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Dynamic influence of Rhein lysinate on HeLa cells.

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Rhein lysinate (RHL) inhibits HeLa cell proliferation by damaging mitochondria and endoplasmic reticulum, leading to apoptosis. This study details the dynamic process of RHL-induced cell death.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Toxicology

Background:

  • Rhein lysinate (RHL) previously showed inhibition of HeLa cell proliferation.
  • The specific mechanism underlying RHL's effect on cell growth remained unclear.

Purpose of the Study:

  • To elucidate the mechanism of RHL-induced HeLa cell inhibition.
  • To investigate RHL's impact on mitochondrial damage and cellular apoptosis.

Main Methods:

  • Transmission electron microscopy (TEM) for ultrastructure analysis.
  • Mitochondrial membrane potential assays and reactive oxygen species (ROS) generation measurement.
  • Mitochondrial proteome analysis, Hoechst staining, flow cytometry, and Western blotting.

Main Results:

  • RHL induced dose- and time-dependent vacuolization in HeLa cells, identified as damaged mitochondria and endoplasmic reticulum.
  • RHL treatment decreased mitochondrial membrane potential and increased ROS generation.
  • Apoptosis was observed approximately 24 hours after RHL treatment, with decreased expression of keratin and dermal papilla derived protein 12.

Conclusions:

  • RHL inhibits HeLa cell proliferation through mitochondrial and endoplasmic reticulum damage.
  • The toxicity of RHL to HeLa cells is a dynamic process involving initial vacuolar degeneration followed by apoptosis.
  • RHL affects key proteins involved in mitochondrial structure and function, contributing to cell death.