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The role of polymorphic cytochrome P450 gene(CYP2B6)in B-chronic lymphocytic leukemia(B-CLL)incidence and outcome among Egyptian patients
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作者 MENNA AL-ADL MAGDY MYOUSSEF +2 位作者 AHMED EL-SEBAIE SHERIF REFAAT AFAF EL-SAID 《Oncology Research》 SCIE 2024年第4期785-797,共13页
Cytochromes P450(CYPs)play a prominent role in catalyzing phase I xenobiotic biotransformation and account for about 75%of the total metabolism of commercially available drugs,including chemotherapeutics.The gene expr... Cytochromes P450(CYPs)play a prominent role in catalyzing phase I xenobiotic biotransformation and account for about 75%of the total metabolism of commercially available drugs,including chemotherapeutics.The gene expression and enzyme activity of CYPs are variable between individuals,which subsequently leads to different patterns of susceptibility to carcinogenesis by genotoxic xenobiotics,as well as differences in the efficacy and toxicity of clinically used drugs.This research aimed to examine the presence of the CYP2B6*9 polymorphism and its possible association with the incidence of B-CLL in Egyptian patients,as well as the clinical outcome after receiving cyclophosphamide chemotherapy.DNA was isolated from whole blood samples of 100 de novo B-CLL cases and also from 100 sex-and age-matched healthy individuals.The presence of the CYP2B6*9(G516T)polymorphism was examined by PCR-based allele specific amplification(ASA).Patients were further indicated for receiving chemotherapy,and then they were followed up.The CYP2B6*9 variant indicated a statistically significant higher risk of B-CLL under different genetic models,comprising allelic(T-allele vs.G-allele,OR=4.8,p<0.001)and dominant(GT+TT vs.GG,OR=5.4,p<0.001)models.Following cyclophosphamide chemotherapy,we found that the patients with variant genotypes(GT+TT)were less likely to achieve remission compared to those with the wild-type genotype(GG),with a response percentage of(37.5%vs.83%,respectively).In conclusion,our findings showed that the CYP2B6*9(G516T)polymorphism is associated with B-CLL susceptibility among Egyptian patients.This variant greatly affected the clinical outcome and can serve as a good therapeutic marker in predicting response to cyclophosphamide treatment. 展开更多
关键词 B-CLL Xenobiotics cytochromes p450 cyp2B6
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CYP27A1对肝细胞癌预后的影响及生物学作用
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作者 张昕彤 吴昊 +5 位作者 胡艳芬 张文桃 畅靖嘉 朱剑军 李莉 刘铭 《解放军医学杂志》 CAS CSCD 北大核心 2024年第4期387-395,共9页
目的分析细胞色素P450家族27亚家族A成员1(CYP27A1)对肝细胞癌(HCC)预后的影响及生物学作用,并初步探讨其影响HCC生长的分子机制。方法基于癌症基因数据库(TCGA)分析CYP27A1在HCC中的表达情况及其与HCC患者预后的关系;基于CYP27A1表达... 目的分析细胞色素P450家族27亚家族A成员1(CYP27A1)对肝细胞癌(HCC)预后的影响及生物学作用,并初步探讨其影响HCC生长的分子机制。方法基于癌症基因数据库(TCGA)分析CYP27A1在HCC中的表达情况及其与HCC患者预后的关系;基于CYP27A1表达量中位值,将样本分为CYP27A1高表达组(n=170)与CYP27A1低表达组(n=170),利用基因集富集分析(GSEA)分别对两组进行基因集富集分析;免疫荧光染色检测及数据库查找CYP27A1蛋白亚细胞定位;构建过表达CYP27A1质粒,转染HCC细胞MHCC-97H和HCCLM3,设置阴性对照组(转染空载质粒)与CYP27A1过表达组(转染过表达CYP27A1重组质粒)。采用CCK-8法、流式细胞仪、活性氧(ROS)荧光探针等检测过表达CYP27A1对HCC细胞活力、凋亡及ROS生成的影响;结合生物信息学分析CYP27A1与ROS生成相关基因及HCC增殖相关基因表达的相关性。结果与正常肝组织比较,HCC组织中CYP27A1 mRNA表达量明显降低(P<0.01)。CYP27A1表达与HCC患者性别、T分期、肿瘤分级和肿瘤分期有关(P<0.05)。CYP27A1低表达组总生存率明显低于高表达组(P<0.01)。GSEA富集分析结果显示,CYP27A1低表达组HCC“干性”亚类和“增殖”亚类基因集水平升高。在MHCC-97H和HCCLM3细胞中,CYP27A1主要定位于细胞核;在HepG2细胞中,CYP27A1主要定位于线粒体。与阴性对照组比较,过表达CYP27A1后,HCC细胞活力下降(P<0.01)、ROS水平降低(P<0.05),而细胞凋亡水平无明显改变(P>0.05)。CYP27A1与抑制ROS生成相关基因表达呈正相关(P<0.05),抑制ROS生成相关基因与HCC增殖相关基因表达呈负相关(P<0.05)。结论CYP27A1在HCC中呈低表达,下调CYP27A1可能通过促进ROS生成促进HCC恶性生长。 展开更多
