DHA Modulates Immune Response and Mitochondrial Function of Atlantic Salmon Adipocytes after LPS Treatment

Adipocytes play a central role in overall energy homeostasis and are important contributors to the immune system. Fatty acids (FAs) act as signaling molecules capable to modulate adipocyte metabolism and functions. To identify the effects of two commonly used FAs in Atlantic salmon diets, primary ad...

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Bibliographic Details
Published in:International Journal of Molecular Sciences
Main Authors: Bou, Marta, Torgersen, Jacob Seilø, Østbye, Tone-Kari Knutsdatter, Ruyter, Bente, Wang, Xinxia, Škugor, Stanko, Kristiansen, Inger Øien, Todorčević, Marijana
Format: Text
Language:English
Published: MDPI 2020
Subjects:
Article
Atlantic salmon
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7312884/
http://www.ncbi.nlm.nih.gov/pubmed/32521827
https://doi.org/10.3390/ijms21114101
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Summary:Adipocytes play a central role in overall energy homeostasis and are important contributors to the immune system. Fatty acids (FAs) act as signaling molecules capable to modulate adipocyte metabolism and functions. To identify the effects of two commonly used FAs in Atlantic salmon diets, primary adipocytes were cultured in the presence of oleic (OA) or docosahexaenoic (DHA) acid. DHA decreased adipocyte lipid droplet number and area compared to OA. The increase in lipid load in OA treated adipocytes was paralleled by an increase in iNOS activity and mitochondrial SOD2-GFP activity, which was probably directed to counteract increase in oxidative stress. Under lipopolysaccharide (LPS)-induced inflammation, DHA had a greater anti-inflammatory effect than OA, as evidenced by the higher SOD2 activity and the transcriptional regulation of antioxidant enzymes and pro- and anti-inflammatory markers. In addition, DHA maintained a healthy mitochondrial structure under induced inflammation while OA led to elongated mitochondria with a thin thread like structures in adipocytes exposed to LPS. Overall, DHA possess anti-inflammatory properties and protects Atlantic salmon against oxidative stress and limits lipid deposition. Furthermore, DHA plays a key role in protecting mitochondria shape and function.

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