和CYP3A4的体外抑制作用。结果 ML-3000、ML-4000和ML-5000抑制CYP3A4的IC50分别为7.07、0.40、2.82μmol/L,对其他4个酶（CYP1A2、CYP2D6、CYP2C9和CYP2C19）的IC50均大于10μmol/L。结论 3种化合物对CYP3A4活力均有抑制作用,其中ML-4000的抑制能力最强。3种化合物对其他4个酶基本没有抑制作用。     

瓜蒌皮注射液对人肝微粒体CYP450酶4种亚型的影响

目的研究瓜蒌皮注射液对人肝细胞色素P450(CYP450)酶4种亚型CYP1A2、CYP2B6、CYP2C9和CYP2D6的体外抑制作用。方法瓜蒌皮注射液8个不同浓度(2%、1%、0.2%、0.05%、0.01%、0.005%、0.002%、0.000 5%)的工作液分别与4种CYP450酶亚型的探针底物混合,即非那西丁(CYP1A2)、安非他酮(CYP2B6)、双氯芬酸(CYP2C9)、右美沙芬(CYP2D6),用维拉帕米作为内标,在人肝微粒体中孵育,采用高效液相色谱法检测4种探针底物的剩余浓度,计算半数抑制浓度(IC_(50))。结果瓜蒌皮注射液对CYP1A2、CYP2B6、CYP2C9和CYP2D6的IC_(50)值均大于临床常用量。结论正常用量下,瓜蒌皮注射液对人CYP450酶的4亚型无明显影响。     

体外系统性评价79种中药注射剂对9种人细胞色素P450酶的抑制作用

中药注射剂在临床经常与化学药物联用治疗多种复杂疾病,但其中药-药物的相互作用还没有得到充分的研究,有时甚至被临床忽视。本文研究国家食品药品监督管理局批准的79种中药注射剂,评价它们对人体药物代谢酶-细胞色素P450(CYP450)的潜在抑制作用。使用9种人CYP450s(包括CYP1A、CYP2A6、CYP2B6、CYP2C8、CYP2C9、CYP2C19、CYP2D6、CYP2E1和CYP3A)、特异性底物和中药注射剂共同孵育,使用灵敏度、准确度高的液相串联质谱(LC-MS/MS)对探针形成的代谢产物进行定量分析,评价79种中药注射剂对CYP450的体外抑制作用。在79种中药注射液中,当在中药注射液5%(v/v)和注射用粉针剂2倍日最大使用剂量换算浓度CMDD(mg·mL-1)筛选时有37种中药注射剂对CYP1A、24种中药注射剂对CYP2A6、41种中药注射剂对CYP2B6、36种中药注射剂对CYP2C9、41种中药注射剂对CYP2C19、41种中药注射剂对CYP2D6、25种中药注射剂对CYP2E1和42种中药注射剂对CYP3A表现出50%的抑制率或更强的抑制作用。在预孵育或与人肝微粒体共孵育30 min后,观察到2种中药注射剂对CYP1A、5种中药注射剂对CYP2A6、5种中药注射剂对CYP2B6、6种中药注射剂对CYP2C8、1种中药注射剂对CYP2D6、6种中药注射剂对CYP3A呈现时间依赖性抑制(TDI)作用。结果表明,中药注射剂存在基于CYP450的中药-药物相互作用及时间依赖性的中药-药物相互作用,需要临床医生用药提高警惕。     

