A New Endothelial Molecule Involved in Melanoma Cell Binding to Human Dermal Microvascular Endothelial Cells.
10.5021/ad.1994.6.1.9
- Author:
Kwang Hoon LEE
;
Kee Yang CHUNG
;
Thomas J LAWLEY
;
Robert A SWERLICK
- Publication Type:Original Article
- Keywords:
Cell adhesion molecule;
Human dermal microvascular endothelium;
Melanoma
- MeSH:
Blotting, Western;
Cell Adhesion Molecules;
Dermis;
Endothelial Cells*;
Humans*;
In Vitro Techniques;
Interleukin-1;
Melanoma*;
Tetradecanoylphorbol Acetate;
Tumor Necrosis Factor-alpha
- From:Annals of Dermatology
1994;6(1):9-16
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: We have previously demonstrated that phorbol myristate acetate (PMA)-induced increases in melanoma cell binding to endothelial cells derived from human dermis (HDMEC) are not mediated via known cell adhesion molecules and may be affected through microvessel-specific novel proteins not previously described on endothelial cells. OBJECTIVE: This study was performed to identify new molecules which may play a role in HDMEC-melanoma cells binding. METHODS: We have generated a monoclonal antibody(Mab) against PMA-stimulated HDMEC. A Mab was evaluated functionally through melanoma cell-endothelial cell adherence assay and characterized by Western immunoblot. RESULTS: Mab EM-71 recognized a molecule with expression levels in vitro that could be upregulated by PMA(EM-71 molecule). The expression of EM-71 molecule on HDMEC was increased in a dose-dependent manner by PMA only, but not affected by interleukin 1 alpha(IL-lα) or tumor necrosis factor alpha(TNFα) PMA augmented melanoma cell adherence to HDMEC, which is coincident with an increase in EM-71 molecule expression on HDMEC by PMA. Mab EM-71 partially inhibited up to 59% of the increased melanoma cell binding to PMA-stimulated HDMEC and failed to block melanoma cell binding to IL-lα or TNFα-stimulated HDMEC. Western immunoblots of lysates of HDMEC demonstrated a 200 kDa protein on HDMEC. CONCLUSION: This study demonstrates that EM-71 molecule may play a partial role in melanoma binding to PMA-stimulated HDMEC.
