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MCT8 deficiency in a patient with a novel frameshift variant in the SLC16A2 gene.

Kei WakabayashiHitoshi OsakaKarin KojimaTaichi ImaizumiToshiyuki YamamotoTakanori Yamagata
Published in: Human genome variation (2021)
MCT8 deficiency is an X-linked recessive disorder. We report the case of a 2-year-old Japanese boy with MCT8 deficiency caused by a novel frameshift variant, NM_006517.5(SLC16A2_v001):c.966dup [p.(Ile323Hisfs*57)]. He presented no head control and spoke no meaningful words, indicating severe developmental delay. Although missense or in-frame mutations of SLC16A2 are usually related to milder phenotypes and later-onset pyramidal signs, loss-of-function mutations are expected to cause severe clinical symptoms.
Keyphrases
  • intellectual disability
  • replacement therapy
  • early onset
  • photodynamic therapy
  • copy number
  • drug induced
  • genome wide
  • gene expression
  • physical activity
  • optic nerve
  • light emitting