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Spectrometry (MRM) Versus I 125 Radioimmunoassay (RIA) for Quantification of Orexin-A of Patients With Hypersomnolence — MRM-OREX  

Narcolepsy Clinical Trial

Official title:
Multiple Reaction Monitoring (MRM) Versus I 125 Radioimmunoassay (RIA) for the Quantification of Orexin-A/Hypocretin-1 Levels in Cerebrospinal Fluid: a Prospective Diagnostic Validation Study in Patients With Hypersomnolence

Clinical Trial Summary

In humans, selective loss of orexin neurons is responsible for type 1 narcolepsy (NT1), or narcolepsy with cataplexy, or orexin deficiency syndrome. The International Classification of Sleep Disorders 3rd edition (ICSD-3) distinguishes between hypersomnolence of central origin: NT1, narcolepsy type 2 (NT2), or narcolepsy without cataplexy, and idiopathic hypersomnia (HI). These rare conditions are all characterised by hypersomnolence (excessive daytime sleepiness, or excessive need for sleep), which is the primary and often most disabling symptom. A level of ORX-A in cerebrospinal fluid (CSF) (<110 pg/mL) is a very sensitive and specific biomarker of NT1, currently sufficient for the diagnosis of this condition. In contrast, ORX neurons are thought to be intact in IH and NT2, and the pathophysiological mechanisms underlying these diseases remain unknown. Thus, their diagnosis is based solely on clinical and electrophysiological criteria. The objective of this project is to determine the validity of a mass spectrometric technique for the determination of ORX-A in the cerebral spinal fluid of patients suffering from hypersomnolence in comparison with the radioimmunoassay which is the reference technique.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT05615584
Study type Interventional
Source University Hospital, Montpellier
Contact
Status Recruiting
Phase N/A
Start date February 15, 2023
Completion date October 30, 2025
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