Journal
CELL CHEMICAL BIOLOGY
Volume 27, Issue 3, Pages 269-+Publisher
CELL PRESS
DOI: 10.1016/j.chembiol.2019.12.008
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Funding
- Canadian Institutes of Health Research Foundation [FDN154288]
- US Department of Energy, Office of Biological and Environmental Research [DE-AC02-06CH11357]
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services [HHSN272201700060C]
- Spanish Ministry of Education, Culture and Sports (FPU) [14/00818]
- AbbVie [1097737]
- Bayer Pharma AG
- Boehringer Ingelheim
- Canada Foundation for Innovation
- Eshelman Institute for Innovation
- Genome Canada
- Innovative Medicines Initiative (EU/EFPIA) [115766]
- Janssen
- Merck KGaA Darmstadt Germany
- MSD
- Novartis Pharma AG
- Ontario Ministry of Economic Development and Innovation
- Pfizer
- Sao Paulo Research Foundation-FAPESP
- Takeda
- Wellcome [106169/ZZ14/Z]
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New strategies are urgently needed to counter the threat to human health posed by drug-resistant fungi. To explore an as-yet unexploited target space for antifungals, we screened a library of protein kinase inhibitors for the ability to reverse resistance of the most common human fungal pathogen, Candida albicans, to caspofungin, a widely used antifungal. This screen identified multiple 2,3-aryl-pyrazolopyridine scaffold compounds capable of restoring caspofungin sensitivity. Using chemical genomic, biochemical, and structural approaches, we established the target for our most potent compound as Yck2, a casein kinase 1 family member. Combination of this compound with caspofungin eradicated drug-resistant C. albicans infection while sparing co-cultured human cells. In mice, genetic depletion of YCK2 caused an similar to 3-log(10) decline in fungal burden in a model of systemic caspofungin-resistant C. albicans infection. Structural insights and our tool compound's profile in culture support targeting the Yck2 kinase function as a broadly active antifungal strategy.
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