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. 1983 Dec 1;158(6):2016–2023. doi: 10.1084/jem.158.6.2016

Receptors for C3b and C3bi promote phagocytosis but not the release of toxic oxygen from human phagocytes

PMCID: PMC2187185  PMID: 6227677

Abstract

We have measured the release of H2O2 from granulocytes, monocytes, and macrophages during spreading on ligand-coated culture surfaces. While IgG-coated surfaces stimulate vigorous release of H2O2, neither C3b- nor C3bi-coated surfaces promoted appreciable release of H2O2 despite full ligation of C3b and C3bi receptors. We also measured release of H2O2 from cultured monocytes spreading on surfaces coated with both fibronectin and C3. Under such circumstances, the C3 receptors elicit a strong phagocytic response, but no H2O2 release was recorded. We conclude that the C3b and C3bi receptors of monocytes and granulocytes do not signal the generation of toxic oxygen intermediates from these cells.

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Selected References

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