Fibrinogen heterogeneity in horses.
Authors: Russell Elise B, Courtman Natalie F, Santos Leilani L, Tennent-Brown Brett S
Journal: Journal of veterinary internal medicine
Summary
# Editorial Summary: Fibrinogen Heterogeneity in Horses Russell Elise B and colleagues have demonstrated that equine fibrinogen exists in multiple molecular weight forms, mirroring observations long established in human medicine. Using gel electrophoresis, Western blotting, and LC-MS/MS analysis on plasma samples from five healthy horses, the researchers identified two distinct fibrinogen fractions with molecular weights of approximately 377 kDa and 318 kDa, corresponding to high and low molecular weight variants respectively. This finding has important implications for clinicians relying on the modified Clauss assay for fibrinogen measurement, as heterogeneous fibrinogen populations can produce variable or artificially skewed results depending on which fraction the assay preferentially detects. Understanding that equine fibrinogen heterogeneity exists suggests that laboratory fibrinogen values should be interpreted with appropriate caution, particularly when tracking coagulation status in critically ill or colic patients where fibrinogen is a key prognostic marker. Further research exploring whether different fibrinogen fractions have distinct functional properties or whether disease states alter the proportion of high versus low molecular weight forms would help refine how we use fibrinogen measurements in equine clinical practice.
Read the full abstract on PubMed
Practical Takeaways
- •Fibrinogen heterogeneity in horses may lead to variable fibrinogen measurements depending on assay method, potentially affecting coagulation assessment in clinical practice
- •Clinicians should be aware that standard fibrinogen measurements may not capture the complete fibrinogen profile in equine patients
- •Further research needed to determine if fibrinogen heterogeneity has clinical implications for equine hemorrhage, thrombosis, or coagulation disorders
Key Findings
- •Two fibrinogen fractions identified in equine plasma with molecular weights of approximately 377 kDa (high molecular weight) and 318 kDa (low molecular weight)
- •Fibrinogen heterogeneity demonstrated through gel electrophoresis, Western blotting, and LC-MS/MS analysis
- •Equine fibrinogen heterogeneity mirrors patterns previously observed in humans and may affect fibrinogen measurement accuracy using the modified Clauss assay