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Autophagy Protects MC3T3-E1 Cells upon Aluminum-Induced Apoptosis.

Xu Yang1, Jian Zhang1, Qiang Ji1

  • 1Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, NO. 600 Changjiang Road, Harbin, 150030, China.

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|March 10, 2018
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Summary

Aluminum trichloride (AlCl3) exposure induces autophagy and apoptosis in osteoblast cells. Autophagy activation by rapamycin protected cells, suggesting it may treat aluminum-induced bone disease.

Keywords:
AluminumApoptosisAutophagyMC3T3-E1 cell

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Toxicology

Background:

  • Aluminum (Al) exposure negatively impacts osteoblasts.
  • This effect may involve autophagy-mediated apoptosis.

Purpose of the Study:

  • To investigate the role of autophagy in aluminum trichloride (AlCl3)-induced apoptosis in MC3T3-E1 osteoblast cells.
  • To explore autophagy activation as a potential therapeutic strategy for Al-induced bone disease.

Main Methods:

  • MC3T3-E1 cells were exposed to AlCl3.
  • Autophagy was assessed via monodansylcadaverine (MDC) staining and gene expression (ATG3, ATG5, ATG9).
  • Cell viability, apoptosis, and gene expression (Bcl-2, Bax, Caspase-3) were analyzed. Rapamycin was used to induce autophagy.

Main Results:

  • AlCl3 induced autophagy in MC3T3-E1 cells.
  • AlCl3 inhibited cell survival and promoted apoptosis.
  • Rapamycin-induced autophagy attenuated AlCl3-induced apoptosis.

Conclusions:

  • Autophagy plays a protective role against AlCl3-induced apoptosis in osteoblasts.
  • Activating autophagy could be a therapeutic approach for aluminum-induced bone diseases.