Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Xiannongtan 1, Xicheng District, Beijing 100050, PR China; Chinese Pharmacological Society, Beijing 100050, PR China.
Pharmacol Ther. 2016 Jun;162:134-43. doi: 10.1016/j.pharmthera.2015.12.006. Epub 2015 Dec 17.
Microtubule-stabilizing agents (MSAs) have been highly successful in the treatment of cancer in the past 20years. To date, three classes of MSAs have entered the clinical trial stage or have been approved for clinical anticancer chemotherapy, and more than 10 classes of novel structural MSAs have been derived from natural resources. The microtubule typically contains two MSA-binding sites: the taxoid site and the laulimalide/peloruside site. All defined MSAs are known to bind at either of these sites, with subtle but significant differences. MSAs with different binding sites may produce a synergistic effect. Although having been extensively applied in the clinical setting, paclitaxel and other approved MSAs still pose many challenges such as multidrug resistance, low bioavailability, poor solubility, high toxicity, and low passage through the blood-brain barrier. A variety of studies focus on the structure-activity relationship in order to improve the pharmaceutical properties of these agents. Here, the mechanisms of action, advancements in pharmacological research, and clinical developments of defined MSAs during the past decade are discussed. The latest discovered MSAs are also briefly introduced in this review. The increasing number of natural MSAs indicates the potential discovery of more novel, natural MSAs with different structural bases, which will further promote the development of anticancer chemotherapy.
微管稳定剂 (MSAs) 在过去的 20 年中在癌症治疗方面取得了巨大成功。迄今为止,已有三类 MSA 进入临床试验阶段或已获准用于临床抗癌化疗,并且已经从天然资源中衍生出了超过 10 种新型结构的 MSA。微管通常包含两个 MSA 结合位点:紫杉烷位点和 laulimalide/peloruside 位点。所有已定义的 MSA 都已知与这两个位点之一结合,具有细微但显著的差异。具有不同结合位点的 MSA 可能产生协同作用。尽管已广泛应用于临床环境中,但紫杉醇和其他已批准的 MSA 仍存在许多挑战,如多药耐药性、生物利用度低、溶解度差、毒性高以及通过血脑屏障的能力低。各种研究都集中在构效关系上,以改善这些药物的药物特性。本文讨论了过去十年中定义明确的 MSA 的作用机制、药理学研究进展和临床发展。本文还简要介绍了最新发现的 MSA。越来越多的天然 MSA 表明,可能会发现更多具有不同结构基础的新型天然 MSA,这将进一步促进抗癌化疗的发展。