1
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Jamerson LE, Bradshaw PC. The Roles of White Adipose Tissue and Liver NADPH in Dietary Restriction-Induced Longevity. Antioxidants (Basel) 2024; 13:820. [PMID: 39061889 PMCID: PMC11273496 DOI: 10.3390/antiox13070820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 07/01/2024] [Accepted: 07/03/2024] [Indexed: 07/28/2024] Open
Abstract
Dietary restriction (DR) protocols frequently employ intermittent fasting. Following a period of fasting, meal consumption increases lipogenic gene expression, including that of NADPH-generating enzymes that fuel lipogenesis in white adipose tissue (WAT) through the induction of transcriptional regulators SREBP-1c and CHREBP. SREBP-1c knockout mice, unlike controls, did not show an extended lifespan on the DR diet. WAT cytoplasmic NADPH is generated by both malic enzyme 1 (ME1) and the pentose phosphate pathway (PPP), while liver cytoplasmic NADPH is primarily synthesized by folate cycle enzymes provided one-carbon units through serine catabolism. During the daily fasting period of the DR diet, fatty acids are released from WAT and are transported to peripheral tissues, where they are used for beta-oxidation and for phospholipid and lipid droplet synthesis, where monounsaturated fatty acids (MUFAs) may activate Nrf1 and inhibit ferroptosis to promote longevity. Decreased WAT NADPH from PPP gene knockout stimulated the browning of WAT and protected from a high-fat diet, while high levels of NADPH-generating enzymes in WAT and macrophages are linked to obesity. But oscillations in WAT [NADPH]/[NADP+] from feeding and fasting cycles may play an important role in maintaining metabolic plasticity to drive longevity. Studies measuring the WAT malate/pyruvate as a proxy for the cytoplasmic [NADPH]/[NADP+], as well as studies using fluorescent biosensors expressed in the WAT of animal models to monitor the changes in cytoplasmic [NADPH]/[NADP+], are needed during ad libitum and DR diets to determine the changes that are associated with longevity.
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Affiliation(s)
| | - Patrick C. Bradshaw
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
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2
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Jamerson LE, Bradshaw PC. Slowing reproductive ageing by preserving BCAT-1. Nat Metab 2024; 6:610-612. [PMID: 38418584 DOI: 10.1038/s42255-024-01009-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Affiliation(s)
- Leah E Jamerson
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Patrick C Bradshaw
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.
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3
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Zhang Q, Tian Y, Fu Z, Wu S, Lan H, Zhou X, Shen W, Lou Y. The role of serum-glucocorticoid regulated kinase 1 in reproductive viability: implications from prenatal programming and senescence. Mol Biol Rep 2024; 51:376. [PMID: 38427115 PMCID: PMC10907440 DOI: 10.1007/s11033-024-09341-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 02/09/2024] [Indexed: 03/02/2024]
Abstract
OBJECTIVE Organisms and cellular viability are of paramount importance to living creatures. Disruption of the balance between cell survival and apoptosis results in compromised viability and even carcinogenesis. One molecule involved in keeping this homeostasis is serum-glucocorticoid regulated kinase (SGK) 1. Emerging evidence points to a significant role of SGK1 in cell growth and survival, cell metabolism, reproduction, and life span, particularly in prenatal programming and reproductive senescence by the same token. Whether the hormone inducible SGK1 kinase is a major driver in the pathophysiological processes of prenatal programming and reproductive senescence? METHOD The PubMed/Medline, Web of Science, Embase/Ovid, and Elsevier Science Direct literature databases were searched for articles in English focusing on SGK1 published up to July 2023 RESULT: Emerging evidence is accumulating pointing to a pathophysiological role of the ubiquitously expressed SGK1 in the cellular and organismal viability. Under the regulation of specific hormones, extracellular stimuli, and various signals, SGK1 is involved in several biological processes relevant to viability, including cell proliferation and survival, cell migration and differentiation. In line, SGK1 contributes to the development of germ cells, embryos, and fetuses, whereas SGK1 inhibition leads to abnormal gametogenesis, embryo loss, and truncated reproductive lifespan. CONCLUTION SGK1 integrates a broad spectrum of effects to maintain the homeostasis of cell survival and apoptosis, conferring viability to multiple cell types as well as both simple and complex organisms, and thus ensuring appropriate prenatal development and reproductive lifespan.
