NT113, A pan-ERBB inhibitor with high brain penetrance, inhibits the growth of glioblastoma xenografts with EGFR amplification

Yasuyuki Yoshida, Tomoko Ozawa, Tsun Wen Yao, Wang Shen, Dennis Brown, Andrew T. Parsa, Jeffrey J. Raizer, Shi Yuan Cheng, Alexander H. Stegh, Andrew P. Mazar, Francis J. Giles, Jann N. Sarkaria, Nicholas Butowski, Theodore Nicolaides, C. David James

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


This report describes results from our analysis of the activity and biodistribution of a novel pan-ERBB inhibitor, NT113, when used in treating mice with intracranial glioblastoma (GBM) xenografts. Approaches used in this investigation include: bioluminescence imaging (BLI) for monitoring intracranial tumor growth and response to therapy; determination of survival benefit from treatment; analysis of tumor IHC reactivity for indication of treatment effect on proliferation and apoptotic response; Western blot analysis for determination of effects of treatment on ERBB and ERBB signaling mediator activation; and high-performance liquid chromatography for determination of NT113 concentration in tissue extracts from animals receiving oral administration of inhibitor. Our results show that NT113 is active against GBM xenografts in which wild-type EGFR or EGFRvIII is highly expressed. In experiments including lapatinib and/or erlotinib, NT113 treatment was associated with the most substantial improvement in survival, as well as the most substantial tumor growth inhibition, as indicated by BLI and IHC results. Western blot analysis results indicated that NT113 has inhibitory activity, both in vivo and in vitro, on ERBB family member phosphorylation, as well as on the phosphorylation of downstream signaling mediator Akt. Results from the analysis of animal tissues revealed significantly higher NT113 normal brain-to-plasma and intracranial tumor-to-plasma ratios for NT113, relative to erlotinib, indicating superior NT113 partitioning to intracranial tissue compartments. These data provide a strong rationale for the clinical investigation of NT113, a novel ERBB inhibitor, in treating patients with GBM.

Original languageEnglish (US)
Pages (from-to)2919-2929
Number of pages11
JournalMolecular cancer therapeutics
Issue number12
StatePublished - Dec 1 2014

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


Dive into the research topics of 'NT113, A pan-ERBB inhibitor with high brain penetrance, inhibits the growth of glioblastoma xenografts with EGFR amplification'. Together they form a unique fingerprint.

Cite this