Evidence map›Paper›PMID 34439728›Full record

ArticleBrain sciences2021

Acute Regression in Down Syndrome.

Benjamin Handen, Isabel Clare, Charles Laymon, Melissa Petersen, Shahid Zaman, Sid O'Bryant, Davneet Minhas, Dana Tudorascu, Stephanie Brown, Bradley Christian

Abstract read
In one paragraph

Article in Brain sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Blood-based biomarkers for Alzheimer's disease in Down syndrome: A systematic review and meta-analysis.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Pooled it
  2. Symptoms and age of prodromal Alzheimer's disease in Down syndrome: a systematic review and meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Pooled it
  3. Article
  4. Feasibility and potential diagnostic value of [Frontiers in neuroscience · 2024
    Article
  5. Cognitive outcome measures for tracking Alzheimer's disease in Down syndrome.International review of research in developmental disabilities · 2022
    Article
  6. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Benjamin HandenDepartment of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Isabel ClareDepartment of Psychiatry, University of Cambridge, Cambridge CB2 1TN, UK.ORCID 0000-0002-5385-008X
Charles LaymonDepartment of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Melissa PetersenDepartment of Family Medicine, University of North Texas Health Science Center, Fort Worth, TX 76107, USA.
Shahid ZamanDepartment of Psychiatry, University of Cambridge, Cambridge CB2 1TN, UK.
Sid O'BryantDepartment of Family Medicine, University of North Texas Health Science Center, Fort Worth, TX 76107, USA.
Davneet MinhasDepartment of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Dana TudorascuDepartment of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Stephanie BrownDepartment of Psychiatry, University of Cambridge, Cambridge CB2 1TN, UK.
Bradley ChristianDepartments of Medical Physics and Psychiatry, University of Wisconsin, Madison, WI 53706, USA.

Funding

National Centralized Repository for Alzheimer's Disease and Related Dementias (NCRAD)U24AG021886 · NIA · INDIANA UNIV-PURDUE UNIV AT INDIANAPOLIS · PI TATIANA M. FOROUD · 2002 to 2026
$119.8M
Project 3: Biomarkers for DS Clinical TrialsU19AG068054 · NIA · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI CHRISTIAN, BRADLEY T, HANDEN, BENJAMIN L · 2020 to 2025
$103.7M
NiAD Supplement WashU Start UpU01AG051406 · NIA · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI HANDEN, BENJAMIN L, LAYMON, CHARLES · 2015 to 2019
$21.3M
NIA NICHD U19AG068054NIA NIH HHS U01 AG051406NIA NIH HHS U01AG051406NIA NIH HHS U19 AG068054NIA NIH HHS U24 AG021886
6 · The paper itself

Abstract

backgroundAcute regression has been reported in some individuals with Down syndrome (DS), typically occurring between the teenage years and mid to late 20s. Characterized by sudden, and often unexplained, reductions in language skills, functional living skills and reduced psychomotor activity, some individuals have been incorrectly diagnosed with Alzheimer's disease (AD).

methodsThis paper compares five individuals with DS who previously experienced acute regression with a matched group of 15 unaffected individuals with DS using a set of AD biomarkers.

resultsWhile the sample was too small to conduct statistical analyses, findings suggest there are possible meaningful differences between the groups on proteomics biomarkers (e.g., NfL, total tau). Hippocampal, caudate and putamen volumes were slightly larger in the regression group, the opposite of what was hypothesized. A slightly lower amyloid load was found on the PET scans for the regression group, but no differences were noted on tau PET.

conclusionsSome proteomics biomarker findings suggest that individuals with DS who experience acute regression may be at increased risk for AD at an earlier age in comparison to unaffected adults with DS. However, due to the age of the group (mean 38 years), it may be too early to observe meaningful group differences on image-based biomarkers.

Indexed as

Alzheimer’s diseasebiomarkersdown syndromeregression

Identifiers

PMID34439728
PMCPMC8391552

What Socratic holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.