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1.	Ferrari-Souza, J. P., et al. (author) Astrocyte biomarker signatures of amyloid-beta and tau pathologies in Alzheimer's disease 2022 In: Molecular Psychiatry. - : Springer Science and Business Media LLC. - 1359-4184 .- 1476-5578. ; 27:11, s. 4781-4789 Journal article (peer-reviewed)abstract Astrocytes can adopt multiple molecular phenotypes in the brain of Alzheimer's disease (AD) patients. Here, we studied the associations of cerebrospinal fluid (CSF) glial fibrillary acidic protein (GFAP) and chitinase-3-like protein 1 (YKL-40) levels with brain amyloid-beta (A beta) and tau pathologies. We assessed 121 individuals across the aging and AD clinical spectrum with positron emission tomography (PET) brain imaging for A beta ([F-18]AZD4694) and tau ([F-18]MK-6240), as well as CSF GFAP and YKL-40 measures. We observed that higher CSF GFAP levels were associated with elevated A beta-PET but not tau-PET load. By contrast, higher CSF YKL-40 levels were associated with elevated tau-PET but not A beta-PET burden. Structural equation modeling revealed that CSF GFAP and YKL-40 mediate the effects of A beta and tau, respectively, on hippocampal atrophy, which was further associated with cognitive impairment. Our results suggest the existence of distinct astrocyte biomarker signatures in response to brain A beta and tau accumulation, which may contribute to our understanding of the complex link between reactive astrogliosis heterogeneity and AD progression.

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Type of publication: journal article (1)

Type of content: peer-reviewed (1)

Author/Editor: Blennow, Kaj, 1958 (1); Zetterberg, Henrik, ... (1); Stevenson, J (1); Ashton, Nicholas J. (1); Karikari, Thomas (1); Gauthier, S (1); show more...; Lessa Benedet, André ... (1); Brum, Wagner S. (1); Therriault, J. (1); Chamoun, M. (1); Zimmer, E. R. (1); Rosa-Neto, P. (1); Bellaver, B (1); Ferreira, P. C. L. (1); Ferrari-Souza, J. P. (1); Leffa, D. T. (1); Lussier, F. Z. (1); Tissot, C. (1); Servaes, S. (1); Rahmouni, N. (1); Tudorascu, D. L. (1); Villemagne, V. L. (1); Klunk, W. E. (1); Cohen, A. D. (1); Pascoal, T. A. (1); Wang, Y. T. (1); Bezgin, G. (1); Kang, M. S. (1); Pallen, V. (1); Poltronetti, N. M. (1); Souza, D. O. (1); De Bastiani, M. A. (1); Rocha, A. (1); show less...

University: University of Gothenburg (1)

Language: English (1)

Research subject (UKÄ/SCB): Medical and Health Sciences (1)

Year: 2022 (1)

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