Abstract
We investigated the changes in polymorphonuclear leukocyte (PMN) subpopulations that accompany severe bacterial infection and examined their usefulness as a parameter for assessing the severity of infection. The Percoll density gradient was used to fractionate neutrophils into subpopulations of high density (1.09–1.10), intermediate density (1.08–1.09), and low density (1.07–1.08) with the majority of neutrophils from normal volunteers being of high density. By contrast, neutrophils from infected patients were of intermediate or low density, while those from severely infected patients showed a high percentage of the low density fraction with functional changes in lower chemotactic and β-gulcuronidase activity. When each density subpopulation in the normal blood neutrophils was tested, low density PMNs had the lowest chemotaxis and minimal β-glucuronidase activity. These results indicate that the increase in low density PMNs in patients with severe infection clearly reflects the functional impairment of PMNs. Flow cytometric analysis demonstrated that the neutrophils from severely infected patients had an decrease in CD10 expression. The percentage of CD10 positive PMNs correlated well with the severity of infection and with the clinical course of the patients. Thus, we conclude that PMN-density and CD10 expression change during severe bacterial infection, and that the measurement of PMN-subpopulations may be used to complement the clinical assessment of the severity of infections.
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Morisaki, T., Goya, T., Ishimitsu, T. et al. The increase of low density subpopulations and CD10 (CALLA) negative neutrophils in severely infected patients. Surg Today 22, 322–327 (1992). https://doi.org/10.1007/BF00308740
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DOI: https://doi.org/10.1007/BF00308740