Extensive Clinical Flow Cytometric Lymphocyte Phenotyping in Myasthenia Gravis: A Single-Center Study

Area of Science:

• Immunology
• Neurology
• Autoimmune Diseases

Background:

• Myasthenia gravis (MG) is an autoimmune neurological disorder causing muscle fatigue.
• The disease involves autoantibodies targeting neuromuscular junction receptors, but its pathogenesis is not fully understood.
• Identifying prognostic biomarkers is crucial for managing MG.

Purpose of the Study:

• To characterize peripheral blood lymphocytes in MG patients.
• To identify prognostic biomarkers for disease progression in MG.
• To investigate the role of T and B cell phenotypes in MG outcomes.

Main Methods:

• Retrospective analysis of flow cytometry data from 76 incident MG cases and healthy controls.
• Standardized T cell and B cell panels were used to analyze cell frequencies and phenotypes.
• Clinical data from the Swedish MG registry was used for outcome analysis, including time to minimal disease manifestation.

Main Results:

• Untreated MG patients exhibited higher frequencies of CD4 T cells compared to age-matched healthy individuals.
• High CD4 T cell frequencies (>75% of total T cells) were associated with a reduced probability of achieving minimal disease within one year.
• CD4 T cell frequency emerged as an independent risk factor for time to minimal disease manifestation in multivariable analysis.

Conclusions:

• MG patients demonstrate an altered CD4 T cell phenotype.
• CD4 T cell frequency serves as a potential prognostic biomarker for disease progression in myasthenia gravis.
• Further research into T cell alterations may elucidate MG immunopathogenesis.