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ATAC-seq of NCI-H358 cells treated with KRAS G12C inhibitor sotorasib

ABSTRACT: ATAC-seq of NCI-H358 cells treated with KRAS G12C inhibitor sotorasib

PROVIDER: PRJNA1106537 | ENA |

REPOSITORIES: ENA

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Development of acquired resistance to sotorasib in NCI-H358 cell line in vitro

Project description:NCI-H358 is a KRAS G12C-mutant non-small lung cancer cell line known to be sensitive to KRAS G12C-inhibitor sotorasib. Here, we aimed to develop sotorasib resistance in H358 and interrogate the resulting sotorasib-resistant cell line (H358-R). The H358-R cell line was created by continuous culturing of the H358 cells in sotorasib (250 nM) until cells grew readily under sotorasib pressure (approximately 2 months). We then performed RNA-seq of the resulting sotorasib-resistant cell line (H358-R) with and without sotorasib pressure, compared to the parental sensitive cell line control (H358). KRAS gene expression level was found to be increased in the sotorasib-resistant line compared with the parental cells, likely representing a mechanism of resistance. The increased KRAS expression level in the resistant cell line was maintained under sotorasib pressure.

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ATAC-seq of NCI-H358 cells treated with KRAS G12C inhibitor sotorasib

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Targeting KRAS mutant cancers with a covalent G12C-specific inhibitor

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Project description:The efficacy of KRAS-G12C inhibitors in lung cancer is limited by the rapid onset of acquired resistance. While divergent mechanisms of resistance across patients and preclinical models have complicated efforts to identify therapeutic strategies for sotorasib-resistant cancers, we found that sotorasib-resistant H358 and LU65 cell lines, which have distinct mechanisms of resistance and drug sensitivity profiles, both exhibited increased vulnerability to treatment with SR-4835, an inhibitor of the transcriptional kinases CDK12 and CDK13. To identify CDK12/13-dependent genes linked to the increased sensitivity we observed in sotorasib-resistant over parental cells, we treated parental and sotorasib-resistant H358 and LU65 cells with SR-4835 and performed RNA sequencing.

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