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Anti-inflammatory effects of conjugated linoleic acid isomers and essential fatty acids in bovine mammary epithelial cells

Published online by Cambridge University Press:  09 January 2018

D. Dipasquale ,
L. Basiricò ,
P. Morera ,
R. Primi ,
A. Tröscher  and
U. Bernabucci
D. Dipasquale
Affiliation:
Dipartimento di Scienze Agrarie e Forestali, Università degli Studi della Tuscia, via San Camillo De Lellis s.n.c., 01100 Viterbo, Italy
L. Basiricò
Affiliation:
Dipartimento di Scienze Agrarie e Forestali, Università degli Studi della Tuscia, via San Camillo De Lellis s.n.c., 01100 Viterbo, Italy
P. Morera
Affiliation:
Dipartimento di Scienze Agrarie e Forestali, Università degli Studi della Tuscia, via San Camillo De Lellis s.n.c., 01100 Viterbo, Italy
R. Primi
Affiliation:
Dipartimento di Scienze Agrarie e Forestali, Università degli Studi della Tuscia, via San Camillo De Lellis s.n.c., 01100 Viterbo, Italy
A. Tröscher
Affiliation:
Animal Nutrition, BASF SE, Chemiestrasse. 22, F 31, 68623 Lampertheim, Germany
U. Bernabucci*
Affiliation:
Dipartimento di Scienze Agrarie e Forestali, Università degli Studi della Tuscia, via San Camillo De Lellis s.n.c., 01100 Viterbo, Italy
*
†E-mail: bernab@unitus.it
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Abstract

Fatty acids are important modulators of inflammatory responses, in particular, n-3 and n-6 essential fatty acids and CLA have received particular attention for their ability to modulate inflammation. The objectives of this study were to compare the effects of CLA and essential fatty acids on the expression of pro and anti- inflammatory cytokines and their protective efficacy against inflammatory status in mammary gland by an in vitro model based on bovine mammary epithelial cells (BME-UV1). Bovine mammary epithelial cells were treated with complete medium containing either 50 µM of cis-9, trans-11 CLA (c9,t11 CLA) or trans-10, cis-12 CLA (t10,c12 CLA) or (α)-linolenic acid (aLnA) or (γ)-linolenic acid (gLnA) or linoleic acid (LA). After 48 h by fatty acids administration the cells were treated for 3 h with 20 µM of lipopolysaccharide (LPS) to induce inflammatory stimulus. Reactive oxygen species (ROS) production after treatments was assessed to verify and to compare the potential protection of different fatty acids against LPS-induced oxidative stress. The messenger RNA abundance of bovine pro and anti-inflammatory cytokines (tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6) and interleukine-10 (IL-10)) and peroxisome proliferator receptor-α/γ (PPARγ/α) were determined in BME-UV1 by real-time PCR. The results showed that cells treated with fatty acids and LPS increased ROS production compared with control cells. Among treatments, cells treated with c9,t11 CLA and t10,c12 CLA isomers revealed significant lower levels of ROS production compared with other fatty acids. All fatty acids reduced the gene expression of pro- and anti-inflammatory cytokines. Among fatty acids, t10,c12 CLA, LA and gLnA showed an homogeneous reduction of the three pro-inflammatory cytokines and this may correspond to more balanced and efficient physiological activity and may trigger a better protective effect. The PPARγ gene expression was significantly greater in cells treated with t10,c12 CLA, aLnA and LA, whereas the PPARα gene expression levels were significantly lower in cells treated with all different fatty acids, compared with the control. These results suggest that fatty acids inhibited the transcription of pro-inflammatory cytokines by the upregulation of PPARγ expression.

Keywords

CLA cis-9trans-11CLA trans-10cis-12essential fatty acidsbovine mammary gland cellsinflammatory status
Type
Research Article
Information
animal , Volume 12 , Issue 10 , October 2018 , pp. 2108 - 2114
Copyright
© The Animal Consortium 2018 

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