β-Carotene as a high-potency antioxidant to prevent the formation of phospholipid hydroperoxides in red blood cells of mice

Kiyotaka Nakagawa, Kenshiro Fujimoto, Teruo Miyazawa

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

In order to investigate the antioxidant effect of β-carotene in vivo, phospholipid hydroperoxides and β-carotene isomers in red blood cells (RBC), plasma and tissue organelles were quantitatively measured after the oral administration of β-carotene (94.8% all-trans-β-carotene) to mice. Three groups of 24 mice each were fed for 1 week on a semisynthetic diet supplemented with either 0.6% or 3.0% β-carotene/diet or maintained on a control (β-carotene-unsupplemented) diet. The RBC phospholipid hydroperoxides showed a significant decrease followed by an increase of β-carotene intakes; i.e., 201, 16 and 4 pmol of phosphatidylcholine hydroperoxide/ml packed RBC, and 108, 22 and 8 pmol of phosphatidylethanolamine hydroperoxide/ml packed RBC, in the mice given the control diet, 0.6% carotene diet and 3.0% carotene diet, respectively. The RBC β-carotene increased from 14 to 43 pmol/ml packed RBC as followed by the increase of β-carotene intakes. Such a potent antioxidant effect of β-carotene as observed in RBC was not confirmed in the plasma, liver or lungs, although their β-carotene contents increased. The β-carotene ingestion increased the all-trans-β-carotene and retinol contents in RBC, plasma, liver and lungs, but the α-tocopherol content decreased. In the β-carotene-supplemented (6 g and 30 g/kg diet) mice, cis-β-carotene content was relatively higher in the RBC (25-35% of total β-carotene) than that in the plasma, liver and lungs. The present findings indicate that not only does β-carotene act as a potent antioxidant in vivo but also its antioxidant effect is very specific in the RBC phospholipid bilayers rather than in the plasma and other tissue organelles.

Original languageEnglish
Pages (from-to)110-116
Number of pages7
JournalBiochimica et Biophysica Acta - Lipids and Lipid Metabolism
Volume1299
Issue number1
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • (Mouse)
  • Antioxidant
  • Erythrocyte
  • Lipid peroxide
  • Phospholipid
  • β-Carotene

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Endocrinology

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