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Repurposing of tamoxifen ameliorates CLN3 and CLN7 disease phenotype

2021; Springer Nature; Volume: 13; Issue: 10 Linguagem: Inglês

10.15252/emmm.202013742

1757-4684

Chiara Soldati, Irene López-Fabuel, Luca G. Wanderlingh, Marina García‐Macia, Jlenia Monfregola, Alessandra Esposito, Gennaro Napolitano, Marta Guevara‐Ferrer, Anna Scotto Rosato, Einar Krogsaeter, Dominik Paquet, Christian Grimm, Sandro Montefusco, Thomas Braulke, Stephan Storch, Sara Mole, Maria Antonietta De Matteis, Andrea Ballabio, Júlio L. Sampaio, Tristan R. McKay, Ludger Johannes, Juan P. Bolaños, Diego L. Medina,

Autophagy in Disease and Therapy

Batten diseases (BDs) are a group of lysosomal storage disorders characterized by seizure, visual loss, and cognitive and motor deterioration. We discovered increased levels of globotriaosylceramide (Gb3) in cellular and murine models of CLN3 and CLN7 diseases and used fluorescent-conjugated bacterial toxins to label Gb3 to develop a cell-based high content imaging (HCI) screening assay for the repurposing of FDA-approved compounds able to reduce this accumulation within BD cells. We found that tamoxifen reduced the lysosomal accumulation of Gb3 in CLN3 and CLN7 cell models, including neuronal progenitor cells (NPCs) from CLN7 patient-derived induced pluripotent stem cells (iPSC). Here, tamoxifen exerts its action through a mechanism that involves activation of the transcription factor EB (TFEB), a master gene of lysosomal function and autophagy. In vivo administration of tamoxifen to the CLN7Δex2 mouse model reduced the accumulation of Gb3 and SCMAS, decreased neuroinflammation, and improved motor coordination. These data strongly suggest that tamoxifen may be a suitable drug to treat some types of Batten disease.