关键词 肝细胞癌 细胞色素p450家族27亚家族A成员1 恶性生长
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长链非编码RNA CYP1B1-AS1对急性髓系白血病细胞增殖和迁移的影响及机制实验研究
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作者 姚云 廖冬 +2 位作者 周双雄 刘文俐 王荣 《陕西医学杂志》 CAS 2024年第6期723-728,共6页
目的:探讨长链非编码RNA(lncRNA)CYP1B1-AS1对急性髓系白血病细胞增殖和迁移的影响及机制。方法:实时荧光定量PCR(RT-qPCR)检测CYP1B1-AS1在急性髓系白血病细胞系THP-1、NB4、HL-60、KG-1、SKM-1和骨髓基质细胞HS-5中的表达量。通过5-氮... 目的:探讨长链非编码RNA(lncRNA)CYP1B1-AS1对急性髓系白血病细胞增殖和迁移的影响及机制。方法:实时荧光定量PCR(RT-qPCR)检测CYP1B1-AS1在急性髓系白血病细胞系THP-1、NB4、HL-60、KG-1、SKM-1和骨髓基质细胞HS-5中的表达量。通过5-氮杂-2’-脱氧胞苷(5-Aza-CdR)处理急性髓系白血病细胞系,RT-qPCR检测5-Aza-CdR对CYP1B1-AS1表达的影响。根据转染物不同分别将HL-60细胞分为NC组和CYP1B1-AS1组。克隆形成实验和划痕实验依次检测HL-60细胞的增殖和迁移能力。双荧光素酶实验验证CYP1B1-AS1与微小RNA(miR)-1306-5p的靶向关系。RT-qPCR检测CYP1B1-AS1对HL-60细胞miR-1306-5p表达的影响。免疫印迹法检测CYP1B1-AS1对HL-60细胞周期蛋白依赖性激酶2(CDK2)、细胞周期素E(Cyclin E)和转录因子(Twist)、纤维连接蛋白(Fibronectin)表达的影响。结果:与HS-5细胞比较,CYP1B1-AS1在急性髓系白血病细胞系中表达量降低,且HL-60细胞系中CYP1B1-AS1表达量最低(均P<0.05)。5-Aza-CdR能够明显促进急性髓系白血病细胞系中CYP1B1-AS1的表达(均P<0.05)。与NC组比较,CYP1B1-AS1组HL-60细胞增殖能力和迁移率降低(均P<0.05)。过表达miR-1306-5p能够抑制野生型CYP1B1-AS1的荧光素酶活性(P<0.05)。与NC组比较,CYP1B1-AS1组HL-60细胞中miR-1306-5p表达减少,细胞增殖和迁移相关蛋白CDK2、Cyclin E、Twist、Fibronectin表达降低(均P<0.05)。结论:过表达CYP1B1-AS1可能通过靶向下调miR-1306-5p表达抑制急性髓系白血病细胞的增殖和迁移。 展开更多
关键词 急性髓系白血病 长链非编码RNA cyp1B1-AS1 微小RNA-1306-5p 增殖 迁移 靶向关系
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Functionalized selenium nanoparticles ameliorated acetaminophen-induced hepatotoxicity through synergistically triggering PKCδ/Nrf2 signaling pathway and inhibiting CYP 2E1
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作者 Si Zou Yetao Gong +4 位作者 Xiujie Li Yanbin Wu Jinzhong Wu Jianguo Wu Ka-Hing Wong 《Food Science and Human Wellness》 SCIE CSCD 2024年第2期932-945,共14页
Selenium nanoparticles(SeNPs)have been demonstrated potential for use in diseases associated with oxidative stress.Functionalized SeNPs with lower toxicity and higher biocompatibility could bring better therapeutic ac... Selenium nanoparticles(SeNPs)have been demonstrated potential for use in diseases associated with oxidative stress.Functionalized SeNPs with lower toxicity and higher biocompatibility could bring better therapeutic activity and clinical application value.Herein,this work was conducted to investigate the protective effect of Pleurotus tuber-regium polysaccharide-protein complex funtionnalized SeNPs(PTR-SeNPs)against acetaminophen(APAP)-induced oxidative injure in HepG2 cells and C57BL/6J mouse liver.Further elucidation of the underlying molecular mechanism,in particular their modulation of Nrf2 signaling pathway was also performed.The results showed that PTR-SeNPs could significantly ameliorate APAP-induced oxidative injury as evidenced by a range of biochemical analysis,histopathological examination and immunoblotting study.PTR-SeNPs could hosphorylate and activate PKCδ,depress Keap1,and increase nuclear accumulation of Nrf2,resulting in upregulation of GCLC,GCLM,HO-1 and NQO-1 expression.Besides,PTR-SeNPs suppressed the biotransformation of APAP to generate intracellular ROS through CYP 2E1 inhibition,restoring the mitochondrial morphology.Furthermore,the protective effect of PTR-SeNPs against APAP induced hepatotoxicity was weakened as Nrf2 was depleted in vivo,indicating the pivotal role of Nrf2 signaling pathway in PTR-SeNPs mediated hepatoprotective efficacy.Being a potential hepatic protectant,PTR-SeNPs could serve as a new source of selenium supplement for health-promoting and biomedical applications. 展开更多
关键词 pTR-SeNps(polysaccharide-proteincomplex functionalized selenium nanoparticles) Acetaminophen-induced hepatotoxicity Nuclear factor erythroid 2-related factor 2 cytochrome p450 enzyme 2E1 Mitochondria
