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- W2092437923 abstract "Tumour cells respond to an effective, targeted drug treatment with BRAF, ALK or EGFR kinase inhibitors by inducing a complex network of secreted signals that promote tumour growth, dissemination and metastasis of drug-resistant cancer cell clones, and increase the survival of drug-sensitive tumour cells, potentially contributing to incomplete tumour regression. Targeted kinase inhibitors such as have proved clinically effective in melanoma with BRAF mutations and in lung adenocarcinoma with EGFR mutations or ALK translocations, but drug resistance almost always follows. This study by Joan Massagué and colleagues shows that tumour cells responding to kinase inhibitors induce a complex network of secreted signals that promote tumour growth, dissemination and metastasis of drug-resistant cancer cell clones, and increase the survival of drug-sensitive tumour cells, potentially contributing to incomplete tumour regression. Drug resistance invariably limits the clinical efficacy of targeted therapy with kinase inhibitors against cancer1,2. Here we show that targeted therapy with BRAF, ALK or EGFR kinase inhibitors induces a complex network of secreted signals in drug-stressed human and mouse melanoma and human lung adenocarcinoma cells. This therapy-induced secretome stimulates the outgrowth, dissemination and metastasis of drug-resistant cancer cell clones and supports the survival of drug-sensitive cancer cells, contributing to incomplete tumour regression. The tumour-promoting secretome of melanoma cells treated with the kinase inhibitor vemurafenib is driven by downregulation of the transcription factor FRA1. In situ transcriptome analysis of drug-resistant melanoma cells responding to the regressing tumour microenvironment revealed hyperactivation of several signalling pathways, most prominently the AKT pathway. Dual inhibition of RAF and the PI(3)K/AKT/mTOR intracellular signalling pathways blunted the outgrowth of the drug-resistant cell population in BRAF mutant human melanoma, suggesting this combination therapy as a strategy against tumour relapse. Thus, therapeutic inhibition of oncogenic drivers induces vast secretome changes in drug-sensitive cancer cells, paradoxically establishing a tumour microenvironment that supports the expansion of drug-resistant clones, but is susceptible to combination therapy." @default.
- W2092437923 created "2016-06-24" @default.
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- W2092437923 date "2015-03-25" @default.
- W2092437923 modified "2023-10-12" @default.
- W2092437923 title "Therapy-induced tumour secretomes promote resistance and tumour progression" @default.
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- W2092437923 doi "https://doi.org/10.1038/nature14336" @default.
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