Cell environment shapes TDP-43 function with implications in neuronal and muscle disease

NYGC ALS Consortium, Urša Šušnjar, Neva Škrabar, Anna Leigh Brown, Yasmine Abbassi, Hemali Phatnani, Andrea Cortese, Cristina Cereda, Enrico Bugiardini, Rosanna Cardani, Giovanni Meola, Michela Ripolone, Maurizio Moggio, Maurizio Romano, Maria Secrier, Pietro Fratta, Emanuele Buratti

Research output: Contribution to journalArticlepeer-review

Abstract

TDP-43 (TAR DNA-binding protein 43) aggregation and redistribution are recognised as a hallmark of amyotrophic lateral sclerosis and frontotemporal dementia. As TDP-43 inclusions have recently been described in the muscle of inclusion body myositis patients, this highlights the need to understand the role of TDP-43 beyond the central nervous system. Using RNA-seq, we directly compare TDP-43-mediated RNA processing in muscle (C2C12) and neuronal (NSC34) mouse cells. TDP-43 displays a cell-type-characteristic behaviour targeting unique transcripts in each cell-type, which is due to characteristic expression of RNA-binding proteins, that influence TDP-43's performance and define cell-type specific splicing. Among splicing events commonly dysregulated in both cell lines, we identify some that are TDP-43-dependent also in human cells. Inclusion levels of these alternative exons are altered in tissues of patients suffering from FTLD and IBM. We therefore propose that TDP-43 dysfunction contributes to disease development either in a common or a tissue-specific manner.

Original languageEnglish
Pages (from-to)314
Number of pages1
JournalCommunications Biology
Volume5
Issue number1
DOIs
Publication statusPublished - Apr 5 2022

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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