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. 1967 Jul;94(1):149–156. doi: 10.1128/jb.94.1.149-156.1967

Role of the Phagocyte in Host-Parasite Interactions VIII. Effect of Whole-Body X Irradiation on Nicotinamides, Lysosomal Enzymes, and Bactericidal Activities of Leukocytes During Phagocytosis

R J Selvaraj 1, A J Sbarra 2
PMCID: PMC251883  PMID: 4381885

Abstract

By studying the effects of whole-body X irradiation on phagocytosis, a correlation between the metabolic and bactericidal activities of leukocytes following X irradiation was demonstrated. The total nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP) content of polymorphonuclear neutrolphils (PMN) isolated from irradiated guinea pigs increased significantly when compared to nonirradiated controls. The ratio of unreduced to reduced (NAD) generally increased in PMN isolated from irradiated animals. This occurred with both resting and phagocytizing cells. The ratio of unreduced to reduced NADP of resting PMN isolated from irradiated animals had a tendency to increase. However, in phagocytizing cells a significant decrease in the ratio was noted. The total acid and alkaline phosphatase and β-glucuronidase increased up to about 10 days postirradiation. These lysosomal enzymes returned to approximately normal by the 17th day postirradiation. All three lysosomal enzymes (acid and alkaline phosphatases and β-glucuronidase) were released from the granules at a significantly faster rate during phagocytosis after irradiation. The bactericidal activities of PMN isolated from irradiated animals gradually decreased, and in some cases increased growth of the organisms was observed. The uptake or association of bacteria with PMN isolated from irradiated animals varied with the postirradiation time. Generally, a correlation with bactericidal activities could be made. The data indicate that the bactericidal system in phagocytes consists of at least two agents, H2O2 and myeloperoxidase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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