| Home > Publications database > Low level of antioxidant capacity biomarkers but not target overexpression predicts vulnerability to ROS-inducing drugs. |
| Journal Article | DKFZ-2023-00591 |
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2023
Elsevier
Amsterdam [u.a.]
Abstract: Despite a strong rationale for why cancer cells are susceptible to redox-targeting drugs, such drugs often face tumor resistance or dose-limiting toxicity in preclinical and clinical studies. An important reason is the lack of specific biomarkers to better select susceptible cancer entities and stratify patients. Using a large panel of lung cancer cell lines, we identified a set of 'antioxidant-capacity' biomarkers (ACB), which were tightly repressed, partly by STAT3 and STAT5A/B in sensitive cells, rendering them susceptible to multiple redox-targeting and ferroptosis-inducing drugs. Contrary to expectation, constitutively low ACB expression was not associated with an increased steady state level of reactive oxygen species (ROS) but a high level of nitric oxide, which is required to sustain high replication rates. Using ACBs, we identified cancer entities with a high percentage of patients with favorable ACB expression pattern, making it likely that more responders to ROS-inducing drugs could be stratified for clinical trials.
Keyword(s): Biomarker ; Ferroptosis ; NRF2 ; Nitric oxide ; TXNRD1 inhibitor
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