Design, Synthesis, and Preliminary Bioactivity Evaluation of 2,7-Substituted Carbazole Derivatives as Potent Autotaxin Inhibitors and Antitumor Agents†

Anti-cancer Agents in Medicinal Chemistry
Wenming WangHongfei Wang

Abstract

Autotaxin-LPA signaling has been implicated in cancer progression, and targeted for the discovery of cancer therapeutic agents. Potential ATX inhibitors were synthesized to develop novel leading compounds and effective anticancer agents. The present work designs and synthesizes a series of 2,7-subsitituted carbazole derivatives with different terminal groups R [R = -Cl (I), -COOH (II), -B(OH)2 (III), or -PO(OH)2 (I-IV)]. The inhibition of these compounds on the enzymatic activity of ATX was measured using FS-3 and Bis-pNpp as substrates, and the cytotoxicity of these compounds was evaluated using SW620, SW480, PANC-1, and SKOV-3 human carcinoma cells. Furthermore, the binding of leading compound with ATX was analyzed by molecular docking. Compound III was shown to be a promising antitumor candidate by demonstrating both good inhibition of ATX enzymatic activity and high cytotoxicity against human cancer cell lines. Molecular docking study shows that compound III is located in a pocket, which mainly comprises amino acids 209 to 316 in domain 2 of ATX, and binds with these residues of ATX through van der Waals, conventional hydrogen bonds, and hydrophobic interactions. Compound III with the terminal group R = -B(OH)2 has the most...Continue Reading

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