Expression of ALS-PFN1 impairs vesicular degradation in iPSC-derived microglia

Authors
Funes, Salome, Jung, Jonathan, Gadd, Del Hayden, Mosqueda, Michelle, Zhong, Jianjun, Shankaracharya, Unger, Matthew, Stallworth, Karly, Cameron, Debra, Rotunno, Melissa S., Dawes, Pepper, Fowler-Magaw, Megan, Keagle, Pamela J., McDonough, Justin A., Boopathy, Sivakumar, Sena-Esteves, Miguel, Nickerson, Jeffrey A., Lutz, Cathleen, Skarnes, William C., Lim, Elaine T., Schafer, Dorothy P., Massi, Francesca, Landers, John E., Bosco, Daryl A.


Lab

Journal
Nature Communications

Abstract
Microglia play a pivotal role in neurodegenerative disease pathogenesis, but the mechanisms underlying microglia dysfunction and toxicity remain to be elucidated. To investigate the effect of neurodegenerative disease-linked genes on the intrinsic properties of microglia, we studied microglia-like cells derived from human induced pluripotent stem cells (iPSCs), termed iMGs, harboring mutations in profilin-1 (PFN1) that are causative for amyotrophic lateral sclerosis (ALS). ALS-PFN1 iMGs exhibited evidence of lipid dysmetabolism, autophagy dysregulation and deficient phagocytosis, a canonical microglia function. Mutant PFN1 also displayed enhanced binding affinity for PI3P, a critical signaling molecule involved in autophagic and endocytic processing. Our cumulative data implicate a gain-of-toxic function for mutant PFN1 within the autophagic and endo-lysosomal pathways, as administration of rapamycin rescued phagocytic dysfunction in ALS-PFN1 iMGs. These outcomes demonstrate the utility of iMGs for neurodegenerative disease research and implicate microglial vesicular degradation pathways in the pathogenesis of these disorders. Mutations in profilin 1 (PFN1), which modulates actin dynamics, are associated with ALS. Here the authors show that expression of ALS-PFN1 is sufficient to induce deficits in human microglia-like cells, including impaired phagocytosis and lipid metabolism, and that gain-of-function interactions between ALS-PFN1 and PI3P may underlie these deficits.

Keywords/Topics
expression;impairs;vesicular;degradation;ipsc-derived;microglia;pivotal;neurodegenerative;disease;pathogenesis

BIOSEB Instruments Used:
Grip strength test (BIO-GS4)

Source :

https://www.nature.com/articles/s41467-024-46695-w

Produits associés

Test d'agrippement

DEMANDE DE PUBLICATION

Merci de votre intérêt pour notre gamme de produits et de votre demande pour cette publication qui vous sera envoyée si l'équipe de recherche et la revue le permettent. Notre équipe commerciale vous contactera dans les plus brefs délais.