XBP-1 Remodels Lipid Metabolism to Extend Longevity
Summary: The endoplasmic reticulum unfolded protein response (UPRER) is a cellular stress response that maintains homeostasis within the secretory pathway, regulates glucose and lipid metabolism, and influences longevity. To ask whether this role in lifespan determination depends upon metabolic inte...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-07-01
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| Series: | Cell Reports |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211124719308307 |
| _version_ | 1811290952378089472 |
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| author | Soudabeh Imanikia Ming Sheng Cecilia Castro Julian L. Griffin Rebecca C. Taylor |
| author_facet | Soudabeh Imanikia Ming Sheng Cecilia Castro Julian L. Griffin Rebecca C. Taylor |
| author_sort | Soudabeh Imanikia |
| collection | DOAJ |
| description | Summary: The endoplasmic reticulum unfolded protein response (UPRER) is a cellular stress response that maintains homeostasis within the secretory pathway, regulates glucose and lipid metabolism, and influences longevity. To ask whether this role in lifespan determination depends upon metabolic intermediaries, we metabotyped C. elegans expressing the active form of the UPRER transcription factor XBP-1, XBP-1s, and found many metabolic changes. These included reduced levels of triglycerides and increased levels of oleic acid (OA), a monounsaturated fatty acid associated with lifespan extension in C. elegans. Here, we show that constitutive XBP-1s expression increases the activity of lysosomal lipases and upregulates transcription of the Δ9 desaturase FAT-6, which is required for the full lifespan extension induced by XBP-1s. Dietary OA supplementation increases the lifespan of wild-type, but not xbp-1s-expressing animals and enhances proteostasis. These results suggest that modulation of lipid metabolism by XBP-1s contributes to its downstream effects on protein homeostasis and longevity. : Imanikia et al. find that expressing the transcription factor xbp-1s in C. elegans remodels lipid metabolism, decreasing triglyceride and increasing oleic acid (OA) levels. Increased OA levels may involve the activity of lysosomal lipases and a Δ9 desaturase, and are sufficient to increase lifespan and protect animals from proteotoxicity. Keywords: C. elegans, aging, proteostasis, lipids, monounsaturated, metabolism, neurons, signaling |
| first_indexed | 2024-04-13T04:21:14Z |
| format | Article |
| id | doaj.art-599bfdfe04eb40bebbfe37ba4988bf10 |
| institution | Directory Open Access Journal |
| issn | 2211-1247 |
| language | English |
| last_indexed | 2024-04-13T04:21:14Z |
| publishDate | 2019-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cell Reports |
| spelling | doaj.art-599bfdfe04eb40bebbfe37ba4988bf102022-12-22T03:02:44ZengElsevierCell Reports2211-12472019-07-01283581589.e4XBP-1 Remodels Lipid Metabolism to Extend LongevitySoudabeh Imanikia0Ming Sheng1Cecilia Castro2Julian L. Griffin3Rebecca C. Taylor4MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, UKMRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, UKDepartment of Biochemistry and the Cambridge Systems Biology Centre, University of Cambridge, 80 Tennis Court Road, Cambridge, UKDepartment of Biochemistry and the Cambridge Systems Biology Centre, University of Cambridge, 80 Tennis Court Road, Cambridge, UKMRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, UK; Corresponding authorSummary: The endoplasmic reticulum unfolded protein response (UPRER) is a cellular stress response that maintains homeostasis within the secretory pathway, regulates glucose and lipid metabolism, and influences longevity. To ask whether this role in lifespan determination depends upon metabolic intermediaries, we metabotyped C. elegans expressing the active form of the UPRER transcription factor XBP-1, XBP-1s, and found many metabolic changes. These included reduced levels of triglycerides and increased levels of oleic acid (OA), a monounsaturated fatty acid associated with lifespan extension in C. elegans. Here, we show that constitutive XBP-1s expression increases the activity of lysosomal lipases and upregulates transcription of the Δ9 desaturase FAT-6, which is required for the full lifespan extension induced by XBP-1s. Dietary OA supplementation increases the lifespan of wild-type, but not xbp-1s-expressing animals and enhances proteostasis. These results suggest that modulation of lipid metabolism by XBP-1s contributes to its downstream effects on protein homeostasis and longevity. : Imanikia et al. find that expressing the transcription factor xbp-1s in C. elegans remodels lipid metabolism, decreasing triglyceride and increasing oleic acid (OA) levels. Increased OA levels may involve the activity of lysosomal lipases and a Δ9 desaturase, and are sufficient to increase lifespan and protect animals from proteotoxicity. Keywords: C. elegans, aging, proteostasis, lipids, monounsaturated, metabolism, neurons, signalinghttp://www.sciencedirect.com/science/article/pii/S2211124719308307 |
| spellingShingle | Soudabeh Imanikia Ming Sheng Cecilia Castro Julian L. Griffin Rebecca C. Taylor XBP-1 Remodels Lipid Metabolism to Extend Longevity Cell Reports |
| title | XBP-1 Remodels Lipid Metabolism to Extend Longevity |
| title_full | XBP-1 Remodels Lipid Metabolism to Extend Longevity |
| title_fullStr | XBP-1 Remodels Lipid Metabolism to Extend Longevity |
| title_full_unstemmed | XBP-1 Remodels Lipid Metabolism to Extend Longevity |
| title_short | XBP-1 Remodels Lipid Metabolism to Extend Longevity |
| title_sort | xbp 1 remodels lipid metabolism to extend longevity |
| url | http://www.sciencedirect.com/science/article/pii/S2211124719308307 |
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