The changes in the serum proteinogram of equines submitted to ischemia and reperfusion of small colon by intraluminal distension were evaluated. Ten horses were submitted to standing laparotomy to induce a small colon obstruction for four hours. Five animals were instrumented without distention (control group - G1). In another five animals, mural ischemia was promoted placing a latex balloon distended with 40mmHg into the small colon (distended group - G2). Blood samples were collected before the surgical procedures (M1) and 4h after the balloon placement (M2) and 3h (M3) and 12h (M4) after reperfusion. After centrifugation and fractioning of the samples, the acute phase proteins were separated by SDS-PAGE and their concentrations were determined by computer densitometry. Nineteen proteins were separated by eletrophoresis and the molecular weights ranged from 185,000 to 14,000 Dalton (Da). The found molecular weights, related to the most known proteins, were: ceruloplasmin, 130,000 Da; C-reactive protein, 122,000 Da; transferrin, 85,000 Da; α1-antitripsin, 61,000 Da; haptoglobin, 47,000 Da; and acid glycoprotein, 40,000 Da. The results showed that acute phase proteins changed after surgical injury.
equine; proteinogram; small colon; intraluminal distension
