A class of novel tubulin polymerization inhibitors exert effective anti-tumor activity via mitotic catastrophe.

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A class of novel tubulin polymerization inhibitors exert effective anti-tumor activity via mitotic catastrophe.

Eur J Med Chem. 2019 Feb 01;163:896-910

Authors: Zhang YL, Li BY, Yang R, Xia LY, Fan AL, Chu YC, Wang LJ, Wang ZC, Jiang AQ, Zhu HL

Abstract
In current work, a class of novel 4,5-dihydro-1H-pyrazole-1-carboxylate derivatives (E01-E28) were designed, synthesized and evaluated. Among them, the most potent compound E24 exhibited comparable activity against a panel of cancer cells (GI50 ranging 0.05-0.98 μM) and tubulin polymerization inhibition (IC50 = 1.49 μM) with reference drug CA-4(P) (GI50 ranging 0.019-0.32 μM, IC50 = 2.18 μM). The following assays indicated that compound E24 disturbed the dynamics of tubulin catastrophe and rescue, which triggered G2/M arrest, leading to ROS accumulation, cleavage of PARP and apoptosis. Molecular dynamics simulation validated that compound E24 could tightly bind into tubulin heterodimers with β Lys 254 and β Cys 241 of tubulin in the docking pose. Metabolic stability and pharmacokinetics parameters were also determined. The half time (t1/2) displayed species differences in three microsomes. The plasma elimination half-life (t1/2), peak plasma concentration (Cmax), mean retention time (MRT), the area under the curve (AUC0-∞) and distribution volume (Vz) of E24 after intravenous administration were 0.90 ± 0.22 h, 594.50 ± 97.23 ng/mL, 1.09 ± 0.22 h, 413.67 ± 105.64 ng/mL*h and 5.03 ± 1.82 L/kg, respectively. In HeLa-xenografts, compound E24 exhibited obvious antitumor efficacy via the suppression of tumor growth without weight loss of body or organ. In brief, compound E24 might be a hopeful candidate with excellent properties for oncotherapy as tubulin polymerization inhibitor.

PMID: 30580241 [PubMed - indexed for MEDLINE]

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