Yanina Bellizzi1, Patricia G Cornier2, Carina M L Delpiccolo2, Ernesto G Mata2, Viviana Blank1, Leonor P Roguin3. 1. Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Laboratorio de Oncología y Transducción de Señales, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Junín 956, C1113AAD, Buenos Aires, Argentina. 2. Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Instituto de Química Rosario (CONICET-UNR), Suipacha 531, 2000, Rosario, Argentina. 3. Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Laboratorio de Oncología y Transducción de Señales, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Junín 956, C1113AAD, Buenos Aires, Argentina. rvroguin@qb.ffyb.uba.ar.
Abstract
PURPOSE: To investigate the effect of TAP7f, a penicillin derivative previously characterized as a potent antitumor agent that promotes ER stress and apoptosis, in combination with thapsigargin, an ER stress inducer, on melanoma cells. METHODS: The synergistic antiproliferative effect of TAP7f in combination with thapsigargin was studied in vitro in murine B16-F0 melanoma cells, and in human A375 and SB2 melanoma cells. In vivo assays were performed with C57BL/6J mice challenged with B16-F0 cells. Immunofluorescence and Western blot assays were carried out to characterize the induction of ER stress and apoptosis. Necrotic tumor areas and the potential toxicity of the combined therapy were examined by histological analysis of tissue sections after hematoxylin-eosin staining. RESULTS: In vitro, the combination of TAP7f with thapsigargin synergistically inhibited the proliferation of murine B16-F0, and human A375 and SB2 melanoma cells. When non-inhibitory doses of each drug were simultaneously administered to C57BL/6J mice challenged with B16-F0 cells, a 50% reduction in tumor volumes was obtained in the combined group. An apoptotic response characterized by higher expression levels of Baxenhanced PARP-1 cleavage and the presence of active caspase 3 was observed in tumors from the combined treatment. In addition, higher expression levels of GADD153/CHOP and ATF4 were found in tumors of mice treated with both drugs with respect to each drug used alone, indicating the induction of an ER stress response. No signs of tissue toxicity were observed in histological sections of different organs extracted from mice receiving the combination. CONCLUSION: The synergistic and effective antitumor action of TAP7f in combination with thapsigargin could be considered as a potential therapeutic strategy for melanoma treatment.
PURPOSE: To investigate the effect of TAP7f, a penicillin derivative previously characterized as a potent antitumor agent that promotes ER stress and apoptosis, in combination with thapsigargin, an ER stress inducer, on melanoma cells. METHODS: The synergistic antiproliferative effect of TAP7f in combination with thapsigargin was studied in vitro in murine B16-F0 melanoma cells, and in human A375 and SB2 melanoma cells. In vivo assays were performed with C57BL/6J mice challenged with B16-F0 cells. Immunofluorescence and Western blot assays were carried out to characterize the induction of ER stress and apoptosis. Necrotic tumor areas and the potential toxicity of the combined therapy were examined by histological analysis of tissue sections after hematoxylin-eosin staining. RESULTS: In vitro, the combination of TAP7f with thapsigargin synergistically inhibited the proliferation of murine B16-F0, and human A375 and SB2 melanoma cells. When non-inhibitory doses of each drug were simultaneously administered to C57BL/6J mice challenged with B16-F0 cells, a 50% reduction in tumor volumes was obtained in the combined group. An apoptotic response characterized by higher expression levels of Baxenhanced PARP-1 cleavage and the presence of active caspase 3 was observed in tumors from the combined treatment. In addition, higher expression levels of GADD153/CHOP and ATF4 were found in tumors of mice treated with both drugs with respect to each drug used alone, indicating the induction of an ER stress response. No signs of tissue toxicity were observed in histological sections of different organs extracted from mice receiving the combination. CONCLUSION: The synergistic and effective antitumor action of TAP7f in combination with thapsigargin could be considered as a potential therapeutic strategy for melanoma treatment.
Authors: Viviana Blank; Yanina Bellizzi; Elsa Zotta; Patricia G Cornier; Carina M L Delpiccolo; Dora B Boggián; Ernesto G Mata; Leonor P Roguin Journal: Anticancer Drugs Date: 2018-06 Impact factor: 2.248
Authors: Yanina Bellizzi; Juan Manuel Anselmi Relats; Patricia G Cornier; Carina M L Delpiccolo; Ernesto G Mata; Florencia Cayrol; Graciela A Cremaschi; Viviana C Blank; Leonor P Roguin Journal: Apoptosis Date: 2021-11-12 Impact factor: 4.677
Authors: Li Hua Chen; Chen Chen Jiang; Kelly A Kiejda; Yu Fang Wang; Rick F Thorne; Xu Dong Zhang; Peter Hersey Journal: Carcinogenesis Date: 2007-07-25 Impact factor: 4.944
Authors: Elizabeth Barrionuevo; Florencia Cayrol; Graciela A Cremaschi; Patricia G Cornier; Dora B Boggián; Carina M L Delpiccolo; Ernesto G Mata; Leonor P Roguin; Viviana C Blank Journal: Front Pharmacol Date: 2020-02-25 Impact factor: 5.810