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Affiliation(s)
- Qiying Zhang
- Department of Gynaecology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, No. 453 Tiyuchang Road, Hangzhou, 310007, Zhejiang, China
| | - Ye Tian
- Department of Gynaecology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, No. 453 Tiyuchang Road, Hangzhou, 310007, Zhejiang, China
| | - Zhujing Fu
- Jinhua Municipal Central Hospital, Jinhua, 321001, China
| | - Shuangyu Wu
- Medical School, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Huizhen Lan
- Department of Gynaecology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, No. 453 Tiyuchang Road, Hangzhou, 310007, Zhejiang, China
| | - Xuanle Zhou
- Department of Gynaecology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, No. 453 Tiyuchang Road, Hangzhou, 310007, Zhejiang, China
| | - Wendi Shen
- Department of Gynaecology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, No. 453 Tiyuchang Road, Hangzhou, 310007, Zhejiang, China
| | - Yiyun Lou
- Department of Gynaecology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, No. 453 Tiyuchang Road, Hangzhou, 310007, Zhejiang, China.
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4
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Lee YT, Savini M, Chen T, Yang J, Zhao Q, Ding L, Gao SM, Senturk M, Sowa JN, Wang JD, Wang MC. Mitochondrial GTP metabolism controls reproductive aging in C. elegans. Dev Cell 2023; 58:2718-2731.e7. [PMID: 37708895 PMCID: PMC10842941 DOI: 10.1016/j.devcel.2023.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/17/2023] [Accepted: 08/14/2023] [Indexed: 09/16/2023]
Abstract
Healthy mitochondria are critical for reproduction. During aging, both reproductive fitness and mitochondrial homeostasis decline. Mitochondrial metabolism and dynamics are key factors in supporting mitochondrial homeostasis. However, how they are coupled to control reproductive health remains unclear. We report that mitochondrial GTP (mtGTP) metabolism acts through mitochondrial dynamics factors to regulate reproductive aging. We discovered that germline-only inactivation of GTP- but not ATP-specific succinyl-CoA synthetase (SCS) promotes reproductive longevity in Caenorhabditis elegans. We further identified an age-associated increase in mitochondrial clustering surrounding oocyte nuclei, which is attenuated by GTP-specific SCS inactivation. Germline-only induction of mitochondrial fission factors sufficiently promotes mitochondrial dispersion and reproductive longevity. Moreover, we discovered that bacterial inputs affect mtGTP levels and dynamics factors to modulate reproductive aging. These results demonstrate the significance of mtGTP metabolism in regulating oocyte mitochondrial homeostasis and reproductive longevity and identify mitochondrial fission induction as an effective strategy to improve reproductive health.
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Affiliation(s)
- Yi-Tang Lee
- Integrative Program of Molecular and Biochemical Sciences, Baylor College of Medicine, Houston, TX 77030, USA; Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA
| | - Marzia Savini
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tao Chen
- Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA
| | - Jin Yang
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Qian Zhao
- Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA
| | - Lang Ding
- Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA; Graduate Program in Chemical, Physical & Structural Biology, Graduate School of Biomedical Science, Baylor College of Medicine, Houston, TX 77030, USA
| | - Shihong Max Gao
- Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA; Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA
| | - Mumine Senturk
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jessica N Sowa
- Department of Biology, West Chester University, West Chester, PA 19383, USA
| | - Jue D Wang
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Meng C Wang
- Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA; Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA.
