Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila.
Reduced insulin/IGF signaling increases lifespan in many animals. To understand how insulin/IGF mediates lifespan in Drosophila, we performed chromatin immunoprecipitation-sequencing analysis with the insulin/IGF regulated transcription factor dFOXO in long-lived insulin/IGF signaling genotypes. Daw...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2013-11-01
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| Series: | PLoS Genetics |
| Online Access: | http://europepmc.org/articles/PMC3820802?pdf=render |
| _version_ | 1819088424782528512 |
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| author | Hua Bai Ping Kang Ana Maria Hernandez Marc Tatar |
| author_facet | Hua Bai Ping Kang Ana Maria Hernandez Marc Tatar |
| author_sort | Hua Bai |
| collection | DOAJ |
| description | Reduced insulin/IGF signaling increases lifespan in many animals. To understand how insulin/IGF mediates lifespan in Drosophila, we performed chromatin immunoprecipitation-sequencing analysis with the insulin/IGF regulated transcription factor dFOXO in long-lived insulin/IGF signaling genotypes. Dawdle, an Activin ligand, is bound and repressed by dFOXO when reduced insulin/IGF extends lifespan. Reduced Activin signaling improves performance and protein homeostasis in muscles of aged flies. Activin signaling through the Smad binding element inhibits the transcription of Autophagy-specific gene 8a (Atg8a) within muscle, a factor controlling the rate of autophagy. Expression of Atg8a within muscle is sufficient to increase lifespan. These data reveal how insulin signaling can regulate aging through control of Activin signaling that in turn controls autophagy, representing a potentially conserved molecular basis for longevity assurance. While reduced Activin within muscle autonomously retards functional aging of this tissue, these effects in muscle also reduce secretion of insulin-like peptides at a distance from the brain. Reduced insulin secretion from the brain may subsequently reinforce longevity assurance through decreased systemic insulin/IGF signaling. |
| first_indexed | 2024-12-21T21:51:49Z |
| format | Article |
| id | doaj.art-1b0365667dfe44e3a5f37a053bb56599 |
| institution | Directory Open Access Journal |
| issn | 1553-7390 1553-7404 |
| language | English |
| last_indexed | 2024-12-21T21:51:49Z |
| publishDate | 2013-11-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Genetics |
| spelling | doaj.art-1b0365667dfe44e3a5f37a053bb565992022-12-21T18:49:04ZengPublic Library of Science (PLoS)PLoS Genetics1553-73901553-74042013-11-01911e100394110.1371/journal.pgen.1003941Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila.Hua BaiPing KangAna Maria HernandezMarc TatarReduced insulin/IGF signaling increases lifespan in many animals. To understand how insulin/IGF mediates lifespan in Drosophila, we performed chromatin immunoprecipitation-sequencing analysis with the insulin/IGF regulated transcription factor dFOXO in long-lived insulin/IGF signaling genotypes. Dawdle, an Activin ligand, is bound and repressed by dFOXO when reduced insulin/IGF extends lifespan. Reduced Activin signaling improves performance and protein homeostasis in muscles of aged flies. Activin signaling through the Smad binding element inhibits the transcription of Autophagy-specific gene 8a (Atg8a) within muscle, a factor controlling the rate of autophagy. Expression of Atg8a within muscle is sufficient to increase lifespan. These data reveal how insulin signaling can regulate aging through control of Activin signaling that in turn controls autophagy, representing a potentially conserved molecular basis for longevity assurance. While reduced Activin within muscle autonomously retards functional aging of this tissue, these effects in muscle also reduce secretion of insulin-like peptides at a distance from the brain. Reduced insulin secretion from the brain may subsequently reinforce longevity assurance through decreased systemic insulin/IGF signaling.http://europepmc.org/articles/PMC3820802?pdf=render |
| spellingShingle | Hua Bai Ping Kang Ana Maria Hernandez Marc Tatar Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila. PLoS Genetics |
| title | Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila. |
| title_full | Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila. |
| title_fullStr | Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila. |
| title_full_unstemmed | Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila. |
| title_short | Activin signaling targeted by insulin/dFOXO regulates aging and muscle proteostasis in Drosophila. |
| title_sort | activin signaling targeted by insulin dfoxo regulates aging and muscle proteostasis in drosophila |
| url | http://europepmc.org/articles/PMC3820802?pdf=render |
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