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Article

RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells

  • Authors:
    • Babasaheb Yadav
    • Sebastien Taurin
    • Lesley Larsen
    • Rhonda J. Rosengren
  • View Affiliations / Copyright

    Affiliations: Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand, Department of Chemistry, University of Otago, Dunedin, New Zealand
  • Pages: 1119-1127
    |
    Published online on: June 15, 2012
       https://doi.org/10.3892/ijo.2012.1521
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Abstract

There is a need for the development of new, safe and efficacious drug therapies for the treatment of estrogen receptor (ER)-negative breast cancers. RL71 is a second-generation curcumin analog that exhibits potent cytotoxicity towards a variety of ER-negative breast cancer cells. Therefore, we have further examined the mechanism of this anticancer activity in three different ER-negative breast cancer cell lines. The mechanistic studies demonstrated that RL71 (1 µM) induced cell cycle arrest in the G2/M phase of the cell cycle. Moreover, RL71 (1 µM) caused 35% of SKBr3 cells to undergo apoptosis after 48 h and this effect was time-dependent. This correlated with an increase in cleaved caspase-3 as shown by western blotting. RL71 (1 µM) also decreased HER2/neu phosphorylation and increased p27 in SKBr3 cells. While in MDA-MB-231 and MDA-MB-468 cells RL71 (1 µM) significantly decreased Akt phosphorylation and transiently increased the stress kinases JNK1/2 and p38 MAPK. In addition, RL71 exhibited anti-angiogenic potential in vitro as it inhibited HUVEC cell migration and the ability of these cells to form tube-like networks. RL71 (8.5 mg/kg) was also orally bioavailable as it produced a peak plasma concentration of 0.405 µg/ml, 5 min after oral drug administration. Thus, our findings provide evidence that RL71 has potent anticancer activity and has potential to be further developed as a drug for the treatment of ER-negative breast cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Yadav B, Taurin S, Larsen L and Rosengren RJ: RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells. Int J Oncol 41: 1119-1127, 2012.
APA
Yadav, B., Taurin, S., Larsen, L., & Rosengren, R.J. (2012). RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells. International Journal of Oncology, 41, 1119-1127. https://doi.org/10.3892/ijo.2012.1521
MLA
Yadav, B., Taurin, S., Larsen, L., Rosengren, R. J."RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells". International Journal of Oncology 41.3 (2012): 1119-1127.
Chicago
Yadav, B., Taurin, S., Larsen, L., Rosengren, R. J."RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells". International Journal of Oncology 41, no. 3 (2012): 1119-1127. https://doi.org/10.3892/ijo.2012.1521
Copy and paste a formatted citation
x
Spandidos Publications style
Yadav B, Taurin S, Larsen L and Rosengren RJ: RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells. Int J Oncol 41: 1119-1127, 2012.
APA
Yadav, B., Taurin, S., Larsen, L., & Rosengren, R.J. (2012). RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells. International Journal of Oncology, 41, 1119-1127. https://doi.org/10.3892/ijo.2012.1521
MLA
Yadav, B., Taurin, S., Larsen, L., Rosengren, R. J."RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells". International Journal of Oncology 41.3 (2012): 1119-1127.
Chicago
Yadav, B., Taurin, S., Larsen, L., Rosengren, R. J."RL71, a second-generation curcumin analog, induces apoptosis and downregulates Akt in ER-negative breast cancer cells". International Journal of Oncology 41, no. 3 (2012): 1119-1127. https://doi.org/10.3892/ijo.2012.1521
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