Abstract
We found that several transposable elements were highly active in Drosophila brain during normal aging. In addition, we found that mutations in Drosophila Argonaute 2 (Ago2) resulted in exacerbated transposon expression in the brain, progressive and age-dependent memory impairment, and shortened lifespan. These findings suggest that transposon activation may contribute to age-dependent loss of neuronal function.
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Acknowledgements
We thank B. Czech and G. Hannon (Cold Spring Harbor Laboratory) for the Ago2414 and loki RNAi fly lines, F.-B. Gao (University of Massachusetts Medical School) for the Ago251B fly line, B. Dickson (Institute of Molecular Pathology) for the UAS∷Ago2 transgenic fly line, M. Welte (University of Rochester) for the Ago2454 fly line, T. Lee (Janelia Farm Research Campus) for the pTub-GAL80 in Casper4 plasmid, J. Boek (Johns Hopkins University School of Medicine) for the 7B3 hybridoma cell line, and C. Bautista at the Cold Spring Harbor Laboratory shared resources for ascites production. We thank T. Russel for technical assistance in construction of the gypsy reporter system. We also are grateful to S. Waddell, J. Beshel, M. Cressy, B. Czech, G. Hannon, K. Honegger, J. Huang, M. Kernan, R. Martienssen, H. Qin, C. Sandoval, Y. Shuai, G. Turner, T. Zador and Y. Zhong for helpful discussions or comments on the manuscript. This work was supported by US National Institutes of Health grant TR01(5R01NS067690-03) and DART NeuroScience LLC awarded to J.D. S.G. received additional support from the Shakespeare Fellowship and the Ernst Göhner Foundation.
Author information
Author notes
- Wanhe Li
- & Lisa Prazak
These authors contributed equally to this work.
Affiliations
Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA.
- Wanhe Li
- , Lisa Prazak
- , Nabanita Chatterjee
- & Josh Dubnau
Graduate Program in Molecular and Cellular Biology, Stony Brook University, Stony Brook, New York, USA.
- Wanhe Li
Institute of Neuroinformatics, University of Zurich, Zurich, Switzerland.
- Servan Grüninger
Watson School of Biological Sciences, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA.
- Servan Grüninger
- , Lisa Krug
- & Josh Dubnau
Magistère de Génétique Graduate Program at Université Paris Diderot, Sorbonne Paris Cité, France.
- Delphine Theodorou
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Contributions
W.L., L.P. and J.D. conceived and designed the project and analyzed the experiments. W.L. performed the behavior experiments and western blots. The QPCR and lifespan analyses were performed by L.P. with assistance from W.L., L.K. and D.T. L.P., N.C. and S.G. did the imaging. W.L., L.P. and J.D. wrote the manuscript with comments from the other authors.
Competing interests
This work was funded in part by DART NeuroScience LLC via a research grant to J.D.
Corresponding author
Correspondence to Josh Dubnau.
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