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Cytochrome P450 2E1 genetic polymorphism and gastric cancer in Changle,Fujian Province 被引量:25
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作者 Lin Cai~1 Shun-Zhang Yu~2 Zuo-Feng Zhang~3 1 Department of Epidemiology,Fujian Medical University,Fuzhou 350004,Fujian Province,China2 Department of Epidemiology,Shanghai Medical University,Shanghai 200032,China3 Department of Epidemiology,UCLA School of Public Health,Los Angeles California,USA 《World Journal of Gastroenterology》 SCIE CAS CSCD 2001年第6期792-795,共4页
AIM: Genetic polymorphism in enzymes of carcinogen metabolism has been found to have the influence on the susceptibility to cancer. Cytochrome P450 2E1 ( CYP2 E1) is considered to play an important role in the metabol... AIM: Genetic polymorphism in enzymes of carcinogen metabolism has been found to have the influence on the susceptibility to cancer. Cytochrome P450 2E1 ( CYP2 E1) is considered to play an important role in the metabolic activation of procarcinogens such as N-nitroscoamines and Iow molecular weight organic compounds. The purpose of this study is to determine whether CYP450 2Elpolymorphisms are associated with risk s of gastric cancer.METHODS: We conducted a population based case-control study in Changle county, Fujian Province, a high-risk region of gastric cancer in China. Ninety-one incident gastric cancer patients and ninety-four healthy controls were included in our study. Datas including dsmographic characteristcs, diet intake, and alcohol and tobacco consumption of indivduals in our study were completed by a standardized questionnaire. PCR-RFLP revealed three genotypes: heterozygote (C1/C2) and two homozygotes (C1/C1 and C2/C2) in CYP2E1.RESULTS: The frequency of variant genotypes (C1/C2 and C2/C2) in gastric cancer cases and controls was 36.3% and 24.5%, respectively. The rare homozygous C2/C2 genotype was found in 6 indivduals in gastric cancer group(6.6%),whereas there was only one in the control group (1.1%).However, there was no statistically significan difference between the two groups (two-tailed Fisher′s exact test, P =0.066). Indivduals in gastric cancer group were more likely to carry genotype C1/C2 (odds ratio, OR = 1.50) and C2/C2(OR = 7.34) than indivduals in control group (X2 = 4.597, for trend P=0.032). The frequencies of genofypes with the C2allele ( C1/C2 and C2/C2 genotypes) were compared with those of genotypes without C2 allele ( C1/C1 genotype )among indivduals in gastric cancer group and control group according to the pattern of gastric cancer risk factors. The results show that indivduals who exposed to these gastric cancer risk factors and carry the C2 allele seemed to have a higher risk of developing gastric cancer.CONCLUSION: Polymorphism of CYP2E1 gene may have some effct in the development of gastric cancer in Changle county, Fujian Province. 展开更多
关键词 GASTRIC neoplasm/genetics GASTRIC neoplasm/ etiology cytochrome p-450 2E1 cyp2E1/genetics genotype human FUJIAN
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Hepatoprotective effects of S-adenosyl-L-methionine against alcohol-and cytochrome P450 2E1-induced liver injury 被引量:24
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作者 Arthur I Cederbaum 《World Journal of Gastroenterology》 SCIE CAS CSCD 2010年第11期1366-1376,共11页
