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Plasma Amyloid Beta 1-42 and DNA Methylation Pattern Predict Accelerated Aging in Young Subjects with Down Syndrome

NeuroMolecular Medicine volume 18, pages 593–601 (2016)Cite this article

Abstract

Gene methylation is an age-related dynamic process that influences diseases. Premature aging and disturbed methylation are components of Down syndrome (DS). We studied blood biomarkers and DNA methylation (DNAm) of three CpG sites (ASPA, ITGA2B, and PDE4C) in 60 elderly subjects (mean age = 68 years), 31 subjects with DS (12.1 years) and 44 controls (12.8 years). Plasma concentrations of amyloid beta (Aβ) 1-42 and biomarkers of methylation were measured in the young groups. Subjects with DS had significantly higher concentrations of plasma S-adenosylhomocysteine (SAH) and Aβ and reduced S-adenosylmethionine/SAH ratio compared with the controls. Methylations (%) of ASPA and ITGA2B were lower in DS [mean difference; 95 % confidence intervals = −2.2 (−4.5, 0.1) for ASPA and −5.0 (−8.9, −1.1) for ITGA2B]. Methylation of PDE4C did not differ between the groups. The sum of z-scores for methylations of ASPA and ITGA2B, both of which declined with age, was significantly lower in DS [−1.01 (−1.93, −0.20), p = 0.017]. Subjects with DS were found to be 3.1 (1.5–4.6) years older than their predicted age based on a regression model of the controls. Elevated SAH levels predicted lower DNAm of ASPA and ITGA2B in stepwise regression analysis. Therefore, methylation of three CpGs combined with plasma Aβ has shown a 3-year accelerated aging in subjects with DS at the age of 12 years. Disorders in the methylation cycle explained pathoepigenetic modifications in subjects with DS. The influence of modifications in the methylation cycle on epigenetic markers of aging warrants further investigations.

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Fig. 1

Abbreviations

Aβ:

Amyloid beta

APP:

Amyloid precursor protein

DNAm:

DNA methylation

DS:

Down syndrome

Hcy:

Homocysteine

SAH:

S-adenosylhomocysteine

SAM:

S-adenosylmethionine

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Acknowledgments

We acknowledge the engagements of Kathrin Hartmuth and Nicole Klein in patient’s recruitments.

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Authors and Affiliations

  1. Department of Clinical Chemistry and Laboratory Medicine, Saarland University Hospital, Building 57, 66421, Homburg/Saar, Germany

    Rima Obeid, Ulrich Hübner, Marion Bodis & Juergen Geisel

  2. Aarhus Institute of Advanced Studies, University of Aarhus, Høegh-Guldbergs Gade 6B, Building 1632, 8000, Aarhus C, Denmark

    Rima Obeid

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  1. Rima Obeid
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  2. Ulrich Hübner
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  3. Marion Bodis
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  4. Juergen Geisel
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Correspondence to Rima Obeid.

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Obeid, R., Hübner, U., Bodis, M. et al. Plasma Amyloid Beta 1-42 and DNA Methylation Pattern Predict Accelerated Aging in Young Subjects with Down Syndrome. Neuromol Med 18, 593–601 (2016). https://doi.org/10.1007/s12017-016-8413-y

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  • DOI: https://doi.org/10.1007/s12017-016-8413-y

Keywords

  • Trisomy 21
  • Amyloid beta
  • DNA methylation
  • Aging
  • Epigenomics