A novel mutation in PNPLA2 causes neutral lipid storage disease with myopathy and triglyceride deposit cardiomyovasculopathy: A case report and literature review

Kimihiko Kaneko, Hiroshi Kuroda, Rumiko Izumi, Maki Tateyama, Masaaki Kato, Koichiro Sugimura, Yasuhiko Sakata, Yoshihiko Ikeda, Ken ichi Hirano, Masashi Aoki

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Mutations in PNPLA2 cause neutral lipid storage disease with myopathy (NLSDM) or triglyceride deposit cardiomyovasculopathy (TGCV). We report a 59-year-old patient with NLSDM/TGCV presenting marked asymmetric skeletal myopathy and cardiomyovasculopathy. Skeletal muscle and endomyocardial biopsies showed cytoplasmic vacuoles containing neutral lipid. Gene analysis revealed a novel homozygous mutation (c.576delC) in PNPLA2. We reviewed 37 genetically-proven NLSDM/TGCV cases; median age was 30. years; distribution of myopathy was proximal (69%) and distal predominant (16%); asymmetric myopathy (right > left) was reported in 41% of the patients. Frequently-affected muscles were posterior compartment of leg (75%), shoulder girdle to upper arm (50%), and paraspinal (33%). Skeletal muscle biopsies showed lipid accumulation in 100% and rimmed vacuoles in 22%. Frequent comorbidities were cardiomyopathy (44%), hyperlipidemia (23%), diabetes mellitus (24%), and pancreatitis (14%). PNPLA2 mutations concentrated in Exon 4-7 without apparent genotype-phenotype correlations. To know the characteristic features is essential for the early diagnosis of NLSDM/TGCV.

Original languageEnglish
Pages (from-to)634-641
Number of pages8
JournalNeuromuscular Disorders
Volume24
Issue number7
DOIs
Publication statusPublished - 2014 Jul

Keywords

  • Adipose triglyceride lipase
  • Asymmetric myopathy
  • Neutral lipid storage disease with myopathy
  • Patatin-like phospholipase domain-containing 2
  • Triglyceride deposit cardiomyovasculopathy

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Neurology
  • Clinical Neurology
  • Genetics(clinical)

Fingerprint Dive into the research topics of 'A novel mutation in PNPLA2 causes neutral lipid storage disease with myopathy and triglyceride deposit cardiomyovasculopathy: A case report and literature review'. Together they form a unique fingerprint.

Cite this