Novel Tumor-specific Mutations in Receptor Tyrosine Kinase Subdomain IX Significantly Reduce Extracellular Signal-regulated Kinase Activity.
Anticancer Res 2016;
36:2733-2744. [PMID:
27272783]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 05/08/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND/AIM
The identification of additional therapeutic targets by clinical molecular profiling is necessary to expand the range of molecular-targeted cancer therapeutics. This study aimed to identify novel functional tumor-specific single nucleotide variants (SNVs) in the kinase domain of receptor tyrosine kinases (RTKs), from whole-exome sequencing (WES) data.
MATERIALS AND METHODS
SNVs were selected from WES data of multiple cancer types using both cancer-related databases and the index reflecting molecular evolution. Immunoblotting and luciferase assay were performed to assess the function of selected SNVs.
RESULTS
Among the seven selected SNVs, two, namely neurotrophic receptor tyrosine kinase 1 (NTRK1) V710A and fms related tyrosine kinase 3 (FLT3) K868N, detected in kinase subdomain IX, were investigated. These SNVs inhibited the autophosphorylation of the respective RTKs, thereby reducing the activity of extracellular signal-regulated kinases.
CONCLUSION
RTK subdomain IX is a promising target for the molecular design of kinase inhibitors.
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