Cristin-resultat-ID: 2025960
Sist endret: 28. november 2022, 15:17
NVI-rapporteringsår: 2022
Vitenskapelig artikkel

Genetic Epidemiology of Amyotrophic lateral Sclerosis in Norway: A 2-Year Population-Based Study

  • Cathrine Goberg Olsen
  • Øyvind Løvold Busk
  • Tori Navestad Aanjesen
  • Karl Bjørnar Alstadhaug
  • Ingrid Kristine Bjørnå
  • Geir Julius Braathen
  • mfl.


ISSN 0251-5350
e-ISSN 1423-0208
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Publisert online: 2022
Trykket: 2022
Volum: 56
Hefte: 4
Sider: 271 - 282
Open Access


Scopus-ID: 2-s2.0-85137158939

Beskrivelse Beskrivelse


Genetic Epidemiology of Amyotrophic lateral Sclerosis in Norway: A 2-Year Population-Based Study


Background: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease that affects motor neurons. In Europe, disease-causing genetic variants have been identified in 40-70% of familial ALS patients and approximately in 5% of sporadic ALS patients. In Norway, the contribution of genetic variants to ALS has not yet been studied. In light of the potential development of personalized medicine, knowledge of genetic causes of ALS in a population is becoming increasingly important. The present study provides clinical and genetic data on familial and sporadic ALS patients in a Norwegian population-based cohort. Methods: Blood samples and clinical information from ALS patients were obtained at all 17 neurological departments throughout Norway during a 2-year period. Genetic analysis of the samples involved expansion analysis of C9orf72 and exome sequencing targeting 30 known ALS-linked genes. The variants were classified using genotype-phenotype correlations and bioinformatics tools. Results: A total of 279 ALS patients were included in the study. Of these, 11.5% had one or several family members affected with ALS, whereas 88.5% had no known family history of ALS. A genetic cause of ALS was identified in 31 individuals (11.1%), among which 18 (58.1%) were familial and 13 (41.9%) were sporadic. The most common genetic cause was the C9orf72 expansion (6.8%), which was identified in 8 familial and 11 sporadic ALS patients. Pathogenic or likely pathogenic variants of SOD1 and TBK1 were identified in 10 familial and 2 sporadic cases. C9orf72 expansions dominated in patients from the Northern and Central regions, whereas SOD1 variants dominated in patients from the South-Eastern region. Conclusion: In the present study, we identified several pathogenic gene variants in both familial and sporadic ALS patients. Restricting genetic analysis to only familial cases would miss more than 40 percent of those with a disease-causing genetic variant, indicating the need for genetic analysis in sporadic cases as well.


Cathrine Goberg Olsen

  • Tilknyttet:
    ved Klinikk for indremedisin og lab fag ved Universitetet i Oslo
  • Tilknyttet:
    ved Sykehuset Telemark HF

Øyvind Løvold Busk

  • Tilknyttet:
    ved Medisinsk serviceklinikk ved Sykehuset Telemark HF

Tori Navestad Aanjesen

  • Tilknyttet:
    ved Nevrologi og klinisk nevrofysiologi ved Akershus universitetssykehus HF

Karl Bjørnar Alstadhaug

  • Tilknyttet:
    ved Nordlandssykehuset HF

Ingrid Kristine Bjørnå

  • Tilknyttet:
    ved Drammen sykehus ved Vestre Viken HF
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