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5
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Yamamoto KK, Savage-Dunn C. TGF-β pathways in aging and immunity: lessons from Caenorhabditis elegans. Front Genet 2023; 14:1220068. [PMID: 37732316 PMCID: PMC10507863 DOI: 10.3389/fgene.2023.1220068] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/23/2023] [Indexed: 09/22/2023] Open
Abstract
The Transforming Growth Factor-β (TGF-β) superfamily of signaling molecules plays critical roles in development, differentiation, homeostasis, and disease. Due to the conservation of these ligands and their signaling pathways, genetic studies in invertebrate systems including the nematode Caenorhabditis elegans have been instrumental in identifying signaling mechanisms. C. elegans is also a premier organism for research in longevity and healthy aging. Here we summarize current knowledge on the roles of TGF-β signaling in aging and immunity.
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Affiliation(s)
| | - Cathy Savage-Dunn
- Department of Biology, Queens College, and PhD Program in Biology, The Graduate Center, City University of New York, New York City, NY, United States
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6
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Lee YT, Savini M, Chen T, Yang J, Zhao Q, Ding L, Gao SM, Senturk M, Sowa J, Wang JD, Wang MC. Mitochondrial GTP Metabolism Regulates Reproductive Aging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.02.535296. [PMID: 37066227 PMCID: PMC10103970 DOI: 10.1101/2023.04.02.535296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Healthy mitochondria are critical for reproduction. During aging, both reproductive fitness and mitochondrial homeostasis decline. Mitochondrial metabolism and dynamics are key factors in supporting mitochondrial homeostasis. However, how they are coupled to control reproductive health remains unclear. We report that mitochondrial GTP metabolism acts through mitochondrial dynamics factors to regulate reproductive aging. We discovered that germline-only inactivation of GTP- but not ATP-specific succinyl-CoA synthetase (SCS), promotes reproductive longevity in Caenorhabditis elegans. We further revealed an age-associated increase in mitochondrial clustering surrounding oocyte nuclei, which is attenuated by the GTP-specific SCS inactivation. Germline-only induction of mitochondrial fission factors sufficiently promotes mitochondrial dispersion and reproductive longevity. Moreover, we discovered that bacterial inputs affect mitochondrial GTP and dynamics factors to modulate reproductive aging. These results demonstrate the significance of mitochondrial GTP metabolism in regulating oocyte mitochondrial homeostasis and reproductive longevity and reveal mitochondrial fission induction as an effective strategy to improve reproductive health.
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7
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Regulation of germline proteostasis by HSF1 and insulin/IGF-1 signaling. Biochem Soc Trans 2023; 51:501-512. [PMID: 36892215 DOI: 10.1042/bst20220616] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 03/10/2023]
Abstract
Protein homeostasis (proteostasis) is essential for cellular function and organismal health and requires the concerted actions of protein synthesis, folding, transport, and turnover. In sexually reproducing organisms, the immortal germline lineage passes genetic information across generations. Accumulating evidence indicates the importance of proteome integrity for germ cells as genome stability. As gametogenesis involves very active protein synthesis and is highly energy-demanding, it has unique requirements for proteostasis regulation and is sensitive to stress and nutrient availability. The heat shock factor 1 (HSF1), a key transcriptional regulator of cellular response to cytosolic and nuclear protein misfolding has evolutionarily conserved roles in germline development. Similarly, insulin/insulin-like growth factor-1 (IGF-1) signaling, a major nutrient-sensing pathway, impacts many aspects of gametogenesis. Here, we focus on HSF1 and IIS to review insights into their roles in germline proteostasis and discuss the implications on gamete quality control during stress and aging.
