Noninflammatory expression of E-selectin in proliferating HDMECs. (A) E-selectin was measured by ELISA in proliferating HDMECs incubated for 2 days in the absence (C) or presence of soluble TNF-–receptor (sTNF-R) or soluble IL-1β–receptor (sIL-1b-R). (B) As a positive control, HDMECs were stimulated with either TNF- or IL-1β for 4 hours in the absence (C) or presence of the corresponding soluble receptor antagonist.