Our long-term goal is to understand the genetic and molecular elements that determine the process of aging and life span. The focus of this proposal is to identify molecular genetic effectors that mediate calorie/dietary restriction (CR/DR) life span extension as a prerequisite to developing molecular genetic and pharmacological interventions that can extend healthy life span. Examination of CR/DR in a variety of species shows changes in a large number of genes and physiological systems. A central question in translating this information to therapeutic interventions is which of the many changes seen are involved in extending healthy life span? In flies molecular genetic studies have led to a model in which a portion of the life span extending effect of CR/DR is mediated by alterations in the activity of the histone deacetylases Rpd3 and Sir2, and the transcription factor p53. This model provides a framework for use in identifying genetic, biochemical, and pharmacological effectors of CR/DR mediated longevity. In this proposal we will (i) further examine the mechanisms by which an increase in dSir2 extends life span in the fly, (ii) confirm the life span extending effect of a gene identified through our genomic analysis of the CR/Sir2/p53 pathway and begin to determine it's relationship to CR/DR life span extension, (iii) utilize genome based tools to determine genes and gene sets important for CR/DR life span extension in flies and (iv) test the effect of these newly identified genes on life span using molecular genetic tools.
Calorie/dietary restriction extends life span and delays the onset of age-related pathology in organisms from worms to mice. Understanding the molecular genetic interactions in the calorie/dietary restriction pathway of Drosophila will contribute to the development of interventions to prevent or delay age-dependent decline in humans.
|von Loeffelholz, Christian; Lieske, Stefanie; Neuschäfer-Rube, Frank et al. (2017) The human longevity gene homolog INDY and interleukin-6 interact in hepatic lipid metabolism. Hepatology 66:616-630|
|Willmes, Diana M; Helfand, Stephen L; Birkenfeld, Andreas L (2016) The longevity transporter mIndy (Slc13a5) as a target for treating hepatic steatosis and insulin resistance. Aging (Albany NY) 8:208-9|
|Wood, Jason G; Jones, Brian C; Jiang, Nan et al. (2016) Chromatin-modifying genetic interventions suppress age-associated transposable element activation and extend life span in Drosophila. Proc Natl Acad Sci U S A 113:11277-11282|
|Jones, Brian C; Wood, Jason G; Chang, Chengyi et al. (2016) A somatic piRNA pathway in the Drosophila fat body ensures metabolic homeostasis and normal lifespan. Nat Commun 7:13856|
|Pu, Mintie; Ni, Zhuoyu; Wang, Minghui et al. (2015) Trimethylation of Lys36 on H3 restricts gene expression change during aging and impacts life span. Genes Dev 29:718-31|
|Zhu, Chen-Tseh; Chang, Chengyi; Reenan, Robert A et al. (2014) Indy gene variation in natural populations confers fitness advantage and life span extension through transposon insertion. Aging (Albany NY) 6:58-69|
|Ding, Feifei; Gil, M Pilar; Franklin, Michael et al. (2014) Transcriptional response to dietary restriction in Drosophila melanogaster. J Insect Physiol 69:101-6|
|Gorbunova, Vera; Boeke, Jef D; Helfand, Stephen L et al. (2014) Human Genomics. Sleeping dogs of the genome. Science 346:1187-8|
|Whitaker, Rachel; Gil, M Pilar; Ding, Feifei et al. (2014) Dietary switch reveals fast coordinated gene expression changes in Drosophila melanogaster. Aging (Albany NY) 6:355-68|
|Whitaker, Rachel; Faulkner, Shakeela; Miyokawa, Reika et al. (2013) Increased expression of Drosophila Sir2 extends life span in a dose-dependent manner. Aging (Albany NY) 5:682-91|
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