title: Interleukin 1 receptor antagonist inhibits the augmentation of metastasis induced by interleukin 1 or lipopolysaccharide in a human melanoma/nude mouse system.
abstract: This study examined the ability of the recombinant human interleukin 1 receptor antagonist (IL-1ra) to block interleukin 1 (IL-1)-mediated experimental metastases from the A375M human melanoma. In vivo, IL-1ra administrated at concentrations > or = 200 times IL-1 significantly inhibited the increase in lung colonies induced by IL-1 in nude mice. The response to IL-1 was significantly inhibited when IL-1ra was administered simultaneously with or 1 to 3 h before IL-1. In vitro, the incubation of IL-1-activated endothelial cells with IL-1ra prevented the increase in adhesion of A375M melanoma cells. At the same experimental conditions, IL-1ra inhibited the augmented expression of the intracellular and vascular cell adhesion molecules 1 and E-selectin induced by IL-1 on endothelial cells. Lipopolysaccharide, an IL-1 inducer, increased the number of lung colonies in nude mice. IL-1ra injected with or 1 h after lipopolysaccharide inhibited this augmentation, suggesting a role for host-produced IL-1 in metastasis formation.
authors.affiliation: Mario Negri Institute for Pharmacological Research, Bergamo, Italy.
authors.forename: R G
authors.initials: RG
authors.lastname: Chirivi
authors.forename: A
authors.initials: A
authors.lastname: Garofalo
authors.forename: I M
authors.initials: IM
authors.lastname: Padura
authors.forename: A
authors.initials: A
authors.lastname: Mantovani
authors.forename: R
authors.initials: R
authors.lastname: Giavazzi
mesh_terms: D000818:Animals; D016588:Anticarcinogenic Agents / Q000627:therapeutic use*; D002460:Cell Line; D005260:Female; D006801:Humans; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1 / Q000633:toxicity*; D008070:Lipopolysaccharides / Q000633:toxicity*; D008175:Lung Neoplasms / Q000517:prevention & control* / Q000556:secondary*; D008545:Melanoma / Q000473:pathology*; D051379:Mice; D008819:Mice, Nude; D009362:Neoplasm Metastasis / Q000517:prevention & control*; D011994:Recombinant Proteins / Q000627:therapeutic use / Q000633:toxicity; D012795:Sialoglycoproteins / Q000627:therapeutic use*; D014183:Transplantation, Heterologous; D014407:Tumor Cells, Cultured
chemical_list: D016588:Anticarcinogenic Agents; C507763:IL1RN protein, human; C507764:Il1rn protein, mouse; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1; D008070:Lipopolysaccharides; D011994:Recombinant Proteins; D012795:Sialoglycoproteins