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Neuron-specific enolase enzymatic activity as a biomarker to discriminate neurologic and orthopedic gait abnormalities in dogs.
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Huynh Amy, Byron Michael J, Lenfest Margret I, Mukhtarov Furkat, Yasmin Rubina, Cohen Roy, Rishniw Mark, Travis Alexander J, Merbl Yael
Аннотация
BACKGROUND: The 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/OBJECTIVES: This 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.
METHODS: Serum 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.
RESULTS: Neurologic 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.
HYPOTHESIS/OBJECTIVES: This 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.
METHODS: Serum 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.
RESULTS: Neurologic 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.