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. 1974 Jun;9(6):1022–1027. doi: 10.1128/iai.9.6.1022-1027.1974

Characteristics of Streptolysin O Hemolysis: Kinetics of Hemoglobin and 86Rubidium Release

James L Duncan 1
PMCID: PMC414927  PMID: 4598253

Abstract

The characteristics of hemolysis produced by streptolysin O (SLO) were investigated in rabbit, human, and rat erythrocytes. Kinetic studies of hemoglobin (Hb) release showed that rabbit and human erythrocytes exhibited typical “multi-hit” survival curves. Extrapolation of these curves to the ordinate indicated that approximately two molecules of SLO may be sufficient to produce lysis of a single cell. In contrast, exponential (“single-hit”) survival curves were observed when rat erythrocytes were treated with SLO. At 0 C, high concentrations of SLO rapidly lysed rabbit erythrocytes; low concentrations had no effect on the cells at this temperature. The release of intracellular 86rubidium (86Rb+) and Hb in rabbit erythrocytes exposed to SLO was investigated. In the presence of phosphate-buffered saline, rubidium and Hb were lost at the same rate from toxin-treated cells. The addition of bovine serum albumin to the suspending medium did not retard the escape of Hb, and the efflux of 86Rb+ only slightly preceded Hb loss. Addition of sucrose to the cells delayed both Hb and rubidium release. These results are interpreted as indicating that the “colloid-osmotic” lytic process is not involved in the hemolysis of erythrocytes by streptolysin O.

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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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