title: Characterization of a sterile soft-tissue inflammation model in thoroughbred horses.
abstract: This paper describes the use of subcutaneously-placed tissue chambers as a sterile soft-tissue inflammation model in Thoroughbred horses. Acute, non-immune inflammation was initiated by injecting a sterile lambda carrageenan solution into a tissue chamber. This model was used to study the temporal changes in oxygen and carbon dioxide tensions, pH, bicarbonate, protein, albumin, prostaglandin E2 (PGE2) and leukotriene B4 (LTB4) concentrations, cell counts and differential counts in tissue fluid from inflamed tissue chambers and control chambers. Skin temperatures over control and inflamed chambers were also compared. Carrageenan-induced inflammation resulted in significant increases in tissue-fluid carbon dioxide tension, leucocyte count, albumin, and PGE2 and LTB4 concentrations. It also resulted in a significant decrease in tissue fluid pH and HCO3-concentration. Inflammation did not result in significant changes in tissue-fluid protein concentration, differential cell counts or skin temperature over the chambers. The use of this type of tissue chamber is well-suited for studying the pathophysiology of a self-contained, non-immune inflammatory process. The model described in this paper could prove to be very useful in studies of the distribution of anti-inflammatory drugs and the effects of such drugs on various aspects of the inflammatory process.
authors.affiliation: Equine Research Centre, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.
authors.forename: A J
authors.initials: AJ
authors.lastname: Guthrie
authors.forename: C R
authors.initials: CR
authors.lastname: Short
authors.forename: G E
authors.initials: GE
authors.lastname: Swan
authors.forename: M S
authors.initials: MS
authors.lastname: Mülders
authors.forename: V M
authors.initials: VM
authors.lastname: Killeen
authors.forename: J P
authors.initials: JP
authors.lastname: Nurton
mesh_terms: D000818:Animals; D001639:Bicarbonates / Q000378:metabolism; D002245:Carbon Dioxide / Q000378:metabolism; D015194:Diffusion Chambers, Culture / Q000662:veterinary; D015232:Dinoprostone / Q000378:metabolism; D004195:Disease Models, Animal; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005122:Exudates and Transudates / Q000737:chemistry / Q000166:cytology; D005260:Female; D006734:Horse Diseases / Q000503:physiopathology; D006736:Horses; D006863:Hydrogen-Ion Concentration; D007249:Inflammation / Q000503:physiopathology / Q000662:veterinary; D007958:Leukocyte Count / Q000662:veterinary; D007975:Leukotriene B4 / Q000378:metabolism; D010101:Oxygen Consumption / Q000502:physiology; D011506:Proteins / Q000378:metabolism; D012881:Skin Temperature; D018461:Soft Tissue Infections / Q000503:physiopathology / Q000662:veterinary*; D012984:Software
chemical_list: D001639:Bicarbonates; D011506:Proteins; D002245:Carbon Dioxide; D007975:Leukotriene B4; D015232:Dinoprostone