S-adenosyl-L-methionine (SAM) acts as a methyl donor for methylation reactions and participates in the synthesis of glutathione. SAM is also a key metabolite that regulates hepatocyte growth, differentiation and death... S-adenosyl-L-methionine (SAM) acts as a methyl donor for methylation reactions and participates in the synthesis of glutathione. SAM is also a key metabolite that regulates hepatocyte growth, differentiation and death. Hepatic SAM levels are decreased in animal models of alcohol liver injury and in patients with alcohol liver disease or viral cirrhosis. This review describes the protection by SAM against alcohol and cytochrome P450 2E1-dependent cytotoxicity both in vitro and in vivo and evaluates mechanisms for this protection. 展开更多
关键词 cytochrome p450 2E1 S-ADENOSYL-L-METHIONINE ETHANOL Toxic hepatitis Oxidative stress
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果蝇CYP6G1真核表达及其对新烟碱类杀虫剂的体外代谢 被引量:1
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作者 邵晨 施雨 +3 位作者 朱语彤 程家高 李忠 须志平 《昆虫学报》 CAS CSCD 北大核心 2023年第2期190-199,共10页
【目的】CYP6G1是黑腹果蝇Drosophila melanogaster体内重要的P450酶,其底物谱广泛,除了介导黑腹果蝇对DDT的抗性之外,还与其对新烟碱类和氨基甲酸酯类杀虫剂的抗性密切相关,但目前CYP6G1的代谢功能与黑腹果蝇抗药性之间的因果关系还缺... 【目的】CYP6G1是黑腹果蝇Drosophila melanogaster体内重要的P450酶,其底物谱广泛,除了介导黑腹果蝇对DDT的抗性之外,还与其对新烟碱类和氨基甲酸酯类杀虫剂的抗性密切相关,但目前CYP6G1的代谢功能与黑腹果蝇抗药性之间的因果关系还缺乏一些直接证据。【方法】本研究通过建立Bac-to-Bac昆虫杆状病毒真核表达系统,功能性地表达了果蝇细胞色素P450酶CYP6G1,以吡虫啉为阳性对照,利用超高效液相色谱(ultra-performance liquid chromatography,UPLC)和超高效液相色谱串联质谱(ultra-performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)分析CYP6G1对噻虫啉和噻虫嗪的体外代谢情况。【结果】孵育2 h后,重组CYP6G1能够羟基化吡虫啉和噻虫啉,使它们的含量分别减少17.6%±7.1%和4.2%±2.3%;重组CYP6G1可以促进噻虫嗪转化为噻虫胺,使噻虫嗪含量减少5.8%±2.1%。【结论】本研究结果为果蝇CYP6G1的结构功能研究提供一定理论依据。 展开更多
关键词 黑腹果蝇 细胞色素p450 cyp6G1 Bac-to-Bac昆虫杆状病毒表达系统 功能研究 杀虫剂 体外代谢
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Relationship between genetic polymorphism of cytochrome P450IIE1 and fatty liver 被引量:12
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作者 Yun-Feng Piao Jing-Tao Li Yang Shi, Department of Gastroenterology, First Hospital, Jilin University, Changchun 130021, Jilin Province, China 《World Journal of Gastroenterology》 SCIE CAS CSCD 2003年第11期2612-2615,共4页
AIM: To study the correlation between genetic polymorphism of cytochrome P450IIE1 (CYPIIE1) and fatty liver.METHODS: Peripheral blood mononuclear cells were collected in 56 patients with fatty liver, 26 patients witho... AIM: To study the correlation between genetic polymorphism of cytochrome P450IIE1 (CYPIIE1) and fatty liver.METHODS: Peripheral blood mononuclear cells were collected in 56 patients with fatty liver, 26 patients without fatty liver and 20 normal controls. Then PCR-RFLP was used to analyze genetic polymorphism of CYPIIE1 in monocytes on the region of Pst I and Rsa I.RESULTS: The frequency of homozygotic C1 gene in patients with alcoholic fatty liver (28.6 %), obese fatty liver (38.5 %), or diabetic fatty liver (33.3 %) was significantly lower than that of the corresponding patients without fatty liver (100 %, 100 % and 80 % respectively), while the frequency of C2 genes, including C1/C2 and C2/C2, was significantly higher (71.4 %/0 %, 61.5 %/0 %, and 66.7 %/20 %) (P<0.01). The frequency distribution of the above genes of non-fatty liver patients (100 %/0, 100 %/0, and 80 %/20 %) was not significantly different from that of the normal controls (85 %/15 %) (P>0.05).CONCLUSION: The genetic polymorphism of CYPIIE1 on the position of Pst I and Rsa I is related to the susceptibility of fatty liver. Besides, C2 gene may play a key role in the pathogenesis of fatty liver. 展开更多
关键词 脂肪肝 细胞色素p450IIE1 遗传多态性 发病机制
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Cytochrome p450 2E1 polymorphisms and the risk of gastric cardia cancer 被引量:8
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作者 LinCai Zong-LiZheng Zuo-FengZhang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第12期1867-1871,共5页
