PMID- 23994476 OWN - NLM STAT- MEDLINE DCOM- 20140612 LR - 20220410 IS - 2211-1247 (Electronic) VI - 4 IP - 5 DP - 2013 Sep 12 TI - Increased mammalian lifespan and a segmental and tissue-specific slowing of aging after genetic reduction of mTOR expression. PG - 913-20 LID - S2211-1247(13)00392-6 [pii] LID - 10.1016/j.celrep.2013.07.030 [doi] AB - We analyzed aging parameters using a mechanistic target of rapamycin (mTOR) hypomorphic mouse model. Mice with two hypomorphic (mTOR(Delta/Delta)) alleles are viable but express mTOR at approximately 25% of wild-type levels. These animals demonstrate reduced mTORC1 and mTORC2 activity and exhibit an approximately 20% increase in median survival. While mTOR(Delta/Delta) mice are smaller than wild-type mice, these animals do not demonstrate any alterations in normalized food intake, glucose homeostasis, or metabolic rate. Consistent with their increased lifespan, mTOR(Delta/Delta) mice exhibited a reduction in a number of aging tissue biomarkers. Functional assessment suggested that, as mTOR(Delta/Delta) mice age, they exhibit a marked functional preservation in many, but not all, organ systems. Thus, in a mammalian model, while reducing mTOR expression markedly increases overall lifespan, it affects the age-dependent decline in tissue and organ function in a segmental fashion. CI - Copyright (c) 2013 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Wu, J Julie AU - Wu JJ AD - Center for Molecular Medicine, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA. FAU - Liu, Jie AU - Liu J FAU - Chen, Edmund B AU - Chen EB FAU - Wang, Jennifer J AU - Wang JJ FAU - Cao, Liu AU - Cao L FAU - Narayan, Nisha AU - Narayan N FAU - Fergusson, Marie M AU - Fergusson MM FAU - Rovira, Ilsa I AU - Rovira II FAU - Allen, Michele AU - Allen M FAU - Springer, Danielle A AU - Springer DA FAU - Lago, Cory U AU - Lago CU FAU - Zhang, Shuling AU - Zhang S FAU - DuBois, Wendy AU - DuBois W FAU - Ward, Theresa AU - Ward T FAU - deCabo, Rafael AU - deCabo R FAU - Gavrilova, Oksana AU - Gavrilova O FAU - Mock, Beverly AU - Mock B FAU - Finkel, Toren AU - Finkel T LA - eng GR - ZIA HL005012-16/Intramural NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Intramural DEP - 20130829 PL - United States TA - Cell Rep JT - Cell reports JID - 101573691 RN - EC 2.7.1.1 (mTOR protein, mouse) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Aging/physiology MH - Animals MH - Female MH - Glucose/metabolism MH - Homeostasis MH - Longevity/*physiology MH - Male MH - Mammals MH - Mice MH - Signal Transduction MH - TOR Serine-Threonine Kinases/biosynthesis/*deficiency/*genetics PMC - PMC3784301 MID - NIHMS511713 EDAT- 2013/09/03 06:00 MHDA- 2014/06/13 06:00 PMCR- 2013/09/26 CRDT- 2013/09/03 06:00 PHST- 2013/02/14 00:00 [received] PHST- 2013/07/11 00:00 [revised] PHST- 2013/07/24 00:00 [accepted] PHST- 2013/09/03 06:00 [entrez] PHST- 2013/09/03 06:00 [pubmed] PHST- 2014/06/13 06:00 [medline] PHST- 2013/09/26 00:00 [pmc-release] AID - S2211-1247(13)00392-6 [pii] AID - 10.1016/j.celrep.2013.07.030 [doi] PST - ppublish SO - Cell Rep. 2013 Sep 12;4(5):913-20. doi: 10.1016/j.celrep.2013.07.030. Epub 2013 Aug 29.