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- W968722471 abstract "Ceramide 1 (Cer1), a Cer species with eicosasphingenine (d20:1) amide-linked to two different ω-hydroxy fatty acids (C30wh:0:C32wh:1), which are, in turn, ester-linked to linoleic acid (LNA; 18:2n-6), plays a critical role in maintaining the structural integrity of the epidermal barrier. Prompted by the recovery of a disrupted epidermal barrier with dietary borage oil [BO: 36.5% LNA and 23.5% γ-linolenic acid (GLA; 18:3n-6)], in essential fatty acid (EFA)-deficient guinea pigs, we further investigated the effects of BO on the substitution of ester-linked GLA for LNA in these two epidermal Cer1 species by LC-MS in positive and negative modes. Dietary supplementation of BO for 2 weeks in EFA-deficient guinea pigs increased LNA ester-linked to C32wh:1/d20:1 and C30wh:0/d20:1 of Cer1. Moreover, GLA ester-linked to C32wh:1/d20:1, but not to C30wh:0/d20:1, of Cer1 was detected, which was further confirmed by the product ions of m/z 277.2 for ester-linked GLA and m/z 802.3 for the deprotonated C32wh:1/d20:1. C20-Metabolized fatty acids of LNA or GLA were not ester-linked to these Cer1 species. Dietary BO induced GLA ester-linked to C32wh:1/d20:1 of epidermal Cer1." @default.
- W968722471 created "2016-06-24" @default.
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- W968722471 date "2015-08-02" @default.
- W968722471 modified "2023-10-14" @default.
- W968722471 title "Mass Spectrometric Confirmation of γ-Linolenic Acid Ester-Linked Ceramide 1 in the Epidermis of Borage Oil Fed Guinea Pigs" @default.
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- W968722471 doi "https://doi.org/10.1007/s11745-015-4056-2" @default.
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