Development of a simple radioimmunoassay for human C3a

Herbert R. Lamche, Eva Paul, Gunther Schlag, Heinz Redl, Dale E. Hammerschmidt

Research output: Contribution to journalArticlepeer-review


A radioimmunoassay was devised for the human complement cleavage product, C3a, using charcoal separation and selective precipitation of interfering substances. When compared with the commercially available immunoassay now marketed, the assay reported here was somewhat simpler to perform; furthermore, it overcame delivery and availability problems in Europe. The assay showed a mean recovery of 87% of known amounts of C3a or C3adesarginine and had a sensitivity of 32 ng C3a per milliliter of plasma; coefficients of variance were comparable to other radioimmunoassays in common use. Using this assay in a first clinical application, we were able to document a small but statistically significant rise in [C3a] during cardiopulmonary bypass.

Original languageEnglish (US)
Pages (from-to)265-276
Number of pages12
Issue number3
StatePublished - Jun 1 1988


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