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The effect of maternal obesity on fatty acid transporter expression and lipid metabolism in the full‐term placenta of lean breed swine
Author(s) -
Tian L.,
Dong S. S.,
Hu J.,
Yao J. J.,
Yan P. S.
Publication year - 2018
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/jpn.12735
Subject(s) - nefa , endocrinology , medicine , biology , litter , placenta , triglyceride , lipid metabolism , fatty acid synthase , breed , fatty acid , fatty acid binding protein , leptin , pregnancy , fetus , cholesterol , insulin , obesity , zoology , biochemistry , genetics , gene , agronomy
Summary This study was conducted to evaluate the influence of back‐fat thickness ( BF ), at mating of sows, on the maternal and newborn circulating lipids, expression of placental fatty acids ( FA ) transporters and lipid accumulation in placenta. Full‐term placentas were obtained by vaginal delivery from BFI (9–14 mm; n = 37), BFII (15–19 mm; n = 43) and BFIII (20–27 mm; n = 38) sows according to BF at mating, and frozen placental sections were analysed for fat accumulation. Blood samples were collected from the sows of day 105 pregnancy and from cord blood at delivery. mRNA and protein expression levels were evaluated with real‐time RT ‐ PCR and Western blotting. Our results demonstrated that BFII females had significantly increased litter weight and placental efficiency, decreased maternal triglyceride ( TG ) and non‐esterified fatty acids ( NEFA ) levels, decreased maternal IL ‐6, TNF α and leptin levels compared to BFIII females ( p < .05). BFIII sows were associated with significantly decreased newborn TG levels, increased newborn glucose, IL ‐6 and TNF α levels compared to BFI or BFII sows ( p < .05). BFI and BFII females had significantly decreased placental TG , NEFA and cholesterol ( CHOL ) contents compared to BFIII females ( p < .05). Moreover, decreased CD 36, FATP 1, FABP 4, and FABP 1 mRNA and protein and FATP 4 protein expression, and increased LPL activity were also observed in BFIII group compared with BFII group ( p < .05). PPAR γ mRNA and protein and lipogenic genes such as SREBP ‐1c , ACSL 1, ACC α, FAS and SCD mRNA expression were downregulated or upregulated, respectively, in the placentas of BFIII sows compared to BFI or BFII sows ( p < .05). Overall, this study demonstrated that there is no advantage, in terms of litter live size, litter weight and placental FA transport and metabolism, in performing the mating of sows with BF >19 mm.