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Dioscin induced activation of p38 MAPK and JNK via mitochondrial pathway in HL-60 cell line

Ying Wang1, Qing-Yu He2, Jen-Fu Chiu3

  • 1State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China.

European Journal of Pharmacology
|April 24, 2014
PubMed

Insights

Dioscin, a saponin, effectively inhibits leukemia cell growth by triggering apoptosis. This occurs through the activation of specific signaling pathways, suggesting its potential as a novel cancer therapy drug lead.

Area of Science:

  • Pharmacology
  • Molecular Biology
  • Cancer Research

Background:

  • Saponins show potential in cancer therapy, but their detailed mechanisms are unclear.
  • Understanding signaling pathways is crucial for developing novel anticancer agents.

Purpose of the Study:

  • To investigate the anticancer mechanisms of dioscin in human myeloblast leukemia HL-60 cells.
  • To elucidate the specific signaling pathways involved in dioscin's cytotoxic effects.

Main Methods:

  • Cell viability assays to assess growth inhibition.
  • Apoptosis assays including phosphatidylserine externalization and caspase activation.
  • Western blotting to detect protein phosphorylation (p38 MAPK, JNK) and cleavage (PARP-1, lamin A/C).
  • Mitochondrial function analysis using inhibitors and antioxidants.

Main Results:

  • Dioscin suppressed HL-60 cell growth dose-dependently.
  • Dioscin induced apoptosis via caspase activation (3, 7, 8, 9, 10) and mitochondrial pathway.
  • Mitochondrial reactive oxygen species and membrane potential loss mediated p38 MAPK and JNK phosphorylation.

Conclusions:

  • Dioscin induces apoptosis in leukemia cells through p38 MAPK and JNK activation via the mitochondrial pathway.
  • Dioscin's mechanism involves caspase-dependent signaling initiated by mitochondrial dysfunction.
  • Dioscin shows promise as a potential therapeutic agent for myeloblast leukemia.
Keywords:
ApoptosisDioscinMAPKMitochondriaReactive oxygen speciesSaponin

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