AIM: Genetic polymorphisms of drug-metabolizing enzymes have recently been shown to affect susceptibility to chemical carcinogenesis. Cytochrome P450 2E1 (CYP2E1)enzyme catalyzes the metabolism of many procarcinogens,... AIM: Genetic polymorphisms of drug-metabolizing enzymes have recently been shown to affect susceptibility to chemical carcinogenesis. Cytochrome P450 2E1 (CYP2E1)enzyme catalyzes the metabolism of many procarcinogens,such as N-nitrosamines and related compounds. The gene coding for this enzyme is polymorphic and thus may play a role in gastric cardia cancer (GCC) etiology. In this hospital-based case-control study, we evaluate the relationship between genetic polymorphisms of CYP2E1and the risk of GCC.METHODS: The study subjects comprised 159 histologically confirmed GCC cases identified via hospital cancer registry and surgical records at five hospitals in Fuzhou, Fujian Province, China, between April and November 2001.Controls were 192 patients admitted to the same hospitals for nonmalignant conditions. The genotypes of CYP2E1were detected by a PCR-based RFLP assay. The odds ratios were estimated by logistic regression analyses and were adjusted for potential confounding factors.RESULTS: The distribution of three genotypes of CYP2E1in GCC cases and controls was significantly different (X2 = 16.04, P<0.01). The frequency of the CYP2E1 (c1/c1)genotype in GCC cases and controls was 60.4% and 40.1%,respectively. The CYP2E1 (c1/c1) genotype was associated with an increased risk for GCC (the adjusted (OR) was 2.37, 95% confidence interval (CI): 1.52-3.70). Subjects who carried the CYP2E 1 (c1/c1) genotype and were habitual smokers were at a significantly higher risk of developing GCC (OR = 4.68, 95%CI: 2.19-10.04) compared with those who had the CYP2E1 (c1/c2or c2/c2') genotype and did not smoke.CONCLUSION: These results suggest that the CYP2E 1genotype may influence individual susceptibility to development of GCC, and that the risk increases significantly in smokers. 展开更多
关键词 细胞色素p450 2E1 基因多态性 胃贲门癌
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Cytochrome P450 2E1 RsaI/PstI and DraI Polymorphisms Are Risk Factors for Lung Cancer in Mongolian and Han Population in Inner Mongolia 被引量:3
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作者 Xiu-lan Su Ba Bin +1 位作者 Hong-wei Cui Mei-rong Ran 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2011年第2期107-111,共5页
Objective: To explore the relationship between cytochrome P450 2E1 (CYP2E1) RsaI/PstI and DraI polymorphism and lung cancer susceptibility in Mongolian and Han population in Inner Mongolia of China. Methods: CYP2E... Objective: To explore the relationship between cytochrome P450 2E1 (CYP2E1) RsaI/PstI and DraI polymorphism and lung cancer susceptibility in Mongolian and Han population in Inner Mongolia of China. Methods: CYP2E1 RsaI/PstI and DraI polymorphisms were detected by polymerase chain reaction-restriction fragment length polymorphism in 64 lung cancer patients, 150 healthy Mongolian and 150 healthy Han individuals. The distribution of genotype and allele frequencies of CYP2E1 RsaI/PstI and DraI polymorphisms were studied. Results: The risk of lung cancer was increased in individuals with CYP2E1 (cl/cl) and CYP2E1 (DD) with OR values of 2.431 (95%CI=1.082-5.460) and 2.778 (95%CI=1.358-5.683) respectively (P0.05). When CYP2E1 RsaI/PstI and DraI polymorphisms were combined, the risk of lung cancer was reduced in individuals with CYP2E1 (cl/c2+c2/c2 and DD+CC) with OR values of 0.233 (95%CI=0.088-0.615, P0.05). In