Mouse xenograft models (cell line- and patient-derived) with TRK, ROS1 and ALK fusions, including an orthotopic glioma model
“entrectinib demonstrated response towards 9 TRK1,3-driven and 3 ROS1-driven tumour models (both cell-based and patient-derived xenografts of which only 1 orthotopic model for glioma)”
Non-clinical models cannot reflect the clinical range of tissue contexts and gene fusions of a histology-independent indication
“it is understood that it is not possible to reflect with non-clinical models the wide clinical pattern in terms of tissue environment and pathophysiological context including gene fusion events.”
EMA: pharmacology package insufficient to extrapolate activity to all TRK fusions and tumour histologies, including paediatric tumours
“In light of the claimed site and histology independent indication, the non-clinical pharmacological data-package is considered insufficient to extrapolate activity in all clinical TRK fusions and tumour histologies including paediatric tumours.”