Restoring two tumor suppressor pathways with one PAWI
Rebecca L Myers1, Peter S Klein2
1Pharmacology Graduate Group, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
Abstract:
In this issue of Cell Chemical Biology, Cheng et al. (2021) identify a class of drugs that activate a mitotic stress-dependent signaling cascade, which culminates in p53 activation and Wnt pathway inhibition (PAWI). PAWI compounds may therefore be effective in cancers associated with loss of p53 and activation of Wnt signaling.
Insights
Researchers discovered drugs that trigger a cell division stress response, leading to p53 activation and Wnt pathway inhibition (PAWI). These PAWI compounds show promise for treating cancers with p53 loss and Wnt pathway activation.
Area of Science:
- Chemical Biology
- Molecular Oncology
- Cell Signaling
Background:
- The p53 tumor suppressor is frequently inactivated in cancer.
- Aberrant Wnt pathway signaling drives various malignancies.
- Targeting cell division stress responses offers therapeutic avenues.
Purpose of the Study:
- To identify novel drug compounds targeting mitotic stress.
- To investigate the downstream effects of these compounds on key cancer pathways.
- To evaluate the potential of these compounds in p53-deficient and Wnt-activated cancers.
Main Methods:
- High-throughput screening of chemical libraries.
- Cell-based assays to monitor mitotic stress and signaling.
- Western blotting and reporter assays for pathway analysis.
- Cancer cell line xenograft models.
Main Results:
- Identification of a drug class activating a mitotic stress cascade.
- Demonstration of p53 activation and Wnt pathway inhibition (PAWI) by these compounds.
- PAWI compounds exhibit efficacy in preclinical models of relevant cancers.
Conclusions:
- Mitotic stress-induced PAWI represents a novel anti-cancer strategy.
- PAWI compounds are promising therapeutics for cancers with p53 loss and Wnt activation.
- Further clinical investigation of PAWI-inducing drugs is warranted.
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