Candida spp. suppress neutrophil reactive nitrogen species to evade killing.

Candida spp. suppress neutrophil reactive nitrogen species below basal levels during infection, aiding fungal evasion and survival in host organisms.

• Why it matters: Understanding how Candida evades neutrophil defenses is crucial because it can lead to persistent, life-threatening infections, especially in immunocompromised individuals, and current knowledge is limited mainly to macrophage responses.
• What they did: The study used a zebrafish model and human neutrophils to show that Candida downregulates RNS production by competing for L-arginine via fungal and host arginases, and demonstrated that boosting RNS through Hif-1α stabilization enhances host survival and fungal clearance.
• The result: Restoring neutrophil RNS response improves infection outcomes and, when combined with antifungal drugs, increases survival and clearance, highlighting potential host-directed therapies against Candida infections.