1. Adult diagnosis of congenital serine biosynthesis defect: A treatable cause of progressive neuropathy
- Author
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Carlos Ferreira, William A. Gahl, Kelly A. King, Ariane Soldatos, Ellen Macnamara, Tanya J. Lehky, Monique C King, Sarah Debs, Edward W. Cowen, H. Jeffrey Kim, Melissa A. Merideth, Catherine Groden, C.M. Owen, Laura H Brown, and Camilo Toro
- Subjects
Adult ,0301 basic medicine ,Limb Deformities, Congenital ,030105 genetics & heredity ,Bioinformatics ,Compound heterozygosity ,Article ,Congenital Abnormalities ,Serine ,03 medical and health sciences ,Seizures ,Exome Sequencing ,Genetics ,medicine ,Humans ,Transaminases ,Genetics (clinical) ,Exome sequencing ,Muscle contracture ,Sphingolipids ,Fetal Growth Retardation ,Ichthyosis ,business.industry ,Neurodegeneration ,medicine.disease ,Phenotype ,Sphingolipid ,030104 developmental biology ,Child, Preschool ,Microcephaly ,Female ,Psychomotor Disorders ,business - Abstract
A woman with ichthyosis, contractures, and progressive neuropathy represents the first case of phosphoserine aminotransferase deficiency diagnosed and treated in an adult. She has novel compound heterozygous mutations in the gene PSAT1. Treatment with high dose oral L-serine completely resolved the ichthyosis. Consideration of this diagnosis is important because early treatment with L-serine repletion can halt progression of neurodegeneration and potentially improve neurological disabilities. As exome sequencing becomes more widely implemented in the diagnostic evaluation of progressive neurodegenerative phenotypes, adult neurologists and geneticists will increasingly encounter later onset manifestations of inborn errors of metabolism classically considered in infancy and early childhood.
- Published
- 2021
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