In an initial preliminary screen we identified factors associated with controlling . Drosophila aging by examining longevity in adults where EP elements induced over-expression or antisense-RNA at genes adjacent to each insertion. Here, we study 45 EP lines that initially showed at least 10% longer mean lifespan than controls. These 45 lines and a . daughterless (da)-Gal4 stock were isogenized into a . CS10 wild-type background. Sixteen EP lines corresponding to 15 genes significantly extended lifespan when their target genes were driven by . da-Gal4. In each case, the target genes were seen to be over-expressed. Independently derived UAS-gene transgenic stocks were available or made for two candidates: . ImpL2 which is ecdysone-inducible gene L2, and . CG33138, 1,4-alpha-glucan branching enzyme. With both, adult lifespan was increased upon over-expression via the GeneSwitch inducible Gal4 driver system. Several genes in this set of 15 correspond to previously discovered longevity assurance systems such as insulin/IGF-1 signaling, gene silencing, and autophagy; others suggest new potential mechanisms for the control of aging including mRNA synthesis and maturation, intracellular vesicle trafficking, and neuroendocrine regulation.
Bibliographical noteFunding Information:
We thank Dr. Saitoe for CS10 flies, Dr. Monnier for da-GS-Gal4 flies, Szeged Stock Center for some EP lines, and Bloomington Stock Center for Hsp70-Gal4 and S106-GS-Gal4 flies. We also thank Dr. Silverman for his comments on this manuscript. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 20110028200 ). Work from the laboratory of M. Tatar was supported through the National Institute of Aging, NIH (USA) by R01AG024360 and R01AG031152 , and by the Glenn Medical Foundation and the Ellison Medical Foundation .
All Science Journal Classification (ASJC) codes
- Developmental Biology