Biomarkers Predictive of Thymic Evolution and Therapeutic Response at 2 Years in Patients With a First Psychotic Episode

Summary

Psychosis is a severe, common, and disabling psychological disorder. An epidemiological study conducted in England reported an incidence of 34 new cases per 100,000 person-years, with a peak between 16 and 19 years of age. Following a first psychotic episode, two clinical evolutions are possible: thymic psychosis (17%) and non thymic psychosis (83%). The first includes bipolar disorders with a psychotic component and major depressive disorders with a psychotic component; the second, other psychotic disorders, mainly schizophrenia. One of the major difficulties encountered is the frequent impossibility of specifying the type of psychosis at the beginning of the psychotic episode. However, these disorders require different therapies, particularly medication. This leads to a delay in diagnosis with a high risk of relapse.

The semiological study of these diseases being carried out within the framework of interviews, it seems interesting to be able to record these and to obtain a quantitative and objective measurement through the study of language. The use of machine learning has made it possible to distinguish patients with schizophrenia from those with bipolar disorder by graphical analysis of language in a more efficient way than with clinical scales.Moreover, it is possible to identify linguistic markers: thus, an alteration of syntactic structures and prosody would be more present in non-thymic than in thymic psychoses.

Paraclinical markers are also emerging. In particular, the link between inflammation and mental disorders.For example, an increase in IL-8 has been found only in thymic psychoses.

In this context, it seems essential to be able to distinguish these disorders as early as possible through the combined use of clinical and paraclinical markers, and to be able to better understand their pathophysiology.

Conditions

• First-episode Psychosis

Interventions

OTHER

Recorded interview

A recorded clinical interview, transcribed verbatim and blinded analyzed

OTHER

Clinical scales

Answering to clinical scales : PANSS (Positive and Negative Syndrome Scale); BPRS (Brief Psychiatric Rating Scale); CDSS (Calgary Depression Scale for Schizophrenia); MADRS (Montgomery-Åsberg Depression Rating Scale); Altman; YMRS (Young Mania Rating Scale); GAF (Global Assessment of Functioning); SF-36 (36-Item Short Form Survey); CGI-S (Clinical Global Impression Scale) et CGI-I (CGI-Improvement)

BIOLOGICAL

Blood sample

Blood collection of inflammatory markers (IL-1, sIL-2R, IL-4, IL-6, IL-8 and TNF levels) and 2 EDTA tubes and 2 dry tubes for biological collection (plasma bank and serum bank). This blood sample will be taken during routine sampling.

Sponsors & Collaborators

• University Hospital, Brest

  lead OTHER

Study Design

Allocation

NA

Purpose

DIAGNOSTIC

Masking

NONE

Model

SINGLE_GROUP

Eligibility

Min Age

15 Years

Max Age

30 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2025-03-27

Primary Completion

2027-03-31

Completion

2030-03-31

Countries

• France

Study Locations