中药有效成分对细胞色素P450酶的抑制活性评价

目的评价10个中药有效成分对人肝微粒体5种CYP同工酶(CYP1A2、2C9、2C19、2D6和3A4)的抑制活性,为临床合理用药提供参考。方法在混合人肝微粒体孵育体系中,分别以非那西丁O-脱乙基、甲苯磺丁脲4-羟基化、奥美拉唑5-羟基化、右美沙芬O-脱甲基化和咪达唑仑1'-羟基化反应为5种同工酶代谢活性的标志,用阳性抑制剂对试验体系进行验证。应用LC-MS检测受试物对探针底物代谢产物生成量的影响,得到抑制率并计算IC50。结果柚皮素是CYP2C19的强抑制剂和1A2的中等抑制剂(IC50为0.43和4.79μmol.L-1)。异鼠李素是CYP1A2、2C9和2C19的中等抑制剂,IC50分别为5.36、1.40和3.28μmol.L-1。大黄酸对CYP1A2和3A4的IC50分别为8.32和2.50μmol.L-1,为中等抑制剂。喜树碱是CYP2C9和2C19的中等抑制剂(IC50为2.01和2.48μmol.L-1)。金雀花碱、小檗碱和齐墩果酸抑制CYP2C9、2D6和2C19的IC50分别为8.13、4.69和3.56μmol.L-1,为中等抑制剂。结论柚皮素、异鼠李素、金雀花碱、盐酸小檗碱、喜树碱、大黄酸和齐墩果酸对CYP同工酶有不同程度的抑制作用,在临床应用时应注意可能的药-药相互作用。     

丹红注射液对大鼠肝微粒体5种CYP亚型酶活性的影响

摘要目的研究丹红注射液对5种细胞色素P450亚型酶活性的影响,为临床合理用药提供参考。方法采用大鼠体外肝微粒体孵育法,分别以非那西丁、甲苯磺丁脲、右美沙芬、氯唑沙宗、睾酮为CYP1A2、CYP2C9、CYP2D6、CYP2E1、CYP3A4的探针药物,在大鼠肝微粒体孵育体系中孵育,用高效液相色谱（HPLC）法测定相应的代谢产物,比较空白对照组和丹红注射液低、中、高剂量组之间探针药物代谢率的差异,评价丹红注射液对各亚型酶活性的影响。结果在体外肝微粒体孵育体系中,丹红注射液低剂量组中CYP1A2 和CYP2C9活性与空白对照组相比,差异无统计学意义（P＞0.05）;中和高剂量组中CYP1A2和CYP2C9活性与空白对照组相比降低,差异有统计学意义（P＜0.05或P＜0.01）;丹红注射液低、中、高剂量组中CYP2D6、CYP2E1、CYP3A4的活性与空白对照组相比,差异无统计学意义（P＞0.05）。丹红注射液对大鼠肝微粒体CYP1A2酶活性的半数抑制浓度（IC50）和抑制常数（Ki）分别为0.54%和0.226%。结论丹红注射液对大鼠肝微粒体CYP1A2酶活性有抑制作用,且为混合型抑制;对CYP2C9有弱抑制作用;对CYP2D6、CYP2E1、CYP3A4酶活性无明显影响。     

树豆酮酸A对人肝微粒体中5种常见细胞色素P450酶的体外抑制作用研究

目的:研究树豆酮酸A对人肝微粒体中的5种细胞色素P450(CYP)酶的体外抑制作用。方法:采用Cocktail探针药物法,在人肝微粒体中加入50.0、15.0、5.0、1.5、0.5、0.15、0.05μmol/L的树豆酮酸A,与混合探针药物[包含非那西丁、右美沙芬、奥美拉唑、睾酮、甲苯磺丁脲(分别为CYP1A2、CYP2D6、CYP2C19、CYP3A4、CYP2C9的探针药物)]共同孵育60 min。在另设空白组和阳性对照组[α-萘黄铜、奎尼丁、(+)-N-3-苄基香酚、酮康唑、磺胺苯吡唑(分别为CYP1A2、CYP2D6、CYP2C19、CYP3A4、CYP2C9的特异性抑制剂)]的基础上,以葛根素为内标,采用超高效液相色谱-质谱联用法(UPLC-MS/MS)分析相应代谢产物(对乙酰氨基酚、右啡烷、5-羟基奥美拉唑、6β-羟基睾酮、羟基甲苯磺丁脲)的含量。以ACQUITY UPLC■BEH C18为色谱柱,以0.01%甲酸水溶液-0.01%甲酸乙腈为流动相(梯度洗脱),柱温为40℃,流速为0.4 mL/min,进样量为2μL;采用电喷雾电离源,以多反应监测模式进行正负离子扫描,数据采集范围为m/z 100~1200,碰撞气为氩气,雾化气为氮气,锥孔气流量为50 L/h,脱溶剂气流量为800 L/h,正、负离子模式下毛细管电压分别为2.0、1.5 k V,离子源温度分别为120、110℃,脱溶剂的温度分别为400、450℃。使用Graphpad Prism 5.0软件进行非线性回归分析并计算半数抑制浓度(IC₅₀)。结果:上述各代谢产物检测浓度的线性范围分别为0.26~8.35、0.36~34.56、0.10~3.09、3.67~117.37、0.15~4.88μmol/L(R^2>0.99),定量下限分别为0.26、0.36、0.10、3.67、0.15μmol/L。阳性对照组特异性抑制剂对人肝微粒体中CYP1A2、CYP2D6、CYP2C19、CYP3A4、CYP2C9酶的IC50均在文献报道的可接受范围内。树豆酮酸A对人肝微粒体中CYP1A2、CYP2D6、CYP3A4酶的IC50值均大于50μmol/L,对CYP2C9、CYP2C19酶的IC50值分别为4.94、18.00μmol/L。结论:树豆酮酸A对人肝微粒体中CYP1A2、CYP2D6、CYP3A4酶没有抑制作用,对CYP2C9、CYP2C19酶有一定的抑制作用。     

