Pharmacology of the Taxanes

Pharmacology of the Taxanes
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紫杉烷类药物的药理学

DOI:
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发表时间:
1997
期刊:
影响因子:
4.1
通讯作者:
R. Dorr
R. Dorr
中科院分区:
医学2区
文献类型:
--
作者:
R. Dorr

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紫杉醇和多西紫杉醇在结构上相似,但具有不同的药理特性。两者都与微管蛋白的β亚基结合,并影响微管聚合。药物影响细胞周期时相明显不同,紫杉醇抑制细胞周期穿越于G2-M期,多西紫杉醇对S期细胞的杀伤作用最强。这两种药物都经历了肝脏代谢;然而,负责羟化的特定细胞色素P-450(CYP)酶是紫杉醇的CYP 2C8和多西紫杉醇的CYP 3A4。紫杉烷的细胞毒作用是时程依赖的。对于这两种药物,较长的暴露时间都会增加细胞毒性。目前正在进行研究,以确定长期接触癌细胞是否会增加敏感肿瘤患者的应答率。紫杉醇和多西紫杉醇在作用机制和代谢方面的差异可能会影响癌症患者的临床疗效和安全性。
The taxanes paclitaxel and docetaxel are structurally similar, but they have different pharmacologic characteristics. Both bind to the β‐subunit of tubulin and affect microtubule polymerization. The cell cycle phases affected by the drugs are distinctly different; paclitaxel inhibits cell cycle traverse at the G2‐M phase junction, and docetaxel produces maximum cell killing against cells in S phase. The drugs both undergo hepatic metabolism; however, the specific cytochrome P‐450 (CYP) enzymes responsible for hydroxylation are CYP 2C8 for paclitaxel and CYP 3A4 for docetaxel. The cytotoxic effects of the taxanes are schedule dependent. For both drugs, longer durations of exposure increase cytotoxicity. Studies are being conducted to determine if prolonged exposure in cancer cell lines increases response rates in patients with sensitive tumors. The distinct mechanistic and metabolic differences between paclitaxel and docetaxel may influence clinical efficacy and safety in patients with cancer.
DOI: --
发表时间: 1993
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影响因子: 11.4
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紫杉醇在细胞培养基中转化为 7-epitasol(一种生物活性异构体)。
DOI: --
发表时间: 1987
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发表时间: 1994-11-04
期刊: SCIENCE
影响因子: 56.9
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