RNA structural dynamics modulate EGFR-TKIs resistance through controlling YRDC translation in NSCLC cells
Shi, B.
Show abstract
Epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) positively affect the initial control of non-small cell lung cancer (NSCLC). The rapidly acquired TKIs resistance accounts for a major hurdle in successful treatment. However, the mechanisms controlling EGFR-TKIs resistance remain largely unknown. RNA structures have widespread and crucial roles in various biological processes; but, their role in regulating cancer drug resistance remains unclear. Here, the PARIS method is used to establish the higher-order RNA structure maps of EGFR-TKI resistant- and sensitive-cells of NSCLC. According to our results, RNA structural regions are enriched in UTRs and correlate with translation efficiency. Moreover, YRDC facilitates resistance to EGFR-TKIs in NSCLC cells, and RNA structure formation in YRDC 3UTR suppress ELAVL1 binding leading to EGFR-TKIs sensitivity by impairing YRDC translation. A potential cancer therapy strategy is provided by using antisense oligonucleotide (ASO) to perturb the interaction between RNA and protein. Our study reveals an unprecedented mechanism in which the RNA structure switch modulates EGFR-TKIs resistance by controlling YRDC mRNA translation in an ELAVL1-dependent manner.
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