title: Suicide gene therapy for plasma cell tumors.
abstract: Suicide gene therapy for plasma cell tumors was attempted in severe combined immunodeficient (SCID) mice injected with human myeloma cell lines. Initially, a ganciclovir-induced bystander effect was observed in vitro using myeloma cells transduced with a herpes simplex thymidine kinase (HSVtk) gene. Transduced cells injected subcutaneously (SC) into SCID mice could be eradicated by the administration of ganciclovir (GCV). Furthermore, an in vivo bystander effect was noticed when mice received mixtures of HSVtk-positive and nontransduced cells. Unexpectedly, a "distant bystander" effect was observed as tumors in regions inoculated with only nontransduced cells were significantly smaller and had increased frequency of apoptotic figures and decreased mitotic frequency in GCV-treated mice transplanted with HSVtk-positive cells at a different region compared with control mice.
authors.affiliation: Department of Medicine, Karolinska Institute at Huddinge Hospital, Sweden.
authors.forename: M S
authors.initials: MS
authors.lastname: Dilber
authors.forename: M R
authors.initials: MR
authors.lastname: Abedi
authors.forename: B
authors.initials: B
authors.lastname: Björkstrand
authors.forename: B
authors.initials: B
authors.lastname: Christensson
authors.forename: G
authors.initials: G
authors.lastname: Gahrton
authors.forename: K G
authors.initials: KG
authors.lastname: Xanthopoulos
authors.forename: C I
authors.initials: CI
authors.lastname: Smith
mesh_terms: D000818:Animals; D002460:Cell Line; D015774:Ganciclovir / Q000627:therapeutic use; D015316:Genetic Therapy; D005822:Genetic Vectors; D006801:Humans; D007074:Immunoglobulin G / Q000096:biosynthesis; D051379:Mice; D016513:Mice, SCID; D009101:Multiple Myeloma / Q000628:therapy*; D009368:Neoplasm Transplantation; D010954:Plasmacytoma / Q000628:therapy*; D018139:Simplexvirus / Q000201:enzymology; D013937:Thymidine Kinase / Q000235:genetics; D014161:Transduction, Genetic; D014183:Transplantation, Heterologous
chemical_list: D007074:Immunoglobulin G; D013937:Thymidine Kinase; D015774:Ganciclovir