Journal of Lipid Research, Vol 26, 267-269, Copyright © 1985 by Lipid Research, Inc.
Latex immunoassay of human serum Lp(a+) lipoprotein
N Vu-Dac, A Chekkor, H Parra, P Duthilleul and JC Fruchart
A sensitive latex immunoassay for human serum lipoprotein Lp(a+) is based
on direct agglutination by Lp(a+) of latex particles coated with specific
antibody. The agglutination is quantified by turbidimetry using a
photometer at 360 nm. The stabilization of antibody-coated latex particles
by bovine serum albumin occurs under well-defined conditions (pH,
concentration of bovine serum albumin, and antibody loading of latex
particles). The standard curve of serum lipoprotein Lp(a+) ranges from 0.05
to 1.15 mg/l. Inter- and intra-assay coefficients of variation were less
than 8% and 3%, respectively. Results were well correlated with those
obtained by electroimmunodiffusion (r = 0.98, n = 108).