Abstract:
:CD44 is a major cell-surface receptor for hyaluronate (HA). By alternative RNA-splicing a large number of CD44 variants are generated. To explore the role of CD44 splicing in the regulation of cell binding to HA, three different isoforms of CD44 were transfected in the CD44 negative B-cell lymphoma line Namalwa and in the fibroblastoid cell line COS7. We observed that whereas the standard form of CD44 (CD44s) mediated adhesion of Namalwa to HA, Namalwa transfected with CD44v3-10 or CD44v8-10 was unable to bind to either immobilized or soluble HA. After stimulation of CD44 with an activating anti-CD44 mAb or with phorbol ester, the binding of CD44s to HA was 5- to 10-fold higher than that of the other two isoforms. By contrast, COS7 cells transfected with CD44s, CD44v8-v10, or CD44v3-v10 bound equally effectively to HA. Hence, in addition to alternative splicing, cell type determines CD44 binding to HA.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
van der Voort R,Manten-Horst E,Smit L,Ostermann E,van den Berg F,Pals STdoi
10.1006/bbrc.1995.2267subject
Has Abstractpub_date
1995-09-05 00:00:00pages
137-44issue
1eissn
0006-291Xissn
1090-2104pii
S0006291X8572267Xjournal_volume
214pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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