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Effect of taxol on chromosome aberrations induced by gamma radiation or by doxorubicin in Chinese hamster ovary cells
Francisco da Luz DiasI,II; Lusânia M.G. AntunesII; Catarina S. TakahashiI,II
IDepartamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, SP, Brasil.
IIDepartamento de Genética, Bloco G, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14049-900 Ribeirão Preto, SP, Brasil. E-mail: fldias@spider.usp.br. Send correspondence to F.L.D.
ABSTRACT
Combined therapy with radiation and chemotherapy has being increasingly used in cancer treatment. The effect of combinations of taxol (0.08 µg/ml) with doxorubicin (DXR, 0.5 or 1.0 µg/m1) or gamma radiation (20 or 40 cGy) was examined in two different treatment schedules (pretreatment or simultaneous treatment) using Chinese hamster ovary (CHO) cells treated at the G2 phase of the cell cycle. The results showed that taxol did not have a radiosensitizing effect on the chromosomal aberrations induced by gamma radiation nor did it have a potentiating effect on the chromosomal aberrations induced by DXR in CHO cells treated in the G2 phase of the cell cycle.
Keywords: taxol; chromosome aberrations; gamma radiation; doxorubicin; Chinese hamster.
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