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Tang J, Ma YC, Chen YL, Yang RQ, Liu HC, Wang X, Ni B, Zou CG, Zhang KQ. Vitellogenin accumulation leads to reproductive senescence by impairing lysosomal function. SCIENCE CHINA. LIFE SCIENCES 2023; 66:439-452. [PMID: 36680676 DOI: 10.1007/s11427-022-2242-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 11/19/2022] [Indexed: 01/22/2023]
Abstract
The maintenance of proteostasis is essential for cellular and organism healthspan. How proteostasis collapse influences reproductive span remains largely unclear. In Caenorhabditis elegans, excess accumulation of vitellogenins, the major components in yolk proteins, is crucial for the development of the embryo and occurs throughout the whole body during the aging process. Here, we show that vitellogenin accumulation leads to reproduction cessation. Excess vitellogenin is accumulated in the intestine and transported into the germline, impairing lysosomal activity in these tissues. The lysosomal function in the germline is required for reproductive span by maintaining oocyte quality. In contrast, autophagy and sperm depletion are not involved in vitellogenin accumulation-induced reproductive aging. Our findings provide insights into how proteome imbalance has an impact on reproductive aging and imply that improvement of lysosomal function is an effective approach for mid-life intervention for maintaining reproductive health in mammals.
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Affiliation(s)
- Jie Tang
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Institute of Medical Biology, Chinese Academy of Medical Sciences, and Peking Union Medical College (CAMS & PUMC), Kunming, 650118, China
| | - Yi-Cheng Ma
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Yuan-Li Chen
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China
- Faculty of Basic Medicine, Kunming Medical University, Kunming, 650500, China
| | - Rui-Qiu Yang
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Heng-Chen Liu
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Xin Wang
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Baosen Ni
- Institute of Biology and Environmental Engineering, School of Chemistry, Biology & Environment, Yuxi Normal University, Yuxi, 653100, China
| | - Cheng-Gang Zou
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China.
| | - Ke-Qin Zhang
- Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China.
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9
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Endogenous DAF-16 spatiotemporal activity quantitatively predicts lifespan extension induced by dietary restriction. Commun Biol 2023; 6:203. [PMID: 36807646 PMCID: PMC9941123 DOI: 10.1038/s42003-023-04562-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 02/07/2023] [Indexed: 02/22/2023] Open
Abstract
In many organisms, dietary restriction (DR) leads to lifespan extension through the activation of cell protection and pro-longevity gene expression programs. In the nematode C. elegans, the DAF-16 transcription factor is a key aging regulator that governs the Insulin/IGF-1 signaling pathway and undergoes translocation from the cytoplasm to the nucleus of cells when animals are exposed to food limitation. However, how large is the influence of DR on DAF-16 activity, and its subsequent impact on lifespan has not been quantitatively determined. In this work, we assess the endogenous activity of DAF-16 under various DR regimes by coupling CRISPR/Cas9-enabled fluorescent tagging of DAF-16 with quantitative image analysis and machine learning. Our results indicate that DR regimes induce strong endogenous DAF-16 activity, although DAF-16 is less responsive in aged individuals. DAF-16 activity is in turn a robust predictor of mean lifespan in C. elegans, accounting for 78% of its variability under DR. Analysis of tissue-specific expression aided by a machine learning tissue classifier reveals that, under DR, the largest contribution to DAF-16 nuclear intensity originates from the intestine and neurons. DR also drives DAF-16 activity in unexpected locations such as the germline and intestinal nucleoli.
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10
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Reproductive Span of Caenorhabditis elegans Is Extended by Microbacterium sp. J Nematol 2022; 54:20220010. [PMID: 35860519 PMCID: PMC9260829 DOI: 10.2478/jofnem-2022-0010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Indexed: 11/20/2022] Open
Abstract
Abstract
The reproductive span (RS) of organisms could be affected by different factors during their lifetime. In the model nematode, Caenorhabditis elegans, RS is affected by both genetic and environmental factors. However, none of the factors identified so far were related to environmental bacteria, which may incidentally appear anywhere in the habitats of C. elegans. We aimed to find environmental bacteria that could affect the RS of C. elegans and related species. We tested 109 bacterial isolates and found that Microbacterium sp. CFBb37 increased the RS and lifespan of C. elegans but reduced its brood size. We studied the effect of M. sp. CFBb37 on the RS of Caenorhabditis briggsae, Caenorhabditis tropicalis, and another Rhabditidae family species, Protorhabditis sp., and found similar trends of RS extension in all three cases, suggesting that this bacterial species may induce the extension of RS broadly among Caenorhabditis species and possibly for many other Rhabditidae. This work will facilitate future research on the mechanism underlying the bacterial extension of RS of nematodes and possibly other animals.
