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Can a simple blood test unlock secrets of Alzheimer's and depression?

NCT ID NCT07314190

Knowledge-focused Sponsor: Fundació Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only This study
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study is analyzing blood samples from 1,799 people with Alzheimer's, dementia, depression, bipolar disorder, schizophrenia, or Parkinson's disease. Researchers want to see if certain substances in the blood can help doctors diagnose and manage these conditions more accurately. Participants also undergo thinking and memory tests, and some have brain scans. The goal is to improve understanding, not to test a new treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 1,799 people

The number the study aims to enrol. It can still change while the study runs.

Started

Feb 2026

Expected to finish

Dec 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients will be recruited from specialized clinics at Barcelona (Spain), Perugia (Italy), Ulm (Germany), Halle (Germany) and Kuopio (Finland). Target % female in schizophrenia (30%), major depressive disorder (50%), bipolar disorder and controls (55%), Alzheimer's disease and controls (60%), frontotemporal dementia (65%), controls (65%). These percentages match those typically found in these disorders. Unaffected controls are usually spouses or children of patients that are informed about our studies at each clinical site.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age\>18 and donation of blood, * full clinical and psychological assessment * Available neuroimaging is optional as not all patients are suitable. * Age and sex-matched unaffected volunteers without a MD or ND diagnosis are used as controls. * Unaffected controls are usually spouses or children of patients that are informed about our studies at each clinical site. Exclusion Criteria: * Lack of neuropsychological data, * anticoagulant treatment such as acenocoumarol, heparin, warfarin, dabigatran, rivaroxaban, apixaban, drug abuse in the last year, * medical history of cancer affecting the central nervous system that has not been in complete remission for 5 years or longer, * the patient has received potentially neurotoxic chemotherapy and/or patient has received cranial radiotherapy. * Clinical diagnosis of Alzheimer's disease where pathophysiological markers (measured in CSF or plasma) are inconsistent with Alzheimer's disease pathophysiology. * Cognitively healthy volunteers where pathophysiological markers (measured in CSF or plasma) are consistent with Alzheimer's disease or other neurodegenerative pathophysiology.

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Conditions

The condition(s) this trial relates to.

Alzheimer disease bipolar I disorder frontotemporal dementia Lewy body dementia Lewy Body Disease major depressive disorder Parkinson disease schizophrenia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Alzheimer disease Bipolar 1 disorder Dementia with lewy bodies (DLB) Frontotemporal dementia (FTD) Major depressive disorder (MDD) Parkinson disease Schizophenia disorder

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau - IIB Sant Pau

    Barcelona, 08041, Spain

More trials for these conditions

Other studies related to the condition(s) this trial covers.