Article ; Online: Plasma metabolomic profile changes in females with phenylketonuria following a camp intervention.
The American journal of clinical nutrition
2021 Volume 115, Issue 3, Page(s) 811–821
Abstract: Background: There remains a limited understanding of the metabolic perturbations, beyond phenylalanine (Phe) metabolism, that contribute to phenotypic variability in phenylketonuria (PKU).: Objectives: This study aimed to characterize changes in the ... ...
Abstract | Background: There remains a limited understanding of the metabolic perturbations, beyond phenylalanine (Phe) metabolism, that contribute to phenotypic variability in phenylketonuria (PKU). Objectives: This study aimed to characterize changes in the PKU plasma metabolome following a 5-d metabolic camp intervention and to compare PKU profiles with those of matched healthy controls. Methods: In 28 females (aged 12-57 y), fasting plasma samples were collected on the first (day 1) and final (day 5) days of camp to measure metabolic control and to complete untargeted metabolomic profiling. Three-day dietary records were collected to assess changes in dietary adherence and composition. Univariate (Wilcoxon signed-rank and Mann-Whitney U test) and multivariate (random forest, hierarchical clustering) analyses were performed to identify clinical and metabolic features that were associated with the intervention and disease state. Results: Relative to healthy controls, Phe catabolites, ketones, and carnitine- and glycine-conjugated fatty acids were elevated in females with PKU at baseline, whereas fatty acylcholine metabolites were substantially lower. After the camp intervention, plasma Phe concentrations decreased [median change: -173 µmol/L (IQR: -325, -28 µmol/L)] and 70% of PKU participants demonstrated improved dietary adherence by decreasing Phe intake and/or increasing medical food consumption. This was accompanied by a shift in abundance for 223 metabolites (q < 0.05). Compounds associated with the metabolism of Phe, fatty acids, and choline contributed most to profile differences between camp days 1 and 5. Conclusions: In females with PKU, untargeted metabolomics identified prominent perturbations in amino acid and lipid metabolites associated with bioenergetic impairment and oxidative stress. Choline-conjugated lipids could have fundamental roles in these pathways and they have not been previously evaluated in PKU. A short-term camp intervention was effective for improving or fully normalizing the abundance of the identified discriminatory metabolites. |
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MeSH term(s) | Carnitine ; Choline ; Fatty Acids ; Female ; Humans ; Male ; Metabolomics ; Phenylketonurias |
Chemical Substances | Fatty Acids ; Choline (N91BDP6H0X) ; Carnitine (S7UI8SM58A) |
Language | English |
Publishing date | 2021-12-03 |
Publishing country | United States |
Document type | Journal Article ; Research Support, N.I.H., Extramural |
ZDB-ID | 280048-2 |
ISSN | 1938-3207 ; 0002-9165 |
ISSN (online) | 1938-3207 |
ISSN | 0002-9165 |
DOI | 10.1093/ajcn/nqab400 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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