Factors associated with insulin responses to oral sugars in a mixed-breed cohort of ponies.
Authors: Knowles Edward J, Harris Patricia A, Elliott Jonathan, Chang Yu-Mei, Menzies-Gow Nicola J
Journal: Equine veterinary journal
Summary
# Editorial Summary Identifying ponies at risk of laminitis through insulin dysregulation requires reliable screening methods, and the 60-minute serum insulin response during an oral sugar test (InsulinT60) has emerged as a useful predictor of both future laminitic episodes and metabolic dysfunction. Knowles and colleagues investigated which physical characteristics, owner observations, and metabolic markers correlate with exaggerated insulin responses in a mixed-breed pony population, aiming to refine clinical assessment protocols and better understand the underlying mechanisms driving pathological insulin responses. The researchers found that specific physical traits and metabolic variables were significantly associated with elevated InsulinT60 values, enabling practitioners to identify higher-risk individuals without necessarily performing full oral sugar testing on every animal. These associations have important implications for targeted screening: farriers and veterinarians can use straightforward clinical observations to prioritise formal metabolic testing in susceptible ponies, whilst the metabolic correlations offer insight into whether insulin dysregulation stems primarily from pancreatic beta-cell hypersensitivity, peripheral insulin resistance, or other endocrine factors. Understanding these relationships helps equine professionals implement more efficient prevention strategies for laminitis, particularly in native and mixed-breed ponies where metabolic disease prevalence remains high.
Read the full abstract on PubMed
Practical Takeaways
- •Oral sugar testing with 60-minute insulin measurement can help identify ponies at risk of laminitis before clinical signs develop, enabling preventive management strategies
- •Simple physical characteristics and owner observations may help veterinarians prioritize which ponies warrant formal insulin dysregulation testing, reducing unnecessary testing
- •Understanding metabolic marker associations with insulin response can guide nutritional and management interventions for at-risk individuals
Key Findings
- •Serum insulin concentration at 60 minutes during oral sugar testing serves as an indicator of future laminitis risk and insulin dysregulation in ponies
- •Physical and owner-reported variables show associations with InsulinT60 responses that may help identify individuals requiring insulin dysregulation testing
- •Metabolic markers correlate with InsulinT60 responses, providing insights into the pathophysiology of insulin dysregulation in equines