Type

Journal Article

Authors

Kenneth O'Byrne
Prerna Tewari
Aidan Corvin
Derek Morris
Stephen Gray
Lydia Forde
Kathy Gately

Subjects

Biochemistry

Topics
tyrosine kinase single nucleotide polymorphisms cell growth non small cell lung cancer nsclc small cell lung cancer factor analysis non small cell lung epidermal growth factor receptor egfr

Mutational analysis of the insulin-like growth factor 1 receptor tyrosine kinase domain in non-small cell lung cancer patients. (2015)

Abstract The insulin-like growth factor 1 receptor (IGF1R) pathway plays an important role in the pathogenesis of non-small cell lung cancer (NSCLC) and also provides a mechanism of resistance to targeted therapies. IGF1R is therefore an ideal therapeutic target and several inhibitors have entered clinical trials. However, thus far the response to these inhibitors has been poor, highlighting the importance of predictive biomarkers to identify patient cohorts who will benefit from these targeted agents. It is well-documented that mutations and/or deletions in the epidermal growth factor receptor (EGFR) tyrosine kinase (TK) domain predict sensitivity of NSCLC patients to EGFR TK inhibitors. Single-nucleotide polymorphisms (SNPs) in the IGF pathway have been associated with disease, including breast and prostate cancer. The aim of the present study was to elucidate whether the IGF1R TK domain harbours SNPs, somatic mutations or deletions in NSCLC patients and correlates the mutation status to patient clinicopathological data and prognosis. Initially 100 NSCLC patients were screened for mutations/deletions in the IGF1R TK domain (exons 16-21) by sequencing analysis. Following the identification of SNP rs2229765, a further 98 NSCLC patients and 866 healthy disease-free control patients were genotyped using an SNP assay. The synonymous SNP (rs2229765) was the only aberrant base change identified in the IGF1R TK domain of 100 NSCLC patients initially analysed. SNP rs2229765 was detected in exon 16 and was found to have no significant association between IGF1R expression and survival. The GA genotype was identified in 53.5 and 49.4% of NSCLC patients and control individuals, respectively. No significant difference was found in the genotype (P=0.5487) or allele (P=0.9082) frequencies between the case and control group. The present findings indicate that in contrast to the EGFR TK domain, the IGF1R TK domain is not frequently mutated in NSCLC patients. The synonymous SNP (rs2229765) had no significant association between IGF1R expression and survival in the cohort of NSCLC patients.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Kenneth O'Byrne, Prerna Tewari, Aidan Corvin, Derek Morris, Stephen Gray, Lydia Forde, Kathy Gately

Experts in our system

1
Kenneth J O'Byrne
Trinity College Dublin
Total Publications: 36
 
2
Derek Morris
Trinity College Dublin
Total Publications: 150
 
3
Lydia Forde
Trinity College Dublin
Total Publications: 4
 
4
Kathy Gately
Trinity College Dublin
Total Publications: 19