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Simultaneous localization of six antigens in single sections of transgenic mouse intestine using a combination of light and fluorescence microscopy
ML Hermiston, CB Latham, JI Gordon and KA Roth
Department of Molecular Biology and Pharmacology, Washington University School of Medicine, St Louis, Missouri 63110.
To study the geographic differentiation of the intestinal epithelium and to understand the complex lineage relationships of its cell populations, it is often necessary to visualize the protein products of multiple genes in sections prepared from different positions along the duodenal-to-colonic and/or crypt-to-villus axes. Multilabel fluorescence or brightfield immunohistochemical techniques have previously been used for this purpose. However, the number of antigens that can be identified on single sections is limited in fluorescence microscopy by the number of fluorophores with non-overlapping absorption and emission characteristics, in brightfield microscopy by the number of visually distinguishable chromogens, and in both methods by the availability of primary antisera raised in multiple species. We have now used a combination of light and fluorescence microscopic techniques to increase the number of antigens that can be detected in a single section to six. Sections were sequentially stained using immunogold with silver intensification, peroxidase-antiperoxidase with diaminobenzidine chromogen, and peroxidase-anti-peroxidase with alpha- naphthol/basic dye as chromogen, followed by simultaneous fluorescent detection with fluorescein, 7-amino-4-methylcoumarin-3-acetic acid, and beta-phycoerythrin. This method enables up to four separate antigens to be visualized within a single cell and two additional antigens to be detected in unrelated cells. The technique is illustrated by examining the cellular patterns of expression of liver fatty acid binding protein/human growth hormone fusion genes in the intestinal epithelium of adult transgenic mice. It should be generally applicable to other experimental systems that require localization of multiple antigens in single tissue sections.
Volume 40,
Issue 9,
pp. 1283-1290,
09/01/1992
Copyright © 1992 by The Histochemical Society
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