MOrphometric MRI Analysis of Cortical Sulci: Development of NEurodevelopmental Biomarkers of Bipolar Disorder.

Study Overview
=================
Brief Summary
-----------------
Given the phenotypic heterogeneity of bipolar disorder, it seems essential to propose new methodologies to improve the stratification of this pathology in order to describe more homogeneous groups of patients. In this perspective, the neurodevelopmental hypothesis of bipolar disorder seems promising. Brain sulcation is an indirect marker of neurodevelopmental processes. The objective of the study is to highlight sulcal variations between a group of bipolar patients with a neurodevelopmental phenotype (ND) and a group of bipolar subjects without a ND phenotype. A sulcation marker (GPR56) will also be measured from patient blood samples. In order to carry out this project we would like to include 120 participants for a period of 12 months.

Official Title
-----------------
Analyse Des Sillons Corticaux Par IRM morphométrique : développement de Biomarqueurs neurodéveloppementaux Des Troubles Bipolaires

Conditions
-----------------
Bipolar Disorder

Intervention / Treatment
-----------------
* Other: MRI exam


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: For the neurodevelopmental group : The volunteer has at least 2 of the 12 neurodevelopmental criteria For the non-neurodevelopmental group The volunteer does not present any of the 12 neurodevelopmental criteria List of the 12 neurodevelopmental criteria : The volunteer had at birth a paternal age ≥ 40 years The volunteer had at birth a maternal age ≥ 35 years The volunteer was born by cesarean section The volunteer had a history of perinatal infection The volunteer has a history of generalized anxiety disorder that began before the age of 16 (≤ 15 years) The volunteer has a history of an eating disorder that began before the age of 16 (≤ 15 years) The volunteer has a history of a substance use disorder (excluding tobacco) as described in the DSM-5 prior to age 16 (≤ 15 years) The volunteer has a learning disability or dys disorder as defined in the DSM-5 or number of repeats > 2 The volunteer has a history of trauma assessed as severe by the CTQ self-assessment questionnaire The volunteer has symptoms suggestive of Attention Deficit Hyperactivity Disorder (WURS score > 46) The volunteer has a history of psychotic features during episodes. The volunteer has an early age of onset of bipolar disorder at an age below 18 years. Exclusion Criteria: Serious symptomatic or unstable physiological or medical condition (including pregnancy) History of stable or non-stable psychiatric illness, schizophrenia or any other condition that may interfere with bipolar disorder History of comorbid autism spectrum disorder History of severe head injury (GCS<8 at time of injury) Neurological disorder affecting central nervous system function Moderate to severe substance use disorder (>=4/11 as defined in the DSM-5) with the exception of tobacco use disorder Under court protection or guardianship Unable to give the volunteer informed information, or the volunteer refuses to sign the consent form Insufficient command of the French language to complete the assessments Has a contraindication to MRI

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Other
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Neurodevelopemental Group Non-neurodevelopmental Group
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Neurodevelopmental Group<br>The volunteer presents at least 2 of 12 neurodevelopmental crieria | Other: MRI exam<br>* Brain MRI Morphometric exam<br>|
| Active Comparator: Non-neurodevelopmental Group<br>The volunteer does not present any of the 12 neurodevelopmental crieria | Other: MRI exam<br>* Brain MRI Morphometric exam<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Diifference in the occurrence of sulcal pits allowing to discriminate between a group of bipolar patients presenting a neurodevelopmental phenotype and a group of bipolar patients not presenting this phenotype. | Patients are identified in the neurodevelopmental group following a list of 12 criteria (0 criterion = non neurodevelopmental, at leat 2 criteria = neurodevelopmental) | 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The depth and number of sulcal pits to differentiate a group of bipolar patients with a neurodevelopmental phenotype from a group of bipolar patients without this phenotype. | Patients are identified in the neurodevelopmental group following a list of 12 criteria (0 criterion = non neurodevelopmental, at leat 2 criteria = neurodevelopmental) | 24 months | 
| The demonstration of correlations between different scores used in the clinic that may be related to neurodevelopmental manifestations of bipolar disorder (scales: WURS, minor neurological signs scale) and the number of sulcal-pits. | Patients are identified in the neurodevelopmental group following a list of 12 criteria (0 criterion = non neurodevelopmental, at leat 2 criteria = neurodevelopmental) | 24 months | 
| The blood level of GRP56 messenger RNA measured in whole blood by quantitative PCR to differentiate a group of bipolar patients with a neurodevelopmental phenotype and a group of bipolar patients without this phenotype | Patients are identified in the neurodevelopmental group following a list of 12 criteria (0 criterion = non neurodevelopmental, at leat 2 criteria = neurodevelopmental) | 24 months | 
| Genetic polymorphisms of GPR56 to differentiate between a group of bipolar patients with a neurodevelopmental phenotype and a group of bipolar patients without this phenotype | Patients are identified in the neurodevelopmental group following a list of 12 criteria (0 criterion = non neurodevelopmental, at leat 2 criteria = neurodevelopmental) | 24 months | 
| Protein quantification of the circulating fraction of GP56 in plasma and serum to differentiate a group of bipolar patients with a neurodevelopmental phenotype from a group of bipolar patients without this phenotype. | Patients are identified in the neurodevelopmental group following a list of 12 criteria (0 criterion = non neurodevelopmental, at leat 2 criteria = neurodevelopmental) | 24 months |