Early infiltration of ischemia-conditioned Tregs attenuates BBB damage via suppressing neutrophil extracellular traps in ischemic stroke.

Early infiltration of ischemia-conditioned Tregs at day 5 post-MCAO reduces BBB damage by suppressing neutrophil extracellular traps in ischemic stroke.

• Why it matters: Understanding how to modulate immune responses during the early phase of stroke could improve neuroprotection and outcomes, addressing a gap in knowledge about Treg infiltration timing and function.
• What they did: Researchers transferred ischemia-conditioned Tregs (ICTregs) with enhanced adhesion into mice after MCAO, observing early infiltration, altered brain cellular composition, and reduced NETs and BBB damage, with mechanistic insights into integrin α4, Annexin A1, and Ikzf2.
• The result: Findings suggest that engineered ICTregs can be targeted to improve early neuroprotection in ischemic stroke by suppressing damaging neutrophil activity, offering potential strategies for immune ecosystem optimization.