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Study on the relationship between NB4 cell apoptosis induced by tanshinone IIA and the cell mitochondrial

Wentong Meng1, Yiming Yang, Chengqi Deng

  • 1Department of Hematology, Huaxi Hospital, Sichuan University, Chengdu 610041, China.

Zhonghua Xue Ye Xue Za Zhi = Zhonghua Xueyexue Zazhi
|November 2, 2002
PubMed
Abstract

Insights

Tanshinone IIA induces apoptosis in NB4 cells by affecting mitochondrial potential. This effect, linked to opening the mitochondrial permeability transition pore, can be partially blocked by cyclosporine A.

Area of Science:

  • Cell Biology
  • Pharmacology
  • Mitochondrial Research

Background:

  • Apoptosis is a critical cellular process.
  • Mitochondrial transmembrane potential (ΔPsim) plays a key role in apoptosis.
  • Tanshinone IIA (TanIIA) is a compound with potential anti-cancer properties.

Purpose of the Study:

  • To investigate the relationship between TanIIA-induced apoptosis in NB4 cells and ΔPsim.
  • To elucidate the mechanism of TanIIA-induced apoptosis in NB4 cells.

Main Methods:

  • NB4 cells were treated with TanIIA, with or without cyclosporine A (CsA).
  • Morphological changes were assessed using light and transmission electron microscopy.
  • Apoptosis (sub-G1 cells) and ΔPsim were quantified by flow cytometry.

Main Results:

  • TanIIA treatment induced classical apoptotic morphology in NB4 cells.
  • TanIIA significantly increased sub-G1 cell percentages and reduced ΔPsim (P < 0.01).
  • A linear correlation was observed between increased sub-G1 cells and reduced ΔPsim.
  • CsA partially inhibited TanIIA-induced increases in sub-G1 cells and decreases in ΔPsim (P < 0.01).

Conclusions:

  • TanIIA induces NB4 cell apoptosis via opening of the mitochondrial permeability transition pore, leading to reduced ΔPsim.
  • Cyclosporine A can partially inhibit the apoptotic effects of TanIIA in NB4 cells.

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