Publications by authors named "P Chretien"
Long-Term Clinical and Biological Prognostic Factors of Anti-NMDA Receptor Encephalitis in Children.
Neurol Neuroimmunol Neuroinflamm
March 2025
Background And Objectives: Anti-NMDAR encephalitis (NMDARE) is a severe neurologic condition, and recently, the NMDAR Encephalitis One-Year Functional Status (NEOS) score has emerged as a 1-year prognostic tool. This study aimed to evaluate NEOS score and biomarker (neurofilament light chains [NfL], total-Tau protein, glial fibrillary acidic protein, and serum cytokines) correlation with modified Rankin Scale (mRS), cognitive impairment, and clinical recovery in pediatric NMDARE over 2 years.
Methods: In this French multicenter observational study, 104 pediatric patients with NMDARE were followed for a minimum of 2 years.
Background: Multiple sclerosis (MS) may occur before the age of 18. Differentiation between paediatric MS (PedMS) and other demyelinating syndromes (ODSs) is challenging. In adult with MS, the kappa free light chain (KFLC) index has proven to be a reliable marker of intrathecal Ig synthesis.
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- The study analyzed 166 patients with acute neurological symptoms linked to anti-GQ1b antibodies, revealing frequent symptoms like areflexia, sensory issues, and muscle weakness.
- The majority of patients were treated with intravenous immunoglobulins, leading to complete neurological recovery for 69% at the one-year mark, although 15% experienced relapses.
- Key predictors for incomplete recovery included age over 70, initial ICU admission, and absence of anti-GQ1b antibodies; no predictors for relapse were identified.
Objectives: Given that method validation is mandatory for compliance with the International Organization for Standardization (ISO) 15,189 standard requirements, we evaluated the analytical performance of the AQUIOS CL system (Beckman Coulter) and compared it with two bead-based flow cytometry (FCM) protocols (BD FACSCAntoII and Beckman Coulter DxFLEX). There are no comparative literature data on standardized protocols for counting lymphocyte subsets on the new-generation cytometer DxFLEX.
Methods: We evaluated the AQUIOS CL's performance with regard to accuracy, linearity and stability by using dedicated control cell samples and patient samples.