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As concentrações plasmáticas das aminas triptamina (TRP), tyramina (TYR) e pheniletilamina (PEA) foram determinadas por cromatografia gasosa (CG) de 20 eqüinos sob efeito de sobrecarga por carboidratos (SC). Após 36h da SC os animais foram aleatoriamente divididos em quatro grupos (n=5) e receberam a cada 12h por via iv: solução salina 10mL (GC), ketoprofeno 2,2mg/kg (GK), fenilbutazona 4,4mg/kg (GF) e flunixin meglumine 1,1mg/kg (GFM). As concentrações das aminas TYR e PEA variaram de 0,18 a 164,2mg/L, com diferenças nos tempos avaliados, mas não entre os tratamentos (p<0,01). A concentração plasmática de TRP apresentou diferenças entre os tempos e também entre os tratamentos. O GC diferiu dos demais nos momentos 48h e 60h e as concentrações nos grupos GK e GFM foram menores que nos grupos GF e GC às 72h (P= 0,0012). Conclui-se que nas doses utilizadas os antiinflamatórios não esteroidais avaliados não interferem nas concentrações de TYR e PEA. Entretanto, o ketoprofeno e o flunixin meglumine foram efetivos em diminuir a concentração plasmática de TRP. The concentrations of the bioactives amines tryptamine (TRP), tyramine (TYR) and phenylethylamine (PEA) were determined by gas chromatography in plasma samples of 20 horses submitted to carbohydrate overload. Thirty hours after the overload, the horses were randomly distributed in four groups (n=5) and were submitted to four IV treatments every 12 hours: 10ml of saline (GC), ketoprofen 2.2mg/kg (GK), phenylbutazone 4.4mg/kg (GF), and flunixin meglumine 1.1mg/kg (GFM). Blood samples were collected at various times after the overload (0-72 h). Plasma TYR and PEA concentrations ranged from 0.18 to 164.2mg/L, and differed significantly with time (p<0.01), but did not differ in the treatments. Plasma concentrations of TRP differed between times and treatments. The GC was significantly major than other treatments at 48h and 60h after the overload, and the plasma concentration of TRP in groups GK and GFM was significantly lower than in groups GF and GC at 72 h (p=0.0012). We concluded that the anti-inflammatory drugs evaluated do not interfere in the plasma concentration of TYP and PEA. For TRP, ketoprofen and flunixin meglumine was effective to reduce de plasmatic concentration of this amine

pesquisa veterinária brasileira

Concentrações plasmáticas de triptamina, tiramina e feniletilamina em eqüinos sob efeitos de sobrecarga de carboidratos e antiinflamatórios não esteroidais