Abstract:
:P-selectin (CD62P) is a cell adhesion molecule expressed on stimulated endothelial cells and on activated platelets. It interacts with PSGL-1 (P-selectin glycoprotein ligand-1; CD162) on leukocytes and mediates recruitment of leukocytes during inflammation. P-selectin also binds to several types of cancer cells in vitro and facilitates growth and metastasis of colon carcinoma in vivo. Here we show that P-selectin, but not E-selectin, binds to NCI-H345 cells, a cell line derived from a human small cell lung cancer. EDTA or P7 (a leukocyte adhesion blocking mAb to P-selectin), but not PL5 (a leukocyte adhesion blocking mAb to PSGL-1), can inhibit this binding. P-selectin affinity chromatography can precipitate a approximately 110-kDa major band and a approximately 220-kDa minor band from [3H]-glucosamine-labeled NCI-H345 cells. No expression of PSGL-1 protein and mRNA can be detected in NCI-H345 cells. Taken together, these results suggest that NCI-H345 cells express glycoprotein ligands for P-selectin that are distinct from leukocyte PSGL-1.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Li L,Short HJ,Qian KX,Elhammer AP,Geng JGdoi
10.1006/bbrc.2001.5806subject
Has Abstractpub_date
2001-11-02 00:00:00pages
637-44issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(01)95806-1journal_volume
288pub_type
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