SIRT2 mediates multidrug resistance in acute myelogenous leukemia cells via ERK1/2 signaling pathway

  • Authors:
    • Hua Xu
    • Yuanye Li
    • Long Chen
    • Chijuan Wang
    • Qi Wang
    • Hairui Zhang
    • Yani Lin
    • Qinghua Li
    • Tianxiang Pang
  • View Affiliations

  • Published online on: December 7, 2015     https://doi.org/10.3892/ijo.2015.3275
  • Pages: 613-623
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

SIRT2, one of nicotinamide adenine dinucleotide (NAD+)-dependent class Ⅲ histone deacetylase family proteins, has been found to be involved in the proliferation and survival of acute myeloid leukemia (AML) cells. However, its effect on drug resistance on chemoresistant AML cells is unclear. In the present study, we first found that SIRT2 was expressed at higher level in the relapsed AML patients than the newly diagnosed patients. Consistent with this observation, the expression level of SIRT2 was higher in HL60/A cells than that in HL60 cells. Depletion of SIRT2 by shRNAs in HL60/A cells resulted in decreased MRP1 level, enhanced drug accumulation and triggered more apoptosis. By contrast, overexpression of SIRT2 in HL60 cells led to increased MRP1 level, drug efflux and attenuated drug sensitivity. Moreover, the decreased expression of phosphorylated ERK1/2 was detected in SIRT2-depleted HL60/A cells and increased expression of phosphorylated ERK1/2 was observed in SIRT2 overexpressed HL60 cells. Furthermore, blockage of ERK1/2 signaling pathway with the chemical inhibitor PD98059, further induced apoptosis of HL60/A cells conferred by SIRT2 depletion. Importantly, ERK1/2 inhibition was able to reverse the drug resistance of HL60 conferred by SIRT2 overexpression. Thus, our findings collectively suggested that the expression level of SIRT2 has a positive relationship with DNR/Ara-C resistance and activity of ERK1/2 signaling pathway. SIRT2 might regulate DNR/Ara-C sensitivity in AML cells at least partially through the ERK1/2 pathway.
View Figures
View References

Related Articles

Journal Cover

February 2016
Volume 48 Issue 2

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

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
APA
Xu, H., Li, Y., Chen, L., Wang, C., Wang, Q., Zhang, H. ... Pang, T. (2016). SIRT2 mediates multidrug resistance in acute myelogenous leukemia cells via ERK1/2 signaling pathway. International Journal of Oncology, 48, 613-623. https://doi.org/10.3892/ijo.2015.3275
MLA
Xu, H., Li, Y., Chen, L., Wang, C., Wang, Q., Zhang, H., Lin, Y., Li, Q., Pang, T."SIRT2 mediates multidrug resistance in acute myelogenous leukemia cells via ERK1/2 signaling pathway". International Journal of Oncology 48.2 (2016): 613-623.
Chicago
Xu, H., Li, Y., Chen, L., Wang, C., Wang, Q., Zhang, H., Lin, Y., Li, Q., Pang, T."SIRT2 mediates multidrug resistance in acute myelogenous leukemia cells via ERK1/2 signaling pathway". International Journal of Oncology 48, no. 2 (2016): 613-623. https://doi.org/10.3892/ijo.2015.3275