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Babchia N, DeAraujo A, Leclère L, Buteau B, Martine L, Grégoire S, Brétillon L. Docosahexaenoic acid modulates oxidative stress-induced apoptosis via PI3K/Akt m-TOR/p70S6K pathways in human RPE cells. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201400155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Narjes Babchia
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
| | - Aline DeAraujo
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
| | - Laurent Leclère
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
| | - Bénédicte Buteau
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
| | - Lucy Martine
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
| | - Stéphane Grégoire
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
| | - Lionel Brétillon
- CNRS; UMR 6265; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- INRA; UMR 1324; Centre des Sciences du Goût et de l'Alimentation; Dijon France
- Université de Bourgogne; Centre des Sciences du Goût et de l'Alimentation; Dijon France
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Saab S, Buteau B, Leclère L, Bron AM, Creuzot-Garcher CP, Bretillon L, Acar N. Involvement of plasmalogens in post-natal retinal vascular development. PLoS One 2014; 9:e101076. [PMID: 24963632 PMCID: PMC4071069 DOI: 10.1371/journal.pone.0101076] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 06/03/2014] [Indexed: 01/05/2023] Open
Abstract
Objective Proper development of retinal blood vessels is essential to ensure sufficient oxygen and nutrient supplies to the retina. It was shown that polyunsaturated fatty acids (PUFAs) could modulate factors involved in tissue vascularization. A congenital deficiency in ether-phospholipids, also termed “plasmalogens”, was shown to lead to abnormal ocular vascularization. Because plasmalogens are considered to be reservoirs of PUFAs, we wished to improve our understanding of the mechanisms by which plasmalogens regulate retinal vascular development and whether the release of PUFAs by calcium-independent phospholipase A2 (iPLA2) could be involved. Methods and Results By characterizing the cellular and molecular steps of retinal vascular development in a mouse model of plasmalogen deficiency, we demonstrated that plasmalogens modulate angiogenic processes during the early phases of retinal vascularization. They influence glial activity and primary astrocyte template formation, endothelial cell proliferation and retinal vessel outgrowth, and impact the expression of the genes involved in angiogenesis in the retina. These early defects led to a disorganized and dysfunctional retinal vascular network at adult age. By comparing these data to those obtained on a mouse model of retinal iPLA2 inhibition, we suggest that these processes may be mediated by PUFAs released from plasmalogens and further signalling through the angiopoietin/tie pathways. Conclusions These data suggest that plasmalogens play a crucial role in retinal vascularization processes.
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Affiliation(s)
- Sarah Saab
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
| | - Bénédicte Buteau
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
| | - Laurent Leclère
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
| | - Alain M. Bron
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Department of Ophthalmology, University Hospital, Dijon, France
| | - Catherine P. Creuzot-Garcher
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Department of Ophthalmology, University Hospital, Dijon, France
| | - Lionel Bretillon
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
| | - Niyazi Acar
- CNRS, UMR6265 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- Université de Bourgogne, UMR Centre des Sciences du Goût et de l’Alimentation, Dijon, France
- * E-mail:
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Thierry M, Pasquis B, Febvret V, Leclère L, Acar N, Gambert S, Bretillon L. O32 Le syndrome métabolique induit par un régime enrichi en fructose est promoteur d’un développement néovasculaire et d’altérations fonctionnelles dans la rétine. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70304-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Joffre C, Leclère L, Buteau B, Martine L, Cabaret S, Malvitte L, Acar N, Lizard G, Bron A, Creuzot-Garcher C, Bretillon L. Oxysterols Induced Inflammation and Oxidation in Primary Porcine Retinal Pigment Epithelial Cells. Curr Eye Res 2009; 32:271-80. [PMID: 17453947 DOI: 10.1080/02713680601187951] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE Aging is associated with an accumulation of cholesterol esters in the Bruch membrane. Cholesterol esters are prone to undergo oxidation and generate oxysterols that have cytotoxic and proinflammatory properties. We investigated the effects of three oxysterols on mitochondrial dysfunctions, inflammation, and oxidative stress in primary cultures of porcine retinal pigment epithelial (RPE) cells. METHODS RPE cells were incubated with oxysterols (50 micro M of 24-hydroxycholesterol, 25-hydroxycholesterol, or 7-ketocholesterol) for 24 hr and 48 hr. Oxysterol content was determined in cells and in corresponding media by gas chromatography. Mitochondrial activity was measured by mitochondrial dehydrogenase activity. The intracellular formation of reactive oxygen species in RPE cells was detected by using the fluorescent probe DCFH-DA. IL-8 was assayed in the supernatants by ELISA, and the corresponding cellular transcripts were semiquantified by RT-PCR. RESULTS Analyses of the oxysterols content in the RPE cells and corresponding media suggested a high rate of cellular uptake, although some differences were observed between 7-ketocholesterol on the one hand and 24-hydroxycholesterol and 25-hydroxycholesterol on the other hand. All oxysterols induced slight mitochondrial dysfunctions but a significant 2- to 4-fold increase in reactive oxygen species (ROS) production compared with the control. They also enhanced IL-8 gene expression and IL-8 protein secretion in the following decreasing order: 25-hydroxycholesterol > 24-hydroxycholesterol > 7-ketocholesterol. CONCLUSIONS We conclude that in confluent primary porcine RPE cells, 24-hydroxycholesterol, 25-hydroxycholesterol, and 7-ketocholesterol are potent inducers of oxidation and inflammation.
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Affiliation(s)
- Corinne Joffre
- Eye and Nutrition Research Group, INRA, UMR1129 FLAVIC, Dijon, France.
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