Abstract
Human inter-alpha-inhibitor (IalphaI) has been shown to exert a beneficial therapeutic effect in a porcine model of endotoxin shock. It is therefore useful to have a better understanding of IalphaI metabolism during severe inflammatory syndromes. Experimental bacterial pneumonia was induced in pigs. The acute phase response was highlighted by an increase in pig major acute phase protein (pig-MAP) and haptoglobin concentrations in plasma collected daily over 4 days. In the same samples, the IalphaI levels remained unchanged. Moreover, crossed-immunoelectrophoretic and immunoblot analyses did not show any qualitative modification of IalphaI throughout the experiment. IalphaI has been reported to be a negative acute phase protein in both humans and rats. Here we demonstrated that IalphaI behavior clearly differs in humans and pigs and is definitively species specific.
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