TD-19, an erlotinib derivative, induces epidermal growth factor receptor wild-type nonsmall-cell lung cancer apoptosis through CIP2A-mediated pathway.

Published

Journal Article

Some patients with nonsmall-cell lung cancer (NSCLC) without epidermal growth factor receptor (EGFR) mutations still respond to gefitinib and erlotinib, suggesting that there may be a mechanism(s) other than the EGFR pathway that mediates the tumoricidal effects. In the current study, we tested the efficacy of TD-19, a novel compound chemically modified from erlotinib, which has more potent apoptotic effects than erlotinib in EGFR wild-type NSCLC cell lines. TD-19 induced significant cell death and apoptosis in H358, H441, H460, and A549 cells, as evidenced by increased caspase-3 activity and cleavage of procaspase-9 and poly (ADP-ribose) polymerase. The apoptotic effect of TD-19 in H460 cells, which were resistant to erlotinib, was associated with downregulation of cancerous inhibitor of protein phosphatase 2A (CIP2A), increased protein phosphatase 2A (PP2A) activity, and decreased AKT phosphorylation, but minimal effects on EGFR phosphorylation. Overexpression of CIP2A partially protected the H460 cells from TD-19-induced apoptosis. Okadaic acid, a known PP2A inhibitor, significantly reduced TD-19-induced apoptosis, while forskolin, which increased PP2A activity, increased the apoptotic effect of TD-19. TD-19 inhibited the growth of H460 xenograft tumors by ∼80%. We conclude that TD-19 exerted tumoricidal effects on NSCLC cells. TD-19 provides proof that the CIP2A pathway may be a novel target for the treatment of EGFR wild-type NSCLC.

Full Text

Duke Authors

Cited Authors

  • Chao, T-T; Wang, C-Y; Lai, C-C; Chen, Y-L; Tsai, Y-T; Chen, P-T; Lin, H-I; Huang, Y-CT; Shiau, C-W; Yu, C-J; Chen, K-F

Published Date

  • November 2014

Published In

Volume / Issue

  • 351 / 2

Start / End Page

  • 352 - 358

PubMed ID

  • 25187431

Pubmed Central ID

  • 25187431

Electronic International Standard Serial Number (EISSN)

  • 1521-0103

International Standard Serial Number (ISSN)

  • 0022-3565

Digital Object Identifier (DOI)

  • 10.1124/jpet.114.215418

Language

  • eng