Untargeted Metabolomic Analysis Reveals Plasma Differences between Mares with Endometritis and Healthy Ones.
Authors: Zhang Xijun, Gao Yujin, Mai Zhanhai, Li Yina, Wang Jiamian, Zhao Xingxu, Zhang Yong
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary: Plasma Metabolites as Diagnostic Markers for Equine Endometritis Researchers used untargeted metabolomics to characterise biochemical differences between mares with clinical endometritis and healthy controls, aiming to identify non-invasive diagnostic biomarkers for this reproductive condition. Eight affected mares (diagnosed via clinical assessment and laboratory confirmation) and eight healthy controls were analysed using liquid chromatography-tandem mass spectrometry, a sensitive technique that simultaneously measures hundreds of metabolites in plasma samples. Ten metabolites emerged as potential diagnostic indicators: seven were significantly reduced in endometritis cases (including oleoyl ethanolamide, 12,13-dihydroxy octadecenoic acid, and deoxycholic acid 3-glucuronide), whilst three were elevated (adenosine 5'-monophosphate, 5-hydroxytryptophan, and l-formylkynurenine), with these alterations predominantly reflecting dysregulation in tryptophan metabolism and lipid-derived signalling pathways. For equine practitioners, these findings suggest that a targeted plasma metabolite panel could offer a rapid, repeatable diagnostic tool superior to conventional endometritis screening, potentially facilitating earlier intervention and improving reproductive management in breeding programmes. Whilst the small sample size warrants validation in larger populations and across different mare ages and reproductive states, this metabolomic signature may ultimately enable point-of-care testing that reduces reliance on invasive endometrial sampling.
Read the full abstract on PubMed
Practical Takeaways
- •These metabolite biomarkers could potentially provide a non-invasive blood test for diagnosing endometritis in mares, reducing reliance on endoscopic examination
- •Understanding the metabolic signature of endometritis (particularly in tryptophan and lipid metabolism) may inform future therapeutic approaches targeting inflammatory pathways
- •The identified metabolite panel warrants validation in larger populations before clinical implementation as a diagnostic tool
Key Findings
- •28 differentially abundant metabolites identified between mares with endometritis and healthy controls using LC-MS/MS metabolomics
- •10 metabolites identified as potential biomarkers, with 7 decreased (including hexadecanedioic acid, OEA, 12,13-diHOME, DCA-3G) and 3 increased (AMP, 5-HTP, l-formylkynurenine) in endometritis group
- •Dysregulated metabolites primarily participate in tryptophan metabolism, linolenic acid metabolism, and fat/energy metabolism
- •Metabolomic profiling may enable non-invasive diagnosis of mare endometritis through specific biomarker detection