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Remesar X, Antelo A, Llivina C, Albà E, Berdié L, Agnelli S, Arriarán S, Fernández-López JA, Alemany M. Influence of a hyperlipidic diet on the composition of the non-membrane lipid pool of red blood cells of male and female rats. PeerJ 2015. [PMID: 26213652 PMCID: PMC4512764 DOI: 10.7717/peerj.1083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background and objectives. Red blood cells (RBC) are continuously exposed to oxidative agents, affecting their membrane lipid function. However, the amount of lipid in RBCs is higher than the lipids of the cell membrane, and includes triacylglycerols, which are no membrane components. We assumed that the extra lipids originated from lipoproteins attached to the cell surface, and we intended to analyse whether the size and composition of this lipid pool were affected by sex or diet. Experimental design. Adult male and female Wistar rats were fed control or cafeteria diets. Packed blood cells and plasma lipids were extracted and analysed for fatty acids by methylation and GC-MS, taking care of not extracting membrane lipids. Results. The absence of ω3-PUFA in RBC extracts (but not in plasma) suggest that the lipids extracted were essentially those in the postulated lipid surface pool and not those in cell membrane. In cells' extracts, there was a marked depletion of PUFA (and, in general, of insaturation). Fatty acid patterns were similar for all groups studied, with limited effects of sex and no effects of diet in RBC (but not in plasma) fatty acids. Presence of trans fatty acids was small but higher in RBC lipids, and could not be justified by dietary sources. Conclusions. The presence of a small layer of lipid on the RBC surface may limit oxidative damage to the cell outer structures, and help explain its role in the transport of lipophilic compounds. However, there may be other, so far uncovered, additional functions for this lipid pool.
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Affiliation(s)
- Xavier Remesar
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain ; Institute of Biomedicine, University of Barcelona , Barcelona , Spain ; CIBER OBN , Barcelona , Spain
| | - Arantxa Antelo
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain ; CIBER OBN , Barcelona , Spain
| | - Clàudia Llivina
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain
| | - Emma Albà
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain
| | - Lourdes Berdié
- Scientific & Technical Services, University of Barcelona , Barcelona , Spain
| | - Silvia Agnelli
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain
| | - Sofía Arriarán
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain
| | - José Antonio Fernández-López
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain ; Institute of Biomedicine, University of Barcelona , Barcelona , Spain ; CIBER OBN , Barcelona , Spain
| | - Marià Alemany
- Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona , Barcelona , Spain ; Institute of Biomedicine, University of Barcelona , Barcelona , Spain ; CIBER OBN , Barcelona , Spain
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