Targeted degradation of pathologic tau aggregates via AUTOTAC ameliorates tauopathy
Lee, J.; Kim, S. B.; Kim, H. Y.; Lee, G. E.; Lee, D. W.; Jung, E. H.; Lee, J. S.; Cho, E. H.; Park, H.-B.; Park, D.-h.; Noh, J. E.; Cha, H. S.; Oh, H. J.-y.; Lee, S. H.; Sterbenc, N.; Choi, C. Y.; Lee, M. J.; Chi, H. M.; Suh, Y. H.; Lee, K. J.; Han, D.; Sung, K. W.; Pavlin, D.; Kim, S. T.; Ji, C. H.; Pipan, M. Z.; Kwon, Y. T.
Show abstract
The pathogenesis of tauopathies including Alzheimers disease (AD) and progressive supranuclear palsy (PSP) involves the misfolding and aggregation of tau. Here, we employed AUTOTAC to induce the lysosomal degradation of intraneuronal tau aggregates. ATB2005A is a 734-Da chimera that simultaneously binds {beta}-sheet-rich tau aggregates and the autophagic receptor p62/SQSTM1, leading to autophagosomal sequestration and lysosomal co-degradation. In mouse models of tauopathies, orally administered ATB2005A lowered intraneuronal tau aggregates and exerted the therapeutic efficacy in neuroinflammation as well as cognition, behavior, and muscle movements. A Phase 2 clinical trial (U34401-4/2023/14) with companion dogs carrying canine cognitive dysfunction (CCD) demonstrated the efficacy of ATB2005A, as a veterinary medicine, to reverse the disease progression. ATB2005A is under Phase 1 clinical trial with human participants in Korea (202300697). These results validate AUTOTAC as a versatile platform for developing therapeutics to eradicate toxic protein aggregates in a wide range of proteinopathies.
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