Inhibition of neutrophil adherence to endothelial cells by 3-deazaadenosine.

Treatment of cultured human umbilical vein endothelial cells (HUVE) with tumor necrosis factor alpha (TNF-alpha) increases their capacity to adhere human neutrophils. We have found that 3-deazaadenosine (c3Ado), when added in conjunction with TNF-alpha, inhibited this increase in neutrophil adherence. This activity of c3Ado was potentiated by the addition of L-homocysteine thiolactone (Hcy). The ability of c3Ado to inhibit neutrophil adherence to HUVE may contribute to the anti-inflammatory activity of this nucleoside analogue.