毕业论文 | 免费论文 | witkeycity.com免费论文网
用心做到最好,您的支持是我们最大的动力!
网站地图
合作联系
收藏本站

首 页 经济学论文 财政税收 证券金融 管理学论文 会计审计 工商管理 财务管理 公共管理 法学论文 理学论文 医药学论文
政治论文 社会学论文 文学论文 教育类论文 工学论文 计算机论文 艺术类论文 哲学论文 文化论文 英语论文 应用文 论文写作指导

   
 ·推荐文章
·毕业论文写作的基本要求
·计算机软件许可证协议书
·高三班主任工作总结
·入党思想汇报 1
·如何把简历设计成你的个人广告 
·简历策划:让面试官对你一见钟情
·企业管理软件的“渐进式实施方法
·中小企业人力资源规划困惑与解决
·电子商务对国际贸易的影响与中国
 ·书籍推荐
 ·广告推荐
   当前位置:首页 > 医药学论文 > 药学论文 > 正文
P-糖蛋白与药物的体内过程
来源:  [ 2006-9-7 13:03:36 ]  作者:   编辑:
收藏到VIVI | 收藏到365KEY | 收藏到YOUNOTE | 收藏到博采| 收藏到天极网摘 | 收藏到和讯网摘

    
    在小鼠肾模型中,P-gp介导的肾近曲小管地高辛的分泌会被异搏定和奎尼丁抑制[23,24]。地高辛与奎尼丁合用时,地高辛的机体总清除率从(318.0±19.3)ml/h 降至(167.1±11.0)ml/h,肠清除率从(28.8±1.7)ml/h 降至(11.1±1.6)ml/h[25]。临床上异搏定和奎尼丁导致地高辛血浓度和毒性的增加,也许正是通过抑制P-gp而发生的。
   
    综上所述,P-gp在内源、外源性底物的吸收、分布、代谢、排泄方面起着重要的作用;而P-gp对于药物体内过程、疾病治疗及临床疗效影响的确切机制是特殊的,也是复杂的。
   
    4  小结与展望
   
    1976年Juliano和 Ling第一次证实P-gp在多药耐药性肿瘤细胞中过度表达[26],现在人们已在多个领域对P-gp进行了研究,并在药物代谢、抗肿瘤、寄生虫及真菌治疗中的多药耐药性研究方面取得了一些进展;这些研究或许能够为将来彻底消除癌症治疗中的耐药性问题,解决好寄生虫与真菌的治疗问题奠定一些理论基础。但是,我们也应当看到目前还有许多问题亟待解决与证实。如P-gp对HIV感染者药物治疗的影响,对器官移植病人术后抗免疫排斥反应用药的影响以及P-gp与非口服、静脉途径吸收(经皮吸收)药物的作用机制等还不十分明确。因此,P-gp对药物体内过程影响的确切机制仍有待今后进一步研究完善。
   
