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Impact of co-amoxiclav on polymorphonuclear granulocytes from chronic hemodialysis patients.

Phagocyte-dependent host defenses are frequently impaired in maintenance hemodialysis patients who show an increased susceptibility to infections. In these individuals, the course of infections can be more aggressive than in normal hosts, and the antibiotic of choice should have a high antimicrobial effect without impairing host defenses. Hence, in uremic patients, the antibiotic enhancement of phagocyte functions may be of potential clinical importance in the outcome of bacterial infections. Because we demonstrated previously that co-amoxiclav had beneficial properties that result in enhancement of the microbicidal functions of human polymorphonuclear cells (PMNs) from healthy subjects, we investigated the influence of this combination on the activities of PMNs from chronic hemodialysis patients against Klebsiella pneumoniae, a human pathogen that can pose severe problems in patients whose immunity is impaired. PMNs from chronic dialysis patients showed a diminished in vitro phagocytic efficiency with a reduced phagocytosis and bactericidal activity towards intracellular K. pneumoniae compared with that seen in PMNs from healthy subjects. When co-amoxiclav was added to PMNs from chronic hemodialysis patients, it was able to restore the depressed primary functions of PMNs, resulting in a significant high increase in both phagocytosis or killing activity. A similar pattern was detected with PMNs collected from hemodialysis patients treated with co-amoxiclav. The results of the present study provide evidence that co-amoxiclav is able to induce stimulation of depressed phagocytic response of PMNs from patients on chronic hemodialysis, restoring their primary functions both in vitro and in vivo.