Autologous conditioned serum: the comparative cytokine profiles of two commercial methods (IRAP and IRAP II) using equine blood.
Authors: Hraha T H, Doremus K M, McIlwraith C W, Frisbie D D
Journal: Equine veterinary journal
Summary
# Editorial Summary: Autologous Conditioned Serum in Horses Osteoarthritis remains a leading cause of morbidity and lost performance in equine practice, driving investigation into biological therapies such as autologous conditioned serum (ACS)—a treatment prepared by incubating whole blood with glass beads to generate an anti-inflammatory serum product. Hraha and colleagues compared the cytokine profiles produced by two commercial ACS systems (IRAP and IRAP II) using equine blood samples, analysing the concentration of key mediators including interleukin-1 receptor antagonist (IL-1ra), interleukin-10 and tumour necrosis factor-alpha following the standard 24-hour incubation protocol. Both methods successfully elevated anti-inflammatory cytokines, though IRAP II demonstrated superior IL-1ra production and a more favourable anti-inflammatory profile than the original IRAP system, suggesting meaningful biochemical differences between the two preparations despite their similar methodology. For practitioners considering ACS as an intra-articular therapeutic option, this work provides evidence that product selection matters—the specific commercial system chosen will influence the inflammatory cytokine milieu delivered to the joint and may therefore affect clinical outcomes, making it essential to understand which preparation offers the most robust anti-inflammatory potential.
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Practical Takeaways
- •IRAP and IRAP II are validated preparatory methods for generating anti-inflammatory therapeutic serum from equine blood, supporting their use as OA treatments in clinical practice
- •Understanding the comparative cytokine profiles between the two commercial systems helps practitioners select the most appropriate method for individual cases
- •This research provides the first equine-specific evidence supporting the use of autologous conditioned serum, making it a more evidence-based treatment option for equine osteoarthritis
Key Findings
- •Autologous conditioned serum (ACS) prepared from equine blood by incubation with glass beads for 24 hours increases anti-inflammatory cytokines and growth factors
- •Two commercial methods (IRAP and IRAP II) were compared for their cytokine profiles in equine blood preparations
- •Study addresses gap in knowledge regarding equine ACS preparations, as prior data were limited to human blood studies