smokers, the susceptibility to lung cancer was higher in the individuals with CYP2E1 (c1/c1) and CYP2E1 (DD) than in the individuals with c2 and C allele (P0.05, OR=2.643 and 4.308 respectively). There was no significant difference in distribution of CYP2E1 genotype frequency between healthy Mongolian, Han population and lung cancer patients, healthy controls in Inner Mongolia. Conclusion: CYP2E1 (c1/c1) and CYP2E1 (DD) are predisposing factors of lung cancer in population in Inner Mongolia. CYP2E1 (c2﹢C) co-mutation may decrease the risk of lung cancer. Smoking exerts synergetic effect with CYP2E1 (c1/c1) and CYP2E1 (DD) on the occurrence of lung cancer. 展开更多
关键词 cytochrome p450 2E1 Gene polymorphism Lung cancer Susceptivity
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黄酮类化合物对细胞色素P450 CYP1A2的抑制作用及其构效关系研究 被引量:20
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作者 李建康 和凡 +4 位作者 毕惠嫦 左中 刘柏东 罗海彬 黄民 《药学学报》 CAS CSCD 北大核心 2008年第12期1198-1204,共7页
利用本实验室已建立的体外肝微粒体模型,测定36个黄酮类单体化合物对人细胞色素P450 CYP1A2的抑制活性,并使用三维定量构效关系方法研究化合物的分子结构参数与其抑制活性之间的关系。CoMSIA模型证实黄酮类化合物的结构参数与其CYP1A2... 利用本实验室已建立的体外肝微粒体模型,测定36个黄酮类单体化合物对人细胞色素P450 CYP1A2的抑制活性,并使用三维定量构效关系方法研究化合物的分子结构参数与其抑制活性之间的关系。CoMSIA模型证实黄酮类化合物的结构参数与其CYP1A2抑制活性存在明显的相关性(模型的相关系数R2为0.948),且有良好的预测能力(交叉验证相关系数q2为0.630),同时使用"留五法"证实模型的稳定性和可靠性。结果表明,相对于黄酮,α-萘黄酮的π-π共轭体系更有利于提高化合物的抑制活性。根据获得的模型的三维等势图,在α-萘黄酮基础上,6、3′、4′位引入带正电基团或是疏水基团,同时5位引入带负电基团,能有效改善化合物的CYP1A2抑制活性。 展开更多
关键词 细胞色素p450 cyp1a2 抑制活性 黄酮类化合物 定量构效关系 药物设计
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酒精性肝损伤大鼠细胞色素P450 CYP2E1和细胞色素P450 CYP3A的代谢活性 被引量:10
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作者 康晓琳 薛永志 +1 位作者 武润生 刘和莉 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2010年第4期286-290,共5页
目的观察酒精性肝损伤对大鼠细胞色素P450CYP3A(CYP3A)和细胞色素P450CYP2E1(CYP2E1)代谢活性的影响。方法采用ig给予白酒制备大鼠酒精性肝损伤模型,检测血清中谷丙转氨酶(GPT)和谷草转氨酶(GOT)活性,采用HE染色法光镜下观测酒精对肝脏... 目的观察酒精性肝损伤对大鼠细胞色素P450CYP3A(CYP3A)和细胞色素P450CYP2E1(CYP2E1)代谢活性的影响。方法采用ig给予白酒制备大鼠酒精性肝损伤模型,检测血清中谷丙转氨酶(GPT)和谷草转氨酶(GOT)活性,采用HE染色法光镜下观测酒精对肝脏损伤程度。大鼠ip给予CYP3A探针药物咪达唑仑10mg·kg-1或ig给予CYP2E1探针药物氯唑沙宗50mg·kg-1后,采用高效液相色谱法测定不同时间点大鼠血浆中咪达唑仑和氯唑沙宗的血药浓度,并应用3P87软件计算其药代动力学参数,以考察CYP2E1和CYP3A的代谢活性的变化。大鼠ig给予氯唑沙宗80mg·kg-1后,热板方法测定大鼠添足次数和添足反射潜伏期。结果酒精性肝损伤可致大鼠肝小叶结构不清,肝索排列紊乱,肝细胞体积增大,呈弥漫性中度水变性,肝窦受压,大部分肝细胞胞浆内见大小不等的脂肪空泡;与正常对照组相比,酒精性肝损伤组大鼠GPT和GOT活性分别增加了16.0%和20.0%(P<0.05,P<0.01)。酒精性肝损伤致大鼠CYP2E1对探针药物氯唑沙宗的代谢活性增强,AUC,t1/2和cmax分别降低了38.0%,30.5%和35.0%(P<0.05);酒精肝损伤组大鼠氯唑沙宗镇痛效果明显降低;酒精性肝损伤致大鼠CYP3A对探针药物咪达唑仑的代谢活性增强,AUC,t1/2和cmax分别降低了122.6%,54.9%和56.9%(P<0.01,P<0.05)。结论酒精性肝损伤可使大鼠CYP2E1和CYP3A代谢活性增强。 展开更多
关键词 酒精性肝疾病 细胞色素p450 cyp2E1 细胞色素p450 cyp3A
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合成冰片对大鼠肝CYP450酶含量及CYP3A1 mRNA表达的影响 被引量:12
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作者 胡利民 姜民 +2 位作者 王少峡 高秀梅 张伯礼 《天津中医药》 CAS 2005年第4期284-286,共3页
[目的]研究冰片对大鼠肝脏细胞色素氧化酶(cytochrom e P450,CYP450)含量及其亚型CYP3A1m RNA表达的影响。[方法W]istar大鼠合成冰片(设0.3gk/g和0.03gk/g剂量组,1次d/,连续7d)灌胃,以溶媒羧甲基纤维素纳(CM C-Na)和苯巴比妥钠为对照组... [目的]研究冰片对大鼠肝脏细胞色素氧化酶(cytochrom e P450,CYP450)含量及其亚型CYP3A1m RNA表达的影响。[方法W]istar大鼠合成冰片(设0.3gk/g和0.03gk/g剂量组,1次d/,连续7d)灌胃,以溶媒羧甲基纤维素纳(CM C-Na)和苯巴比妥钠为对照组,钙沉积法提取肝微粒体,紫外分光光度法测定CYP450含量,实时定量RT-PCR法检测肝脏CYP3A1m RNA的表达。[结果]0.3gk/g合成冰片口服可诱导大鼠肝脏CYP450酶含量增高(P<0.05),CYP3A1m RNA表达上调(P<0.05)。[结论]高剂量合成冰片口服可能影响肝脏药物代谢。 展开更多
关键词 合成冰片 肝脏cyp450 cyp3a1 药物代谢
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Cytochrome P450 family 17 subfamily A member 1 mutation causes severe pseudohermaphroditism: A case report 被引量:1
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作者 Yu Gong Fang Qin +3 位作者 Wen-Jia Li Le-Yu Li Ping He Xing-Jian Zhou 《World Journal of Clinical Cases》 SCIE 2022年第11期3553-3560,共8页
