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[Effect of YM155 on Apoptosis and Autophagy of K562 Cells]

Yi-Han Ding1, Xiao-Dong Fan1, Jing-Jing Wu1

  • 1Department of Hematology, Huai'an First People's Hospital of Nanjing Medical University, Huai'an, 223300, Jiangsu province, China.

Zhongguo Shi Yan Xue Ye Xue Za Zhi
|May 8, 2015
PubMed
Abstract

Insights

YM155, a survivin inhibitor, effectively reduces K562 cell proliferation by triggering apoptosis and autophagy. Autophagy induction amplifies its cytotoxic impact, offering a potential therapeutic strategy.

Area of Science:

  • Cell biology
  • Molecular oncology
  • Pharmacology

Background:

  • Survivin is a key protein in cell survival and proliferation.
  • K562 cells are a human chronic myeloid leukemia cell line.
  • Apoptosis and autophagy are critical cellular processes involved in cell death.

Purpose of the Study:

  • To investigate the effects of YM155, a survivin inhibitor, on K562 cell apoptosis and autophagy.
  • To elucidate the molecular mechanisms underlying YM155's action.

Main Methods:

  • K562 cells were treated with varying concentrations of YM155.
  • Cell viability was assessed using CCK-8 assay.
  • Apoptosis was measured by flow cytometry.
  • Gene and protein expression of survivin, BCL-2, beclin1, caspase-3, PARP, and LC-3 were analyzed by RT-PCR and Western blot.

Main Results:

  • YM155 demonstrated time- and dose-dependent inhibition of K562 cell proliferation.
  • YM155 decreased survivin and BCL-2 expression while increasing caspase-3, PARP, beclin1, and LC-3 expression.
  • Combined treatment with YM155 and 3-MA (autophagy inhibitor) reduced LC-3 and caspase-3 levels.

Conclusions:

  • YM155 induces apoptosis and autophagy in K562 cells, leading to proliferation inhibition.
  • Autophagy induction by YM155 enhances its cytotoxic effects.
  • YM155 presents a potential therapeutic agent for targeting K562 leukemia.

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