Abstract
Background/Objectives:
Nutritional deficiencies are frequently observed when treating patients with inborn errors of metabolism due to an unbalanced diet. Thus far, patients with isovaleric acidemia (IVA) who adhere to a restricted protein diet have not been investigated in this respect. We hypothesize that these patients may have a polyunsaturated fatty acid (PUFA) deficiency, leading to potential clinical complications.
Subjects/Methods:
We examined the nutritional status by reporting on potential deficiencies in PUFAs in treated IVA patients. A general clinical chemistry work-up as well as gas chromatography flame ionization detector analysis was performed to determine PUFAs in the plasma of 10 IVA patients.
Results:
The general clinical chemistry tests did not indicate severe hematological abnormalities or nutritional insufficiencies. We identified a significant reduction in plasma PUFA levels, especially in omega-3 (all acids, P<0.001) and omega-6 (in particular 20:3n-6 P<0.0001 and 20:4n-6 P=0.0005) fatty acids. In addition, an elevation in omega-9 fatty acids, with the exception of 20:3n-9 and C22:1n-9, was not suggestive of complete essential fatty acid deficiency but rather indicative of isolated and/or combined omega-3 and omega-6 fatty acid depletion.
Conclusions:
This study emphasizes the potential nutritional insufficiencies that may occur because of therapeutic intervention in IVA.
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Acknowledgements
This study was financially supported as a Carolina MacGillavry PhD Fellowship awarded by ‘Koninklijke Nederlandse Akademie van Wetenschappen’ to assist in research in Isovaleric acidemia. We thank the staff at the Laboratory Genetic Metabolic Diseases (GMDs) at the Academic Medical Center, University of Amsterdam, for their expert advice and assistance. The study was also made possible with the logistical, scientific and statistical contribution of the staff of Human Metabolomics and Wilma Breytenbach, the statistical consultant at the North-West University in Potchefstroom, South Africa. We are grateful to the patients and their families for participation in this study. Data presented at ICIEM 2013 and Submitted for publication.
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Dercksen, M., Kulik, W., Mienie, L. et al. Polyunsaturated fatty acid status in treated isovaleric acidemia patients. Eur J Clin Nutr 70, 1123–1126 (2016). https://doi.org/10.1038/ejcn.2016.100
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DOI: https://doi.org/10.1038/ejcn.2016.100
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