IL6 and Cognitive impairment: Treatment with fludarabine effectively suppressed STAT1 expression and attenuated the production of pro-inflammatory cytokines, including TNF-α, IL-6, and IL-1β.<h4>Conclusion</h4>This study provides the first evidence that elevated microglial H3K18cr contributes to AD-related cognitive impairment by promoting STAT1 expression and subsequent neuroinflammation.