Basal cell adhesion molecule/lutheran protein: The receptor critical for sickle cell adhesion to laminin

Manisha Udani, Qin Zen, Maisha Cottman, Nicole Leonard, Shawn Jefferson, Carrie Daymont, George Truskey, Marilyn J. Telen

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Abstract

Sickle red cells bind significant amounts of soluble laminin, whereas normal red cells do not. Solid phase assays demonstrate that B-CAM/LU binds laminin on intact sickle red cells and that red cell B-CAM/LU binds immobilized laminin, whereas another putative laminin binding protein, CD44, does not. Ligand blots also identify B-CAM/LU as the only erythrocyte membrane protein(s) that binds laminin. Finally, transfection of murine erythroleukemia cells with human B-CAM cDNA induces binding of both soluble and immobilized laminin. Thus, B-CAM/LU appears to be the major laminin- binding protein of sickle red cells. Previously reported overexpression of B- CAM/LU by epithelial cancer cells suggests that this protein may also serve as a laminin receptor in malignant tumors.

Original languageEnglish (US)
Pages (from-to)2550-2558
Number of pages9
JournalJournal of Clinical Investigation
Volume101
Issue number11
DOIs
Publication statusPublished - Jun 1 1998

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All Science Journal Classification (ASJC) codes

  • Medicine(all)

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