Two novel deletions in hypotonia-cystinuria syndrome

Mol Genet Metab. 2012 Nov;107(3):614-6. doi: 10.1016/j.ymgme.2012.06.011. Epub 2012 Jun 26.

Abstract

Hypotonia-cystinuria syndrome (HCS) is an autosomal recessive disorder caused by combined deletions of SLC3A1 and PREPL. Clinical features include cystinuria, neonatal hypotonia with spontaneous improvement, poor feeding in neonates, hyperphagia in childhood, growth hormone deficiency, and variable cognitive problems. Only 14 families with 6 different deletions have been reported. Patients are often initially misdiagnosed, while correct diagnosis enables therapeutic interventions. We report two novel deletions, further characterizing the clinical and molecular genetics spectrum of HCS.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Transport Systems, Basic / deficiency
  • Amino Acid Transport Systems, Basic / genetics*
  • Amino Acid Transport Systems, Neutral / deficiency
  • Amino Acid Transport Systems, Neutral / genetics*
  • Base Sequence
  • Child
  • Chromosome Deletion
  • Chromosomes, Human, Pair 21 / genetics
  • Craniofacial Abnormalities / genetics*
  • Craniofacial Abnormalities / pathology
  • Cystinuria / genetics*
  • Cystinuria / pathology
  • Female
  • Genetic Heterogeneity
  • Homozygote
  • Humans
  • Infant
  • Intellectual Disability / genetics*
  • Intellectual Disability / pathology
  • Male
  • Mitochondrial Diseases / genetics*
  • Mitochondrial Diseases / pathology
  • Molecular Sequence Data
  • Muscle Hypotonia / genetics*
  • Muscle Hypotonia / pathology
  • Prolyl Oligopeptidases
  • Sequence Deletion
  • Serine Endopeptidases / deficiency
  • Serine Endopeptidases / genetics*
  • Severity of Illness Index

Substances

  • Amino Acid Transport Systems, Basic
  • Amino Acid Transport Systems, Neutral
  • SLC3A1 protein, human
  • Serine Endopeptidases
  • PREPL protein, human
  • Prolyl Oligopeptidases

Supplementary concepts

  • Hypotonia-Cystinuria Syndrome