Anti-LRP4 autoantibodies in Chinese patients with myasthenia gravis.

Abstract:

INTRODUCTION:We assessed antibodies against low-density lipoprotein receptor-related protein 4 (LRP4-Ab) in a Chinese population with myasthenia gravis (MG). METHODS:Serum samples from 116 patients and 80 controls were collected. Acetylcholine receptor antibodies(AChR-Ab) and muscle-specific receptor tyrosine kinase antibodies (MuSK-Ab) were tested using an enzyme-linked immune absorption assay, and LRP4-Ab was identified using a cell-based assay. MG patients with neither AChR-Ab nor MuSK-Ab were defined as double-seronegative MG (dSN-MG). RESULTS:Two of 116 (1.7%) of all patients and 2 of 50 (1%) dSN-MG patients were positive for LRP4-Ab. These 2 patients had ocular MG. Following treatment with acetylcholinesterase inhibitor and prednisone, both achieved full remission. CONCLUSIONS:This study shows that LRP4-Ab is a pathogenic antibody in MG. LRP4-MG seems to be characterized by mild disease severity and favorable therapeutic effect in contrast with other types of MG. Muscle Nerve 56: 938-942, 2017.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Li Y,Zhang Y,Cai G,He D,Dai Q,Xu Z,Chu L

doi

10.1002/mus.25591

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

938-942

issue

5

eissn

0148-639X

issn

1097-4598

journal_volume

56

pub_type

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