Targeting Aβ with Anti-inflammatory CAR-microglia for the Treatment of Alzheimer’s Disease
Overview
This study presents a novel anti-inflammatory CAR-microglia (CAR-Mic) approach for enhancing amyloid-β (Aβ) clearance in Alzheimer's disease (AD). The AXL-CAR construct demonstrated improved Aβ engulfment and reduced proinflammatory cytokine release in an AD mouse model, indicating its potential as a therapeutic strategy.
Background
Alzheimer’s disease is marked by the accumulation of amyloid-β plaques and chronic neuroinflammation, leading to neuronal loss and cognitive decline. Current monoclonal antibody therapies targeting Aβ have shown limited efficacy due to inadequate Aβ clearance and associated neuroinflammatory responses, necessitating innovative therapeutic strategies.
Data Highlights
The study reports that AXL-CAR-iMGLs exhibited enhanced Aβ clearance in an AD mouse model without severe adverse effects, demonstrating a significant reduction in Aβ plaque burden.
Key Findings
Monoclonal antibodies targeting Aβ have limited therapeutic efficacy due to insufficient Aβ clearance and neuroinflammatory responses.
Transplantation of exogenous microglia or macrophages has shown promise in reducing amyloid burden in AD models.
Engineering microglia with chimeric antigen receptors (CARs) can enhance Aβ phagocytosis and reduce inflammation.
The TAM receptor family (TYRO3, AXL, MERTK) plays a critical role in regulating efferocytosis and immune homeostasis in the context of AD.
AXL-CAR demonstrated superior performance in Aβ clearance compared to other constructs tested.
CAR-iMGLs represent a potential cell therapy model for AD and other neurodegenerative disorders characterized by chronic neuroinflammation.
Clinical Implications
The development of AXL-CAR-iMGLs may provide a new therapeutic avenue for enhancing Aβ clearance in Alzheimer's disease while minimizing neuroinflammation.
Conclusion
The findings support the potential of TAM receptor-based CAR-iMGLs as a strategy for treating Alzheimer's disease. Further research is warranted to evaluate their efficacy and safety.
