: Trabectedin is used for the treatment of advanced soft tissue sarcomas (STSs). In this study, we evaluated if trabectedin could enhance the efficacy of irradiation (IR) by increasing the intrinsic cell radiosensitivity and modulating tumor micro-environment in fibrosarcoma (HS 93.T), leiomyosarcoma (HS5.T), liposarcoma (SW872), and rhabdomyosarcoma (RD) cell lines. A significant reduction in cell surviving fraction (SF) following trabectedin + IR compared to IR alone was observed in liposarcoma and leiomyosarcoma (enhancement ratio at 50%, ER50: 1.45 and 2.35, respectively), whereas an additive effect was shown in rhabdomyosarcoma and fibrosarcoma. Invasive cells' fraction significantly decreased following trabectedin ± IR compared to IR alone. Differences in cell cycle distribution were observed in leiomyosarcoma and rhabdomyosarcoma treated with trabectedin + IR. In all STS lines, trabectedin + IR resulted in a significantly higher number of γ-H2AX (histone H2AX) foci 30 min compared to the control, trabectedin, or IR alone. Expression of ATM, RAD50, Ang-2, VEGF, and PD-L1 was not significantly altered following trabectedin + IR. In conclusion, trabectedin radiosensitizes STS cells by affecting SF (particularly in leiomyosarcoma and liposarcoma), invasiveness, cell cycle distribution, and γ-H2AX foci formation. Conversely, no synergistic effect was observed on DNA damage repair, neoangiogenesis, and immune system.

Radiosensitizing Effect of Trabectedin on Human Soft Tissue Sarcoma Cells / Loi, Mauro; Salvatore, Giulia; Aquilano, Michele; Greto, Daniela; Talamonti, Cinzia; Salvestrini, Viola; Melica, Maria Elena; Valzano, Marianna; Francolini, Giulio; Sottili, Mariangela; Santini, Costanza; Becherini, Carlotta; Campanacci, Domenico Andrea; Mangoni, Monica; Livi, Lorenzo. - In: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES. - ISSN 1422-0067. - ELETTRONICO. - 23:(2022), pp. 14305-14315. [10.3390/ijms232214305]

Radiosensitizing Effect of Trabectedin on Human Soft Tissue Sarcoma Cells

Loi, Mauro;Salvatore, Giulia;Aquilano, Michele;Greto, Daniela;Talamonti, Cinzia;Salvestrini, Viola;Melica, Maria Elena;Valzano, Marianna;Francolini, Giulio;Sottili, Mariangela;Santini, Costanza;Becherini, Carlotta;Campanacci, Domenico Andrea;Mangoni, Monica;Livi, Lorenzo
2022

Abstract

: Trabectedin is used for the treatment of advanced soft tissue sarcomas (STSs). In this study, we evaluated if trabectedin could enhance the efficacy of irradiation (IR) by increasing the intrinsic cell radiosensitivity and modulating tumor micro-environment in fibrosarcoma (HS 93.T), leiomyosarcoma (HS5.T), liposarcoma (SW872), and rhabdomyosarcoma (RD) cell lines. A significant reduction in cell surviving fraction (SF) following trabectedin + IR compared to IR alone was observed in liposarcoma and leiomyosarcoma (enhancement ratio at 50%, ER50: 1.45 and 2.35, respectively), whereas an additive effect was shown in rhabdomyosarcoma and fibrosarcoma. Invasive cells' fraction significantly decreased following trabectedin ± IR compared to IR alone. Differences in cell cycle distribution were observed in leiomyosarcoma and rhabdomyosarcoma treated with trabectedin + IR. In all STS lines, trabectedin + IR resulted in a significantly higher number of γ-H2AX (histone H2AX) foci 30 min compared to the control, trabectedin, or IR alone. Expression of ATM, RAD50, Ang-2, VEGF, and PD-L1 was not significantly altered following trabectedin + IR. In conclusion, trabectedin radiosensitizes STS cells by affecting SF (particularly in leiomyosarcoma and liposarcoma), invasiveness, cell cycle distribution, and γ-H2AX foci formation. Conversely, no synergistic effect was observed on DNA damage repair, neoangiogenesis, and immune system.
2022
23
14305
14315
Loi, Mauro; Salvatore, Giulia; Aquilano, Michele; Greto, Daniela; Talamonti, Cinzia; Salvestrini, Viola; Melica, Maria Elena; Valzano, Marianna; Francolini, Giulio; Sottili, Mariangela; Santini, Costanza; Becherini, Carlotta; Campanacci, Domenico Andrea; Mangoni, Monica; Livi, Lorenzo
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1301489
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