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Article Dans Une Revue Equine Veterinary Journal Année : 2012

Serum concentration of surfactant protein D in horses with lower airway inflammation

Eric Richard
U. Christmann
  • Fonction : Auteur
Stéphane Pronost

Résumé

Reasons for performing study: Surfactant protein D (SP-D), mainly synthesised by alveolar type II cells and nonciliated bronchiolar cells, is one important component of innate pulmonary immunity. In man, circulating concentrations of SP-D are routinely used as biomarkers for pulmonary injury. To date, serum SP-D levels have only been investigated in horses in an experimental model of bacterial airway infection. Objectives: To compare serum SP-D concentrations at rest and after exercise in horses with and without inflammatory airway disease (IAD). Methods: Venous blood samples were collected from 42 Standardbred racehorses at rest and 60 min after performing a standardised treadmill exercise test. Tracheal wash and bronchoalveolar lavage fluid (BALF) samples were collected after exercise. Based on BALF cytology, 22 horses were defined as IAD-affected and 20 classified as controls. Serum SP-D concentrations were assessed using a commercially available ELISA kit and statistically compared between groups of horses and sampling times. Results: Serum concentrations of SP-D in IAD-affected horses were significantly higher than those of control horses, both at rest and after exercise. Within the IAD-affected group, no significant correlation was found between serum SP-D concentrations and BALF cytology. Within each group of horses (IAD and control), no significant influence of exercise was found on serum SP-D levels. Conclusions: This is the first study determining serum SP-D concentrations in a noninfectious, naturally occurring form of lower airway inflammation in horses. The results highlight that IAD is associated with a detectable, though moderate, increase of circulating SP-D levels. Potential relevance: Serum concentration of surfactant protein D could represent a potentially valuable and readily accessible blood biomarker of equine lower airway inflammation.

Dates et versions

hal-04224970 , version 1 (02-10-2023)

Identifiants

Citer

Eric Richard, Pierre-Hugues Pitel, U. Christmann, Pierre Lekeux, Guillaume Fortier, et al.. Serum concentration of surfactant protein D in horses with lower airway inflammation. Equine Veterinary Journal, 2012, 44 (3), pp.277-281. ⟨10.1111/j.2042-3306.2011.00421.x⟩. ⟨hal-04224970⟩

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