Inhibition of human drug metabolizing cytochrome P450 by buprenorphine

The effects of buprenorphine, a powerful mixed agonist/antagonist analgesic, on several cytochrome P450 (CYP) isoform specific reactions in human liver microsomes were investigated to predict drug interaction of buprenorphine in vivo from in vitro data. The following eight CYP-catalytic reactions were used in this study: CYPlA1/2-mediated 7-ethoxyresorufin O-deethylation, CYP2A6-mediated coumarin 7-hydroxylation, CYP2B6-mediated 7-benzyloxyresorufin O-debenzylation, CYP2C8/9-mediated tolbutamide methylhydroxylation, CYP2C19-mediated S-mephenytoin 4-hydroxylation, CYP2D6-mediated bufuralol 1'-hydroxylation, CYP2E1-mediated chlorzoxazone 6-hydroxylation, and CYP3A4-mediated testosterone 6beta-hydroxylation. Buprenorphine strongly inhibited the CYP3A4- and CYP2D6-catalyzed reactions with Ki values of 14.7 microM and 21.4 microM, respectively. The analgesic also weakly inhibited specific reactions catalyzed by CYP1A1/2 (Ki=132 microM), CYP2B6 (Ki=133 microM), CYP2C19 (Ki=146 microM), CYP2C8/9 (IC50>300 microM), and CYP2E1 (IC50>300 microM), but not CYP2A6 mediated pathway. In consideration of the Ki values obtained in this study and the therapeutic concentration of buprenorphine in human plasma, buprenorphine would not be predicted to cause clinically significant interactions with other CYP-metabolized drugs.     

灯盏花素注射液对大鼠体外肝微粒体细胞色素P450酶活性的影响

摘 要 目的:研究灯盏花素注射液对大鼠肝微粒体CYP1A2、CYP2C9、CYP2D6、CYP2E1和CYP3A1/2 五个亚型酶活性的影响。方法: 采用大鼠肝微粒体体外孵育法,选用非那西丁（CYP1A2）、甲苯磺丁脲（CYP2C9）、右美沙芬（CYP2D6）、氯唑沙宗（CYP2E1）和睾酮（CYP3A1/2）作为5个亚型酶的探针药物,孵育系统中加入不同浓度的灯盏花素注射液,用HPLC法测定5个亚型酶探针药物代谢产物的生成量,比较空白对照组与不同浓度灯盏花素注射液给药组探针药物的活性,反映灯盏花素注射液对5个亚型酶活性的影响。结果:大鼠肝微粒体体外孵育系统中,灯盏花素注射液对大鼠CYP3A1/2的IC₅₀为29.40μg·ml^-1,K_i为37.78 μg·ml^-1;对CYP1A2、CYP2C9、CYP2D6和CYP2E1的IC₅₀＞200 μg·ml^-1。结论:灯盏花素注射液对大鼠体外肝微粒体CYP3A1/2有弱的抑制作用,对CYP1A2、CYP2C9、CYP2D6和CYP2E1活性无明显影响。     

Highly selective inhibition of human CYP3Aa in vitro by azamulin and evidence that inhibition is irreversible.

