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Gene expression profiles of an ALK-fusion driven cell line and its derivatives resistant to crizotinib alone or resistant to crizotinib plus afatinib

ABSTRACT: Gene expression profiles of an ALK-fusion driven cell line and its derivatives resistant to crizotinib alone or resistant to crizotinib plus afatinib

PROVIDER: PRJNA1000507 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25463533_1.fastq.gz	Fastqsanger.gz
	SRR25463533_2.fastq.gz	Fastqsanger.gz
	SRR25463534_1.fastq.gz	Fastqsanger.gz
	SRR25463534_2.fastq.gz	Fastqsanger.gz
	SRR25463535_1.fastq.gz	Fastqsanger.gz

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Gene expression profiles of an ALK-fusion driven cell line and its derivatives resistant to crizotinib alone or resistant to crizotinib plus afatinib

Project description:Despite the initial benefit of the tyrosine kinase inhibitors targeting ALK gene fusions in non-small cell lung cancer, resistance to ALK inhibitors is almost inevitable. To determine the acquired resistance mechanism to ALK inhibition, we generated crizotinib-resistant ALK lines by chronically treating H3122 cells (driven by EML4-ALK) with an ALK inhibitor, crizotinib for approximately 3 months. RNA-seq and differential expression analyses were performed to determine the transcriptional changes of H3122-CR cells in comparison to parental H3122 cells. Because we demonstrated EGFR could mediate the early adaptive resistance to crizotinib, we further explored the mechanism that contributes to the resistance to the combination of crizotinib and afatinib. H3122-CAR (crizotinib and afatinib-resistant) cells were generated by treating them with a combination of crizotinib and afatinib for approximately 6 months and then profiled by RNA-seq to determine the associated transcriptional reprogramming.

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Analysis of ALK TKI sensitive and ALK TKI resistant isogenic pairs of H3122 (EML4-ALK E13;A20) cells

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Project description:In this study we have analysed the transcription profile of ALK rearranged cell lines (COST, DEL, JB6, KARPAS, SR786, SUPM2, TS). The analysis was done on untreated cell lines and on the te same cell lines surviving to progressive increasing addition of crizotinib to the culture medium. Crizotinib concentration was progressively increased to reach a final concentration of 1 μM. The resulting pool of resistant cells (designated crizotinib-resistant (CR)) were maintained in RPMI with 10% FBS containing 0.5-1 μM crizotinib.

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Project description:Crizotinib is a first-line targeted therapy against EML4-ALK fusion in non-small cell lung cancer (NSCLC), but the increased resistance limits its clinical application. However, the mechanisms underlying such resistance are largely unexplored. The present study identified ALK protein overexpression in crizotinib-resistant H3122CR cells through immunoblotting. Then, liquid chromatography tandem mass spectrometry-based metabolomics was adopted to investigate metabolic responses. Crizotinib resistance was associated with the reduction of the total lipid content and the increase of organic acid, featuring the upregulation of lipid metabolism. Fatty acid β-oxidation pathway reprogrammed crizotinib-sensitive metabolome to crizotinib-resistant metabolome, resulting in crizotinib resistance. These findings reveal a previously unknown mechanism of crizotinib resistance and suggest promising applications of this approach in prognostic prediction and tailored therapeutics of NSCLC patients.

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Project description:To investigate a possible candidate for overcoming the acquired resistance to ALK-TKI, we established an in vitro model of acquired resistance to crizotinib (H3122-CR) by exposing EML4-ALK–positive H3122 lung cancer cells to increasing doses of crizotinib.

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