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The cells synthesize angiotensin-converting enzyme, express surface receptors for acetylated low density lipoprotein, produce thrombospondin and show intracellular staining with an antibody to von Willebrand factor.

Cathepsin L is secreted by EOMA cells and is responsible for the generation of endostatin L.

Although constitutive cytokine gene expression exists in EOMA cells, the level of IL-6 mRNA is prominently elevated by incubation with Liposome encapsulated hemoglobin (LEH).

The cells constitutively express the vascular addressin identified by antibody MECA-99.

1. Remove and discard culture medium.
2. Briefly rinse the cell layer with 0.25% (w/v) Trypsin-0.53 mM EDTA solution to remove all traces of serum that contains trypsin inhibitor.
3. Add 2.0 to 3.0 mL of Trypsin-EDTA solution to flask and observe cells under an inverted microscope until cell layer is dispersed (usually within 5 to 15 minutes).
   Note: To avoid clumping do not agitate the cells by hitting or shaking the flask while waiting for the cells to detach. Cells that are difficult to detach may be placed at 37°C to facilitate dispersal.
4. Add 6.0 to 8.0 mL of complete growth medium and aspirate cells by gently pipetting.
5. Add appropriate aliquots of the cell suspension to new culture vessels.
6. Incubate cultures at 37°C

Felbor U, et al. Secreted cathepsin L generates endostatin from collagen XVIII. EMBO J. 19: 1187-1194, 2000. PubMed: 10716919

Obeso J, et al. A hemangioendothelioma-derived cell line: its use as a model for the study of endothelial cell biology. Lab. Invest. 63: 259-269, 1990. PubMed: 2166185

Zhu XL, et al. Kinetics of cytokine gene expression in macrophage and endothelial cell lines following liposome encapsulated haemoglobin (LEH) treatment in vitro. Cytokine 8: 541-547, 1996. PubMed: 8891435

Wen W, et al. The generation of endostatin is mediated by elastase.. Cancer Res. 59: 6052-6056, 1999. PubMed: 10626789