Quantitation of whole molecule human chorionic gonadotropin and free beta-human chorionic gonadotropin subunit in the Abbott IMx analyser.
An assay for the quantitation of the serum levels of free and whole molecule-associated beta-subunit of human chorionic gonadotropin on the Abbott IMx analyzer is described. The assay detects human beta-chorionic gonadotropin with a sensitivity of approximately 0.5 IU/l while showing no cross-reactivity with follitropin (1000 IU/l) or thyrotropin (2.0 IU/l), and 0.02% cross-reactivity with lutropin (1000 IU/l). Haemoglobin (7.50 milligrams), bilirubin (0.50 milligrams), and triacylglycerols (10.6 milligrams) did not interfere with the assay. Pooled within-run, between-run, and total assay CVs were less than or equal to 5.2%, and less than or equal to 2.7%, and less than or equal to 6.3%, respectively. Values obtained with this assay correlated well (r = 0.98, n = 228) with those values obtained using the Hybritech TandemR-R HCG (Total Beta-HCG) IRMA. The normal range of the assay was found to be less than or equal to 5 IU/l (n = 311). The assay protocol provides results for up to 23 serum samples in approximately 47.5 minutes with the ability to report the human beta-chorionic gonadotropin concentrations of 5 specimens in approximately 15.5 minutes. We conclude that this is an acceptable assay for monitoring human beta-chorionic gonadotropin levels associated with normal pregnancy, reproductive pathology, and reproductive technology such as in vitro fertilization or embryo transfer.
Figard
S D
SD
Department of Physiological Diagnostics, Abbott Laboratories, Abbott Park, IL.
Bodner
J B
JB
Babik
D M
DM
Mlyniec
D M
DM
Simpson
B
B
Venetucci
M
M
Ogunro
E A
EA
D006063:Chorionic Gonadotropin / Q000097:blood* / Q000592:standards; D018997:Chorionic Gonadotropin, beta Subunit, Human; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques / Q000295:instrumentation* / Q000592:standards; D010446:Peptide Fragments / Q000097:blood* / Q000592:standards; D011247:Pregnancy; D012016:Reference Values; D012680:Sensitivity and Specificity
D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments