Aminopyridazines attenuate hippocampus-dependent behavioral deficits induced by human beta-amyloid in a murine model of neuroinflammation.
The importance of glial cell-driven neuroinflammation in the pathogenesis and progression of Alzheimer's disease (AD) led us to initiate a drug discovery effort targeting the neuroinflammatory cycle that is characteristic of AD. We used our synthetic chemistry platform focused on bioavailable aminopyridazines as a new chemotype for AD drug discovery to develop novel, selective suppressors of key inflammatory and oxidative pathways in glia. We found that MW01-070C, an aminopyridazine that works via mechanisms distinct from NSAIDs and p38 MAPK inhibitors, attenuates beta-amyloid (Abeta)-induced neuroinflammation and neuronal dysfunction in a dose-dependent manner, and prevents Abeta-induced behavioral impairment. In vivo data were obtained with a murine model that uses intraventricular infusion of human Abeta1-42 peptide and replicates many of the hallmarks of AD pathology, including neuroinflammation, neuronal and synaptic degeneration, and amyloid deposition. The quantifiable endpoint pathology is robust, reproducible, and rapid in onset. Our results provide a proof of concept that targeting neuroinflammation with aminopyridazines is a viable AD drug discovery approach that has the potential to modulate disease progression and document the utility of this mouse model for preclinical screening of compounds targeting AD-relevant neuroinflammation and neuronal death.
Drug Discovery Program, Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Jeffrey M
JM
Craft
Linda J
LJ
Van Eldik
Magdalena
M
Zasadzki
Wenhui
W
Hu
D Martin
DM
Watterson
D000544:Alzheimer Disease / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D016229:Amyloid beta-Peptides / Q000037:antagonists & inhibitors* / Q000633:toxicity; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology* / Q000627:therapeutic use; D001522:Behavior, Animal / Q000187:drug effects / Q000502:physiology; D003072:Cognition Disorders / Q000139:chemically induced / Q000188:drug therapy / Q000378:metabolism; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D004660:Encephalitis / Q000139:chemically induced / Q000188:drug therapy* / Q000378:metabolism; D005260:Female; D006624:Hippocampus / Q000187:drug effects* / Q000378:metabolism / Q000503:physiopathology; D006801:Humans; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology; D051379:Mice; D008810:Mice, Inbred C57BL; D009410:Nerve Degeneration / Q000139:chemically induced / Q000188:drug therapy / Q000378:metabolism; D011724:Pyridazines / Q000494:pharmacology* / Q000627:therapeutic use; D016896:Treatment Outcome
D016229:Amyloid beta-Peptides; D000893:Anti-Inflammatory Agents; C494131:MW01 070C; D011724:Pyridazines