Neutrophil degranulation and extracellular ROS production are inactivated by Yersinia pseudotuberculosis YopE through a SKAP2 independent pathway.

Yersinia pseudotuberculosis YopE inhibits neutrophil degranulation and ROS production via a SKAP2-independent pathway, revealing distinct immune evasion mechanisms.

• Why it matters: Understanding how pathogens like Yptb suppress neutrophil responses is crucial for developing strategies to combat bacterial infections, as these immune defenses are vital for host protection.
• What they did: Using CRISPR/Cas9-engineered myeloid progenitor cells differentiated into neutrophils, the study examined the effects of Yptb's Yops on immune signaling pathways by infecting genetically modified neutrophils with bacteria expressing specific Yops.
• The result: YopE and YopH target separate signaling pathways to inhibit degranulation and ROS production, with YopE acting independently of SKAP2, providing insights into bacterial immune evasion and potential therapeutic targets.