Cited by 39Down syndrome and intellectual disability researchDementia and Cognitive Impairment ResearchAlzheimer's disease research and treatments

Cerebrospinal fluid profile of NPTX2 supports role of Alzheimer’s disease-related inhibitory circuit dysfunction in adults with Down syndrome

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Belbin, Olivia, Xiao, Mei-Fang, Xu, Desheng, Carmona-Iragui, Maria, Pegueroles, Jordi, Benejam, Bessy, Videla, Laura, Fernández, Susana +11 more·2020·Molecular Neurodegeneration

Abstract

Background: Alzheimer’s disease (AD) is the major cause of death in adults with Down syndrome (DS). There is an urgent need for objective markers of AD in the DS population to improve early diagnosis and monitor disease progression. NPTX2 has recently emerged as a promising cerebrospinal fluid (CSF) biomarker of Alzheimer-related inhibitory circuit dysfunction in sporadic AD patients. The objective of this study was to evaluate NPTX2 in the CSF of adults with DS and to explore the relationship of NPTX2 to CSF levels of the PV interneuron receptor, GluA4, and existing AD biomarkers (CSF and neuroimaging). Methods: This is a cross-sectional, retrospective study of adults with DS with asymptomatic AD (aDS, n = 49), prodromal AD (pDS, n = 18) and AD dementia (dDS, n = 27). Non-trisomic controls (n = 34) and patients with sporadic AD dementia (sAD, n = 40) were included for comparison. We compared group differences in CSF NPTX2 according to clinical diagnosis and degree of intellectual disability. We determined the relationship of CSF NPTX2 levels to age, cognitive performance (CAMCOG, free and cued selective reminding, semantic verbal fluency), CSF levels of a PV-interneuron marker (GluA4) and core AD biomarkers; CSF Aβ 1–42, CSF t-tau, cortical atrophy (magnetic resonance imaging) and glucose metabolism ([18 F]-fluorodeoxyglucose positron emission tomography). Results: Compared to controls, mean CSF NPTX2 levels were lower in DS at all AD stages; aDS (0.6-fold, adj.p < 0.0001), pDS (0.5-fold, adj.p < 0.0001) and dDS (0.3-fold, adj.p < 0.0001). This reduction was similar to that observed in sporadic AD (0.5-fold, adj.p < 0.0001). CSF NPTX2 levels were not associated with age (p = 0.6), intellectual disability (p = 0.7) or cognitive performance (all p > 0.07). Low CSF NPTX2 levels were associated with low GluA4 in all clinical groups; controls (r2 = 0.2, p = 0.003), adults with DS (r2 = 0.4, p < 0.0001) and sporadic AD (r2 = 0.4, p < 0.0001). In adults with DS, low CSF NPTX2 levels were associated with low CSF Aβ 1–42 (r2 > 0.3, p < 0.006), low CSF t-tau (r2 > 0.3, p < 0.001), increased cortical atrophy (p < 0.05) and reduced glucose metabolism (p < 0.05). Conclusions: Low levels of CSF NPTX2, a protein implicated in inhibitory circuit function, is common to sporadic and genetic forms of AD. CSF NPTX2 represents a promising CSF surrogate marker of early AD-related changes in adults with DS.

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  • CSF NPTX2 levels assessed by Western Blot, in-house ELISA and mass spectrometry were decreased in both sporadic and genetic forms of MCI and AD dementia in comparison with cognitive healthy controls.

    “CSF NPTX2 levels assessed by WB, in-house ELISA and mass spectrometry were decreased in both sporadic and genetic forms of MCI and AD dementia in comparison with cognitive healthy controls (Belbin et al. 2020; Galasko et al. 2019; Nilsson et al. 2021; Soldan et al. 2019; Xiao et al. 2017).”

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  1. [23]Esteba-Castillo S Dalmau-Bueno A Ribas-Vidal N Vila-Alsina M Novell-Alsina R Garcia-Alba J Adaptation and validation of CAMDEX-DS (Cambridge examination for mental disorders of older people with Down’s syndrome and others with intellectual disabilities) in Spanish population with intellectual disabilities Rev Neurol 2013 57 337 346 24081888

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Authors
Belbin, O., Xiao, M.-F., Xu, D., Carmona-Iragui, M., Pegueroles, J., Benejam, B., Videla, L., Fernández, S., Barroeta, I., Nuñez-Llaves, R., Montal, V., Vilaplana, E., Altuna, M., Clarimón, J., Alcolea, D., Blesa, R., Lleó, A., Worley, P. F., & Fortea, J.
Affiliations
  • Hospital de Sant Pau (ES)
  • Johns Hopkins University (US)
Corresponding author
Belbin, Olivia
Venue
Molecular Neurodegeneration
Published
2020-08-17
Volume
15
Issue
1
Pages
46-46
ISSN
1750-1326 (ISSN-L)
OpenAlex
W3055276839
Cited by
39
References
40
Citations by year
2026: 3 · 2025: 11 · 2024: 8 · 2023: 4 · 2022: 7 · 2021: 5 · 2020: 1
FWCI
3.19
Type
journal article
Language
en
Open access
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Dipòsit Digital de Documents de la UAB (Universitat Autònoma de Barcelona) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Instituto de Salud Carlos III (PI18/00327, PI17/01019, PI16/01825, PI17/01895, PI18/0335, CP18/00011)
  • Centro de investigación biomedica en red sobre enfermedades neurodegenerativas (Program 1, Alzheimer Disease)
  • National Institute on Aging (R35NS097966, R01AG056850-01A1, R21AG056974, R01AG061566)
  • Departament de Salut, Generalitat de Catalunya (SLT006/17/125, SLT002/16/00099, SLT006/17/00119)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
NPTX2, Down syndrome, Alzheimer's disease, cerebrospinal fluid biomarkers, parvalbumin interneurons, GluA4, amyloid-beta 42, tau protein, cortical atrophy, glucose metabolism, prodromal Alzheimer's disease, Alzheimer's dementia, intellectual disability, early detection of Alzheimer's disease
MeSH terms
Pentraxins, Adult, Alzheimer Disease, C-Reactive Protein, Cross-Sectional Studies, Down Syndrome, Female, Humans, Male, Middle Aged, Nerve Tissue Proteins, Retrospective Studies, Biomarkers

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