Mechanism of STMN2 cryptic splice-polyadenylation and its correction for TDP-43 proteinopathies

Author:

Baughn Michael W.12ORCID,Melamed Ze’ev123ORCID,López-Erauskin Jone12,Beccari Melinda S.12ORCID,Ling Karen4ORCID,Zuberi Aamir5ORCID,Presa Maximilliano5ORCID,Gonzalo-Gil Elena5,Maimon Roy12,Vazquez-Sanchez Sonia12ORCID,Chaturvedi Som2,Bravo-Hernández Mariana2ORCID,Taupin Vanessa2,Moore Stephen2,Artates Jonathan W.12,Acks Eitan12,Ndayambaje I. Sandra6ORCID,Agra de Almeida Quadros Ana R.6ORCID,Jafar-nejad Paayman4ORCID,Rigo Frank4,Bennett C. Frank4ORCID,Lutz Cathleen5,Lagier-Tourenne Clotilde67ORCID,Cleveland Don W.12ORCID

Affiliation:

1. Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA 92093, USA.

2. Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA 92093, USA.

3. Department of Medical Neurobiology, Faculty of Medicine, The Hebrew University of Jerusalem, Israel.

4. Ionis Pharmaceuticals, Carlsbad, CA 92010, USA.

5. Rare Disease Translational Center, The Jackson Laboratory, Bar Harbor, ME 04609, USA.

6. Department of Neurology, Sean M. Healey & AMG Center for ALS, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.

7. Broad Institute of Harvard University and MIT, Cambridge, MA 02142, USA.

Abstract

Loss of nuclear TDP-43 is a hallmark of neurodegeneration in TDP-43 proteinopathies, including amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). TDP-43 mislocalization results in cryptic splicing and polyadenylation of pre–messenger RNAs (pre-mRNAs) encoding stathmin-2 (also known as SCG10), a protein that is required for axonal regeneration. We found that TDP-43 binding to a GU-rich region sterically blocked recognition of the cryptic 3′ splice site in STMN2 pre-mRNA. Targeting dCasRx or antisense oligonucleotides (ASOs) suppressed cryptic splicing, which restored axonal regeneration and stathmin-2–dependent lysosome trafficking in TDP-43–deficient human motor neurons. In mice that were gene-edited to contain human STMN2 cryptic splice-polyadenylation sequences, ASO injection into cerebral spinal fluid successfully corrected Stmn2 pre-mRNA misprocessing and restored stathmin-2 expression levels independently of TDP-43 binding.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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