ClinicalTrials.gg
RecruitingNCT04946916Nfl_COGUpdated Jul 24, 2025

Neurofilament Light Chains and Cognitive Impairment in Chronic Psychiatric Disease

An interventional study of blood sample taken in Schizophrenia, Bipolar Disorder and Alzheimer Disease, sponsored by Hôpital le Vinatier. Recruiting at 2 sites in France. Open to participants aged 45 Years to 80 Years. Per ClinicalTrials.gov, last updated 2025-07-24.

Sponsored by Hôpital le Vinatier · Not applicable, Interventional, and Diagnostic

From the registry’s dates

  • Started Oct 2021; still recruiting 5 years later.

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Phase
Not applicable
Study type
Interventional
Enrollment
120
Allocation
Non-randomized
Ages
45 Years to 80 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-15

Among 32 studies in Schizophrenia by Hôpital le Vinatier — 6 open to participants now, 6 under way, none of them phase 3. Schizophrenia · Hôpital le Vinatier.

Planned enrollment
7th of 31
120 · median 60
Started
2021
with 1 other
No phase
31 of 32
6 open now
Registered
28th of 32
by date

Among the 32 studies in Schizophrenia by Hôpital le Vinatier, this one is the 7th largest by planned enrollment of the 31 interventional ones that give a count, is one of 2 that started in 2021, is one of 31 with no phase, and was the 28th registered.

Schizophrenia

3,567 studies on the registry are indexed under Schizophrenia; 493 are open to participants now.

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Open to participants now

6 of the 32 studies in Schizophrenia by Hôpital le Vinatier are open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

All 6 open studies →

Where they have run

Who these studies take

Of the 332 Schizophrenia studies recruiting now, 63 (19%) set no upper age limit and 258 (78%) stop at 75 or younger; 42 take children under 18; 83 take healthy volunteers.

This study: 45 Years to 80 Years · all sexes · no healthy volunteers.

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02

Study summary

The validation of biomarkers allowing the discrimination of cognitive and behavioral disorders of psychiatric origin from those of neurodegenerative origin would facilitate diagnosis and improve patient management. Neurofilaments, which are markers of neuronal lysis, appear to be a promising biomarker. In a previous preliminary study, the investigators demonstrated significantly lower concentrations of neurofilaments in CSF of psychiatric patients compared to neurodegenerative diseases.

The main objective of this study is to validate the plasma assay of neurofilament light chain as a biomarker for the differential diagnosis of psychiatric or neurodegenerative cognitive impairment. Other biomarkers of interest (Tau, TDP-43, GFAP and UCH-L1) will also be analyzed.

A sub-part of this study will also focus on the retrospective analysis of the CSF/Plasma correlations of the different biomarkers mentioned above from tube bottom samples taken in routine care.

Read the detailed description

One hundred twenty participants will be included in this study

  • 30 participants suffering from psychiatric disorders (bipolar disorder or schizophrenia) without cognitive impairment
  • 30 participants suffering from psychiatric disorders (bipolar disorder or schizophrenia) with cognitive impairment
  • 30 participants with a biological diagnosis of Alzheimer's disease
  • 30 participants with frontotemporal dementia according to Rascosky's criteria

All the participants will perform cognitive, behavioral, and psychiatric evaluation and will be have blood sample taken.

03

Conditions studied

  • Schizophrenia
  • Bipolar Disorder
  • Alzheimer Disease
  • FTD

Keywords

  • dementia
  • biomarker
04

Who can participate

Ages eligible
45 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • haven given written consent

Participants with psychiatric conditions:

  • Schizophrenia ( criteria) with or without cognitive involution
  • Bipolar disorder (DSM-V criteria) with or without cognitive involution

Participants with neurodegenerative disease:

  • probable or definite FTD (Rascovsky criteria 2011)
  • Biological Alzheimer's disease with typical CSF (NIA-AA 2011)

Exclusion criteria

Exclusion Criteria:

  • Uninterviewable patient and/or missing history
  • History of recent or previous head trauma with loss of consciousness
  • History of ischemic or hemorrhagic stroke
  • Chronic alcoholism / chronic drug use
  • Progressive somatic pathology / severe metabolic disorder / poorly controlled epilepsy
  • Age \< 45 years
  • Age > 80 years
  • Electroconvulsive therapy for less than 6 months
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

DSM diagnostic criteria

The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.