BACKGROUND 17α-Hydroxylase deficiency(17-OHD)is a rare form of congenital adrenal hyperplasia,characterized by hypertension,hypokalemia,and gonadal dysplasia.However,due to the lack of a comprehensive understanding o... BACKGROUND 17α-Hydroxylase deficiency(17-OHD)is a rare form of congenital adrenal hyperplasia,characterized by hypertension,hypokalemia,and gonadal dysplasia.However,due to the lack of a comprehensive understanding of this disease,it is prone to misdiagnosis and missed diagnosis,and there is no complete cure.CASE SUMMARY We report a female patient with 17-OHD.The patient was admitted to the Department of Neurology of our hospital due to limb weakness.During treatment,it was found that the patient’s condition was difficult to correct except for hypokalemia,and her blood pressure was difficult to control with various antihypertensive drugs.She was then transferred to our department for further treatment.On physical examination,the patient's gonadal development was found to be abnormal,and chromosome analysis demonstrated karyotype 46,XY.Considering the possibility of 17-OHD,the cytochrome P450 family 17 subfamily A member 1(CYP17A1)test was performed to confirm the diagnosis.CONCLUSION The clinical manifestations of 17-OHD are complex.Hormone determination,imaging examination,chromosome determination and CYP17A1 gene test are helpful for early diagnosis. 展开更多
关键词 Congenital adrenal cortex hyperplasia cytochrome p450 family 17 subfamily A member 1 17α-Hydroxylase deficiency pseudohermaphroditism Case report
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细胞色素P450新家族的第一个基因CYP337A1的分子克隆与序列分析 被引量:6
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作者 艾均文 董元凌 +5 位作者 孔卫青 杨金宏 张学松 柳照应 张永亮 朱勇 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第2期51-58,共8页
依据家蚕基因组数据,通过BLASTP比对,选择了主要与抗性相关的CYP3集团(clan)中具有完全编码框并含有P450基因特征结构域的1条序列为研究对象,用RT-PCR方法对其进行了克隆.结果表明,该基因ORF为1 467 bp,编码489个氨基酸,推定的蛋白质分... 依据家蚕基因组数据,通过BLASTP比对,选择了主要与抗性相关的CYP3集团(clan)中具有完全编码框并含有P450基因特征结构域的1条序列为研究对象,用RT-PCR方法对其进行了克隆.结果表明,该基因ORF为1 467 bp,编码489个氨基酸,推定的蛋白质分子质量为56.60 KDa,等电点为8.64.只有1个内含子,外显子/内含子边界处符合GT-AG规则.与美国棉铃虫的CYP321A、邪恶按蚊的CYP6P9的相似性(identity)相对较高,分别为34%、32%,低于同一家族成员氨基酸相似性应高于40%的规定,从而被细胞色素P450委员会命名为新家族的第一个基因CYP337A1(GenBank登陆号:EF415297). 展开更多
关键词 细胞色素p450 cyp337a1 基因克隆 序列分析 家蚕
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注射用丹参总酚酸(冻干)对人CYP450酶和P-糖蛋白体外抑制作用及对大鼠CYP1A2和CYP3A体内诱导作用(英文) 被引量:6
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作者 胡冰 段超慧 +4 位作者 岳洁浩 马英丽 周大铮 李德坤 叶正良 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2013年第1期6-12,共7页
目的探讨注射用丹参总酚酸(冻干)(SLI)对人CYP450酶和P-糖蛋白体外抑制作用以及对大鼠CYP1A2和CYP3A体内诱导作用。方法①应用P450-GloTMCYP450检测试剂盒,通过化学发光法测定SLI和经典抑制剂对细胞色素P4501A2(CYP1A2),CYP2D6,CYP3A4,C... 目的探讨注射用丹参总酚酸(冻干)(SLI)对人CYP450酶和P-糖蛋白体外抑制作用以及对大鼠CYP1A2和CYP3A体内诱导作用。方法①应用P450-GloTMCYP450检测试剂盒,通过化学发光法测定SLI和经典抑制剂对细胞色素P4501A2(CYP1A2),CYP2D6,CYP3A4,CYP2C19和CYP2C9的IC50值,通过比较SLI和经典抑制剂对相应细胞色素P450亚型的IC50值来判断SLI对人CYP450酶的体外抑制作用。②Wistar大鼠分别iv给予SLI 3,10和30 mg·kg-1和诱导剂苯巴比妥钠20 mg·kg-1,采用探针底物法,通过比较代谢产物的生成速率来评价SLI对大鼠CYP1A2和CYP3A的诱导作用。③应用ATP酶检测试剂盒,通过化学发光法测定ATP酶活性来评价SLI是否为P-gp的底物或抑制剂。结果①CYP1A2,CYP2C9,CYP2C19,CYP2D6和CYP3A4抑制剂的IC50与SLI对其的IC50进行比较(CYP1A2:0.12μmol·L-1vs 840μmol·L-1;CYP2C9:3.362μmol·L-1vs 704μmol·L-1;CYP2C19:3.236μmol·L-1vs 306μmol·L-1;CYP2D6:0.117μmol·L-1vs 2660μmol·L-1;CYP3A4:0.078μmol·L-1vs 1780μmol·L-1)。②与空白对照组(86.4±6.3)nmol·g-1.min-1相比,SLI 3,10和30 mg·kg-1组CYP1A2活性分别为83.4±6.6,82.5±4.0和(83.4±6.6)nmol·g-1.min-1。与空白对照组(16.1±0.9)nmol·g-1.min-1比较,SLI 3,10和30 mg·kg-1组CYP3A活性分别为15.7±0.6,15.9±0.7和(15.9±1.0)nmol·g-1.min-1,无显著性差异。③以临床血药浓度为依据设计的一系列浓度的SLI 0.0002,0.0006,0.002,0.006,0.017,0.052,0.156和0.468 g.L-1的ATP酶活性分别与空白对照组进行比较(5.8,5.3,5.8,5.5,5.8,5.2,,5.8,5.3,vs 5.75μmol·g-1.min-1),无显著性差异。结论SLI临床给药剂量既不能体外抑制人CYP1A2,CYP2D6,CYP3A4,CYP2C19和CYP2C9酶活性,也不能诱导大鼠CYP1A2和CYP3A,同时也不是P-gp的体外抑制剂或底物。 展开更多
