Homozygosity for moyamoya disease risk allele leads to moyamoya disease with extracranial systemic and pulmonary vasculopathy

Hiroyuki Fukushima, Toshiki Takenouchi, Kenjiro Kosaki

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Moyamoya disease is characterized by diffuse distal intracranial stenosis. Recently, RNF213 has been identified as a susceptibility gene in the development of this condition. Pulmonary hypertension is a rare progressive vasculopathy with an unknown etiology. The co-occurrence of pulmonary hypertension and Moyamoya disease has been described in four patients; however, whether this co-occurrence represents a chance association or a common vascular pathology has remained unknown. Here, we report two unrelated male patients who presented during their childhood with dyspnea on exertion. Systemic vascular imaging studies revealed the presence of pulmonary hypertension and Moyamoya disease in both patients. Medical exome sequencing revealed that both patients had a homozygous mutation for p.Arg4810Lys in RNF213. We suggest that homozygosity in RNF213 may lead to a novel entity involving the brain and lung. Interestingly, when present in a heterozygous state, this mutation causes a classic cerebral vascular disease, Moyamoya disease. In the homozygous state, the exact same mutation led to Moyamoya disease with extracranial systemic vasculopathy in at least two patients. From a clinical standpoint, cerebrovascular or pulmonary vascular investigations may be warranted in patients with pulmonary hypertension or Moyamoya disease, respectively.

Original languageEnglish
Pages (from-to)2453-2456
Number of pages4
JournalAmerican Journal of Medical Genetics, Part A
Volume170
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

Keywords

  • brain
  • exome sequencing
  • lung
  • Moyamoya disease
  • pulmonary hypertension
  • RNF213
  • vasculopathy

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics

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