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Journal of Cell Science, Vol 95, Issue 3 487-498, Copyright © 1990 by Company of Biologists

JOURNAL ARTICLES

Polymorphonuclear leukocyte phagocytosis of Capnocytophaga ochracea in three-dimensional plasma clots

TJ Hurst and JM Wilton
Medical Research Council, Dental Research Unit, London, UK.

We have studied the ability of human polymorphonuclear leukocytes (PMN) to phagocytose Capnocytophaga ochracea in three-dimensional fibrin meshworks. Phagocytosis was assessed in three systems: (1) the PMN and bacteria were mixed together with plasma and clotted; 60 +/- 13% phagocytosis occurred after 60 min; (2) PMN were overlaid on clots containing bacteria; the PMN migrated into the clot and after 60 min 52 +/- 7% phagocytosis was seen; (3) PMN had to migrate from within one clot into a second containing bacteria; phagocytosis after 60 min was 54 +/- 3%. In the clots, PMN released lysozyme but this was not significantly enhanced by phagocytosis. These findings indicate that PMN are capable of phagocytosing in each of the three-dimensional systems tested and that they are capable of both migration into and subsequent phagocytosis in a model that more closely mimics the in vivo structure in which PMN would normally perform.


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© The Company of Biologists Ltd 1990