Chemiluminescence sandwich enzyme immunoassay for determination of human granulocyte colony stimulating factor (G‐CSF)

Publisher Website
Google Scholar
Abstract
A chemiluminescence sandwich enzyme immunoassay, using a glucose oxidase (GO) label, was developed for detecting attomole amounts of human granulocyte colony stimulating factor (G‐CSF). Purified goat F(ab′)2 immobilized on a bead and purified goat Fab′ labelled with GO were selected in combination with a chemiluminescent detection system comprising luminol and ferricyanide. The detection limits for G‐CSF were 4amol/assay (1 pg/mL) in buffer solution and 10 amol/assay (2.5 pg/mL) in human serum. Coefficients of variation within assay and between assay ranged from 5.5% to 7.8% and from 3.4% to 16.0%, respectively. The G‐CSF content of serum from normal healthy individuals was measurable using this method. G‐CSF in 24 normal human sera showed a mean value of 19.3 pg/mL and ranged from 3.6 to 83.0 pg/mL.