ArticleJournal of veterinary internal medicine2026
Neuron-specific enolase enzymatic activity as a biomarker to discriminate neurologic and orthopedic gait abnormalities in dogs.
Article in Journal of veterinary internal medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe glycolytic enzyme neuron-specific enolase (NSE) shows high expression in neurons, generating interest as a diagnostic biomarker for neurologic diseases. However, assays measuring NSE protein concentration (NSE-p) have yielded inconsistent diagnostic results. HYPOTHESIS/
objectivesThis was an observational study to investigate NSE enzymatic activity (NSE-a) as a biomarker in dogs to distinguish neurologic vs musculoskeletal causes of gait abnormalities. We hypothesized that NSE-a would be superior to NSE-p for detecting neurologic conditions. ANIMALS: Client-owned dogs presenting with gait abnormalities were enrolled as: (1) neurology service (n = 10), (2) orthopedic surgery and sports medicine and rehabilitation (SMR) (n = 21), and (3) control dermatology patients without gait abnormalities (n = 3). Inclusion required clinical examination by diplomates or residents of the relevant service and confirmed diagnoses based on radiography, ultrasonography, computed tomography, and magnetic resonance imaging.
methodsSerum NSE-p was measured using validated commercial ELISA kits for use in dogs. Plasma NSE-a was quantified using an NSE functional activity assay (NSE-FA, TETmedical). A secondary experiment compared the techniques using plasma samples from dogs with neurological gait abnormalities.
resultsNeurologic dogs showed significantly increased plasma NSE-a (median, 0.372; IQR, 0.274-0.407) compared with orthopedic and SMR dogs (median, 0.212; IQR, 0.154-0.259; P = .001) and controls (median, 0.218; IQR, 0.15-0.226; P = .03). Direct comparison indicated that NSE-p fell below detection thresholds whereas NSE-a remained measurable. CONCLUSIONS AND CLINICAL IMPORTANCE: Our results suggest that NSE-a is superior to NSE-p for differentiating neurologic from musculoskeletal gait abnormalities. Future research should explore its potential as a point-of-care biomarker for patients with suspected neurologic conditions.
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