Evan Udine, Mariely DeJesus-Hernandez, Shulan Tian, Sofia Pereira das Neves, Richard Crook, NiCole A. Finch, Matthew C. Baker, Cyril Pottier, Neill R. Graff-Radford, Bradley F. Boeve, Ronald C. Petersen, David S. Knopman, Keith A. Josephs, Björn Oskarsson, Sandro Da Mesquita, Leonard Petrucelli, Tania F. Gendron, Dennis W. Dickson, Rosa Rademakers, Marka van Blitterswijk
{"title":"Abundant transcriptomic alterations in the human cerebellum of patients with a C9orf72 repeat expansion","authors":"Evan Udine, Mariely DeJesus-Hernandez, Shulan Tian, Sofia Pereira das Neves, Richard Crook, NiCole A. Finch, Matthew C. Baker, Cyril Pottier, Neill R. Graff-Radford, Bradley F. Boeve, Ronald C. Petersen, David S. Knopman, Keith A. Josephs, Björn Oskarsson, Sandro Da Mesquita, Leonard Petrucelli, Tania F. Gendron, Dennis W. Dickson, Rosa Rademakers, Marka van Blitterswijk","doi":"10.1007/s00401-024-02720-2","DOIUrl":null,"url":null,"abstract":"<div><p>The most prominent genetic cause of both amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD) is a repeat expansion in the gene <i>C9orf72</i>. Importantly, the transcriptomic consequences of the <i>C9orf72</i> repeat expansion remain largely unclear. Here, we used short-read RNA sequencing (RNAseq) to profile the cerebellar transcriptome, detecting alterations in patients with a <i>C9orf72</i> repeat expansion. We focused on the cerebellum, since key <i>C9orf72</i>-related pathologies are abundant in this neuroanatomical region, yet TDP-43 pathology and neuronal loss are minimal. Consistent with previous work, we showed a reduction in the expression of the <i>C9orf72</i> gene and an elevation in homeobox genes, when comparing patients with the expansion to both patients without the <i>C9orf72</i> repeat expansion and control subjects. Interestingly, we identified more than 1000 alternative splicing events, including 4 in genes previously associated with ALS and/or FTLD. We also found an increase of cryptic splicing in <i>C9orf72</i> patients compared to patients without the expansion and controls. Furthermore, we demonstrated that the expression level of select RNA-binding proteins is associated with cryptic splice junction inclusion. Overall, this study explores the presence of widespread transcriptomic changes in the cerebellum, a region not confounded by severe neurodegeneration, in post-mortem tissue from <i>C9orf72</i> patients.</p></div>","PeriodicalId":7012,"journal":{"name":"Acta Neuropathologica","volume":null,"pages":null},"PeriodicalIF":9.3000,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00401-024-02720-2.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Neuropathologica","FirstCategoryId":"3","ListUrlMain":"https://link.springer.com/article/10.1007/s00401-024-02720-2","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CLINICAL NEUROLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The most prominent genetic cause of both amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD) is a repeat expansion in the gene C9orf72. Importantly, the transcriptomic consequences of the C9orf72 repeat expansion remain largely unclear. Here, we used short-read RNA sequencing (RNAseq) to profile the cerebellar transcriptome, detecting alterations in patients with a C9orf72 repeat expansion. We focused on the cerebellum, since key C9orf72-related pathologies are abundant in this neuroanatomical region, yet TDP-43 pathology and neuronal loss are minimal. Consistent with previous work, we showed a reduction in the expression of the C9orf72 gene and an elevation in homeobox genes, when comparing patients with the expansion to both patients without the C9orf72 repeat expansion and control subjects. Interestingly, we identified more than 1000 alternative splicing events, including 4 in genes previously associated with ALS and/or FTLD. We also found an increase of cryptic splicing in C9orf72 patients compared to patients without the expansion and controls. Furthermore, we demonstrated that the expression level of select RNA-binding proteins is associated with cryptic splice junction inclusion. Overall, this study explores the presence of widespread transcriptomic changes in the cerebellum, a region not confounded by severe neurodegeneration, in post-mortem tissue from C9orf72 patients.
期刊介绍:
Acta Neuropathologica publishes top-quality papers on the pathology of neurological diseases and experimental studies on molecular and cellular mechanisms using in vitro and in vivo models, ideally validated by analysis of human tissues. The journal accepts Original Papers, Review Articles, Case Reports, and Scientific Correspondence (Letters). Manuscripts must adhere to ethical standards, including review by appropriate ethics committees for human studies and compliance with principles of laboratory animal care for animal experiments. Failure to comply may result in rejection of the manuscript, and authors are responsible for ensuring accuracy and adherence to these requirements.