Relationships between the structure of taxol analogs and their antimitotic activity
作者:Francoise Gueritte-Voegelein、Daniel Guenard、Francois Lavelle、Marie Therese Le Goff、Lydie Mangatal、Pierre Potier
DOI:10.1021/jm00107a017
日期:1991.3
A variety of synthetic analogues of taxol, a naturally occurring antitumor diterpene, were examined for their potency to inhibit microtubule disassembly. For some of the compounds, the in vitro cytotoxic properties showed a good correlation with the tubulin assay. This structure-activity relationship study shows that inhibition of microtubule disassembly is quite sensitive to the configuration at C-2'
Combination of Paclitaxel and Nitric Oxide as a Novel Treatment for the Reduction of Restenosis
作者:Chia-En Lin、David S. Garvey、David R. Janero、L. Gordon Letts、Przemyslaw Marek、Stewart K. Richardson、Diana Serebryanik、Matthew J. Shumway、S. William Tam、A. Mark Trocha、Delano V. Young
DOI:10.1021/jm0304111
日期:2004.4.1
The combination of a nitric oxide (NO) donor and a paclitaxel-NO donor conjugate coated on a vascular stent was tested in a rabbit iliac artery model of stenosis as a potential therapy for restenosis. Paclitaxel was conjugated with a NO donor at the 7-position to give compound 7. An adamantane-based NO donor 14 was synthesized and combined with 7 to provide a burst of NO in the first few critical hours following injury to the vessel wall. Both 7 and 14 demonstrated antiproliferative activity (IC50 = 20 nM and 15 muM, respectively) and antiplatelet activity (IC50 = 10 and 1 muM, respectively). Stents were coated with a layer of a polymer containing test compounds. The total amount of NO eluted from the stents after a 6 h implantation in the rabbit iliac artery was 35,70, 95%, and 69% of the original content for the stents coated with 7, 14, and the combination of 7 and 14, respectively. The antistenotic activity of 7 and 14 was determined in a 28-day rabbit model with two control groups (uncoated stents and polymer-coated stents) and two study groups (paclitaxel-coated stents and stents coated with the combination of 7 and 14). Polymer-coated stents caused inflammation and increased stenosis by 39% when compared to the uncoated stents. The stents coated with 7 plus 14 were as good as the uncoated stents, 41% better than the polymer-coated stents and 34% better than the paclitaxel-coated stents. These data indicate a beneficial effect of adding NO to an antiproliferative agent (paclitaxel) and suggest a potential therapeutic combination for the treatment of stenotic vessel disease.