Serum C-reactive Protein and Protein Electrophoretic Pattern Correlated With Age in Horses.
Authors: Arfuso Francesca, Piccione Giuseppe, Guttadauro Alberto, Monteverde Vincenzo, Giudice Elisabetta, Giannetto Claudia
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Age-Related Inflammation in Horses Chronic, low-grade inflammation—termed "inflammaging"—underpins many age-related pathologies, yet its biochemical markers in horses remain poorly characterised. Arfuso and colleagues examined serum C-reactive protein (CRP) and protein electrophoretic patterns across thirty Italian Saddle horses stratified by age: young (2–4 years), middle-aged (7–10 years), and older (15–20 years), analysing acute phase response markers and plasma protein fractions from blood samples. Significant age-related increases emerged in CRP, α₁-globulin and α₂-globulin concentrations (P < 0.001), whilst albumin levels and the albumin:globulin ratio declined substantially in middle-aged and older horses compared to younger animals. These findings demonstrate a progressive shift towards an acute phase response phenotype with advancing age, with α-globulin fractions—which encompass multiple acute phase proteins beyond CRP alone—appearing particularly sensitive to this inflammatory trajectory. For practitioners, these results suggest that inflammatory biomarkers may prove valuable for assessing physiological aging status and identifying horses at heightened risk of age-related disease, though the authors appropriately flag the need for broader acute phase protein profiling to clarify which specific inflammatory markers best characterise equine inflammaging and inform preventative management strategies in aging populations.
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Practical Takeaways
- •Older horses (7+ years) show biochemical markers of chronic low-grade inflammation; baseline serum protein profiles may differ by age group and should be interpreted accordingly in clinical assessment
- •Elevated acute phase proteins in aging horses may reflect natural inflammatory aging processes rather than active disease; contextualizing inflammatory markers with age is important for clinical interpretation
- •Further investigation of acute phase proteins beyond CRP in older horses could help identify specific inflammatory biomarkers relevant to age-related performance decline or health issues
Key Findings
- •C-reactive protein (CRP) increased significantly with age across three groups (2-4, 7-10, 15-20 years; P < 0.001)
- •α1- and α2-globulin fractions showed age-related increases (P < 0.001), indicating elevated acute phase response in older horses
- •Albumin and albumin:globulin ratio were significantly lower in horses aged 7+ years compared to 2-4 year-old horses (P < 0.001)
- •Age demonstrated negative correlation with albumin levels and positive correlation with CRP and α-globulin concentrations