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11
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Lu H, Ma L, Zhang Y, Feng Y, Zhang J, Wang S. Current Animal Model Systems for Ovarian Aging Research. Aging Dis 2022; 13:1183-1195. [PMID: 35855343 PMCID: PMC9286907 DOI: 10.14336/ad.2021.1209] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/07/2021] [Indexed: 11/15/2022] Open
Abstract
Ovarian aging leads to menopause, loss of fertility and other disorders in multiple organs, which brings great distress to women. For ethical reasons, it is impossible to use humans as direct study subjects for aging research. Therefore, biomedical researchers have employed different non-human organisms to study ovarian aging, including worms, fruit flies, fishes, amphibians, birds, mice, rats, cavies, rabbits, pigs, sheep, cows, horses, monkeys, and apes. Because each of these model organisms has its own features, multiple factors, such as size, anatomical structure, cost, ease of operation, fertility, generation time, lifespan, and gene heredity, should be carefully considered when selecting a model system to study ovarian aging. An appropriate model organism would help researchers explore the risk factors and elucidate molecular mechanisms underlying declined ovarian functions, which might be conducive to preventing or delaying the ovarian aging process. This article will offer an overview on several currently available and commonly used model organisms for ovarian aging research by comparing their pros and cons. In doing so, we hope to provide useful information for ovarian aging researchers.
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Affiliation(s)
- Huan Lu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Lingwei Ma
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Yan Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Yanzhi Feng
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Jinjin Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
- Correspondence should be addressed to: Dr. Shixuan Wang () and Dr. Jinjin Zhang (), Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan, Hubei, China
| | - Shixuan Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
- Correspondence should be addressed to: Dr. Shixuan Wang () and Dr. Jinjin Zhang (), Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan, Hubei, China
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12
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Martinez-Miguel VE, Lujan C, Espie-Caullet T, Martinez-Martinez D, Moore S, Backes C, Gonzalez S, Galimov ER, Brown AEX, Halic M, Tomita K, Rallis C, von der Haar T, Cabreiro F, Bjedov I. Increased fidelity of protein synthesis extends lifespan. Cell Metab 2021; 33:2288-2300.e12. [PMID: 34525330 PMCID: PMC8570412 DOI: 10.1016/j.cmet.2021.08.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 05/06/2021] [Accepted: 08/30/2021] [Indexed: 12/20/2022]
Abstract
Loss of proteostasis is a fundamental process driving aging. Proteostasis is affected by the accuracy of translation, yet the physiological consequence of having fewer protein synthesis errors during multi-cellular organismal aging is poorly understood. Our phylogenetic analysis of RPS23, a key protein in the ribosomal decoding center, uncovered a lysine residue almost universally conserved across all domains of life, which is replaced by an arginine in a small number of hyperthermophilic archaea. When introduced into eukaryotic RPS23 homologs, this mutation leads to accurate translation, as well as heat shock resistance and longer life, in yeast, worms, and flies. Furthermore, we show that anti-aging drugs such as rapamycin, Torin1, and trametinib reduce translation errors, and that rapamycin extends further organismal longevity in RPS23 hyperaccuracy mutants. This implies a unified mode of action for diverse pharmacological anti-aging therapies. These findings pave the way for identifying novel translation accuracy interventions to improve aging.
