claim: human mast cells suppress interleukin-6 production by quiescent and lipopolysaccharide-stimulated human coronary artery endothelial cells
evidence_1: histamine-induced production of interleukin-6 and interleukin-8 by human coronary artery endothelial cells is enhanced by endotoxin and tumor necrosis factor-alpha.", "endothelial cells (10,000 cells/well) figure 2 mast cells dose-dependently potentiate lps-induced il-6 production by hcaec.", "endothelial cells (10,000 cells/well) figure 1 mast cells potentiate lps- induced il-6 production by hcaec.")