Azamulin [14-O-(5-(2-amino-1,3,4-triazolyl)thioacetyl)-dihydromutilin] is an azole derivative of the pleuromutilin class of antiinfectives. We tested the inhibition potency of azamulin toward 18 cytochromes P450 using human liver microsomes or microsomes from insect cells expressing single isoforms. In a competitive inhibition model, IC(50) values for CYP3A (0.03-0.24 microM) were at least 100-fold lower than all other non-CYP3A enzymes except CYP2J2 ( approximately 50-fold lower). The IC(50) value with heterologously expressed CYP3A4 was 15-fold and 13-fold less than those of CYP3A5 and CYP3A7, respectively. The reference inhibitor ketoconazole was less selective and exhibited potent inhibition (IC(50) values <10 microM) for CYP1A1, CYP1B1, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP4F2, and CYP4F12. Inhibition of CYP3A by azamulin appeared sigmoidal and well behaved with the substrates 7-benzyloxy-4-trifluoromethylcoumarin, testosterone, and midazolam. Preincubation of 4.8 microM azamulin in the presence of NADPH for 10 min inhibited approximately 95% of testosterone 6beta-hydroxylase activity compared with preincubation in the absence of NADPH. Catalytic activities of CYP1A2, CYP2C8, CYP2C9, CYP2C19, CYP2D6, and CYP2E1 were unaffected by similar experiments. Incubation of azamulin with heterologously expressed CYP3A4 yielded a type I binding spectrum with a spectral dissociation constant of 3.5 microM, whereas no interaction was found with CYP2D6. Azamulin exhibited good chemical stability when stored in acetonitrile for up to 12 days. Aqueous solubility was found to be >300 microM. Azamulin represents an important new chemical tool for use in characterizing the contribution of CYP3A to the metabolism of xenobiotics.     

In vitro sulfoxidation of thioether compounds by human cytochrome P450 and flavin-containing monooxygenase isoforms with particular reference to the CYP2C subfamily.

Cytochrome P450 (P450) and flavin-containing monooxygenase (FMO) enzymes are major catalysts involved in the metabolism of xenobiotics. The sulfoxidation of the thioether pesticides, phorate, disulfoton, sulprofos, and methiocarb, was investigated. Using pooled human liver microsomes (HLMs), thioether compounds displayed similar affinities; however, phorate and disulfoton displayed higher intrinsic clearance rates than either sulprofos or methiocarb. The sulfoxidation of thioethers by HLMs was found to be predominantly P450-driven (85-90%) compared with FMO (10-15%). Among 16 cDNA-expressed human P450 isoforms and 3 human FMO isoforms examined, the following isoforms and their polymorphisms had the highest rates for sulfoxidation, as follows: phorate, CYP1A2, 3A4, 2B6, 2C9*1, 2C18, 2C19, 2D6*1, and FMO1; disulfoton, CYP1A2, 3A4, 2B6, 2C9*1, 2C9*2, 2C18, 2C19, 2D6*1, and FMO1; sulprofos, CYP1A1, 1A2, 3A4, 2C9*1, 2C9*2, 2C9*3, 2C18, 2C19, 2D6*1, and FMO1; methiocarb, CYP1A1, 1A2, 3A4, 2B6, 2C9*1, 2C19, 2D6*1, and FMO1. Among these isoforms, members of the CYP2C subfamily often had the highest affinities and clearance rates. Moreover, sulfaphenazole, a CYP2C9 competitive inhibitor, inhibited disulfoton sulfoxidation by CYP2C9 (IC50 0.84 microM) as well as in HLMs. Ticlopidine, a CYP2C19 mechanism-based inhibitor, inhibited disulfoton sulfoxidation by CYP2C19 (IC50 after coincubation, 43.5 microM; IC50 after preincubation, 4.3 microM) and also in HLMs. Our results indicate that current models of the substrate binding site of the CYP2C subfamily would not effectively predict thioether pesticide metabolism. Thus, the substrate specificity of CYP2Cs is more extensive than is currently believed, and some reevaluation of structure-activity relationships may be required.     

