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Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells

  • Authors:
    • Syu-Ichi Kanno
    • Naoyuki Maeda
    • Ayako Tomizawa
    • Shin Yomogida
    • Tadashi Katoh
    • Masaaki Ishikawa
  • View Affiliations / Copyright

    Affiliations: Department of Clinical Pharmacotherapeutics, Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan, Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan
    Copyright: © Kanno et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 862-868
    |
    Published online on: June 6, 2012
       https://doi.org/10.3892/ijo.2012.1507
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Abstract

We previously showed that the B cell leukemia cell line NALM-6 had the highest susceptibility among a number of leukemia cell lines to spiruchostatin B (SP-B), a potent histone deacetylase (HDAC) inhibitor. We also showed that SP-B-induced cytotoxicity depended on induction of apoptosis that was mediated by p21waf1/cip1 expression. In the present study, we generated and characterized a stable, SP-B-resistant NALM-6 cell line (NALM-6/SP-B) by continuous exposure to SP-B, starting with a low SP-B concentration. NALM-6/SP-B cells were also more resistant to FK228, which has a similar chemical structure to SP-B, and were slightly more resistant to the P-gp substrates doxorubicin and vincristine than parental cells, but displayed similar susceptibility to other HDAC inhibitors and to paclitaxel as the parental cells. There was little change in the basal mRNA expression of HDAC1, p53, Bax, Bcl-2, Fas, caspase-3, c-Myc and MDR1 in NALM-6/SP-B compared to parental cells, but the mRNA expression of p21waf1/cip1 was decreased. The introduction of an exogenous p21waf1/cip1 expression vector restored SP-B induction of NALM-6/SP-B cell apoptosis. Moreover, overexpressed p21waf1/cip1 enhanced SP-B induction of the apoptosis of the human erythroleukemia leukemia cell line K562 which is less susceptible to SP-B than NALM-6 cells. These results suggest that downregulation of p21waf1/cip1, which is a characteristic feature of NALM-6/SP-B cells, was important for their resistance to SP-B, and that this SP-B resistance could be overcome by the introduction of exogenous p21waf1/cip1. Furthermore, introduction of p21waf1/cip1 to other leukemia cells such as K562 may enhance their susceptibility to SP-B. This is the first report of the characterization of SP-B-resistant cells and of the effect of overexpressed p21waf1/cip1 on the resistance or susceptibility of human leukemia cells to SP-B.
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Copy and paste a formatted citation
Spandidos Publications style
Kanno S, Maeda N, Tomizawa A, Yomogida S, Katoh T and Ishikawa M: Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells. Int J Oncol 41: 862-868, 2012.
APA
Kanno, S., Maeda, N., Tomizawa, A., Yomogida, S., Katoh, T., & Ishikawa, M. (2012). Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells. International Journal of Oncology, 41, 862-868. https://doi.org/10.3892/ijo.2012.1507
MLA
Kanno, S., Maeda, N., Tomizawa, A., Yomogida, S., Katoh, T., Ishikawa, M."Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells". International Journal of Oncology 41.3 (2012): 862-868.
Chicago
Kanno, S., Maeda, N., Tomizawa, A., Yomogida, S., Katoh, T., Ishikawa, M."Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells". International Journal of Oncology 41, no. 3 (2012): 862-868. https://doi.org/10.3892/ijo.2012.1507
Copy and paste a formatted citation
x
Spandidos Publications style
Kanno S, Maeda N, Tomizawa A, Yomogida S, Katoh T and Ishikawa M: Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells. Int J Oncol 41: 862-868, 2012.
APA
Kanno, S., Maeda, N., Tomizawa, A., Yomogida, S., Katoh, T., & Ishikawa, M. (2012). Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells. International Journal of Oncology, 41, 862-868. https://doi.org/10.3892/ijo.2012.1507
MLA
Kanno, S., Maeda, N., Tomizawa, A., Yomogida, S., Katoh, T., Ishikawa, M."Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells". International Journal of Oncology 41.3 (2012): 862-868.
Chicago
Kanno, S., Maeda, N., Tomizawa, A., Yomogida, S., Katoh, T., Ishikawa, M."Characterization of cells resistant to the potent histone deacetylase inhibitor spiruchostatin B (SP-B) and effect of overexpressed p21waf1/cip1 on the SP-B resistance or susceptibility of human leukemia cells". International Journal of Oncology 41, no. 3 (2012): 862-868. https://doi.org/10.3892/ijo.2012.1507
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