Wnt signaling rescues amyloid beta induced stem cell loss

Abstract

Previously, we established an optogenetic model to induce Amyloid-{beta} intracellular oligomerization to model distinct disease etiologies (LO_SCPLOWIMC_SCPLOW et al. 2020). Here we examine the effect of Wnt signaling on Amyloid in this model. We observe that Wnt activation rescues the detrimental effects of Amyloid expression and oligomerization. We analyze the gene expression changes downstream of Wnt that contribute to this rescue and find changes in aging related genes, protein misfolding, metabolism and inflammation. We propose that Wnt expression reduces inflammation through repression of Toll activating factors and confirm that chronic Toll activation reduces lifespan. We propose that the protective effect observed for Lithium treatment functions at least in part through Wnt activation and inhibition of inflammation.