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Interaction of drugs with extranuclear genetic elements and its consequences.

L Ebringer1

  • 1Institute of Molecular and Subcellular Biology, Comenius University, Bratislava, Czechoslovakia.

Teratogenesis, Carcinogenesis, and Mutagenesis
|January 1, 1990
PubMed
Summary

Mitochondria and plastids, with bacterial origins, are sensitive to antibacterial drugs. These drugs disrupt organelle function and can be explored for anticancer therapies.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Toxicology

Background:

  • Mitochondria and plastids possess bacterial ancestry, evidenced by their distinct DNA and prokaryotic transcription-translation systems.
  • Organellar components differ significantly from nuclear and cytoplasmic counterparts in physical and functional attributes.
  • This bacterial nature renders organelles susceptible to antibacterial agents and xenobiotics.

Purpose of the Study:

  • To summarize the effects of drugs and environmental xenobiotics on mitochondria and plastids across diverse organisms.
  • To present model organisms for detecting xenobiotic impacts on organelles.
  • To explore the consequences of xenobiotic-organelle interactions.

Main Methods:

  • Review of existing literature on organelle response to chemical agents.

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  • Identification and discussion of model organisms for toxicological studies.
  • Analysis of clinical manifestations of organelle dysfunction.

    • Main Results:

    • Antibacterial compounds inhibiting protein synthesis disrupt mitochondrial and plastid biogenesis, reducing cellular ATP production or photosynthesis.
    • Organellar genomes are more mutable than nuclear genomes, making them sensitive to genotoxic agents.
    • Dysfunctions in mitochondrial respiratory chains lead to abnormalities, particularly affecting high-energy-demand tissues like the brain and heart.

    Conclusions:

    • Organellar sensitivity to antibacterial agents can be exploited, with some inhibitors showing potential in anticancer therapy by targeting tumor cell proliferation.
    • Understanding xenobiotic effects on mitochondria and plastids is crucial for assessing cellular and organismal health.
    • Model systems are valuable for predicting and studying the toxicological impact of environmental factors on these essential organelles.