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MEGDEL Syndrome.

Josef Finsterer1, Fulvio A Scorza2, Ana C Fiorini3

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Summary
This summary is machine-generated.

MEGDEL syndrome, a rare genetic disorder, involves 3-methylglutaconic aciduria and neurological issues due to SERAC1 gene mutations. Research reveals a wider range of affected organs beyond the brain and ears.

Keywords:
Glutaconic acidHypotoniaLeigh syndromeMEGDELMitochondrialRibosomalSpasticity

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Area of Science:

  • Genetics
  • Biochemistry
  • Neurology

Background:

  • MEGDEL syndrome is an autosomal recessive disorder.
  • Characterized by 3-methylglutaconic aciduria, psychomotor delay, hypotonia, deafness, and Leigh-like brain lesions.
  • Caused by mutations in the serine active site-containing protein 1 (SERAC1) gene.

Purpose of the Study:

  • To elucidate the role of SERAC1 in MEGDEL syndrome.
  • To expand the understanding of the phenotypic spectrum of MEGDEL syndrome.
  • To highlight diagnostic and prognostic considerations.

Main Methods:

  • Genetic analysis to identify SERAC1 mutations.
  • Biochemical studies on SERAC1 protein function in phospholipid metabolism.
  • Clinical case reviews to define the phenotypic spectrum.

Main Results:

  • SERAC1 protein is crucial for phospholipid exchange at the mitochondria-endoplasmic reticulum interface.
  • SERAC1 is involved in phosphatidylglycerol remodeling, vital for mitochondrial function and cholesterol transport.
  • Over 102 patients reported, revealing a broader phenotype affecting eyes, endocrine organs, heart, nerves, and muscles.

Conclusions:

  • SERAC1 mutations cause a complex multisystem disorder with a wide clinical spectrum.
  • Diagnosis requires multidisciplinary assessment and genetic confirmation.
  • Prognosis is generally poor, with early mortality, though juvenile forms exist.