Home Neoplasma 2007 Neoplasma Vol.54, p.463-470, 2007

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Founded: 1954
ISSN 0028-2685
ISSN 1338-4317 (online)

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Neoplasma Vol.54, p.463-470, 2007

Title: Comparison of inhibition of murine leukaemia cell growth by 9-isothiocyanatoacridine and its cytosine adduct: involvement of thiols
Author: M. BAJDICHOVA, H. PAULIKOVA, J. JAKUBIKOVA, D. SABOLOVA

Abstract: Cytotoxicity of two fluorescent acridine derivatives – 9-isothiocyanatoacridine (AcITC) and N-(9-acridinylthiocarbamoyl) cytosine (AcTCC) – a novel acridine compound, were investigated. Both substances have cytotoxic activity against the L1210 cellular line, IC50 values were in the micromolar range. Despite the high reactivity of AcITC towards thiols, its effects on leukemia cells were similar to naturally occurring isothiocyanates. AcITC changed the intracellular level of glutathione (GSH), and induced apoptosis. Arrest of cell cycle (G2/M-phase) was also observed. AcITC primarily reacted with -SH groups on cellular surface, and the study of the interaction of the isotiocyanate with human erythrocyte ghosts confirmed that the plasma membrane was the first place where AcITC bound. AcTCC does not react with cellular thiols; images obtained with fluorescent microscopy confirmed interaction of AcTCC with chromatine. Although AcTCC induced cellular arrest in the G2/M phase, apoptosis was not confirmed.

Keywords: glutathione; thiols; isothiocyanate; growth inhibition; apoptosis
Year: 2007, Volume: 54, Issue: Page From: 463, Page To: 470



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