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Clinical Chemistry, Vol 27, 687-691, Copyright © 1981 by American Association for Clinical Chemistry
SN Thibodeau, L Freeman and NS Jiang
We describe a dual-isotope assay for measuring the concentration of estrogen receptors and progesterone receptors in tumor cytosols. The concentrations of these receptors are derived from separate Scatchard- plot analyses of a single dextran-coated charcoal assay that incorporates both radioiodinated estradiol and tritiated R5020 as the labeled ligands. The two isotopes, radioiodine and tritium, are easily measured with a liquid-scintillation counter. The concentrations of estrogen and progesterone receptors derived from the dual-label assay are identical to values derived from the respective single-label assays. Moreover, values obtained from an assay with dextran-coated charcoal that incorporates radioiodinated estradiol are identical to those obtained from an assay in which tritiated estradiol is used as the labeled ligand. The dual-isotope assay requires both less time and less tissue.
The following articles in journals at HighWire Press have cited this article:
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A.S. Bilsel, H. Moini, E. Tetik, F. Aksungar, B. Kaynak, and A. Ozer 17{beta}-Estradiol modulates endothelin-1 expression and release in human endothelial cells Cardiovasc Res, June 1, 2000; 46(3): 579 - 584. [Abstract] [Full Text] [PDF] |
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E. Eriksen, D. Colvard, N. Berg, M. Graham, K. Mann, T. Spelsberg, and B. Riggs Evidence of estrogen receptors in normal human osteoblast-like cells Science, July 1, 1988; 241(4861): 84 - 86. [Abstract] [PDF] |
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