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New Cases of DHTKD1 Mutations in Patients with 2-Ketoadipic Aciduria

  • Ashlee R. Stiles
  • Leah Venturoni
  • Grace Mucci
  • Naser Elbalalesy
  • Michael Woontner
  • Stephen Goodman
  • Jose E. AbdenurEmail author
Case Report
Part of the JIMD Reports book series (JIMD, volume 25)

Abstract

2-Ketoadipic aciduria (OMIM 204750), a defect in the catabolic pathway of tryptophan, lysine, and hydroxylysine, is characterized by elevations in 2-ketoadipic, 2-aminoadipic, and 2-hydroxyadipic acids. Patients with the aforementioned biochemical profile have been described with a wide range of clinical presentations, from early-onset developmental delay, epilepsy, ataxia, and microcephaly to completely normal. This broad range of phenotypes has led some to question whether 2-ketoadipic aciduria represents a true disease state or if the biochemical abnormalities found in these patients merely reflect an ascertainment bias. We present four additional individuals from two families, with 2-ketoadipic aciduria with compound heterozygous or homozygous mutations in DHTKD1, three of which remain asymptomatic.

Keywords

2-Aminoadipic 2-Ketoadipic aciduria 2-Oxoadipic aciduria DHTKD1 Hydroxylysine Lysine Organic acidemia Tryptophan 

Notes

Acknowledgments

We thank the families for their steadfast commitment to participate in this study, the generous support of the Fry Family Foundation to CHOC Children’s Metabolic Program, and Dr. Bridget Wilcken for her cooperation and support.

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Copyright information

© SSIEM and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Ashlee R. Stiles
    • 1
  • Leah Venturoni
    • 2
  • Grace Mucci
    • 3
  • Naser Elbalalesy
    • 4
  • Michael Woontner
    • 2
  • Stephen Goodman
    • 2
  • Jose E. Abdenur
    • 1
    • 5
    Email author
  1. 1.Division of Metabolic DisordersCHOC Children’s HospitalOrangeUSA
  2. 2.Anschutz Medical Campus and Children’s Hospital ColoradoUniversity of Colorado at DenverAuroraUSA
  3. 3.Division of PsychologyCHOC Children’s HospitalOrangeUSA
  4. 4.Division of NeurologyCHOC Children’s HospitalOrangeUSA
  5. 5.Department of PediatricsUniversity of California IrvineIrvineUSA

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