Enhancement of differentiation induction and upregulation of CCAAT/enhancer-binding proteins and PU.1 in NB4 cells treated with combination of ATRA and valproic acid

  • Authors:
    • Noriyoshi Iriyama
    • Bo Yuan
    • Yuta Yoshino
    • Yoshihiro Hatta
    • Akira Horikoshi
    • Shin Aizawa
    • Masami Takei
    • Jin Takeuchi
    • Norio Takagi
    • Hiroo Toyoda
  • View Affiliations

  • Published online on: December 30, 2013     https://doi.org/10.3892/ijo.2013.2236
  • Pages: 865-873
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

The effects of all-trans retinoic acid (ATRA) and valproic acid (VPA), alone and in combination, on the human acute promyelocytic leukemia (APL) cell line NB4 were investigated in view of differentiation induction and growth inhibition. After 48 h of treatment, not only ATRA but also VPA induced differentiation in NB4 cells, and their combination further augmented the differentiation activity. Furthermore, the upregulation of transcription factors including CCAAT/enhancer-binding proteins (CEBPα, β, ε) and PU.1, which are known to be critical factors for normal myelopoiesis, granulocytic maturation and being repressed in APL, concurred with the differentiation induction. A significant cell growth inhibition was observed after the treatment with VPA, which was further strengthened by the addition of ATRA. Given the importance of C/EBPs and PU.1 in myeloid development, these results, thus, suggest that restoration of the normal function of the myeloid cell transcriptional machinery is a major molecular mechanism underlying the differentiation induction in NB4. Therefore, these results may provide novel insights into a possible combinational therapeutic approach for APL patients.
View Figures
View References

Related Articles

Journal Cover

2014-March
Volume 44 Issue 3

Print ISSN: 1019-6439
Online ISSN:1791-2423

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Iriyama N, Yuan B, Yoshino Y, Hatta Y, Horikoshi A, Aizawa S, Takei M, Takeuchi J, Takagi N, Toyoda H, Toyoda H, et al: Enhancement of differentiation induction and upregulation of CCAAT/enhancer-binding proteins and PU.1 in NB4 cells treated with combination of ATRA and valproic acid. Int J Oncol 44: 865-873, 2014
APA
Iriyama, N., Yuan, B., Yoshino, Y., Hatta, Y., Horikoshi, A., Aizawa, S. ... Toyoda, H. (2014). Enhancement of differentiation induction and upregulation of CCAAT/enhancer-binding proteins and PU.1 in NB4 cells treated with combination of ATRA and valproic acid. International Journal of Oncology, 44, 865-873. https://doi.org/10.3892/ijo.2013.2236
MLA
Iriyama, N., Yuan, B., Yoshino, Y., Hatta, Y., Horikoshi, A., Aizawa, S., Takei, M., Takeuchi, J., Takagi, N., Toyoda, H."Enhancement of differentiation induction and upregulation of CCAAT/enhancer-binding proteins and PU.1 in NB4 cells treated with combination of ATRA and valproic acid". International Journal of Oncology 44.3 (2014): 865-873.
Chicago
Iriyama, N., Yuan, B., Yoshino, Y., Hatta, Y., Horikoshi, A., Aizawa, S., Takei, M., Takeuchi, J., Takagi, N., Toyoda, H."Enhancement of differentiation induction and upregulation of CCAAT/enhancer-binding proteins and PU.1 in NB4 cells treated with combination of ATRA and valproic acid". International Journal of Oncology 44, no. 3 (2014): 865-873. https://doi.org/10.3892/ijo.2013.2236