title: Antitumour effect of interferon combined with hyperthermia against experimental brain tumour.
abstract: Antiproliferative activity of recombinant murine interferon-beta (Rec-MuIFN-beta) combined with hyperthermia against Rous sarcoma virus-induced mouse malignant glioma (RSV glioma) was investigated both in vitro and in vivo. In vitro, the antiproliferative activity of Rec-MuIFN-beta was enhanced by incubation at elevated temperatures (40 degrees and 43 degrees C). In vivo, combined therapy of Rec-MuIFN-beta treatment and local tumour hyperthermia (43 degrees C) exerted a greater antitumour effect against transplanted RSV glioma in C3H/He mice than either treatment alone, especially when Rec-MuIFN-beta was administered intratumourally. Subsequently, in order to probe the mechanism of enhanced antiproliferative activity, the production of prostaglandin E2 (PGE2) and 2', 5'-oligoadenylate synthetase (2-5A synthetase) in the culture medium of RSV glioma cells was measured. Rec-MuIFN-beta treatment resulted in a significantly greater PGE2 and 2-5A synthetase production at 43 degrees C than at 37 degrees C.
mesh_terms: D015088:2',5'-Oligoadenylate Synthetase / Q000096:biosynthesis; D000818:Animals; D001932:Brain Neoplasms / Q000628:therapy*; D003131:Combined Modality Therapy; D015232:Dinoprostone; D004790:Enzyme Induction; D005910:Glioma / Q000378:metabolism / Q000628:therapy*; D006979:Hyperthermia, Induced; D007370:Interferon Type I / Q000627:therapeutic use*; D051379:Mice; D008809:Mice, Inbred C3H; D011458:Prostaglandins E / Q000096:biosynthesis; D011994:Recombinant Proteins / Q000627:therapeutic use; D014407:Tumor Cells, Cultured
chemical_list: D007370:Interferon Type I; D011458:Prostaglandins E; D011994:Recombinant Proteins; D015088:2',5'-Oligoadenylate Synthetase; D015232:Dinoprostone