Abstract
Diets containing high n-3 polyunsaturated fatty acids (PUFA) decrease inflammation and the incidence of chronic diseases including cardiovascular disease and nonalcoholic fatty liver disease while trans-fatty acids (TFA) intake increases the incidence of these conditions. Some health benefits of n-3 PUFA are mediated through the impact of their oxygenated metabolites, i.e. oxylipins. The TFA, trans-10, cis-12-conjugated linoleic acid (CLA; 18:2n-6) is associated with adipose tissue (AT) inflammation, oxidative stress, and wasting. We examined the impact of a 4-week feeding of 0, 0.5, and 1.5% docosahexaenoic acid (DHA; 22:6n-3) in the presence and absence of 0.5% CLA on AT oxylipin profiles in female C57BL/6N mice. Esterified oxylipins in AT derived from linoleic acid (LNA), alpha-linolenic acid (ALA), arachidonic acid (ARA), eicosapentaenoic acid (EPA), DHA, and putative from CLA were quantified. CLA containing diets reduced AT mass by ~62%. Compared with the control diet, the DHA diet elevated concentrations of EPA-and DHA-derived alcohols and epoxides and LNA-derived alcohols, reduced ARA-derived alcohols, ketones, epoxides, and 6-keto-prostaglandin (PG) F1α (P < 0.05), and had mixed effects on ALA-derived alcohols. Dietary CLA lowered EPA-, DHA-, and ALA-derived epoxides, ARA-derived ketones and epoxides, and ALA-derived alcohols. While dietary CLA induced variable effects in EPA-, DHA-, and LNA-derived alcohols and LNA-derived ketones, it elevated ARA-derived alcohols and PGF1α, PGF2α, and F2-isoprostanes. DHA counteracted CLA-induced effects in 67, 57, 43, and 29% of total DHA-, ARA-, EPA-, and ALA-derived oxylipins, respectively. Thus, CLA elevated proinflammatory oxylipins while DHA increased anti-inflammatory oxylipins and diminished concentration of CLA-induced pro-inflammatory oxylipins in AT.
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Abbreviations
- ALA:
-
Alpha-linolenic acid (18:3n-3)
- ARA:
-
Arachidonic acid (20:4n-6)
- AT:
-
Adipose tissue
- CLA:
-
trans-10, cis-12-conjugated linoleic acid (18:2n-6)
- CON:
-
Control diet
- COX:
-
Cyclooxygenase
- CYP:
-
Cytochrome P450
- DH:
-
Dehydrogenase
- DHA:
-
Docosahexaenoic acid (22:6n-3)
- DiHDoPE:
-
Dihydroxy-docosapentaenoic
- DiHETE:
-
Dihydroxy-eicosatetraenoic acid
- DiHETrE:
-
Dihydroxy-eicosatrienoic acid
- DiHODE:
-
Dihydroxy-octadecadienoic acid
- DiHOME:
-
Dihydroxy-octadecenoic acid
- EKODE:
-
Epoxy-keto-octadecenoic acid
- EPA:
-
Eicosapentaenoic acid (20:5n-3)
- EpDoPE:
-
Epoxy-docosapentaenoic acid
- EpETE:
-
Epoxy-eicosatetraenoic acid
- EpETrE:
-
Epoxy-eicosatrienoic acid
- EpODE:
-
Epoxy-octadecadienoic acid
- EpOME:
-
Epoxy-octadecenoic acid
- F2-IsoP:
-
F2-isoprostanes
- HDoHE:
-
Hydroxy-docosahexaenoic acid
- HEPE:
-
Hydroxy-eicosapentaenoic acid
- HETE:
-
Hydroxy-eicosatetraenoic acid
- HETrE:
-
Hydroxy-eicosatrienoic acid
- HODE:
-
Hydroxy-octadecadienoic acid
- HOTrE:
-
Hydroxy-octadecatrienoic acid
- IL-6:
-
Interleukin-6
- IR:
-
Insulin resistance
- KETE:
-
Keto-eicosatetraenoic acid
- KODE:
-
Keto-octadecadienoic acid
- LNA:
-
Linoleic acid (18:2n-6)
- LOX:
-
Lipoxygenase
- NAFLD:
-
Nonalcoholic fatty liver disease
- PG:
-
Prostaglandin
- PUFA:
-
Polyunsaturated fatty acid
- ROS:
-
Reactive oxygen species
- sEH:
-
Soluble epoxide hydrolase
- TFA:
-
Trans fatty acid
- TNFα:
-
Tumor necrosis factor alpha
- TriHOME:
-
Trihydroxy-octadecenoic acid
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Acknowledgements
The authors would like to thank Jan Peerson at the University of California Davis for statistical support. This research was supported by USDA/ARS Intramural Projects 5306-51530-017-00D, 5306-51530-019-00D and 2032-51530-022-00D.
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Adkins, Y., Belda, B.J., Pedersen, T.L. et al. Dietary Docosahexaenoic Acid and trans-10, cis-12-Conjugated Linoleic Acid Differentially Alter Oxylipin Profiles in Mouse Periuterine Adipose Tissue. Lipids 52, 399–413 (2017). https://doi.org/10.1007/s11745-017-4252-3
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DOI: https://doi.org/10.1007/s11745-017-4252-3