Genome-wide association study meta-analysis of neurofilament light (NfL) levels in blood reveals novel loci related to neurodegeneration

Commun Biol. 2024 Sep 9;7(1):1103. doi: 10.1038/s42003-024-06804-3.

Abstract

Neurofilament light chain (NfL) levels in circulation have been established as a sensitive biomarker of neuro-axonal damage across a range of neurodegenerative disorders. Elucidation of the genetic architecture of blood NfL levels could provide new insights into molecular mechanisms underlying neurodegenerative disorders. In this meta-analysis of genome-wide association studies (GWAS) of blood NfL levels from eleven cohorts of European ancestry, we identify two genome-wide significant loci at 16p12 (UMOD) and 17q24 (SLC39A11). We observe association of three loci at 1q43 (FMN2), 12q14, and 12q21 with blood NfL levels in the meta-analysis of African-American ancestry. In the trans-ethnic meta-analysis, we identify three additional genome-wide significant loci at 1p32 (FGGY), 6q14 (TBX18), and 4q21. In the post-GWAS analyses, we observe the association of higher NfL polygenic risk score with increased plasma levels of total-tau, Aβ-40, Aβ-42, and higher incidence of Alzheimer's disease in the Rotterdam Study. Furthermore, Mendelian randomization analysis results suggest that a lower kidney function could cause higher blood NfL levels. This study uncovers multiple genetic loci of blood NfL levels, highlighting the genes related to molecular mechanism of neurodegeneration.

Publication types

  • Meta-Analysis

MeSH terms

  • Alzheimer Disease / blood
  • Alzheimer Disease / genetics
  • Biomarkers / blood
  • Female
  • Genetic Loci
  • Genetic Predisposition to Disease
  • Genome-Wide Association Study*
  • Humans
  • Male
  • Neurodegenerative Diseases* / blood
  • Neurodegenerative Diseases* / genetics
  • Neurofilament Proteins* / blood
  • Neurofilament Proteins* / genetics
  • Polymorphism, Single Nucleotide

Substances

  • Neurofilament Proteins
  • neurofilament protein L
  • Biomarkers

Grants and funding