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Affiliation(s)
| | - Celia Lujan
- UCL Cancer Institute, Paul O'Gorman Building, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Tristan Espie-Caullet
- UCL Cancer Institute, Paul O'Gorman Building, University College London, 72 Huntley Street, London WC1E 6DD, UK
| | - Daniel Martinez-Martinez
- MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK; Institute of Clinical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Saul Moore
- MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK; Institute of Clinical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Cassandra Backes
- MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK; Institute of Clinical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Suam Gonzalez
- School of Health, Sport and Bioscience, University of East London, Water Lane, London E15 4LZ, UK
| | - Evgeniy R Galimov
- MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK; Institute of Clinical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - André E X Brown
- MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK; Institute of Clinical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Mario Halic
- Department of Structural Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Kazunori Tomita
- Centre for Genome Engineering and Maintenance, College of Health, Medicine and Life Sciences, Brunel University London, London UB8 3PH, UK
| | - Charalampos Rallis
- School of Health, Sport and Bioscience, University of East London, Water Lane, London E15 4LZ, UK
| | - Tobias von der Haar
- Kent Fungal Group, School of Biosciences, Division of Natural Sciences, University of Kent, Canterbury CT2 7NJ, UK
| | - Filipe Cabreiro
- MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK; Institute of Clinical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK; Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph Stelzmann Strasse 26, 50931 Cologne, Germany.
| | - Ivana Bjedov
- UCL Cancer Institute, Paul O'Gorman Building, University College London, 72 Huntley Street, London WC1E 6DD, UK; Department of Medical Physics and Biomedical Engineering, University College London, Malet Place Engineering Building, Gower Street, London WC1E 6BT, UK.
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13
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Scharf A, Pohl F, Egan BM, Kocsisova Z, Kornfeld K. Reproductive Aging in Caenorhabditis elegans: From Molecules to Ecology. Front Cell Dev Biol 2021; 9:718522. [PMID: 34604218 PMCID: PMC8481778 DOI: 10.3389/fcell.2021.718522] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/04/2021] [Indexed: 11/13/2022] Open
Abstract
Aging animals display a broad range of progressive degenerative changes, and one of the most fascinating is the decline of female reproductive function. In the model organism Caenorhabditis elegans, hermaphrodites reach a peak of progeny production on day 2 of adulthood and then display a rapid decline; progeny production typically ends by day 8 of adulthood. Since animals typically survive until day 15 of adulthood, there is a substantial post reproductive lifespan. Here we review the molecular and cellular changes that occur during reproductive aging, including reductions in stem cell number and activity, slowing meiotic progression, diminished Notch signaling, and deterioration of germ line and oocyte morphology. Several interventions have been identified that delay reproductive aging, including mutations, drugs and environmental factors such as temperature. The detailed description of reproductive aging coupled with interventions that delay this process have made C. elegans a leading model system to understand the mechanisms that drive reproductive aging. While reproductive aging has dramatic consequences for individual fertility, it also has consequences for the ecology of the population. Population dynamics are driven by birth and death, and reproductive aging is one important factor that influences birth rate. A variety of theories have been advanced to explain why reproductive aging occurs and how it has been sculpted during evolution. Here we summarize these theories and discuss the utility of C. elegans for testing mechanistic and evolutionary models of reproductive aging.
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Affiliation(s)
- Andrea Scharf
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, United States
| | - Franziska Pohl
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, United States.,Department of Medicine, Washington University School of Medicine, St. Louis, MO, United States
| | - Brian M Egan
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, United States
| | - Zuzana Kocsisova
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, United States
| | - Kerry Kornfeld
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, United States
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14
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Edwards SL, Erdenebat P, Morphis AC, Kumar L, Wang L, Chamera T, Georgescu C, Wren JD, Li J. Insulin/IGF-1 signaling and heat stress differentially regulate HSF1 activities in germline development. Cell Rep 2021; 36:109623. [PMID: 34469721 PMCID: PMC8442575 DOI: 10.1016/j.celrep.2021.109623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 05/25/2021] [Accepted: 08/06/2021] [Indexed: 12/13/2022] Open
Abstract
Germline development is sensitive to nutrient availability and environmental perturbation. Heat shock transcription factor 1 (HSF1), a key transcription factor driving the cellular heat shock response (HSR), is also involved in gametogenesis. The precise function of HSF1 (HSF-1 in C. elegans) and its regulation in germline development are poorly understood. Using the auxin-inducible degron system in C. elegans, we uncovered a role of HSF-1 in progenitor cell proliferation and early meiosis and identified a compact but important transcriptional program of HSF-1 in germline development. Interestingly, heat stress only induces the canonical HSR in a subset of germ cells but impairs HSF-1 binding at its developmental targets. Conversely, insulin/insulin growth factor 1 (IGF-1) signaling dictates the requirement for HSF-1 in germline development and functions through repressing FOXO/DAF-16 in the soma to activate HSF-1 in germ cells. We propose that this non-cell-autonomous mechanism couples nutrient-sensing insulin/IGF-1 signaling to HSF-1 activation to support homeostasis in rapid germline growth.
