Nature Communications (Apr 2024)

Plasma brain-derived tau is an amyloid-associated neurodegeneration biomarker in Alzheimer’s disease

  • Fernando Gonzalez-Ortiz,
  • Bjørn-Eivind Kirsebom,
  • José Contador,
  • Jordan E. Tanley,
  • Per Selnes,
  • Berglind Gísladóttir,
  • Lene Pålhaugen,
  • Mathilde Suhr Hemminghyth,
  • Jonas Jarholm,
  • Ragnhild Skogseth,
  • Geir Bråthen,
  • Gøril Grøndtvedt,
  • Atle Bjørnerud,
  • Sandra Tecelao,
  • Knut Waterloo,
  • Dag Aarsland,
  • Aida Fernández-Lebrero,
  • Greta García-Escobar,
  • Irene Navalpotro-Gómez,
  • Michael Turton,
  • Agnes Hesthamar,
  • Przemyslaw R. Kac,
  • Johanna Nilsson,
  • Jose Luchsinger,
  • Kathleen M. Hayden,
  • Peter Harrison,
  • Albert Puig-Pijoan,
  • Henrik Zetterberg,
  • Timothy M. Hughes,
  • Marc Suárez-Calvet,
  • Thomas K. Karikari,
  • Tormod Fladby,
  • Kaj Blennow

DOI
https://doi.org/10.1038/s41467-024-47286-5
Journal volume & issue
Vol. 15, no. 1
pp. 1 – 13

Abstract

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Abstract Staging amyloid-beta (Aβ) pathophysiology according to the intensity of neurodegeneration could identify individuals at risk for cognitive decline in Alzheimer’s disease (AD). In blood, phosphorylated tau (p-tau) associates with Aβ pathophysiology but an AD-type neurodegeneration biomarker has been lacking. In this multicenter study (n = 1076), we show that brain-derived tau (BD-tau) in blood increases according to concomitant Aβ (“A”) and neurodegeneration (“N”) abnormalities (determined using cerebrospinal fluid biomarkers); We used blood-based A/N biomarkers to profile the participants in this study; individuals with blood-based p-tau+/BD-tau+ profiles had the fastest cognitive decline and atrophy rates, irrespective of the baseline cognitive status. Furthermore, BD-tau showed no or much weaker correlations with age, renal function, other comorbidities/risk factors and self-identified race/ethnicity, compared with other blood biomarkers. Here we show that blood-based BD-tau is a biomarker for identifying Aβ-positive individuals at risk of short-term cognitive decline and atrophy, with implications for clinical trials and implementation of anti-Aβ therapies.