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Inflammation. 1982 Mar;6(1):103-12.

Does tuftsin alter phagocytosis by human polymorphonuclear neutrophils?


The physiological significance of the putative phagocytosis-promoting peptide, tuftsin, was investigated by measurement of chemiluminescence generated during phagocytosis and by assay of the uptake of radiolabeled bacteria. We found no differences in either assay when we compared serum from splenectomized patients (which purportedly lacks tuftsin) with normal serum. Further, there was no difference when serum from splenectomized patients was employed in the presence of absence of exogenous tuftsin. Similar results were obtained under a variety of conditions, utilizing three different challenge particles with varying particle-cell ratios and serum from 20 different splenectomized patients. These results do not agree with the hypothesis that tuftsin plays a major role in promoting phagocytosis.

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