Synthesis and biological activity of analogues of the antimicrotubule agent N,beta,beta-trimethyl-L-phenylalanyl-N(1)-[(1S,2E)-3-carboxy-1-isopropylbut-2-enyl]- N(1),3-dimethyl-L-valinamide (HTI-286).
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| Abstract |
Hemiasterlin, a tripeptide isolated from marine sponges, induces microtubule depolymerization and mitotic arrest in cells. HTI-286, an analogue from an initial study of the hemiasterlins, is presently in clinical trials. In addition to its potent antitumor effects, 2 has the advantage of circumventing the P-glycoprotein-mediated resistance that hampers the efficacy of other antimicrotubule agents such as paclitaxel and vincristine in animal models. This paper describes an in-depth study of the structure--activity relationships of analogues of 2, their effects on microtubule polymerization, and their in vitro and in vivo anticancer activity. Regions of the molecule necessary for potent activity are identified. Groups tolerant of modification, leading to novel analogues, are reported. Potent analogues identified through in vivo studies in tumor xenograft models include one superior analogue, HTI-042.
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| Authors | Arie Zask, Gary Birnberg, Katherine Cheung, Joshua Kaplan, Chuan Niu, Emily Norton, Ronald Suayan, Ayako Yamashita, Derek Cole, Zhilian Tang, Girija Krishnamurthy, Robert Williamson, Gulnaz Khafizova, Sylvia Musto, Richard Hernandez, Tami Annable, Xiaoran Yang, Carolyn Discafani, Carl Beyer, Lee M Greenberger, Frank Loganzo, Semiramis Ayral-Kaloustian |
| Journal | Journal of medicinal chemistry (J Med Chem) Vol. 47 Issue 19 Pg. 4774-86 (Sep 09 2004) ISSN: 0022-2623 [Print] United States |
| PMID | 15341492 (Publication Type: Journal Article) |
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