Developmental brain abnormalities and acute encephalopathy in a patient with myopathy with extrapyramidal signs secondary to pathogenic variants in micu1

Katelynn M. Wilton, Joel A. Morales-Rosado, Duygu Selcen, Karthik Muthusamy, Sarah Ewing, Katherine Agre, Katherine C Nickels, Eric W Klee, Mai Lan Ho, Eva Morava

Research output: Contribution to journalArticle

Abstract

Mitochondria play a variety of roles in the cell, far beyond their widely recognized role in ATP generation. One such role is the regulation and sequestration of calcium, which is done with the help of the mitochondrial calcium uniporter (MCU) and its regulators, MICU1 and MICU2. Genetic variations in MICU1 and MICU2 have been reported to cause myopathy, developmental disability and neurological symptoms typical of mitochondrial disorders. The symptoms of MICU1/2 deficiency have generally been attributed to calcium regulation in the metabolic and biochemical roles of mitochondria. Here, we report a female child with heterozygous MICU1 variants and multiple congenital brain malformations on MRI. Specifically, she shows anterior perisylvian polymicrogyria, dysmorphic basal ganglia, and cerebellar dysplasia in addition to white matter abnormalities. These novel findings suggest that MICU1 is necessary for proper neurodevelopment through a variety of potential mechanisms, including calciummediated regulation of the neuronal cytoskeleton, Miro1-MCU complexmediated mitochondrial movement, or enhancing ATP production. This case provides new insight into the molecular pathogenesis of MCU dysfunction and may represent a novel diagnostic feature of calcium-based mitochondrial disease.

Original languageEnglish (US)
Pages (from-to)2-28
Number of pages27
JournalJIMD Reports
Volume53
Issue number1
DOIs
StatePublished - 2020

Keywords

  • Acute disseminated encephalomyelitis
  • Genetic
  • MICU1
  • MICU1 deficiency
  • MPXPS
  • Mitochondria

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)

Fingerprint Dive into the research topics of 'Developmental brain abnormalities and acute encephalopathy in a patient with myopathy with extrapyramidal signs secondary to pathogenic variants in micu1'. Together they form a unique fingerprint.

  • Cite this