hydrophobic antioxidant (疏水性抗氧化劑)

hydrophobic antioxidant (疏水性抗氧化劑)

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在皮膚生理學與生物化學中，疏水性抗氧化劑（Hydrophobic Antioxidants，亦稱為脂溶性抗氧化劑） 扮演著保護細胞膜與角質層脂質屏障的核心角色。相對於您之前詢問的維生素 C 等親水性抗氧化劑，這些物質不溶於水，而是存在於油脂與細胞膜的磷脂雙層中。

以下是針對疏水性抗氧化劑的詳細說明與逐句翻譯：

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常見的疏水性抗氧化劑 (Common Hydrophobic Antioxidants)

• Alpha-tocopherol (Vitamin E) is the most abundant and well-studied hydrophobic antioxidant in the human skin.

  (α-生育酚（維生素 E）是人體皮膚中含量最豐富且研究最廣泛的疏水性抗氧化劑。)

• Ubiquinol (Coenzyme Q10) acts as a potent lipophilic antioxidant that regenerates vitamin E and protects mitochondria from oxidative damage.

  (泛醇（輔酶 Q10）是一種強效的親脂性抗氧化劑，能再生維生素 E 並保護粒線體免受氧化損傷。)

• Carotenoids, such as beta-carotene and lycopene, are dietary hydrophobic antioxidants that accumulate in the skin to provide photoprotection.

  (類胡蘿蔔素（如 β-胡蘿蔔素和茄紅素）是飲食中的疏水性抗氧化劑，會累積在皮膚中以提供光防護作用。)

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功能與特性 (Functions and Characteristics)

• These antioxidants reside within the lipid bilayers of cell membranes and the extracellular matrix of the stratum corneum.

  (這些抗氧化劑存在於細胞膜的脂質雙層以及角質層的細胞外基質中。)

• Their primary role is to inhibit lipid peroxidation, a process where free radicals attack the fatty acids in skin oils and membranes.

  (它們的主要作用是抑制脂質過氧化，這是一個自由基攻擊皮膚油脂與細胞膜中脂肪酸的過程。)

• Hydrophobic antioxidants often work synergistically with hydrophilic ones to form a comprehensive defense network.

  (疏水性抗氧化劑通常與親水性抗氧化劑協同運作，形成一個全面性的防禦網絡。)

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與您提及研究的關聯 (Relevance to Your Previous Study)

在您之前提到的研究中，雖然重點在於維生素 C 等親水性物質，但研究也測量了 alpha-tocopherol (α-生育酚)。

• The concentration of alpha-tocopherol in the murine stratum corneum was significantly lower than that of vitamin C or glutathione.

  (小鼠角質層中 α-生育酚的濃度顯著低於維生素 C 或穀胱甘肽。)

• Despite its lower concentration, it remains essential for maintaining the integrity of the skin's barrier function against environmental pollutants.

  (儘管其濃度較低，但對於維持皮膚屏障功能以對抗環境污染物而言，它仍然至關重要。)

這些疏水性抗氧化劑就像是皮膚的「油性盾牌」，專門防守那些容易被空氣污染或紫外線破壞的油脂成分。

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資訊來源：

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Placeholder 湯偉晉編寫的英文字典

Placeholder 湯偉晉編寫的英文字典

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