This is the revised version of the first competing renewal of a Program Project (PP) focused on investigating the role that age-related changes in autophagy play in the functional alterations and inefficient response to immunological challenges and to stress of old organisms. Autophagy is a basic catabolic pathway essential for the maintenance of cellular homeostasis, regulation of the cellular energetic balance and an integral part of the response to stress. The components of the PP are four Projects involving 6 faculty members from 5 academic departments and three Cores that provide support to the research activities of the four projects. The projects share ideas, techniques and experimental models. Completion of aims requires participation of members from several of the projects. The PPG activities are reviewed periodically by a 6-member Scientific Advisory Committee. The long-term goal of the PP remains testing the overall hypothesis that impairment in autophagy mediates the functional deterioration and the inability to orchestrate an efficient response to stressors and to immunological challenges in old organisms. Building on the novel findings of the previous period, we propose now the following specific aims: 1) to characterize the involvement of different autophagic pathways, including endosomal-microautophagy (eMI), in the cellular response to stress with the focus now on proteotoxicity, lipotoxicity and genotoxicity in liver, brain (P1), adipose tissue (P4) and immune system (P2, P3);2) to determine the impact of age-related changes in the different autophagic pathways on the immune response (P2, P3), adipose tissue homeostasis and remodeling (P4) and in the organismal resistance to stress (P1);3) to analyze the effect of different interventions that modulate the activity of different autophagic pathways on the metabolic changes associated with aging (P1, P4) and on the failure of two essential immune functions, antigen processing and presentation (P2) and T cell activation (P3). These studies will require the synergistic cooperation of groups with expertise in autophagy, dendritic cell function, T cell biology, lipid metabolism, medicinal chemistry and oxidative cellular injury. Relevance: This PP explores the novel concepts that: 1. defective autophagic function is behind the higher vulnerability to stressors of old organisms and that 2. interventions aimed at restoring or enhancing autophagy could be implemented as anti-aging strategies to prolong health-span. Our studies may ultimately lead to fundamental insights in understanding, treating or preventing the metabolic alterations and declined cognitive and immune function of elders through manipulations of the autophagic system.
This Program Project benefits from the expertise in biology of aging, immunology, metabolism, cell biology and medical chemistry contributed by the different members of the program to explore the contribution of defects in autophagy to the higher vulnerability to stressors of old organisms. We intend to perform interventions to restore or enhance autophagy in mouse models that we propose could be implemented as anti-aging strategies to prolong health-span in humans. Our studies may ultimately lead to fundamental insights in understanding, treating or preventing common diseases that affect our elders such as diabetes, dementia and opportunistic infectious diseases.
|Batista-Gonzalez, Ana; Singh, Rajat (2017) Lysosomal function in ?-cell survival during glucolipotoxicity. Ann Transl Med 5:471|
|Satori, Chad P; Ramezani, Marzieh; Koopmeiners, Joseph S et al. (2017) Checkpoints for Preliminary Identification of Small Molecules found Enriched in Autophagosomes and Activated Mast Cell Secretions Analyzed by Comparative UPLC/MSe. Anal Methods 9:46-54|
|Raz, Yotam; Guerrero-Ros, Ignacio; Maier, Andrea et al. (2017) Activation-Induced Autophagy Is Preserved in CD4+ T-Cells in Familial Longevity. J Gerontol A Biol Sci Med Sci 72:1201-1206|
|Martinez-Lopez, Nuria; Tarabra, Elena; Toledo, Miriam et al. (2017) System-wide Benefits of Intermeal Fasting by Autophagy. Cell Metab 26:856-871.e5|
|Maus, Mate; Cuk, Mario; Patel, Bindi et al. (2017) Store-Operated Ca2+ Entry Controls Induction of Lipolysis and the Transcriptional Reprogramming to Lipid Metabolism. Cell Metab 25:698-712|
|Klionsky, Daniel J (see original citation for additional authors) (2016) Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition). Autophagy 12:1-222|
|Martinez-Lopez, Nuria; Singh, Rajat (2016) Telemetric control of peripheral lipophagy by hypothalamic autophagy. Autophagy 12:1404-5|
|Martinez-Lopez, Nuria; Garcia-Macia, Marina; Sahu, Srabani et al. (2016) Autophagy in the CNS and Periphery Coordinate Lipophagy and Lipolysis in the Brown Adipose Tissue and Liver. Cell Metab 23:113-27|
|Champa, Devora; Orlacchio, Arturo; Patel, Bindi et al. (2016) Obatoclax kills anaplastic thyroid cancer cells by inducing lysosome neutralization and necrosis. Oncotarget 7:34453-71|
|Kaushik, Susmita; Cuervo, Ana Maria (2016) AMPK-dependent phosphorylation of lipid droplet protein PLIN2 triggers its degradation by CMA. Autophagy 12:432-8|
Showing the most recent 10 out of 130 publications