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Expression and modulation of CD44 variant isoforms in humans

Mackay, C. R. and Terpe, H. J. and Stauder, R. and Marston, W. L. and Stark, H. and Günthert, U.. (1994) Expression and modulation of CD44 variant isoforms in humans. The Journal of cell biology, Vol. 124, H. 1-2. S. 71-82.

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Official URL: http://edoc.unibas.ch/dok/A5249243

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Abstract

CD44 is a ubiquitous surface molecule that exists as a number of isoforms, generated by alternative splicing of 10 "variant" exons. Little is known about the expression and function of the variant isoforms, except that certain isoforms may play a role in cancer metastasis. We produced mAbs against CD44 variant regions encoded by exons 4v, 6v, and 9v, by immunizing mice with a fusion protein spanning variant exons 3v to 10v. A comprehensive analysis of human tissues revealed that CD44 variant isoforms were expressed widely throughout the body, principally by epithelial cells. However there was differential expression of CD44 variant exons by different epithelia. Most epithelia expressed exon 9v, but much fewer expressed 6v or 4v. The regions of epithelia that expressed the highest levels of the variant isoforms were the generative cells, particularly the basal cells of stratified squamous epithelium, and of glandular epithelium. CD44 variant isoforms were also expressed differentially by leukocytes, with CD44-9v expressed at very low levels and CD44-6v and 4v virtually absent. However, CD44-9v and CD44-6v were the main variants that were transiently upregulated on T cells after mitogenic stimulation and on myelomonocytic cell lines by TNF alpha and IFN gamma treatment. Some epithelial cell lines could preferentially upregulate CD44-6v upon IFN gamma incubation. These results show that CD44 variant isoforms are expressed much more widely than first appreciated, and that expression of the variant isoforms on some cell types can be modulated by particular cytokines.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Neuro- und Muskelpathologie (Frank)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Neuro- und Muskelpathologie (Frank)
03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Allgemeine Pathologie (Tolnay)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Allgemeine Pathologie (Tolnay)
03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Allgemeine und spezielle Pathologie (Oberholzer)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Allgemeine und spezielle Pathologie (Oberholzer)
UniBasel Contributors:Günthert, Ursula
Item Type:Article, refereed
Bibsysno:Link to catalogue
Publisher:Rockefeller University Press
ISSN:0021-9525
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Last Modified:31 Dec 2015 10:44
Deposited On:22 Mar 2012 13:35

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