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Clinical Chemistry 37: 369-376, 1991;
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Clinical Chemistry, Vol 37, 369-376, Copyright © 1991 by American Association for Clinical Chemistry

Relationships between the proton nuclear magnetic resonance properties of plasma lipoproteins and cancer

JD Otvos, EJ Jeyarajah, LW Hayes, DS Freedman, NA Janjan and T Anderson
Department of Chemistry, University of Wisconsin-Milwaukee.

We conducted a comprehensive investigation of the origin of nuclear magnetic resonance (NMR) lineshape variability of plasma lipids among healthy individuals and those with cancer. The methyl and methylene resonances of lipid in human plasma, whose linewidths have been reported to correlate with the presence of malignancy, are composed of the overlapping resonances of "mobile" protons from the major lipoproteins (very-low-, low-, and high-density lipoproteins). We tested two hypotheses for the origin of the narrower plasma linewidths observed for cancer patients: (a) malignancy-associated differences in the spectral properties (chemical shift, lineshape) of one or more of the lipoproteins, and (b) differences in the fraction of lipoprotein lipid giving rise to detectable NMR signal. Analysis of the concentrations of lipoprotein lipid and of 500 MHz NMR spectra of the lipoprotein constituents in greater than 100 plasma samples failed to provide support for either hypothesis. Although linewidths were found to be significantly narrower for the cancer group, the difference is entirely attributable to differences in the concentrations of the lipoproteins.


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Dietary modification of high density lipoprotein phospholipid and influence on cellular cholesterol efflux
J. Lipid Res., October 1, 1998; 39(10): 2065 - 2075.
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Copyright © 1991 by the American Association for Clinical Chemistry.