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| Status |
Public on Aug 03, 2018 |
| Title |
Lithocholic acid significantly extends the lifespan in Drosophila melanogaster by targeting multiple lifespan-extending pathways |
| Organism |
Drosophila melanogaster |
| Experiment type |
Expression profiling by array
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| Summary |
Primary bile acids are produced in the liver whereas secondary bile acids such as lithocholic acid (LCA) are generated by gut bacteria from primary bile acids that escape the ileal absorption. Besides their well-known function as detergents in lipid digestion, bile acids are important signaling molecules mediating effects on the host’s metabolism. As energy metabolism is closely linked to aging and longevity we supplemented fruit flies (Drosophila melanogaster) with 50 µmol/l LCA either for 30 days or throughout their lifetime. LCA supplementation resulted in a significant induction of the mean (+12 days), median (+10 days) and maximum lifespan (+ 11 days) in comparison to untreated control flies. This lifespan extension was accompanied by an induction of spargel (srl), the fly homolog of mammalian PPARG co-activator 1a(PGC1A. In srl mutant flies, LCA failed to induce longevity emphasizing the essential role of srl in the observed lifespan extension. In addition, the administration of antibiotics to wild type flies abrogated LCA-mediated effects on both lifespan and srl expression, suggesting a substantial contribution of the intestinal microbiota to the LCA-induced longevity.
In the present study, we show that the secondary bile acid LCA significantly induced the mean, the median and the maximum survival in Drosophila melanogaster. Our data suggest that besides an up-regulation of the PGC1a-homolog srl unidentified alterations in the structure or metabolism of gut microbiota contribute to the longevity effect of LCA.
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| Overall design |
Flies were grown for 30 days with either control or lithocholic acid (LCA) supplemented (50 µmol/l) diet and RNA extracted from pools 10 flies per sample.
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| Contributor(s) |
Wagner A, Sina C, Künstner A, Busch H |
| Citation(s) |
30051966 |
| Submission date |
Feb 08, 2018 |
| Last update date |
Nov 02, 2018 |
| Contact name |
Hauke Busch |
| E-mail(s) |
hauke.busch@uni-luebeck.de
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| Phone |
+49-451-3101-8470
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| Organization name |
University of Lübeck
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| Department |
Lübeck Institute of Experimental Dermatology
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| Street address |
Ratzeburger Allee 160
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| City |
Lübeck |
| State/province |
Schleswig-Holstein |
| ZIP/Postal code |
23538 |
| Country |
Germany |
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| Platforms (1) |
| GPL1322 |
[Drosophila_2] Affymetrix Drosophila Genome 2.0 Array |
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| Samples (6)
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| Relations |
| BioProject |
PRJNA433535 |
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