Poly(ADP-ribose) promotes toxicity of C9ORF72 arginine-rich dipeptide repeat proteins

Author:

Gao Junli1ORCID,Mewborne Quinlan T.1ORCID,Girdhar Amandeep2ORCID,Sheth Udit1ORCID,Coyne Alyssa N.34ORCID,Punathil Ritika1ORCID,Kang Bong Gu3ORCID,Dasovich Morgan56ORCID,Veire Austin1ORCID,DeJesus Hernandez Mariely1,Liu Shuaichen5,Shi Zheng7ORCID,Dafinca Ruxandra8ORCID,Fouquerel Elise2ORCID,Talbot Kevin8ORCID,Kam Tae-In3ORCID,Zhang Yong-Jie1ORCID,Dickson Dennis1ORCID,Petrucelli Leonard19ORCID,van Blitterswijk Marka1ORCID,Guo Lin2ORCID,Dawson Ted M.31011ORCID,Dawson Valina L.31011ORCID,Leung Anthony K. L.5121314ORCID,Lloyd Thomas E.311ORCID,Gendron Tania F.19ORCID,Rothstein Jeffrey D.3411ORCID,Zhang Ke1915ORCID

Affiliation:

1. Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA.

2. Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.

3. Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA.

4. Brain Science Institute, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA.

5. Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA.

6. Department of Chemistry, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA.

7. Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.

8. Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK.

9. Neuroscience Graduate Program, Mayo Clinic Graduate School of Biomedical Sciences, Jacksonville, FL 32224, USA.

10. Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA.

11. Department of Neuroscience, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA.

12. McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.

13. Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.

14. Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.

15. Institute of Neurological Diseases, Shenzhen Bay Laboratory, Shenzhen, Guangdong, 518132, China.

Abstract

Arginine-rich dipeptide repeat proteins (R-DPRs), abnormal translational products of a GGGGCC hexanucleotide repeat expansion in C9ORF72 , play a critical role in C9ORF72 -related amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), the most common genetic form of the disorders (c9ALS/FTD). R-DPRs form liquid condensates in vitro, induce stress granule formation in cultured cells, aggregate, and sometimes coaggregate with TDP-43 in postmortem tissue from patients with c9ALS/FTD. However, how these processes are regulated is unclear. Here, we show that loss of poly(ADP-ribose) (PAR) suppresses neurodegeneration in c9ALS/FTD fly models and neurons differentiated from patient-derived induced pluripotent stem cells. Mechanistically, PAR induces R-DPR condensation and promotes R-DPR–induced stress granule formation and TDP-43 aggregation. Moreover, PAR associates with insoluble R-DPR and TDP-43 in postmortem tissue from patients. These findings identified PAR as a promoter of R-DPR toxicity and thus a potential target for treating c9ALS/FTD.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

General Medicine

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