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Related Experiment Videos

Cancer cell death by programmed necrosis?

Piet Borst1, Sven Rottenberg

  • 1Division of Molecular Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, Netherlands.

Drug Resistance Updates : Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
|March 26, 2005
PubMed
Summary

Alkylating agents induce cell death via programmed necrosis, driven by PARP activation, NAD+ depletion, and glycolysis inhibition. However, evidence for this mechanism in patients and its "programmed" nature requires further investigation.

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Area of Science:

  • Cellular biology
  • Molecular oncology
  • Biochemistry

Background:

  • Alkylating agents are chemotherapy drugs that induce DNA damage.
  • Zong et al. proposed a novel cell death mechanism termed "programmed necrosis" induced by these agents.
  • This process involves excessive poly(ADP-ribose) polymerase (PARP) activation, leading to nicotinamide adenine dinucleotide (NAD+) depletion and glycolysis inhibition.

Purpose of the Study:

  • To critically evaluate the proposed "programmed necrosis" mechanism.
  • To question the extent of NAD+ depletion and glycolysis inhibition in patients undergoing chemotherapy.
  • To explore alternative mechanisms of cancer cell hypersensitivity to DNA damage.

Main Methods:

  • Literature review and critical analysis of existing data.

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  • Biochemical pathway analysis.
  • Comparative analysis of cancer cell vulnerabilities.

    • Main Results:

    • The direct link between chemotherapy-induced NAD+ depletion and significant glycolysis inhibition in patients remains unclear.
    • The "programmed" aspect of the described necrosis requires more robust experimental evidence.
    • Cancer cells possess multiple pathways conferring hypersensitivity to DNA damage, beyond high aerobic glycolysis.

    Conclusions:

    • The proposed "programmed necrosis" model requires further validation, particularly regarding its relevance in clinical settings.
    • Alternative and complementary mechanisms contribute to cancer cell death following DNA damage.
    • The role of NAD+ metabolism and glycolysis in chemotherapy response needs more in-depth investigation.