Plasma spermidine concentrations in patients with tumours of the breast or prostate or testis.

Plasma spermidine concentrations were measured by radioimmunoassay in normal subjects and in patients with various tumours of the breast, prostate or the testis. The sensitivity of the method was 0.45 pmol spermidine/20 microliter plasma and the cross reactivity was 13% with putrescine and 2% with spermine.

Plasma spermine concentrations of patients with benign and malignant tumours of the breast or prostate.

A radioimmunoassay has been developed for the measurement of plasma spermine concentrations. The sensitivity of the method is 1 pmol spermine/100 microliters plasma and the crossreactivity was 12% with spermidine and 0.18% with putrescine.