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Clinical Chemistry 31: 1659-1663, 1985;
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Clinical Chemistry, Vol 31, 1659-1663, Copyright © 1985 by American Association for Clinical Chemistry

Monoclonal antibodies can precipitate low-density lipoprotein. II. Radioimmunoassays with single and combined monoclonal antibodies for determining apolipoprotein B in serum of patients with coronary artery disease

S Marcovina, BA Kottke and SJ Mao

We have established four lines of monoclonal antibodies against human low-density lipoproteins (LDL) that, mixed in equal proportions, can precipitate LDL in gel and so can be used for apolipoprotein (apo) B determination in plasma. One monoclonal antibody (clone A), with a relatively low binding affinity to LDL (ka = 0.6 X 10(9) L/mol) and recognizing only two species of apo B, significantly underestimated the concentration of apo B in 74 patients with and 27 without coronary artery disease (CAD). High-affinity monoclonal antibody C (Ka = 3.8 X 10(9) L/mol), which recognized all four apo B species, gave the same value for apo B as determined with the mixture of monoclonal antibodies. The latter results (by radioimmunoassay, y) correlated well with those by radial immunodiffusion (chi): y = 0.994 chi + 0.003 (r = 0.987). The CAD patients showed an increased concentration of apo B as compared to the angiographically documented CAD-negative patients. Except for the values determined by clone B (p = 0.07), the increase was statistically significant (p = 0.002-0.018) for values determined by use of the other clones or their mixture.


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W. L. Chen, M. T. Huang, H. C. Liu, C. W. Li, and S. J. T. Mao
Distinction Between Dry and Raw Milk Using Monoclonal Antibodies Prepared Against Dry Milk Proteins
J Dairy Sci, August 1, 2004; 87(8): 2720 - 2729.
[Abstract] [Full Text] [PDF]


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Copyright © 1985 by the American Association for Clinical Chemistry.