Inflammatory markers for differentiation of endometritis in the mare.
Equine Vet J
; 56(4): 678-687, 2024 Jul.
Article
em En
| MEDLINE
| ID: mdl-38219734
ABSTRACT
BACKGROUND:
Endometrial biopsy is required to diagnose mares with chronic endometritis and endometrial degenerative fibrosis. An increase in understanding of equine reproductive immunology could be utilised to create less-invasive, time-efficient diagnostic tools especially when evaluating mares for chronic endometritis.OBJECTIVES:
To evaluate inflammatory cytokine and chemokine concentrations in uterine fluid samples collected by low-volume lavage (LVL) as a potential screening diagnostic biomarker for endometritis. STUDYDESIGN:
Prospective cross-sectional clinical study.METHODS:
Forty-six mares underwent a LVL and subsequently endometrial biopsy. Mares were split in three groups healthy, acute endometritis, and chronic endometrial fibrosis (CEF) based on cytological and histological evaluation. A fluorescent bead-based multiplex assay for IFN-γ, IFN-α, IL-1ß, IL-4, IL-10, IL-17, sCD14, TNF-α, CCL2, CCL3, CCL5 and CCL11 were carried out on the LVL fluid. The endometrial biopsy was utilised for histology and qPCR of IFN-γ, IL-1ß, IL-6, IL-8, IL-17, TNF-α, CCL2 and CCL3 genes. Statistical analyses examined differences in inflammatory markers and predictive modelling for diseased endometrium.RESULTS:
Secreted concentrations of IFN-γ were lower in LVL fluid from reproductively healthy mares compared with acute endometritis (p = 0.04) and CEF (p = 0.006). Additionally, IL-17, IL-10, IL-1ß, TNF-α, CCL2, CCL3, CCL5 and CCL11 were significantly increased (p ≤ 0.04) in LVL from CEF mares compared with healthy mares. Mares with CCL2 concentrations ≥550 pg/mL (14/14) had 100% probability of having CEF and/or acute endometritis. Healthy mares had lower relative abundance of IL-17 mRNA compared with mares in CEF group [median (interquartile rage) = 14.76 (13.3, 15.3) and 12.4 (10.54, 13.81)], respectively (p = 0.02). MAINLIMITATIONS:
Limited sample size larger numbers of mares with and without endometritis are required and reference intervals in LVL samples have to be established.CONCLUSIONS:
Inflammatory chemokines and cytokines concentrations differed between healthy mares and mares with acute endometritis or CEF in LVL.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Biomarcadores
/
Citocinas
/
Endometrite
/
Doenças dos Cavalos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article