Contact us  to learn more about
our Premium Content:  News alerts, weekly reports and conference planners

EGFR E746_A750del

Other names: EGFR, ERBB, ERBB1, Epidermal growth factor receptor
Entrez ID:
High-Definition PCR (HDPCR) Detection of Precision Biomarkers in Non-Small Cell Lung Cancer Samples (AMP 2022)
This HDPCR prototype assay includes relevant research biomarkers in current National Comprehensive Cancer Network (NCCN) guidelines, including variants in EGFR, BRAF, KRAS, ERBB2, ALK, ROS1, RET, MET, and NTRK1/2/3, and has shown sensitive and specific performance. In addition, this assay leverages a proprietary bioinformatics suite, the ChromaCode Cloud, to report relevant variants with the click of a button, allowing for an easily adopted solution to testing needs.
EGFR (Epidermal growth factor receptor) • HER-2 (Human epidermal growth factor receptor 2) • BRAF (B-raf proto-oncogene) • KRAS (KRAS proto-oncogene GTPase) • ALK (Anaplastic lymphoma kinase) • ROS1 (Proto-Oncogene Tyrosine-Protein Kinase ROS) • NTRK1 (Neurotrophic tyrosine kinase, receptor, type 1) • NTRK3 (Neurotrophic tyrosine kinase, receptor, type 3) • NTRK2 (Neurotrophic tyrosine kinase, receptor, type 2)
EGFR mutation • KRAS G12C • EGFR L858R • EGFR exon 20 insertion • KRAS G12 • EGFR exon 20 mutation • EGFR E746_A750del • EGFR E746
Efficacy of osimertinib in patients with EGFR mutant lung cancer harboring the uncommon exon 19 deletion, L747_A750>P. (ASCO 2022)
The del19 mutation L747_A750 > P is associated with inferior PFS compared to the common E746_A750del mutation in pts treated with 1L osimertinib. Understanding differences in osimertinib efficacy among EGFR del19 subtypes could alter management of these pts in the future.
EGFR (Epidermal growth factor receptor)
EGFR mutation • EGFR exon 19 deletion • EGFR T790M • EGFR E746_A750del • EGFR E746 • EGFR L747_A750>P
Tagrisso (osimertinib)
Next-generation sequencing revealed clonal architecture and faciliated diagnosis of patients with multiple lung tumors: An analysis of 12 cases (AACR 2022)
However, caution is warranted when NGS detects no aberration from any of the multiple sequenced nodules. Examination of the mutational landscape found that altered proto-oncogene KRAS was associated with smaller tumors whereas altered tumor suppressors TP53 and CDKN2A associated with smaller ones, suggesting different roles in these molecules play in tumor growth.
Clinical • Next-generation sequencing
EGFR (Epidermal growth factor receptor) • KRAS (KRAS proto-oncogene GTPase) • ALK (Anaplastic lymphoma kinase) • TP53 (Tumor protein P53) • MAP2K1 (Mitogen-activated protein kinase kinase 1) • CDKN2A (Cyclin-dependent kinase inhibitor 2A) • GNAS (GNAS Complex Locus)
KRAS mutation • EGFR mutation • EGFR L858R • EGFR exon 19 deletion • ALK fusion • EGFR G719A • EGFR exon 18 mutation • EGFR E746_A750del • EGFR E746
Epiregulin confers EGFR-TKI resistance via EGFR/ErbB2 heterodimer in non-small cell lung cancer. (PubMed, Oncogene)
Among the EGFR ligands, EREG significantly diminished cellular sensitivity to TKIs and was associated with decreased response to erlotinib in NSCLC patients...EREG induced the formation of the EGFR/ErbB2 heterodimer regardless of gefitinib treatment...In addition, EREG-enriched macrophage conditional medium induced EGFR-TKI resistance. These findings shed new light on the mechanism underlying EGFR-TKI resistance, and suggest macrophage-produced intratumoral EREG as a novel regulator and biomarker for EGFR-TKI therapy in NSCLC.
EGFR (Epidermal growth factor receptor) • HER-2 (Human epidermal growth factor receptor 2) • EREG (Epiregulin)
EGFR mutation • EGFR E746_A750del • EREG overexpression • EGFR E746
erlotinib • gefitinib