Dynamic expression of leukocyte innate immune genes in whole blood from horses with lipopolysaccharide-induced acute systemic inflammation.
Authors: Vinther Anne Mette L, Skovgaard Kerstin, Heegaard Peter M H, Andersen Pia H
Journal: BMC veterinary research
Summary
# Editorial Summary: Leukocyte Gene Expression in Equine Endotoxaemia Understanding the molecular mechanisms underpinning acute systemic inflammation in horses remains crucial for improving outcomes in high-mortality conditions like sepsis and systemic inflammatory response syndrome (SIRS), yet our knowledge of the innate immune response dynamics is surprisingly limited. Researchers induced acute systemic inflammation in six horses via intravenous LPS challenge (1 µg/kg bodyweight) and tracked expression of 31 leukocyte immune genes across 24 hours using quantitative real-time PCR, collecting 16 blood samples per animal at predetermined intervals to map temporal gene activation patterns. The study identified significant, time-dependent upregulation and downregulation of key immune genes, revealing distinct expression kinetics that characterise the early inflammatory cascade and may help distinguish normal immune activation from pathological dysregulation. These findings provide a molecular framework for developing improved diagnostic markers and potential therapeutic targets in equine endotoxaemia and sepsis, whilst the documented gene expression timeline could inform clinical monitoring strategies and help practitioners identify horses at risk of severe systemic complications. The work underscores the value of transcriptomic approaches in translating immunological mechanisms into practical clinical tools for this high-risk patient population.
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Practical Takeaways
- •Understanding the temporal dynamics of immune gene expression in acute systemic inflammation may support future development of improved diagnostic markers for SIRS and sepsis in horses
- •Blood-based immune gene expression profiling could potentially help differentiate systemic inflammatory states and guide therapeutic intervention timing
- •This foundational work identifies candidate genes for monitoring equine innate immune response in acute clinical conditions
Key Findings
- •31 leukocyte innate immune genes were monitored in horses receiving LPS injection at 1 µg/kg body weight over a 24-hour period
- •Gene expression patterns were characterized using reverse transcription quantitative real-time PCR across 16 blood samples per horse at predetermined intervals
- •Study identified significantly regulated genes and their dynamic expression patterns during acute systemic inflammation in equine models