Mapping Tryptophan Metabolites in Mice
Author Information
Author(s): Perez-Castro Lizbeth, Nawas Afshan F., Kilgore Jessica A., Garcia Roy, Lafita-Navarro M.Carmen, Acosta Paul H., Nogueira Pedro A. S., Williams Noelle S., Conacci-Sorrell Maralice
Primary Institution: University of Texas Southwestern Medical Center
Hypothesis
How are tryptophan and its metabolites distributed across different tissues, sexes, and ages in mice?
Conclusion
The study found significant variations in tryptophan metabolism based on tissue type, sex, and age, with higher levels of certain metabolites in aging males.
Supporting Evidence
- Significant tissue-, sex-, and age-specific variations in tryptophan metabolism were observed.
- Higher levels of oncometabolites I3P and Kyn were found in aging males.
- Trp levels were highest in the liver, kidney, and spleen.
- Serotonin and its precursor 5-HTP were most prevalent in circulation.
- Metabolite presence in certain tissues may indicate their functional importance.
Takeaway
This study looked at how a substance called tryptophan is used in different parts of mice's bodies and how it changes as they grow older and between boys and girls.
Methodology
The study used LC-MS/MS to quantify 17 tryptophan catabolites across various tissues in male and female C57BL/6 mice at different ages.
Potential Biases
Potential bias in the interpretation of results due to the focus on specific metabolites and their known associations with diseases.
Limitations
The study primarily focused on a single mouse strain and did not explore the dynamic conversion rates of tryptophan into its metabolites.
Participant Demographics
C57BL/6 mice, both male and female, at three life stages: young (3 weeks), adult (54 weeks), and aged (74 weeks).
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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