Ras-Related Protein Rab-32 and Thrombospondin 1 Confer Resistance to the EGFR Tyrosine Kinase Inhibitor Osimertinib by Activating Focal Adhesion Kinase in Non-Small Cell Lung Cancer

Treatment with the tyrosine kinase inhibitor (TKI) osimertinib is the standard of care for non-small cell lung cancer (NSCLC) patients with activating mutations in the epidermal growth factor receptor (EGFR). Osimertinib is also used in T790M-positive NSCLC that may occur de novo or be acquired foll...

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Veröffentlicht in:CANCERS 2022-07, Vol.14 (14), p.3430
Hauptverfasser: Kosibaty, Zeinab, Brustugun, Odd Terje, Zwicky Eide, Inger Johanne, Tsakonas, Georgios, Grundberg, Oscar, De Petris, Luigi, McGowan, Marc, Hydbring, Per, Ekman, Simon
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container_issue 14
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container_title CANCERS
container_volume 14
creator Kosibaty, Zeinab
Brustugun, Odd Terje
Zwicky Eide, Inger Johanne
Tsakonas, Georgios
Grundberg, Oscar
De Petris, Luigi
McGowan, Marc
Hydbring, Per
Ekman, Simon
description Treatment with the tyrosine kinase inhibitor (TKI) osimertinib is the standard of care for non-small cell lung cancer (NSCLC) patients with activating mutations in the epidermal growth factor receptor (EGFR). Osimertinib is also used in T790M-positive NSCLC that may occur de novo or be acquired following first-line treatment with other EGFR TKIs (i.e., gefitinib, erlotinib, afatinib, or dacomitinib). However, patients treated with osimertinib have a high risk of developing resistance to the treatment. A substantial fraction of the mechanisms for resistance is unknown and may involve RNA and/or protein alterations. In this study, we investigated the full transcriptome of parental and osimertinib-resistant cell lines, revealing 131 differentially expressed genes. Knockdown screening of the genes upregulated in resistant cell lines uncovered eight genes to partly confer resistance to osimertinib. Among them, we detected the expression of Ras-related protein Rab-32 (RAB32) and thrombospondin 1 (THBS1) in plasmas sampled at baseline and at disease progression from EGFR-positive NSCLC patients treated with osimertinib. Both genes were upregulated in progression samples. Moreover, we found that knockdown of RAB32 and THBS1 reduced the expression of phosphorylated focal adhesion kinase (FAK). Combination of osimertinib with a FAK inhibitor resulted in synergistic toxicity in osimertinib-resistant cells, suggesting a potential therapeutic drug combination for overcoming resistance to osimertinib in NSCLC patients.
doi_str_mv 10.3390/cancers14143430
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Osimertinib is also used in T790M-positive NSCLC that may occur de novo or be acquired following first-line treatment with other EGFR TKIs (i.e., gefitinib, erlotinib, afatinib, or dacomitinib). However, patients treated with osimertinib have a high risk of developing resistance to the treatment. A substantial fraction of the mechanisms for resistance is unknown and may involve RNA and/or protein alterations. In this study, we investigated the full transcriptome of parental and osimertinib-resistant cell lines, revealing 131 differentially expressed genes. Knockdown screening of the genes upregulated in resistant cell lines uncovered eight genes to partly confer resistance to osimertinib. Among them, we detected the expression of Ras-related protein Rab-32 (RAB32) and thrombospondin 1 (THBS1) in plasmas sampled at baseline and at disease progression from EGFR-positive NSCLC patients treated with osimertinib. Both genes were upregulated in progression samples. 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subjects Biopsy
Cancer therapies
Chemotherapy
Drug resistance
Drug therapy
Enzyme inhibitors
Epidermal growth factor
Epidermal growth factor receptors
Focal adhesion kinase
Gefitinib
Gene expression
Genetic aspects
Health aspects
Kinases
Lung cancer
Lung cancer, Non-small cell
Mutation
Non-small cell lung carcinoma
Patients
Protein kinases
Proteins
Ras protein
Small cell lung carcinoma
Thrombospondin
Toxicity
Transcriptomes
Tyrosine kinase inhibitors
Wound healing
title Ras-Related Protein Rab-32 and Thrombospondin 1 Confer Resistance to the EGFR Tyrosine Kinase Inhibitor Osimertinib by Activating Focal Adhesion Kinase in Non-Small Cell Lung Cancer
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