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Affiliation(s)
- Stacey L Edwards
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Purevsuren Erdenebat
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Allison C Morphis
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Lalit Kumar
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Lai Wang
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Tomasz Chamera
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Constantin Georgescu
- Genes & Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Jonathan D Wren
- Genes & Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Jian Li
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.
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15
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Achache H, Falk R, Lerner N, Beatus T, Tzur YB. Oocyte aging is controlled by mitogen-activated protein kinase signaling. Aging Cell 2021; 20:e13386. [PMID: 34061407 PMCID: PMC8208789 DOI: 10.1111/acel.13386] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 03/25/2021] [Accepted: 05/08/2021] [Indexed: 12/11/2022] Open
Abstract
Oogenesis is one of the first processes to fail during aging. In women, most oocytes cannot successfully complete meiotic divisions already during the fourth decade of life. Studies of the nematode Caenorhabditis elegans have uncovered conserved genetic pathways that control lifespan, but our knowledge regarding reproductive aging in worms and humans is limited. Specifically, little is known about germline internal signals that dictate the oogonial biological clock. Here, we report a thorough characterization of the changes in the worm germline during aging. We found that shortly after ovulation halts, germline proliferation declines, while apoptosis continues, leading to a gradual reduction in germ cell numbers. In late aging stages, we observed that meiotic progression is disturbed and crossover designation and DNA double-strand break repair decrease. In addition, we detected a decline in the quality of mature oocytes during aging, as reflected by decreasing size and elongation of interhomolog distance, a phenotype also observed in human oocytes. Many of these altered processes were previously attributed to MAPK signaling variations in young worms. In support of this, we observed changes in activation dynamics of MPK-1 during aging. We therefore tested the hypothesis that MAPK controls oocyte quality in aged worms using both genetic and pharmacological tools. We found that in mutants with high levels of activated MPK-1, oocyte quality deteriorates more rapidly than in wild-type worms, whereas reduction of MPK-1 levels enhances quality. Thus, our data suggest that MAPK signaling controls germline aging and could be used to attenuate the rate of oogenesis quality decline.
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Affiliation(s)
- Hanna Achache
- Department of GeneticsInstitute of Life SciencesThe Hebrew University of JerusalemJerusalemIsrael
| | - Roni Falk
- Department of GeneticsInstitute of Life SciencesThe Hebrew University of JerusalemJerusalemIsrael
| | - Noam Lerner
- Department of NeurobiologyThe Institute of Life ScienceThe Hebrew University of JerusalemJerusalemIsrael
- The Alexander Grass Center for BioengineeringThe Rachel and Selim Benin School of Computer Science and EngineeringThe Hebrew University of JerusalemJerusalemIsrael
| | - Tsevi Beatus
- Department of NeurobiologyThe Institute of Life ScienceThe Hebrew University of JerusalemJerusalemIsrael
- The Alexander Grass Center for BioengineeringThe Rachel and Selim Benin School of Computer Science and EngineeringThe Hebrew University of JerusalemJerusalemIsrael
| | - Yonatan B. Tzur
- Department of GeneticsInstitute of Life SciencesThe Hebrew University of JerusalemJerusalemIsrael
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16
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Jiao J, Kavdia K, Pagala V, Palmer L, Finkelstein D, Fan Y, Peng J, Demontis F. An age-downregulated ribosomal RpS28 protein variant regulates the muscle proteome. G3-GENES GENOMES GENETICS 2021; 11:6273667. [PMID: 33974070 PMCID: PMC8495913 DOI: 10.1093/g3journal/jkab165] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/06/2021] [Indexed: 11/14/2022]
Abstract
Recent evidence indicates that the composition of the ribosome is heterogeneous and that multiple types of specialized ribosomes regulate the synthesis of specific protein subsets. In Drosophila, we find that expression of the ribosomal RpS28 protein variants RpS28a and RpS28-like preferentially occurs in the germline, a tissue resistant to aging and that it significantly declines in skeletal muscle during aging. Muscle-specific overexpression of RpS28a at levels similar to those seen in the germline decreases early mortality and promotes the synthesis of a subset of proteins with known anti-aging roles, some of which have preferential expression in the germline. These findings indicate a contribution of specialized ribosomal proteins to the regulation of the muscle proteome during aging.