体外“鸡尾酒法”研究5-羟基雷公藤内酯醇对人肝微粒体CYP450酶亚型的抑制

目的：评价（5R）-5-羟基雷公藤内酯醇（T8）在体外对人肝微粒体CYP450酶7种主要亚型CYP3A／5、CYP2D6、CYPlA2、CYP2C9、CYP2C19、CYP286和CYP2C8的直接抑制作用和时间依赖性抑制作用,为临床药物一药物相互作用研究提供指导。方法：本实验分别利用IC50和IC50偏移进行评价。结果：T8对上述7种亚型的直接抑制IC50都高于100μmol／L,时间依赖性抑制研究中没有出现IC50偏移。结论：T8对7种主要的CYP450酶亚型没有直接抑制和时间依赖性抑制作用。临床上发生由于T8抑制上述7种亚型的CYP450酶导致的药物一药物相互作用的可能性较小。     

Validation of (-)-N-3-benzyl-phenobarbital as a selective inhibitor of CYP2C19 in human liver microsomes.

(-)-N-3-Benzyl-phenobarbital (NBPB) was reported to be a potent and selective inhibitor of CYP2C19. To validate the selectivity of NBPB toward CYP2C19 in human liver microsomes, the inhibitory effects on major cytochrome P450 isoform-specific reactions were evaluated in the present study. In human liver microsomes, NBPB showed potent competitive inhibition on CYP2C19-mediated S-mephenytoin 4'-hydroxylation with an IC(50) value of 0.25 microM and K(i) value of 0.12 microM, whereas weak inhibition was observed for CYP1A2-, CYP2A6-, CYP2B6-, CYP2C8-, CYP2C9-, CYP2D6-, and CYP3A4-mediated reactions with IC(50) values >100, >100, 62, 34, 19, >100, and 89 microM, respectively. Importantly, its selectivity toward CYP2C19 among the CYP2C subfamily was demonstrated. Therefore, NBPB can be used as a potent and selective inhibitor to establish the relative contribution of CYP2C19 for in vitro reaction phenotyping studies. This compound can also serve as a positive control inhibitor of CYP2C19 for routine screening of P450 reversible inhibition when human liver microsomes are used as the enzyme source.     

评价HPPH对细胞色素P450酶体外代谢活性的影响

目的:评价HPPH在体外对大鼠及人肝微粒CYP450酶的6种亚型酶活性的影响,预测使用HPPH可能出现的药物相互作用。方法:将注射用HPPH与CYP450酶的6种亚型的特异性探针底物非那西汀(CYP1A2)、甲苯磺丁脲(CYP2C9)、S-美芬妥因(CYP2C19)、右美沙芬(CYP2D6)、氯唑沙宗(CYP2E1)、咪达唑仑(CYP3A4)和睾酮(CYP3A4)与大鼠及人肝微粒进行孵育反应,采用HPLC-MS/MS法测定对应的7种代谢产物(对乙酰氨基酚、羟基甲苯磺丁脲、4-羟基美芬妥因、O-去甲基右美沙芬、6-羟基氯唑沙宗、1′-羟基咪达唑仑、6β-羟基睾酮)的浓度。结果:在本实验条件下,HPPH浓度为1.00~50.00μmol·L-1时,未发现其对大鼠的CYP1A2、CYP2C9、CYP2D6、CYP2E1、CYP3A4产生抑制作用。在本实验条件下,HPPH浓度为0.50~10.00μmol·L-1时,未发现其对人CYP1A2产生抑制作用;但对人CYP2C9、CYP2C19、CYP2D6、CYP2E1均存在抑制作用;对人CYP3A4,对底物咪达唑仑存在抑制作用,对底物睾酮未发现抑制作用。结论:HPPH对CYP450酶的抑制作用存在种属差异,在人体内HPPH与CYP450酶作用有待体内实验进一步证明。