title: Photodynamic therapy with ATX-S10.Na(II) inhibits synovial sarcoma cell growth.
abstract: Photodynamic therapy (PDT) is an effective cancer treatment modality that allows selective destruction of malignant tumor cells. We asked whether PDT could inhibit in vivo and in vitro growth of synovial sarcoma cells. We analyzed PDT using ATX-S10.Na(II) and a diode laser for a synovial sarcoma cell line (SYO-1). Photodynamic therapy with ATX-S10.Na(II) showed an in vitro cytotoxic effect on the cultured SYO-1 cells. The in vitro effect of PDT depended on the treatment concentration of ATX-S10.Na(II) and the laser dose of irradiation. ATX-S10.Na(II) was detected in the tumor tissue specimens that were excised from nude mice bearing SYO-1 within 6 hours after intravenous injection, but it was eliminated from the tumor 12 hours after injection. Photodynamic therapy suppressed the tumor growth of nude mice bearing SYO-1, and high-dose irradiation induced no viable tumor cells in histologic specimens. Photodynamic therapy performed after marginal resection of the tumor of nude mice bearing SYO-1 reduced the rate of local recurrence of the tumor. Our results suggest PDT using ATX-S10.Na(II) and laser irradiation may be a potentially useful treatment for synovial sarcoma, especially to reduce the surgical margin and preserve critical anatomic structures adjacent to the tumor.
authors.affiliation: Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Takeda
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Kunisada
authors.forename: Shinichi
authors.initials: S
authors.lastname: Miyazawa
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nakae
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Ozaki
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000528:radiation effects; D004195:Disease Models, Animal; D051379:Mice; D008819:Mice, Nude; D010778:Photochemotherapy; D017319:Photosensitizing Agents / Q000627:therapeutic use; D011166:Porphyrins / Q000627:therapeutic use; D013584:Sarcoma, Synovial / Q000188:drug therapy*; D023041:Xenograft Model Antitumor Assays
chemical_list: C115550:ATX-S10; D017319:Photosensitizing Agents; D011166:Porphyrins