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Evaluation of Oxidative Stress in Biological Samples Using the Thiobarbituric Acid Reactive Substances Assay
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Oxidative stress and lipotoxicity.

Amy K Hauck1, David A Bernlohr2

  • 1Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota-Twin Cities, Minneapolis, MN 55455.

Journal of Lipid Research
|March 25, 2016
PubMed
Summary

Reactive lipid aldehydes are key players in cell signaling during oxidative stress. These electrophiles modify proteins, impacting processes like autophagy and apoptosis, and link oxidative stress to metabolic disease.

Keywords:
cardiolipinlipids/peroxidationoxidized lipids

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • α,β polyunsaturated lipid aldehydes are potent electrophiles.
  • These aldehydes covalently modify lipids, proteins, and nucleic acids.
  • Protein carbonylation is a key outcome of oxidative stress.

Purpose of the Study:

  • To review the generation and metabolism of reactive lipid aldehydes.
  • To discuss the signaling roles of these aldehydes.
  • To highlight their involvement in physiological and pathological conditions.

Main Methods:

  • Literature review of existing research.
  • Discussion of biochemical pathways.
  • Synthesis of findings on lipid aldehyde signaling.

Main Results:

  • Protein carbonylation by lipid aldehydes is a redox-sensitive signaling mechanism.
  • Carbonylation impacts autophagy, cell proliferation, transcriptional control, and apoptosis.
  • Protein carbonylation connects oxidative stress to mitochondrial dysfunction, ER stress, and metabolic disease.

Conclusions:

  • Reactive lipid aldehydes are critical mediators of cellular signaling.
  • Their modification of proteins has broad physiological and pathological implications.
  • Understanding these pathways is crucial for metabolic disease research.