05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
120 participants (estimated)

Study arms

  • Experimental
    Participant with psychiatric condition without cognitive impairment

    In the psychiatric condition group without cognitive impairment will be included participants with schizophrenia or bipolar disorder according to DSM V criteria.

    Diagnostic Test: blood sample taken

  • Experimental
    Participant with psychiatric condition with cognitive impairment

    In the psychiatric condition group with cognitive impairment will be included participants with schizophrenia or bipolar disorder according to DSM V criteria. To date, there are no clinical criteria for defining the dementia evolution of psychiatric disorders. The diagnosis of psychiatric disorder with cognitive involution is often made on the basis of subjective criteria or on the appreciation of health care teams. In the present study, cognitive involution will be defined by the occurrence of cognitive deterioration objectified by disturbed neuropsychological tests and the occurrence of progressive behavioral changes contrasting with the person's previous state and reported by the care team, a member of the family or by the patient himself. Cognitive involution must be accompanied by a decrease in autonomy with respect to the person's previous abilities.

    Diagnostic Test: blood sample taken

  • Experimental
    Patients with biological Alzheimer's disease

    Alzheimer's disease with frontal, amnestic, language, and visual presentation with typical Alzheimer CSF according to the 2011 NIA-AA diagnostic criteria.

    Diagnostic Test: blood sample taken

  • Experimental
    Patient with fronto-temporal dementia

    Probable or definite Fronto-temporal dementia, mostly behavioral variant of FTD (according to the diagnostic criteria for FTDb of Rascovsky, 2011) but Semantic Disease, Primary Progressive Non-Fluent Aphasia, Progressive Supra-Nuclear Palsy-DFT will be accepted if behavioral onset.

    Diagnostic Test: blood sample taken

Interventions

  • Diagnostic testblood sample taken

    Comparaison of Neurofilament light chain serum concentration between the arms

    Also known as: Cognitive tests and psychiatric questionnaires

06

What researchers measure

Primary outcomes

  1. neurofilament light chain

    serum neurofilament light chain concentration

    Time frame: two months

Secondary outcomes

  1. Total tau

    serum tau protein concentration

    Time frame: two months

  2. GFAP Glial fibrillary acidic protein

    Serum GFAP concentration

    Time frame: two months

  3. neurofilament heavy chain (pNF-h)

    Serum neurofilament heavy chain (pNF-h) concentration

    Time frame: two months

07

Study locations

2 of 2 sites recruiting
08

References and documents

Individual participant data

Plan to share: Yes — Clinical and biological IPD

Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report, Analytic code

Time frame: 4 years

Access criteria: all criterias

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Oct 2021 (actual). Primary completion is estimated for Mar 2027, 65 months after the start.

Of 756 non-industry interventional studies with no phase under Schizophrenia, half reached primary completion within 33 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 56. This study's planned 65 months is above that.

Counting every sponsor, half of 769 studies reached it within 32 months; a quarter within 16 and three quarters within 56.

How these figures are worked out, and which studies are left out of them.

Registered
Jun 23, 2021
First posted
Jul 1, 2021
StartActual
Oct 22, 2021
Primary completionEst.
Mar 22, 2027
CompletionEst.
Mar 22, 2028
Last update
Jul 24, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 24, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04946916
Responsible party
Sponsor
First posted
Jul 1, 2021
Start date
Oct 22, 2021
Primary completion
Mar 22, 2027 (estimated)
Completion
Mar 22, 2028 (estimated)
Last update
Jul 24, 2025

Study contacts

Dorey Jean-Michel, MD,PHD
Contact
jean-michel.dorey@ch-le-vinatier.fr
0437915249 ext. +33
SARTELET lydie
Contact
lydie.sartelet@ch-le-vinatier.fr
0437915531 ext. +33
Jean-Michel DOREY, MD, PHD
principal investigator · CH le Vinatier

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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