The Journal of Experimental Medicine
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The Journal of Experimental Medicine, Vol 108, 185-196, Copyright, 1958, by The Rockefeller Institute for Medical Research New York

ARTICLE

STUDIES ON THE ANTIGENICITY OF ß- AND alpha1-LIPOPROTEINS OF HUMAN SERUM

Angelo Scanu M.D.1, Lena A. Lewis Ph.D.1, and Irvine H. Page M.D.1

1 From the Research Division of The Cleveland Clinic Foundation, and The Frank E. Bunts Educational Institute, Cleveland

The techniques of agar immunoelectrophoresis and agar double diffusion were applied to the study of the antigenicity of ß- and alpha1-lipoproteins separated by ultracentrifugation from normal human sera. The effects of delipidation were also investigated.

It was shown that ß- and alpha1-lipoproteins are antigenically distinct. For each class of lipoprotein studied, a single antigenic component was demonstrated. In some, but not all, preparations of alpha1-lipoprotein a second, small antigenic component was detected, and identified as albumin. Absorption with lipoprotein-free serum or albumin removed this component without changing the lipoprotein band.

Delipidation did not affect the antigenicity of either ß- or alpha1-lipoproteins. Immunoelectrophoresis, because of its high sensitivity and specificity, provides an additional criterion of purity for antigenic proteins in addition to the data that can be obtained from ultracentrifugal and free electrophoretic analysis.

 Submitted on March 23, 1958


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