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. 1990 Jul;81(1):132–136. doi: 10.1111/j.1365-2249.1990.tb05303.x

Quantitative measurement of SC5b-9 and C5b-9(m) in infarcted areas of human myocardium.

F Hugo 1, T Hamdoch 1, D Mathey 1, H Schäfer 1, S Bhakdi 1
PMCID: PMC1535001  PMID: 2379317

Abstract

Previous immunohistochemical work has indicated that terminal C5b-9 complement complexes are selectively deposited in infarcted areas of human myocardium. In the present study, we sought to quantify C5b-9 levels in myocardial tissue, and to differentiate between the membrane-bound C5b-9 (m) and the cytolytically inactive SC5b-9 complex. Paired tissue specimens from infarcted and non-infarcted myocardium were obtained from 36 autopsies. The homogenized and washed tissues were extracted with n-octyl-beta-D-glucopyranoside (octylglucoside) detergent, and the concentrations of C5b-9 in the extracts were determined by ELISA. Membrane-derived C5b-9 (m) and SC5b-9 were differentiated from each other on the basis of their characteristic sedimentation behaviour in sucrose density gradients. It was found that infarcted myocardial tissue contained on average an approximately three-fold higher concentration of C5b-9, compared with non-infarcted tissue. This increase was due in part to an increase in levels of C5b-9 (m). The results corroborate previous immunohistochemical data and show that complement activation occurs to completion with the generation of potentially cytotoxic C5b-9 complexes in infarcted myocardial tissues.

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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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