Ritz, Jacqueline; Wunderle, Carla; Stumpf, Franziska; Laager, Rahel; Tribolet, Pascal; Neyer, Peter; Bernasconi, Luca; Stanga, Zeno; Mueller, Beat; Schuetz, Philipp (2024). Association of tryptophan pathway metabolites with mortality and effectiveness of nutritional support among patients at nutritional risk: secondary analysis of a randomized clinical trial. Frontiers in Nutrition, 11(1335242) Frontiers Media 10.3389/fnut.2024.1335242
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Tryptophan is an essential amino acid and is the precursor of many important metabolites and neurotransmitters. In malnutrition, the availability of tryptophan is reduced, potentially putting patients at increased risks. Herein, we investigated the prognostic implications of the tryptophan metabolism in a secondary analysis of the Effect of Early Nutritional Support on Frailty, Functional Outcomes, and Recovery of Malnourished Medical Inpatients Trial (EFFORT), a randomized, controlled trial comparing individualized nutritional support to usual care in patients at risk for malnutrition. Among 238 patients with available measurements, low plasma levels of metabolites were independently associated with 30-day mortality with adjusted hazard ratios (HR) of 1.77 [95% CI 1.05-2.99, p 0.034] for tryptophan, 3.49 [95% CI 1.81-6.74, p < 0.001] for kynurenine and 2.51 [95% CI 1.37-4.63, p 0.003] for serotonin. Nutritional support had more beneficial effects on mortality in patients with high tryptophan compared to patients with low tryptophan levels (adjusted HR 0.61 [95% CI 0.29-1.29] vs. HR 1.72 [95% CI 0.79-3.70], p for interaction 0.047). These results suggest that sufficient circulating levels of tryptophan might be a metabolic prerequisite for the beneficial effect of nutritional interventions in this highly vulnerable patient population.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Endocrinology, Diabetology and Clinical Nutrition |
UniBE Contributor: |
Stanga, Zeno |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2296-861X |
Publisher: |
Frontiers Media |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
04 Mar 2024 16:18 |
Last Modified: |
04 Mar 2024 16:27 |
Publisher DOI: |
10.3389/fnut.2024.1335242 |
PubMed ID: |
38425485 |
Uncontrolled Keywords: |
biomarker kynurenine malnutrition metabolomics nutritional support serotonin tryptophan |
BORIS DOI: |
10.48350/193684 |
URI: |
https://boris.unibe.ch/id/eprint/193684 |
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