                         【参考文献】
   
    1  Gottesman MM, Pastan I. Biochemistry of multidrug resistance mediated by the multi drug transporter. Ann Rev Bio chem,1993, 62: 385-427.    
    2  Sarkadi B,Ozvegy-Laczka C,Nemet K, et al. ABCG2-a transporter for all seasons. FEBS Lett,2004, 567(1): 116-120.    
    3  Lockhart AC, Tirona RG,Kim RB. Pharmacogenetics of ATP-binding cassette transporters in cancer and chemotherapy.  Mol Cancer Ther, 2003,2(7): 685-698.    
    4  Varadi A,Tusnady GE,Sarkadi B. ABC proteins: From Bacteria to Man. J Bio Chem, 2003, 22:37-46.    
    5  SV Ambudkar, MM Gottesman, CK Sarfaty,et al. P-glycoprotein: from genomics to mechanism. Oncogene, 2003, 22: 7468-7485.    
    6  Hrycyna CA, Ramachandra M, Gottesman MM, et al. Mechanism of Action of Human   P-glycoprotein ATPase Activity. J Bio Chem, 1988, 273: 16631-16634.    
    7  Urbatsch IL, SamKaran B, Weber J, et al. P-glycoprotein Is Stably Inhibited by Vanadate-induced Trapping of Nucleotide at a Single Catalytic Site.  J  Bio chem, 1995, 270: 19383-19390.    
    8  Ambudlcar SV, Carderelli CO, Pashinsky I, et al. Relation Between the Turnover Number for Vinblastine Transport and for Vinblastine-stimulated ATP Hydrolysis by Human P-glycoprotein. J Bio Chem, 1997, 272: 21160-21165.    
    9  Agnes Lo, Pharm D. P-glycoprotein and Drug Therapy in Organ transplantation.  J Clin Pharmacol, 1999, 39: 995-1005.    
    10  Fogo AT, Shen DW, Mickley LA, et al. Intrinsic drug resistance in human kidney cancer is associated with expression of a human multi drug-resistance gene. J Clin Oncol, 1987, 5: 1922-1927.    
    11  Johnson DR, Finch RA, Lin ZP, et al. The pharmacological phenotype of combined multi drug-resistance mdr1a/mdr1b-and mrp1-deficient mice. Cancer Res, 2001, 61: 1469-1476.    
    12  MV Relling. Are the major effects of  P-glycoprotein modulators due to altered pharmacokinetics of anticancer drugs? Therapeutic Drug Monitoring, 1996, 18: 350-356.    
    13  Sikic BI, Fisher GA, Lum BL, et al. Modulation and prevention of multi drug  resistance by inhibitors of  P-glycoprotein. Cancer Chemother Pharmacol, 1997, 40 (Suppl): S13-S19.    
    14  Rushing DA, Raber SR, Rodvold KA, et al. The effects of cyclosporine on the pharmacokinetics of doxorubicin in patients with small cell lung cancer. Cancer, 1994, 74: 834-841.     
    15  Chang YL, Chou MH, Lin MF, et al. Effect of cyclosporine a P-glycoprotein inhibitor on the pharmacokinetics of cefepime in rat blood and brain: a micro dialysis study. Life Sci, 2001, 69 (2):191.    
    16  Schuetz EG, Schinkel AH, Relling MV, et al. P-glycoprotein: a major determinant of rifampicin-inducible expression of cytochrome  P4503A in mice and humans. Proc Natl Acad Sci USA, 1996, 93: 4001-4005.    
    17  Atsushi Sakata. In vivo evidence for ATP-dependent and p-glycoprotein mediated transport of cyclosporin at the blood-brain barrier. Biochemical pharmacology, 1994, 48(10): 1989-1992.    
    18  Schinkel AH, Wagenaar E. Absence of the mdr a  P-glycoprotein in mice affects tissue distribution and pharmacokinetics of dexamethasone, digoxin and cyclosporin A. J Clin Invest, 1995, 96(4): 1698-1705.    
    19  De Lange EC, Marchand S, Van Den Berg D, et al. In vitro and in vivo investigations on fluoroquinolones effects of the P-glycoprotein efflux transporter on brain distribution of sparfloxacin.Eur  J  Pharm  Sci, 2000, 12(2): 85.    
    20  Wacher VJ, Wu CY, Benet LZ. Overlapping substrate specificity and tissue distribution of cytochrome P4503A and P-glycoprotein:  implications for drug delivery and activity in cancer chemotherapy.  Mol Carcinog, 1995, 13: 129-134.    
    21  Slaughter RL, Edwards DJ. Recent advances: the cytochrome P- 450 enzymes. Ann Pharmacother, 1995, 29: 619-624.    
    22  Schuetz EG, Beck WT, Schuetz JD. Modulators and substrates of P-glycoprotein and cytochrome P4503A coordinately up-regulate these proteins in human colon carcinoma cells. Mol Pharmacol, 1996, 49: 311-318.    
    23  Lum BL, Gosland MP. MDR expression in normal tissues: pharmacological implications for the clinical use of P-glycoprotein inhibitors.  Hematol Oncol Clin North Am, 1995, 9: 319-336.    
    24  Hori R, Okamura N, Aiba T, et al. Role of P-glycoprotein in renal tubular secretion of digoxin in the isolated perfused rat kidney.  J Pharmacol Exp Ther,1993,266:1620-1625.    
    25  Su S, Huang J. Inhibition of the intestinal digoxin absorption and exsorption by quinidine.Drug Metab Dispos, 1996, 24(2): 142.    
    26  KW Scotto. Transcriptional regulation of ABC drug transporters. Oncogene,2003, 22: 7496-7511.

本新闻共2页,当前在第2页  1  2  

 
上篇文章: 疱疹灵药效学研究  下篇文章: 氯沙坦和辛伐他汀对糖尿病大鼠肾脏NF-κBPDGF-B及PKCα表达的影响
网站首页 - 友情链接 - 网站地图 - 加入收藏

声明:免费毕业论文网资料来源于网络,如有侵犯您的权益,请立即告知,我们将删除!
联系方式: E-mail:Laozhanga@QQ.COM QQ:75931341
同时按下键盘 CTRL+D 会有惊喜发生哦!
冀ICP备07000828号