Project description
Reducing SOS response to overcome resistance to anti-cancer drugs
Drug resistance is a challenge for cancer patients, particularly those treated with tyrosine kinase inhibitors (TKIs), because cancer cells activate SOS responses that lead to mutations. Blocking the AXL mediator can prevent relapses by EGFR inhibitors. However, current treatments only delay resistance. The ERC-funded ResistSOS project aims to develop strategies that minimise the SOS response by combining these effective yet mutagenic TKIs with drugs designed to disarm mutators. The project will focus on EGFR+ lung cancer, which frequently develops resistance. It uses omics tools to pinpoint exactly why cancer stops responding to treatment. These insights make it possible to test new ways to block the cancer’s repair systems and growth signals, while training the immune system to attack the tumour.
Objective
Background: A large fraction of cancer patients die because their tumors initially respond to drugs but later they evolve tolerance. Thus, resistance to diverse drugs, along with the soaring costs of new treatments, are emerging as major societal issues of the 2020s. Herein, we explore one of the most distressful examples, tolerance of lung cancer to EGFR-specific tyrosine kinase inhibitors (TKIs).
Working hypothesis: In similarity to bacteria exposed to antibiotics, when cancer cells are exposed to TKIs they enlist SOS responses, which activate endogenous mutators. Hence, we will combine the relatively effective but mutagenic TKIs with drugs that disarm the mutators. This scheme will be applied on models of EGFR+ lung cancer, a disease that repeatedly evolves mutations and resistance, but eventually leaves millions of patients with no treatment choices.
Specific aims: Our initial studies identified one triad of the SOS system: a sensor of cell death - GAS6, a mediator - AXL, GAS6’ receptor, and a mutator - low-fidelity DNA polymerases. Remarkably, blocking AXL using an antibody irreversibly prevented relapses when combined with EGFR inhibitors. Along with establishing this triad, we will employ transcriptomics, protetomics and metabolomics to resolve parallel mutators and sensors. Likewise, we will explore alternative ways to block resistance, for example by directly targeting DNA polymerases, MYC and purine metabolism. Aiming at strategies that minimize SOS enlisting, we will explore the premise of boosting immune destruction of cancer cells.
Significance: According to the current status quo, next-generation inhibitors are being applied when resistance emerges. However, this scheme does not cure, only buys time. ResistSOS offers an alternative that might eradicate resistance and cure disease models following treatments that are based on deep understanding and blocking the mutagenic SOS response.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences biological sciences microbiology bacteriology
- natural sciences biological sciences genetics mutation
- medical and health sciences basic medicine pharmacology and pharmacy pharmaceutical drugs antibiotics
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering sensors
- medical and health sciences clinical medicine oncology
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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HORIZON.1.1 - European Research Council (ERC)
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(opens in new window) ERC-2022-ADG
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7610001 Rehovot
Israel
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