C3, C5a and anti-acetylcholine receptor antibody as severity biomarkers in myasthenia gravis.

Abstract:

Background:Although the pathogenesis of myasthenia gravis (MG) is well known, prognostic markers are not yet available. We assessed the utility of anti-acetylcholine receptor (AChR) antibody (AChR-ab) titer and concentration of C3, C4, and C5a as potential severity biomarkers in MG. Methods:Levels of C3, C4, C5a, and AChR-ab were measured in 60 AChR-ab-positive patients with MG. Their relationship with clinical severity was analyzed using the activities of daily living (ADL) and MG composite (MGC) scales. Results:AChR-ab titer correlated with severity of MG according to ADL (p = 0.002) and MGC scales (p = 0.001). When patients were classified according to disease duration, a statistically significant correlation between AChR-ab titer and clinical severity was only found in the subgroup of patients with fewer than 5 years from symptoms onset. C5a levels showed a positive correlation with MG severity according to the ADL scale (p = 0.041; τb = 0.18), although C5a levels were not different from the control group. Discussion:AChR-ab titers and C5a levels could potentially be considered markers of severity in patients with MG.

journal_name

Ther Adv Neurol Disord

authors

Aguirre F,Manin A,Fernandez VC,Justo ME,Leoni J,Paz ML,Villa AM

doi

10.1177/1756286420935697

subject

Has Abstract

pub_date

2020-08-10 00:00:00

pages

1756286420935697

eissn

1756-2856

issn

1756-2864

pii

10.1177_1756286420935697

journal_volume

13

pub_type

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