The effect of exercise on cytokine concentration in equine autologous conditioned serum.
Authors: Hale Josephine N, Hughes Kristopher J, Hall Sarah, Labens Raphael
Journal: Equine veterinary journal
Summary
# Editorial Summary: Exercise Timing and Autologous Conditioned Serum Efficacy Autologous conditioned serum (ACS) is widely used for intra-articular management of osteoarthritis in performance horses, yet optimal timing for blood collection relative to exercise remains unclear. This 2023 study examined how a single bout of exhaustive exercise influenced the cytokine profile in non-commercial ACS production, collecting blood from eight Standardbred horses immediately before exercise, then at 1 hour and 24 hours post-exertion, with fluorescent microsphere immunoassay used to quantify key inflammatory mediators. The findings revealed a clinically significant reduction in the anti-inflammatory cytokine IL-1Ra (from a baseline median of 7349 pg/ml to 584 pg/ml at 1 hour; P = 0.004) alongside a simultaneous rise in the pro-inflammatory cytokine TNF-α at the 1-hour mark, whilst IL-10 and IL-1β remained unchanged across all timepoints. These results suggest practitioners should delay blood collection for ACS production by at least 24 hours following intense exercise, as harvesting within 1 hour may compromise the therapeutic anti-inflammatory capacity of the final product—a practical consideration particularly relevant during competition seasons when blood draws must be timed strategically around training schedules.
Read the full abstract on PubMed
Practical Takeaways
- •Blood collection for ACS production should be delayed at least 24 hours after intense exercise to optimize the anti-inflammatory cytokine profile of the final product
- •Exhaustive exercise acutely reduces the therapeutic anti-inflammatory potential of non-commercial ACS preparations through decreased IL-1Ra and increased TNF-α
- •Timing of blood collection significantly affects ACS quality in equine intra-articular therapy for osteoarthritis management
Key Findings
- •IL-1Ra concentration decreased significantly 1 hour post-exercise (median 584.4 pg/ml vs baseline 7349 pg/ml, p=0.004)
- •TNF-α concentration increased 1 hour post-exercise (11.92 pg/ml vs baseline 11.16 pg/ml, p=0.05)
- •IL-10 and IL-1β showed no significant changes across time points
- •Cytokine composition shifts toward pro-inflammatory profile 1 hour post-exercise but recovers by 24 hours