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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1983 Jun;80(12):3726–3728. doi: 10.1073/pnas.80.12.3726

Depolarization and increased conductance precede superoxide release by concanavalin A-stimulated rat alveolar macrophages.

A R Cameron, J Nelson, H J Forman
PMCID: PMC394123  PMID: 6304734

Abstract

Rat alveolar macrophages release superoxide into the extracellular medium when stimulated by concanavalin A. This process, the respiratory burst, is characterized by a delay between binding of the stimulus and release of superoxide. It has been proposed that a key event that occurs during this delay period is the alteration of membrane electrical potential. Microelectrode impalement was used to directly measure electrical properties of the plasma membrane. Upon addition of concanavalin A, the membrane potential depolarized 21%, and membrane electrical resistance decreased 16%. Parallel chemical measurement of superoxide release indicated that these changes in electrical properties precede the release of superoxide.

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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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