title: Targeted chemotherapy against intraperitoneally disseminated colon carcinoma using a cationized gelatin-conjugated HVJ envelope vector.
abstract: The hemagglutinating virus of Japan envelope (HVJ-E; Sendai virus) vector derived from inactivated HVJ particles can be used to deliver DNA, proteins, and drugs into cells both in vitro and in vivo. HVJ-E is capable of delivering bleomycin, an anticancer drug, to various cancer cell lines, thereby producing 300-fold greater cytotoxicity than administration of bleomycin alone. In a mouse model of peritoneally disseminated colon cancer, we injected HVJ-E containing the luciferase gene into the peritoneum. Unexpectedly, luciferase gene expression was not observed within the tumor deposits or any organs. However, when combined with cationized gelatin (CG), CG-HVJ-E produced a high level of luciferase gene expression primarily within the tumor deposits. Forty-eight hours after introducing colon cancer cells into the peritoneum of experimental mice, CG-HVJ-E with or without bleomycin was injected into the abdominal cavity. Following six injections of bleomycin-incorporated CG-HVJ-E, complete responses were observed in 40% of the mice examined. All of the mice that received either empty CG-HVJ-E or bleomycin alone died within 40 days of having cancer cells introduced into the peritoneum. When the mice with complete responses were rechallenged with colon cancer cells from the same cell line, no tumors developed. Thus, CG-HVJ-E may suppress peritoneal dissemination of cancer.
authors.affiliation: Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Mima
authors.forename: Seiji
authors.initials: S
authors.lastname: Yamamoto
authors.forename: Makoto
authors.initials: M
authors.lastname: Ito
authors.forename: Ryuji
authors.initials: R
authors.lastname: Tomoshige
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Tabata
authors.forename: Katsuto
authors.initials: K
authors.lastname: Tamai
authors.forename: Yasufumi
authors.initials: Y
authors.lastname: Kaneda
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000627:therapeutic use*; D001761:Bleomycin / Q000008:administration & dosage / Q000627:therapeutic use*; D002417:Cattle / Q000821:virology; D002470:Cell Survival / Q000187:drug effects; D016503:Drug Delivery Systems; D004705:Endocytosis / Q000187:drug effects / Q000502:physiology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009374:Neoplasms, Experimental / Q000188:drug therapy* / Q000473:pathology; D029082:Sendai virus / Q000302:isolation & purification
chemical_list: D000970:Antineoplastic Agents; D001761:Bleomycin