Abstract
We investigated the interactions between liposome-encapsulated hemoglobin (Neo Red Cells: NRC) and human polymorphonuclear leukocytes as assessed by superoxide generation. NRC triggered superoxide generation from neutrophils in a dose-dependent manner. Empty liposomes also induced superoxide production of neutrophils. Superoxide generation of neutrophils induced by phorbol myristate acetate (PMA) was delayed but intensified both by NRC and empty liposomes. The intensity of superoxide generation induced by NRC was smaller than that by the empty liposomes. As NRC contained superoxide dismutase (SOD) that was copurified with hemoglobin from red blood cells and its activity remained, SOD contained in NRC may partially eliminate superoxide.
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