M6A reduction relieves FUS-associated ALS granules

Gaia Timoteo, Andrea Giuliani, Adriano Setti, Martina C. Biagi, Michela Lisi, Tiziana Santini, Alessia Grandioso, Davide Mariani, Francesco Castagnetti, Eleonora Perego, Sabrina Zappone, Serena Lattante, Mario Sabatelli, Dante Rotili, Giuseppe Vicidomini and Irene Bozzoni ()
Additional contact information
Gaia Timoteo: Sapienza University of Rome
Andrea Giuliani: Sapienza University of Rome
Adriano Setti: Sapienza University of Rome
Martina C. Biagi: Fondazione Istituto Italiano di Tecnologia (IIT)
Michela Lisi: Sapienza University of Rome
Tiziana Santini: Sapienza University of Rome
Alessia Grandioso: Sapienza University of Rome
Davide Mariani: Center for Human Technologies@Istituto Italiano di Tecnologia (IIT)
Francesco Castagnetti: Center for Human Technologies@Istituto Italiano di Tecnologia (IIT)
Eleonora Perego: Center for Human Technologies@Istituto Italiano di Tecnologia (IIT)
Sabrina Zappone: Center for Human Technologies@Istituto Italiano di Tecnologia (IIT)
Serena Lattante: Università Cattolica del Sacro Cuore
Mario Sabatelli: Università Cattolica del Sacro Cuore
Dante Rotili: Sapienza University of Rome
Giuseppe Vicidomini: Center for Human Technologies@Istituto Italiano di Tecnologia (IIT)
Irene Bozzoni: Sapienza University of Rome

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease due to gradual motoneurons (MN) degeneration. Among the processes associated to ALS pathogenesis, there is the formation of cytoplasmic inclusions produced by aggregation of mutant proteins, among which the RNA binding protein FUS. Here we show that, in neuronal cells and in iPSC-derived MN expressing mutant FUS, such inclusions are significantly reduced in number and dissolve faster when the RNA m6A content is diminished. Interestingly, stress granules formed in ALS conditions showed a distinctive transcriptome with respect to control cells, which reverted to similar to control after m6A downregulation. Notably, cells expressing mutant FUS were characterized by higher m6A levels suggesting a possible link between m6A homeostasis and pathological aggregates. Finally, we show that FUS inclusions are reduced also in patient-derived fibroblasts treated with STM-2457, an inhibitor of METTL3 activity, paving the way for its possible use for counteracting aggregate formation in ALS.

Date: 2024
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DOI: 10.1038/s41467-024-49416-5

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