Gene hunt: could sequencing families unlock the roots of mysterious mental illness?
NCT ID NCT07686653
First seen Jul 07, 2026 · Last updated Jul 08, 2026 · Updated 1 time
Summary
This study investigates whether sequencing the genomes of patients with early-onset or unusual psychiatric disorders—along with their biological parents—can uncover hidden genetic causes. Researchers aim to find disease-related gene variants in at least 12% of participants aged 3 to 50 who have atypical features like early onset, treatment resistance, or an unclear diagnosis. If successful, this approach could improve understanding and diagnosis of these complex conditions.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could show that genome sequencing helps diagnose genetic causes for certain psychiatric disorders, potentially guiding more personalized care.
- What could go wrong
- This is an early-stage study with a modest goal (12% diagnosis rate). It may not find enough genetic links, and results may not apply to all psychiatric conditions.
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
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About 255 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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May 2029
An estimate. End dates often move.
- Lead sponsor
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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
The index case and his two parents
- Ages
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3 to 50 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide 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: * Index case with one or more psychiatric disorders confirmed by a psychiatrist and/or child psychiatrist, whose evaluations may be supplemented as needed as part of their care, and who meets at least ONE of the following criteria for atypicality: * Early age of onset * Unusual course of the disorder (polymorphic/fluctuating) * Treatment resistance * Disorder classified as "unspecified" by the DSM-5 with significant functional impact * Index case aged 3 to 50 years, inclusive * Consent signed by the biological parents and by the "index case, if of legal age" * Index case and their parents enrolled in or eligible for a social security program * Sample collection possible from the index case and their two known biological parents Exclusion Criteria: * Genetic testing previously performed (CGH array, targeted gene testing, gene panel, etc.) * Parent(s) and/or the index case subject to a court-ordered protective measure * The index case and his or her parents have a condition that, in the investigator's opinion, would contraindicate the subject's participation in the study * Presence of an intellectual developmental disorder confirmed by a neuropsychological test or strongly suspected clinically in the index case and/or their parents * Index case with a clear syndromic diagnosis * Index case with a psychiatric disorder already covered by a pre-indication under PFMG2025.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Chu Dijon Bourgogne
Dijon, 21000, France
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