Communications Biology (Sep 2024)

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

  • Shahzad Ahmad,
  • Mohammad Aslam Imtiaz,
  • Aniket Mishra,
  • Ruiqi Wang,
  • Marisol Herrera-Rivero,
  • Joshua C. Bis,
  • Myriam Fornage,
  • Gennady Roshchupkin,
  • Edith Hofer,
  • Mark Logue,
  • W. T. Longstreth,
  • Rui Xia,
  • Vincent Bouteloup,
  • Thomas Mosley,
  • Lenore J. Launer,
  • Michael Khalil,
  • Jens Kuhle,
  • Robert A. Rissman,
  • Genevieve Chene,
  • Carole Dufouil,
  • Luc Djoussé,
  • Michael J. Lyons,
  • Kenneth J. Mukamal,
  • William S. Kremen,
  • Carol E. Franz,
  • Reinhold Schmidt,
  • Stephanie Debette,
  • Monique M. B. Breteler,
  • Klaus Berger,
  • Qiong Yang,
  • Sudha Seshadri,
  • N. Ahmad Aziz,
  • Mohsen Ghanbari,
  • M. Arfan Ikram

DOI
https://doi.org/10.1038/s42003-024-06804-3
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 12

Abstract

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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.