关键词 注射用丹参总酚酸(冻干) p-糖蛋白 细胞色素p450 cyp1a2 细胞色素p450cyp3A
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家蚕P450基因CYP305B1的基因组序列克隆及结构分析 被引量:4
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作者 卫正国 陈玉华 +2 位作者 李兵 王东 沈卫德 《蚕业科学》 CAS CSCD 北大核心 2009年第1期144-147,共4页
为了研究家蚕P450基因CYP305B1的结构,采用反向PCR技术克隆了家蚕CYP305B1基因的基因组序列,经序列测定,拼接得到家蚕CYP305B1全基因序列,发现家蚕CYP305B1的第1内含子位于5′端非翻译区序列(5′-UTR)中间。将家蚕CYP305B1与野桑蚕P450... 为了研究家蚕P450基因CYP305B1的结构,采用反向PCR技术克隆了家蚕CYP305B1基因的基因组序列,经序列测定,拼接得到家蚕CYP305B1全基因序列,发现家蚕CYP305B1的第1内含子位于5′端非翻译区序列(5′-UTR)中间。将家蚕CYP305B1与野桑蚕P450基因CYP305B1V1序列进行同源性比较的结果表明,二者在5′-UTR上游-400~-770 bp序列间的同源性只有40.4%,序列差异最大的是第1内含子和第6内含子。在第1内含子中,野桑蚕CYP305B1V1在翻译起始密码ATG上游-340之前存在330 bp的插入序列,在-110~-340 bp间二者的同源性也只有46.9%;在第6内含子中,家蚕CYP305B1比野桑蚕CYP305B1V1多了一段约300 bp的插入序列。研究结果有助于进一步探究该基因的转录和调控机制。 展开更多
关键词 家蚕 p450基因 cyp305B1 基因结构
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细胞色素P450 CYP2E1酶构型特征及其表达调控机制的研究进展 被引量:26
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作者 刘晨晖 乐江 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2010年第2期155-160,共6页
细胞色素P450CYP2E1酶参与代谢活化及失活多种前毒物、前致癌物和少数药物。在细胞色素P450超家族中,CYP2E1具有易介导自由基生成引发氧化应激反应的特征。CYP2E1表达水平可能是机体对环境和工业毒物或致癌物敏感程度的重要因素。研究表... 细胞色素P450CYP2E1酶参与代谢活化及失活多种前毒物、前致癌物和少数药物。在细胞色素P450超家族中,CYP2E1具有易介导自由基生成引发氧化应激反应的特征。CYP2E1表达水平可能是机体对环境和工业毒物或致癌物敏感程度的重要因素。研究表明,CYP2E1可被多种内、外源性物质所调控,并且CYP2E1的药理和毒理学功能与其以蛋白构型为基础的代谢行为密切相关。本文综述了CYP2E1基因多态性、酶构型特征与其代谢活性间的关系,并分析了其区别于其他细胞色素P450亚型的表达调控机制。 展开更多
关键词 细胞色素p450 cyp2E1 蛋白质结构 二级 基因表达调控 自由基
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P450arom、CYP19及TGF-β1在雄性肾阳虚不育大鼠睾丸中的表达 被引量:4
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作者 李蕊 刘曼丽 +4 位作者 田心 谢娟 周大伟 李臻 马静 《天津中医药》 CAS 2010年第3期236-239,共4页
[目的]观察限速酶芳香化酶(P450arom)、芳香化酶基因(CYP19)和转化生长因子(TGF-β1)在腺嘌呤诱导的雄性肾阳虚不育大鼠睾丸中的表达,探讨肾虚引起的雄性不育的病理机制。[方法]20只雄性大鼠随机分为4组:正常对照组,模型Ⅰ、Ⅱ、Ⅲ组,5... [目的]观察限速酶芳香化酶(P450arom)、芳香化酶基因(CYP19)和转化生长因子(TGF-β1)在腺嘌呤诱导的雄性肾阳虚不育大鼠睾丸中的表达,探讨肾虚引起的雄性不育的病理机制。[方法]20只雄性大鼠随机分为4组:正常对照组,模型Ⅰ、Ⅱ、Ⅲ组,5只/组。用腺嘌呤100、150、200mg(/kg·d),分别给模型Ⅰ,Ⅱ,Ⅲ组大鼠灌胃30d,诱导肾阳虚不育模型。用免疫组化浓缩型免疫组化染色法(SABC法),测定P450arom、CYP19和TGF-β1在实验大鼠睾丸中的表达。[结果]CYP19在大鼠睾丸的间质细胞、长形精子细胞中均有表达;P450arom和TGF-β1在睾丸的间质细胞有表达;其免疫阳性物质均位于细胞质内。模型组大鼠睾丸中TGF-β1的表达明显高于正常对照组(P<0.05),而CYP19、P450arom的表达明显低于正常对照组(P<0.05);各模型组之间,TGF-β1、CYP19、P450arom的表达无显著性差异(P>0.05)。[结论]P450arom、CYP19及TGF-β1在睾丸表达的异常可能与肾虚引起的雄性大鼠不育有关。 展开更多
关键词 肾阳虚 睾丸 大鼠 p450AROM cyp19 TGF-Β1
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3Gyγ射线照射和丝裂霉素C对大鼠肝脏细胞色素P450含量及其同工酶CYP2B1、CYP2E1活性的影响 被引量:3
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作者 严敏芬 郝福荣 +4 位作者 许立明 童顺高 季华钧 沈芝芬 金一尊 《辐射研究与辐射工艺学报》 EI CAS CSCD 北大核心 2005年第4期246-250,共5页
为研究3Gyγ射线全身照射和丝裂霉素C(MitomycinC,MMC)对雄性(Sprague-Dawley,SD)大鼠肝脏细胞色素P450含量、CYP2B1、CYP2E1活性的影响,分别给大鼠腹腔注射1mg/kgd的MMC(分1d,连续3d及6d用药三组),3mg/kg的MMC1d,3Gyγ射线全身照射,3G... 为研究3Gyγ射线全身照射和丝裂霉素C(MitomycinC,MMC)对雄性(Sprague-Dawley,SD)大鼠肝脏细胞色素P450含量、CYP2B1、CYP2E1活性的影响,分别给大鼠腹腔注射1mg/kgd的MMC(分1d,连续3d及6d用药三组),3mg/kg的MMC1d,3Gyγ射线全身照射,3Gyγ射线全身照射加1d3mg/kgMMC,另设空白对照和溶剂对照。各组处理结束后24h,处死大鼠取肝脏,制备微粒体,测P450含量、CYP2B1、CYP2E1活性。实验结果表明,给MMC1mg/kgd,1d后P450含量、CYP2B1活性变化无统计学差异(p>0.05),CYP2E1活性明显上升(p<0.01);连续3d或6d后,P450含量、CYP2B1、CYP2E1活性均无明显变化(p>0.05)。给3mg/kg的MMC1d,对P450含量、CYP2B1活性影响无统计学差异(p>0.05),CYP2E1活性上升明显(p<0.01);3Gyγ射线全身照射后,P450含量、CYP2B1活性无明显变化(p>0.05),CYP2E1活性下降(p<0.05);分析发现,3mg/kgMMC与3Gyγ射线之间没有交互作用。结果提示,γ射线可以抑制雄性SD大鼠肝脏CYP2E1活性,MMC对CYP2E1活性有诱导作用,但多次刺激使其耐受,P450含量、CYP2B1活性对γ射线、MMC不敏感。 展开更多
关键词 γ照射 丝裂霉素C p450 cyp2B1 cyp2E1
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