Antifungal drugs differentially modulate MAPK responses in C. auris. (A) Caspofungin treatment modulates MAPK signaling pathways in C. auris. Logarithmically growing Candida auris cultures were treated with 100 ng/ml caspofungin for 15 min and washed once with ice-cold water, and whole-cell extracts were prepared for immunoblotting as described in the legend to Fig. 5A. Densitometry was performed using Image Studio software (Li-Cor). Data are expressed as fold change normalized to the PSTAIR (Cdc28) loading control; extracts from untreated control strains were set to 1. Results are from two independent biological samples (±SD; *, P ≤ 0.05; **, P ≤ 0.005; ***, P ≤ 0.0005; ****, P < 0.0001). Striped columns indicate the drug (CAS) treatment. (B) Amphotericin B treatment modulates MAPK signaling pathways in C. auris. Logarithmically growing Candida auris cultures were treated with 500 ng/ml amphotericin B for 15 min and washed once with ice-cold water, and whole-cell extracts for immunoblotting were prepared as described above and subjected to immunoblotting as described for panel A. Striped columns indicate drug (AMB) treatment conditions.