Platelet-Rich Plasma Proteome of Mares Susceptible to Persistent-Breeding-Induced Endometritis Differs from Resistant Mares.
Authors: Novello Guilherme, Souza Fabiana F, Canisso Igor F
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary Persistent-breeding-induced endometritis (PBIE) represents a significant reproductive challenge in mares, and whilst platelet-rich plasma (PRP) has demonstrated clinical promise in managing this condition, the biological mechanisms underpinning its effectiveness—particularly in mares with differing susceptibility profiles—remain poorly understood. Researchers compared the protein composition of PRP from seven PBIE-susceptible and five PBIE-resistant mares using mass spectrometry proteomics analysis, identifying 105 proteins present across all samples, with four proteins significantly elevated in resistant mares: apolipoprotein C-II, serpin family G member 1, protection of telomeres protein 1, and non-specific serine/threonine protein kinase. Notably, susceptible mares demonstrated higher baseline platelet concentrations (768 ± 395 × 10³) compared to resistant animals (561 ± 152 × 10³), suggesting that quantity of platelets alone may not correlate with therapeutic benefit. The four differentially abundant proteins identified in resistant mares are all linked to immune regulation and cellular stress response, implying that PRP efficacy in treating PBIE may depend on the quality of the immune-modulating factors present rather than platelet numbers alone. For practitioners considering PRP therapy in reproductively compromised mares, these findings suggest potential value in characterising a mare's innate immune capacity before treatment, though in vivo validation studies are essential before clinical application of such phenotyping approaches.
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Practical Takeaways
- •PRP sourced from mares with histories of PBIE resistance may be more therapeutically effective than PRP from susceptible mares due to enhanced immune-related protein profiles
- •Platelet count alone does not distinguish PRP quality; protein composition analysis may be needed to optimize PRP selection for treating PBIE in recipient mares
- •This foundational proteomics work requires follow-up clinical trials before changing current PRP procurement or treatment protocols
Key Findings
- •Platelet counts differed significantly between resistant (561 ± 152 × 10³) and susceptible mares (768 ± 395 × 10³) with PBIE susceptibility
- •Four proteins were significantly more abundant in resistant mares: apolipoprotein C-II, serpin family G member 1, protection of telomeres protein 1, and non-specific serine/threonine protein kinase
- •All four differentially abundant proteins are linked to immune response pathways
- •PRP proteome differences suggest resistant mares may provide more beneficial PRP for PBIE treatment, pending in vivo validation