title: Further development of local IL-2 therapy of cancer: multiple versus single IL-2 treatment of transplanted murine colon carcinoma.
abstract: We have compared the effect of one and up to four local IL-2 treatments of transplanted MC38 colon carcinoma. A single IL-2 treatment prolonged the survival time ( p=0.015), but no cure was obtained. One local IL-2 treatment inhibited tumor growth for about 1 week. After the start of tumor regrowth, a further IL-2 injection was given. After four IL-2 injections 6 out of 13 mice were cured. Histological studies show that IL-2 induced a local vascular leakage syndrome leading to massive peritumoral edema and subsequent necrosis of tumor tissue. IL-2 also attracted infiltrating cells, mainly macrophages. Subsequent IL-2 injections led to complete tumor regression. We believe that the combination of necrotic tumor debris and the IL-2-induced macrophage reaction enhanced a tumor-specific immune response. This local IL-2 application was not toxic.
authors.affiliation: Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla St. 12, 53-114 Warsaw, Poland. hkusnier@immuno.iitd.pan.wroc.pl
authors.forename: Halina
authors.initials: H
authors.lastname: Kusnierczyk
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Pajtasz-Piasecka
authors.forename: Jan-Willem
authors.initials: JW
authors.lastname: Koten
authors.forename: Caspaar
authors.initials: C
authors.lastname: Bijleveld
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Krawczyk
authors.forename: Willem
authors.initials: W
authors.lastname: Den Otter
mesh_terms: D000818:Animals; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000473:pathology; D004305:Dose-Response Relationship, Drug; D005260:Female; D007376:Interleukin-2 / Q000008:administration & dosage* / Q000494:pharmacology; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D009374:Neoplasms, Experimental / Q000188:drug therapy* / Q000473:pathology; D009569:Nitric Oxide / Q000378:metabolism; D014407:Tumor Cells, Cultured / Q000637:transplantation
chemical_list: D007376:Interleukin-2; D009569:Nitric Oxide