Plasma metabolome of healthy and Rhodococcus equi-infected foals over time.

Autor: Sanclemente JL; Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, USA., Rivera-Velez SM; Molecular Determinants Core, Johns Hopkins All Children's Hospital, St Petersburg, Florida, USA., Horohov DW; Maxwell H. Gluck Equine Research Center, Department of Veterinary Clinical Sciences, University of Kentucky, Lexington, Kentucky, USA., Dasgupta N; Department of Mathematics and Statistics, College of Arts and Sciences, Washington State University, Pullman, Washington, USA., Sanz MG; Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, USA.
Jazyk: angličtina
Zdroj: Equine veterinary journal [Equine Vet J] 2023 Sep; Vol. 55 (5), pp. 831-842. Date of Electronic Publication: 2022 Nov 03.
DOI: 10.1111/evj.13894
Abstrakt: Background: Foals that develop pulmonary ultrasonographic lesions on Rhodococcus equi (R. equi) endemic farms are treated with antibiotics because those at risk of developing clinical pneumonia (~20%) cannot be recognised early. Candidate biomarkers identified using metabolomics may aid targeted treatment strategies against R. equi.
Objectives: (1) To describe how foal ageing affects their plasma metabolome (birth to 8 weeks) and (2) to establish the effects that experimental infection with Rhodococcus equi (R. equi) has on foal metabolome.
Study Design: Experimental study.
Methods: Nine healthy newborn foals were experimentally infected with R. equi as described in a previous study. Foals were treated with oral antibiotics if they developed clinical pneumonia (n = 4, clinical group) or remained untreated if they showed no signs of disease (n = 5, subclinical group). A group of unchallenged foals (n = 4) was also included in the study. By the end of the study period (8 weeks), all foals were free of disease. This status was confirmed with transtracheal wash fluid evaluation and culture as well as thoracic ultrasonography. Plasma metabolomics was determined by GC-MS weekly for the study duration (8 weeks).
Results: Foals' plasma metabolome was altered by ageing (birth to 8 weeks) and experimental infection with R. equi as demonstrated using multivariate statistical analysis. The intensities of 25 and 28 metabolites were altered by ageing and infection (p < 0.05) respectively. Furthermore, 20 metabolites changed by more than 2-fold between clinical and subclinical groups.
Main Limitations: The number of foals is limited. Foals were experimentally infected with R. equi.
Conclusions: Ageing and R. equi infection induced changes in the plasma metabolome of foals. These results provide an initial description of foal's plasma metabolome and serve as background for future identification of R. equi pneumonia biomarkers.
(© 2022 EVJ Ltd.)
Databáze: MEDLINE
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