Tin tungstate nanoparticles

• Verfasst von: Seidl, Carmen [VerfasserIn]
• Verfasst von: Sleeman, Jonathan P. [VerfasserIn]
• Titel: Tin tungstate nanoparticles
• Titelzusatz: a photosensitizer for photodynamic tumor therapy
• Verf.angabe: Carmen Seidl, Jan Ungelenk, Eva Zittel, Thomas Bergfeldt, Jonathan P. Sleeman, Ute Schepers, and Claus Feldmann
• E-Jahr: 2016
• Jahr: February 19, 2016
• Umfang: 9 S.
• Fussnoten: Gesehen am 15.03.2019
• Titel Quelle: Enthalten in: American Chemical SocietyACS nano
• Ort Quelle: Washington, DC : Soc., 2007
• Jahr Quelle: 2016
• Band/Heft Quelle: 10(2016), 3, Seite 3149-3157
• ISSN Quelle: 1936-086X
• DOI: doi:10.1021/acsnano.5b03060
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1590346068

Abstract

The nanoparticulate inorganic photosensitizer β-SnWO4 is suggested for photodynamic therapy (PDT) of near-surface tumors via reiterated 5 min blue-light LED illumination. β-SnWO4 nanoparticles are obtained via water-based synthesis and comprise excellent colloidal stability under physiological conditions and high biocompatibility at low material complexity. Antitumor and antimetastatic effects were investigated with a spontaneously metastasizing (4T1 cells) orthotopic breast cancer BALB/c mouse model. Besides protamine-functionalized β-SnWO4 (23 mg/kg of body weight, in PBS buffer), chemotherapeutic doxorubicin was used as positive control (2.5 mg/kg of body weight, in PBS buffer) and physiological saline (DPBS) as a negative control. After 21 days, treatment with β-SnWO4 resulted in a clearly inhibited growth of the primary tumor (all tumor volumes below 3 cm3) as compared to the doxorubicin and DPBS control groups (volumes up to 6 cm3). Histological evaluations of lymph nodes and lungs as well as the volume of ipsilateral lymph nodes show a remarkable antimetastatic effect being similar to chemotherapeutic doxorubicin but - according to blood counts - at significantly reduced side effects. On the basis of low material complexity, high cytotoxicity under blue-light LED illumination at low dark and long-term toxicity, β-SnWO4 can be an interesting addition to PDT and the treatment of near-surface tumors, including skin cancer, esophageal/gastric/colon tumors as well as certain types of breast cancer.