DAT-230, a Novel Microtubule Inhibitor, Induced Aberrant Mitosis and Apoptosis in SGC-7901 Cells

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  • Qiao Foxiao
    Department of Pharmacology, Shenyang Pharmaceutical University
  • Zuo Daiying
    Department of Pharmacology, Shenyang Pharmaceutical University
  • Wang Haifeng
    Department of Pharmacology, Shenyang Pharmaceutical University
  • Li Zengqiang
    Department of Pharmacology, Shenyang Pharmaceutical University
  • Qi Huan
    Department of Pharmacology, Shenyang Pharmaceutical University
  • Zhang Weige
    Key Laboratory of Structure-Based Drug Design & Discovery belong to Ministry of Education, Shenyang Pharmaceutical University
  • Wu Yingliang
    Department of Pharmacology, Shenyang Pharmaceutical University

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2-Methoxy-5-(2-(3,4,5-trimethoxyphenyl)thiophen-3-yl) aniline (DAT-230) is a novel synthesized compound of combretastatin-A-4 derivative with more stability. The present study is to investigate its anti-tumor activity and molecular mechanisms in human gastric adenocarcinoma SGC-7901 cells. DAT-230 inhibited SGC-7901 cells growth. The treatment of DAT-230 resulted in microtubule de-polymerization and G2/M phase arrest. Besides the accumulation and translocation of Cyclin B1, reduction of p-14/15-cdc2 and mitosis delay denoted the Cyclin B1-cdc2 complex active and M phase arrest in SGC-7901 cells treated with DAT-230. Mitochondria pathway participated in apoptosis after G2/M arrest in SGC-7901 cells treated with DAT-230, which was characterized by DNA fragmentation, cleavage of poly(ADP-ribose) polymerase (PARP), activation of caspase-3 and caspase-9, changes of Bcl-2 and Bax expression, decrease of mitochondrial membrane potential and release of cytochrome c from mitochondria. In vivo, DAT-230 delayed tumor growth in BALB/c nude mice with human gastric adenocarcinoma xenografts. Besides apoptosis was detected with terminal deoxynucleotidyl transferase mediated deoxyuridine triphosphate nick-end labeling (TUNEL) assay in tumor tissue. In conclusion, DAT-230 is a promising microtubule inhibitor with great anti-tumor activity to SGC-7901, in vitro and in vivo. Its potential to be a candidate of anti-cancer agent is worth of being further investigated.

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