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- W2000303527 abstract "CD44 alternative splicing patterns differ between normal and malignant tissue, and accordingly, modulation of CD44 splicing has received the most attention in studies that have examined the role of CD44 in tumor progression. Many investigators have examined functional differences between individual CD44 alternative splice variants. However, specific CD44 isoforms function uniquely depending on the type of cell on which they are expressed, thereby suggesting that additional tissue-specific mechanisms regulate CD44 function. In the present study we have demonstrated that colon carcinoma cells modify CD44 with O-linked glycosyl groups, and blockade of this glycosylation enhances their CD44-mediated adhesion to hyaluronate. This enhancement is attributable principally to CD44H (CD44s) rather than high molecular weight CD44 variants. Use of site-directed mutant CD44H cDNA transfectants demonstrated that CD44 O-linked glycosylation modulates interaction between hyaluronate and the B loop domain of CD44. The influence of glycosylation on CD44 function in colon carcinoma cells is specific to the presence of O-linked sugars; inhibition of N-linked glycosylation had minimal influence on CD44 function. These findings indicate that O-linked glycosylation may be as important as alternative splicing in the regulation of CD44 function and the broad spectrum of biological processes attributed to it, including normal development, tumor metastases, and lymphocyte function." @default.
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- W2000303527 date "1996-10-01" @default.
- W2000303527 modified "2023-09-27" @default.
- W2000303527 title "O-linked Glycosylation Modifies CD44 Adhesion to Hyaluronate in Colon Carcinoma Cells" @default.
- W2000303527 doi "https://doi.org/10.1006/bbrc.1996.1475" @default.
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