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Horm Metab Res 2016; 48(11): 737-744
DOI: 10.1055/s-0042-114038
Review
© Georg Thieme Verlag KG Stuttgart · New York

Accelerated Skeletal Maturation in Disorders of Retinoic Acid Metabolism: A Case Report and Focused Review of the Literature

Autoren

  • O. Nilsson

    1   Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
    2   Center for Molecular Medicine and Pediatric Endocrinology Unit, Department of Women’s and Children’s Health, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden

  • N. Isoherranen

    3   Department of Pharmaceutics School of Pharmacy, University of Washington, Seattle, WA, USA

  • M. H. Guo

    4   Program in Biological and Biomedical Sciences, Harvard Medical School, Boston, MA, USA
    5   Department of Genetics, Harvard Medical School, Boston, MA, USA
    6   Program in Medical and Population Genetics, Broad Institute, Cambridge, MA, USA

  • J. C. Lui

    1   Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA

  • Y. H. Jee

    1   Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA

  • I. Guttmann-Bauman

    7   Harold Schnitzer Diabetes Health Center, Oregon Health and Science University, Portland, OR, USA

  • C. Acerini

    8   Department of Paediatrics, University of Cambridge, Cambridge, UK

  • W. Lee

    9   Department of Ophthalmology, Columbia University, New York, NY, USA

  • R. Allikmets

    9   Department of Ophthalmology, Columbia University, New York, NY, USA
    10   Department of Pathology and Cell Biology, Columbia University, New York, NY, USA

  • J. A. Yanovski

    1   Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA

  • A. Dauber

    11   Cincinnati Center for Growth Disorders, Division of Endocrinology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA

  • J. Baron

    1   Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
Weitere Informationen

Publikationsverlauf

received 09. April 2016

accepted 25. Juli 2016

Publikationsdatum:
02. September 2016 (online)

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Abstract

Nutritional excess of vitamin A, a precursor for retinoic acid (RA), causes premature epiphyseal fusion, craniosynostosis, and light-dependent retinopathy. Similarly, homozygous loss-of-function mutations in CYP26B1, one of the major RA-metabolizing enzymes, cause advanced bone age, premature epiphyseal fusion, and craniosynostosis. In this paper, a patient with markedly accelerated skeletal and dental development, retinal scarring, and autism-spectrum disease is presented and the role of retinoic acid in longitudinal bone growth and skeletal maturation is reviewed. Genetic studies were carried out using SNP array and exome sequencing. RA isomers were measured in the patient, family members, and in 18 age-matched healthy children using high-performance liquid chromatography coupled to tandem mass spectrometry. A genomic SNP array identified a novel 8.3 megabase microdeletion on chromosome 10q23.2–23.33. The 79 deleted genes included CYP26A1 and C1, both major RA-metabolizing enzymes. Exome sequencing did not detect any variants that were predicted to be deleterious in the remaining alleles of these genes or other known retinoic acid-metabolizing enzymes. The patient exhibited elevated plasma total RA (16.5 vs. 12.6±1.5 nM, mean±SD, subject vs. controls) and 13-cisRA (10.7 nM vs. 6.1±1.1). The findings support the hypothesis that elevated RA concentrations accelerate bone and dental maturation in humans. CYP26A1 and C1 haploinsufficiency may contribute to the elevated retinoic acid concentrations and clinical findings of the patient, although this phenotype has not been reported in other patients with similar deletions, suggesting that other unknown genetic or environmental factors may also contribute.

Key words

retinoic acid - bone age - growth plate - growth

Supporting Information