Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados
Polyphenols have been reported to offer protection against the development of chronic diseases such as cardiovascular diseases or diabetes. The purpose of this study was to investigate the possible effect of different extracts rich in polyphenols on diet-induced adiposity and to elucidate the mechan...
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| Format: | info:eu-repo/semantics/doctoralThesis |
| Language: | spa |
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Servicio de Publicaciones de la Universidad de Navarra
2014
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| Online Access: | https://hdl.handle.net/10171/36190 |
| _version_ | 1793400432146513920 |
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| author | Boque, N. (Noemi) Campión-Zabalza, J. (Javier) Martinez, J.A. (José Alfredo) |
| author_facet | Boque, N. (Noemi) Campión-Zabalza, J. (Javier) Martinez, J.A. (José Alfredo) |
| author_sort | Boque, N. (Noemi) |
| collection | DSpace |
| description | Polyphenols have been reported to offer protection against the development of chronic diseases such as cardiovascular diseases or diabetes. The purpose of this study was to investigate the possible effect of different extracts rich in polyphenols on diet-induced adiposity and to elucidate the mechanisms involved in this effect through nutrigenomic and epigenetic studies in rats. We first characterized different rat obesity models induced by a high-fat diet, high-fat-sucrose (HFS) diet and a high-sucrose diet. The results revealed that HFS intake led to the establishment of a good obesity model to evaluate the biological activity of plant extracts. Then, a screening of different polyphenolic extracts for anti-obesity properties was conducted in rats fed a HFS diet. Extracts rich in polyphenols from apple, cinnamon, hamamelis and birch prevented body weight gain promoted by HFS intake, while apple and cinnamon extracts reduced adiposity gain. Since apple polyphenolic (AP) extract displayed the most outstanding properties, we seeked to study the mechanisms involved in its anti-obesity action. AP supplementation prevented HFS diet-induced hyperglycemia, hyperleptinemia, insulin resistance, glucose tolerance and adipocyte hypertrophy. These findings were accompanied by a prevention of the reduced lipolytic response induced by HFS diet and changes in the expression of adipocyte genes involved in adipogenesis, lipolysis, fatty acid oxidation and glycerol release. Furthermore, some of these genes could be subjected to epigenetic regulation, since changes in DNA methylation patterns were observed in AP-supplemented rats. In summary, we have shown that AP could be a useful functional food ingredient for the prevention of diet-induced obesity and its related complications. |
| format | info:eu-repo/semantics/doctoralThesis |
| id | oai:dadun.unav.edu:10171-36190 |
| institution | Universidad de Navarra |
| language | spa |
| publishDate | 2014 |
| publisher | Servicio de Publicaciones de la Universidad de Navarra |
| record_format | dspace |
| spelling | oai:dadun.unav.edu:10171-361902020-03-03T11:28:51Z Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados Boque, N. (Noemi) Campión-Zabalza, J. (Javier) Martinez, J.A. (José Alfredo) Gene expression Adipocyte Apple Materias Investigacion::Farmacia Polyphenols have been reported to offer protection against the development of chronic diseases such as cardiovascular diseases or diabetes. The purpose of this study was to investigate the possible effect of different extracts rich in polyphenols on diet-induced adiposity and to elucidate the mechanisms involved in this effect through nutrigenomic and epigenetic studies in rats. We first characterized different rat obesity models induced by a high-fat diet, high-fat-sucrose (HFS) diet and a high-sucrose diet. The results revealed that HFS intake led to the establishment of a good obesity model to evaluate the biological activity of plant extracts. Then, a screening of different polyphenolic extracts for anti-obesity properties was conducted in rats fed a HFS diet. Extracts rich in polyphenols from apple, cinnamon, hamamelis and birch prevented body weight gain promoted by HFS intake, while apple and cinnamon extracts reduced adiposity gain. Since apple polyphenolic (AP) extract displayed the most outstanding properties, we seeked to study the mechanisms involved in its anti-obesity action. AP supplementation prevented HFS diet-induced hyperglycemia, hyperleptinemia, insulin resistance, glucose tolerance and adipocyte hypertrophy. These findings were accompanied by a prevention of the reduced lipolytic response induced by HFS diet and changes in the expression of adipocyte genes involved in adipogenesis, lipolysis, fatty acid oxidation and glycerol release. Furthermore, some of these genes could be subjected to epigenetic regulation, since changes in DNA methylation patterns were observed in AP-supplemented rats. In summary, we have shown that AP could be a useful functional food ingredient for the prevention of diet-induced obesity and its related complications. 2014-07-25T11:38:17Z 2014-07-25T11:38:17Z 2014 2012-04-27 info:eu-repo/semantics/doctoralThesis https://hdl.handle.net/10171/36190 spa info:eu-repo/semantics/openAccess application/pdf Servicio de Publicaciones de la Universidad de Navarra |
| spellingShingle | Gene expression Adipocyte Apple Materias Investigacion::Farmacia Boque, N. (Noemi) Campión-Zabalza, J. (Javier) Martinez, J.A. (José Alfredo) Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| title | Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| title_full | Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| title_fullStr | Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| title_full_unstemmed | Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| title_short | Investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| title_sort | investigación de extractos ricos en polifenoles con actividad protectora frente al desarrollo de la obesidad: mecanismos nutrigenómicos implicados |
| topic | Gene expression Adipocyte Apple Materias Investigacion::Farmacia |
| url | https://hdl.handle.net/10171/36190 |
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