Effect of the tocotrienol-rich fraction on the lifespan and oxidative biomarkers in Caenorhabditis elegans under oxidative stress

Goon Jo Aan, Mohd Shahril Aszrin Zainudin, Noralisa Abdul Karim, Wan Zurinah Wan Ngah

Research output: Contribution to journalArticle

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Abstract

OBJECTIVE: This study was performed to determine the effect of the tocotrienol-rich fraction on the lifespan and oxidative status of C. elegans under oxidative stress. METHOD: Lifespan was determined by counting the number of surviving nematodes daily under a dissecting microscope after treatment with hydrogen peroxide and the tocotrienol-rich fraction. The evaluated oxidative markers included lipofuscin, which was measured using a fluorescent microscope, and protein carbonyl and 8- hydroxy-29-deoxyguanosine, which were measured using commercially available kits. RESULTS: Hydrogen peroxide-induced oxidative stress significantly decreased the mean lifespan of C. elegans, which was restored to that of the control by the tocotrienol-rich fraction when administered before or both before and after the hydrogen peroxide. The accumulation of the age marker lipofuscin, which increased with hydrogen peroxide exposure, was decreased with upon treatment with the tocotrienol-rich fraction (p,0.05). The level of 8-hydroxy-29-deoxyguanosine significantly increased in the hydrogen peroxide-induced group relative to the control. Treatment with the tocotrienol-rich fraction before or after hydrogen peroxide induction also increased the level of 8-hydroxy-29-deoxyguanosine relative to the control. However, neither hydrogen peroxide nor the tocotrienol-rich fraction treatment affected the protein carbonyl content of the nematodes. CONCLUSION: The tocotrienol-rich fraction restored the lifespan of oxidative stress-induced C. elegans and reduced the accumulation of lipofuscin but did not affect protein damage. In addition, DNA oxidation was increased.

Original languageEnglish
Pages (from-to)599-604
Number of pages6
JournalClinics
Volume68
Issue number5
DOIs
Publication statusPublished - May 2013

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Tocotrienols
Caenorhabditis elegans
Hydrogen Peroxide
Oxidative Stress
Biomarkers
Lipofuscin
Deoxyguanosine
Proteins
DNA

Keywords

  • C. elegans
  • Lifespan
  • Oxidative Biomarkers
  • Tocotrienol

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Effect of the tocotrienol-rich fraction on the lifespan and oxidative biomarkers in Caenorhabditis elegans under oxidative stress. / Jo Aan, Goon; Aszrin Zainudin, Mohd Shahril; Karim, Noralisa Abdul; Wan Ngah, Wan Zurinah.

In: Clinics, Vol. 68, No. 5, 05.2013, p. 599-604.

Research output: Contribution to journalArticle

Jo Aan, Goon ; Aszrin Zainudin, Mohd Shahril ; Karim, Noralisa Abdul ; Wan Ngah, Wan Zurinah. / Effect of the tocotrienol-rich fraction on the lifespan and oxidative biomarkers in Caenorhabditis elegans under oxidative stress. In: Clinics. 2013 ; Vol. 68, No. 5. pp. 599-604.
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