Diagnostic and Therapeutic Monitoring for Neurometabolic Disorders

A special issue of Metabolites (ISSN 2218-1989). This special issue belongs to the section "Endocrinology and Clinical Metabolic Research".

Deadline for manuscript submissions: closed (15 December 2023) | Viewed by 1398

Special Issue Editors


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Guest Editor
Center for Bioethics and Humanities, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
Interests: organic acidurias; disorders of B6 metabolism

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Guest Editor
Center for Molecular Medicine, University Medical Center Utrecht, Utrecht, The Netherlands
Interests: metabolomics; diagnostics; malate aspartate shuttle; red blood cell metabolism
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Special Issue Information

Dear Colleagues,

Neurometabolic disorders are a heterogenous group of conditions that result in neurological disease sequala, ranging from developmental delays to complex movement disorders and epilepsy. These conditions are often progressive and can be debilitating, highlighting the need for early diagnoses and improved treatment options. Diagnostic biomarkers are needed for many of these rare conditions, where clinical diagnosis may go unrecognized. Neurometabolic disorders are traditionally thought of as genetic conditions that result in the accumulation of abnormal metabolites which are often claimed to be neurotoxic. A growing number of therapeutic strategies have aimed to reduce these accumulating metabolites. Biomarkers which can augment genotype–phenotype correlations are critical to determine which patients benefit from treatment. Importantly, biomarkers associated with therapeutic monitoring are often lacking clinical trial endpoints.

In this Special Issue of Metabolites, we welcome proposals on, but not limited to, the following topics:

  • Targeted and untargeted metabolomics in neurometabolic disorders;
  • Biomarker discovery and validation for the diagnosis of neurometabolic disorders;
  • Genotype–phenotype correlations with biomarkers in patients with neurometabolic disorders;
  • Therapeutic monitoring for patients with neurometabolic disorders.

Dr. Curtis R. Coughlin II
Dr. J.J.M. (Judith) Jans
Guest Editors

Manuscript Submission Information

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Keywords

  • neurometabolic disorders
  • inborn errors of metabolism
  • metabolomics
  • biomarker discovery
  • therapeutic monitoring
  • genotype–phenotype correlation

Published Papers (1 paper)

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Research

12 pages, 2625 KiB  
Article
Metabolic Alterations in NADSYN1-Deficient Cells
by Nils W. F. Meijer, Johan Gerrits, Susan Zwakenberg, Fried J. T. Zwartkruis, Nanda M. Verhoeven-Duif and Judith J. M. Jans
Metabolites 2023, 13(12), 1196; https://doi.org/10.3390/metabo13121196 - 12 Dec 2023
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Abstract
NAD synthetase 1 (encoded by the gene NADSYN1) is a cytosolic enzyme that catalyzes the final step in the biosynthesis of nicotinamide adenine dinucleotide (NAD+) from tryptophan and nicotinic acid. NADSYN1 deficiency has recently been added to the spectrum of congenital NAD+ deficiency [...] Read more.
NAD synthetase 1 (encoded by the gene NADSYN1) is a cytosolic enzyme that catalyzes the final step in the biosynthesis of nicotinamide adenine dinucleotide (NAD+) from tryptophan and nicotinic acid. NADSYN1 deficiency has recently been added to the spectrum of congenital NAD+ deficiency disorders. To gain insight into the metabolic consequences of NADSYN1 deficiency, the encoding gene was disrupted in A549 and HEK293T cells, and the metabolome was profiled in the presence of different NAD+ precursors, including tryptophan, nicotinamide and nicotinic acid. We demonstrate that when precursors of the NAD+ salvage pathway in the form of nicotinamide become limiting, NADSYN1 deficiency results in a decline in intracellular NAD+ levels even in the presence of other potential NAD+ sources such as tryptophan and nicotinic acid. As a consequence, alterations in 122 and 69 metabolites are observed in NADSYN1-deficient A549 and HEK293T cells compared to the wild-type cell line (FC > 2 and p < 0.05). We thus show that NADSYN1 deficiency results in a metabolic phenotype characterized by alterations in glycolysis, the TCA cycle, the pentose phosphate pathway, and the polyol pathway. Full article
(This article belongs to the Special Issue Diagnostic and Therapeutic Monitoring for Neurometabolic Disorders)
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