Evidence map›Paper›PMID 41834587›Full record

Observational studyNeuropsychopharmacology reports2026

Serum Amyloid β Oligomer May Predict Treatment Response in Middle-Aged and Late-Life Patients With Depression.

Kentaro Shimizu, Seita Yasuda, Hitoshi Maeshima, Tomoya Ichikawa, Hajime Baba

Abstract readObservational Study
In one paragraph

Observational study in Neuropsychopharmacology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–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

2 citing papers in PubMed.

  1. Article
  2. Observational
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

5 authors.

Kentaro ShimizuDepartment of Psychiatry & Behavioral Science, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Seita YasudaDepartment of Psychiatry, Juntendo University Koshigaya Hospital, Saitama, Japan.
Hitoshi MaeshimaDepartment of Psychiatry & Behavioral Science, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Tomoya IchikawaDepartment of Psychiatry, Juntendo University Urayasu Hospital, Chiba, Japan.
Hajime BabaDepartment of Psychiatry & Behavioral Science, Juntendo University Graduate School of Medicine, Tokyo, Japan.ORCID https://orcid.org/0000-0001-9678-8776

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimLate-life patients with depression are reportedly less responsive to antidepressant treatment than younger patients. Additionally, patients who have depression comorbid with Alzheimer's disease (AD) and those with an amyloid β (Aβ) burden have shown a poor response to antidepressant treatment, suggesting that AD pathology may contribute to treatment resistance. A recent report indicated that Aβ oligomers in blood have increased in patients with AD and are associated with AD pathology. This study was performed to reveal the relationship between blood Aβ oligomers and the response to antidepressant treatment in middle-aged and late-life patients with depression.

methodsIn this observational study, serum levels of Aβ40, Aβ42, and Aβ oligomers were evaluated in 80 inpatients with major depressive disorder aged ≥ 40 years. Depressive symptoms were assessed at admission (baseline) and after 4 weeks of treatment.

resultsThere were significantly fewer treatment responders among patients with than without serum Aβ oligomers (p = 0.016). Serum Aβ oligomers were found to influence the treatment response even after control for age, sex, number of depressive episodes, severity of depression, and Mini-Mental State Examination scores (p = 0.031).

conclusionsThese results suggest that serum Aβ oligomers may predict a poor response to antidepressant treatment in middle-aged and late-life patients with depression. Our findings also lead us to speculate that elderly patients with a poor treatment response may share AD-related pathophysiological features or neural vulnerability.

Indexed as

Amyloid beta-PeptidesAntidepressive AgentsMajor Depressive DisorderPeptide FragmentsAdultAgedBiomarkersFemaleHumansMaleMiddle AgedTreatment OutcomeAmyloid beta-Peptidesamyloid beta-protein (1-40)amyloid beta-protein (1-42)Antidepressive AgentsBiomarkersPeptide Fragmentsamyloid β oligomersantidepressant treatmentbiomarkerslate‐life depressionmajor depressive disorder

Identifiers

PMID41834587
PMCPMC13581076

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Registered trials

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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 OpenQuestion graph.