Cited by 28Antioxidant Activity and Oxidative StressPhytochemicals and Antioxidant ActivitiesFree Radicals and Antioxidants

Structure-activity relationship of antioxidants for inhibitors of linoleic acid hydroperoxide-induced toxicity in cultured human umbilical vein endothelial cells

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Kaneko, Takao, Baba, Naomichi, Matsuo, Mitsuyoshi·2001·Cytotechnology

Abstract

Structure-activity relationship of antioxidants for the protective effects on linoleic acid hydroperoxide (LOOH)-induced toxicity were examined in cultured human umbilical vein endothelial cells. alpha-Tocopherol, 2,2,5,7,8-pentamethylchroman-6-ol, butylated hydroxytoluene, probucol, and fatty acid esters of ascorbic acid provided efficient protection against the cytotoxicity of LOOH in pretreatment, but phenols without alkyl groups at the ortho positions and hydrophilic antioxidants such as Trolox and ascorbic acid provided no protection. Probably, the effectiveness of the protection against cytotoxicity by these antioxidants dependsprimarily on their rate of incorporation into cells due to their lipophilicity, secondly on their antioxidant activity, and thirdly on their orientation in biomembranes. On the other hand, flavones, such as baicalein and luteolin bearing 3 to 5 hydroxyl groups, and flavonols showed a protective effect against LOOH cytotoxicity when added together with LOOH,but not by pretreatment. Among catechins, (+)-catechin and (-)-epigallocatechin gallate monoglucoside and diglucoside were effective in suppressing LOOH-induced cytotoxicity, but their effects were not so strong. The structure-activity relationship of flavonoids revealed the presence of either theortho-dihydroxy structure in the B ring of flavonoids or the 3-hydroxyl and 4-oxo groups in the C ring to be important forthe protective activities. Furthermore, coumarins such as esculetin containing the ortho catechol structure had protective effects in both pretreatment and concurrent treatment. These results suggest that ortho catechol moiety of flavonoids, catechins, and coumarins is an important structure in the protection against LOOH-induced cytotoxicity,and that the alkyl groups of monophenols are critical for protection.

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  • Esculetin has been reported to protect HUVEC against cytotoxicity after exposure of linoleic acid hydroperoxide, likely via its radical scavenging ability.

    “Esculetin has been reported to protect HUVEC against cytotoxicity after exposure of linoleic acid hydroperoxide, which is likely via its radical scavenging ability [166].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [166]

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Authors
Kaneko, T., Baba, N., & Matsuo, M.
Affiliations
  • Tokyo Metropolitan Institute of Gerontology (JP)
  • Okayama University (JP)
  • Konan University (JP)
Corresponding author
Kaneko, Takao
Venue
Cytotechnology
Published
2001-01
Volume
35
Issue
1
Pages
43-55
ISSN
  • 0920-9069 (ISSN-L)
  • 1573-0778
OpenAlex
W1607828670
Cited by
28
References
61
Citations by year
2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2016: 2 · 2015: 3 · 2014: 1
FWCI
0.90
Type
journal article
Language
en
Open access
Locations
  • Cytotechnology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
  • Physical Sciences › Chemistry › Organic Chemistry › Free Radicals and Antioxidants
Keywords
structure-activity relationship, antioxidants, linoleic acid hydroperoxide, lipid peroxidation, endothelial cell cytotoxicity, human umbilical vein endothelial cells, alpha-tocopherol, butylated hydroxytoluene, probucol, ascorbic acid esters, flavonoids, catechins, coumarins, lipophilicity, membrane incorporation, epigallocatechin gallate

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