BAG3 myopathy is not always associated with cardiomyopathy

TY - JOUR

T1 - BAG3 myopathy is not always associated with cardiomyopathy

AU - Andersen, Annarita Ghosh

AU - Fornander, Freja

AU - Schrøder, Henrik Daa

AU - Krag, Thomas

AU - Straub, Volker

AU - Duno, Morten

AU - Vissing, John

N1 - Copyright © 2018 Elsevier B.V. All rights reserved.

PY - 2018/9

Y1 - 2018/9

N2 - Bag3opathy is a rare myofibrillar myopathy (MFM) caused by a mutation in the Bcl-2 associated-athanogene-3 gene. Less than twenty patients have been described, almost all with severe cardiac involvement. We present a 26-year-old man with a c.626C>T (p.Pro209Leu) mutation in the Bcl-2 associated-athanogene-3 gene (BAG3). Our patient presented with problems running before he turned 10 and rapidly progressing, proximal muscle weakness and rigidity of the neck and back. Muscle biopsy showed Z-disc streaming, vacuoles, which is typical findings of Bag3opathy, as well as accumulation of filamentous materials. He rapidly developed respiratory insufficiency necessitating assisted ventilation, and became wheelchair bound by age 13. The progression of his muscle disease is characteristic of Bag3opathy, but unlike other reported cases, he had no evidence of cardiac involvement at age 25 years, despite serial Holter monitoring, ECG and echocardiographs. This case illustrates that counseling of patients with BAG3 myopathy should not predict an inevitable occurrence of cardiomyopathy.

AB - Bag3opathy is a rare myofibrillar myopathy (MFM) caused by a mutation in the Bcl-2 associated-athanogene-3 gene. Less than twenty patients have been described, almost all with severe cardiac involvement. We present a 26-year-old man with a c.626C>T (p.Pro209Leu) mutation in the Bcl-2 associated-athanogene-3 gene (BAG3). Our patient presented with problems running before he turned 10 and rapidly progressing, proximal muscle weakness and rigidity of the neck and back. Muscle biopsy showed Z-disc streaming, vacuoles, which is typical findings of Bag3opathy, as well as accumulation of filamentous materials. He rapidly developed respiratory insufficiency necessitating assisted ventilation, and became wheelchair bound by age 13. The progression of his muscle disease is characteristic of Bag3opathy, but unlike other reported cases, he had no evidence of cardiac involvement at age 25 years, despite serial Holter monitoring, ECG and echocardiographs. This case illustrates that counseling of patients with BAG3 myopathy should not predict an inevitable occurrence of cardiomyopathy.

U2 - 10.1016/j.nmd.2018.06.019

DO - 10.1016/j.nmd.2018.06.019

M3 - Journal article

C2 - 30061062

SN - 0960-8966

VL - 28

SP - 798

EP - 801

JO - Neuromuscular Disorders

JF - Neuromuscular Disorders

IS - 9

ER -