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Affiliation(s)
- Jianqin Jiao
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Kanisha Kavdia
- Department of Structural Biology, Center for Proteomics and Metabolomics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Vishwajeeth Pagala
- Department of Structural Biology, Center for Proteomics and Metabolomics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Lance Palmer
- Department of Computational Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - David Finkelstein
- Department of Computational Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Yiping Fan
- Department of Computational Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Junmin Peng
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.,Department of Structural Biology, Center for Proteomics and Metabolomics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Fabio Demontis
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
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17
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Shukla S, Srividya K, Nazir A. Not a piece of junk anymore: Pseudogene T04B2.1 performs non-conventional regulatory role and modulates aggregation of α- synuclein and β-amyloid proteins in C. elegans. Biochem Biophys Res Commun 2021; 539:8-14. [PMID: 33412418 DOI: 10.1016/j.bbrc.2020.12.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 12/09/2020] [Indexed: 12/27/2022]
Abstract
The conventional notions of pseudogenes being 'junk DNA' have largely been offset as research studies have established their role in multiple biological processes. Our studies towards identification of genetic modulators employing C. elegans model, that associate reproductive health and age-related neurodegenerative diseases, led us to identification and functional characterization of a pseudogene T04B2.1, which when knocked down, exacerbates the aggregation of α-Synuclein and β-Amyloid proteins, induces lipid deposition and alters morphometric endpoints in worms. Whole transcriptome analysis of worms under knockdown condition of T04B2.1 revealed an altered expression of 187 sequences, most of these being non-coding RNAs, miRNAs and piRNAs modulating the RNAi regulatory processes. Our gene ontology and pathway enrichment analysis demonstrated the role of T04B2.1 in protein quality control, metabolic pathways and development. We further performed a signature motif search and successfully identified a common motif that is present between all piRNA and miRNA molecules, which are significantly altered upon T04B2.1 silencing. This study unveils the non-conventional regulatory role of pseudogene T04B2.1 with respect to effects associated with neurodegenerative diseases and encourages further studies to decipher the regulatory mechanism governed by pseudogenes.
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Affiliation(s)
- Shikha Shukla
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Kottapalli Srividya
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Aamir Nazir
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow, 226031, India.
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18
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Hartsough LA, Park M, Kotlajich MV, Lazar JT, Han B, Lin CCJ, Musteata E, Gambill L, Wang MC, Tabor JJ. Optogenetic control of gut bacterial metabolism to promote longevity. eLife 2020; 9:56849. [PMID: 33325823 PMCID: PMC7744093 DOI: 10.7554/elife.56849] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 12/07/2020] [Indexed: 12/21/2022] Open
Abstract
Gut microbial metabolism is associated with host longevity. However, because it requires direct manipulation of microbial metabolism in situ, establishing a causal link between these two processes remains challenging. We demonstrate an optogenetic method to control gene expression and metabolite production from bacteria residing in the host gut. We genetically engineer an Escherichia coli strain that secretes colanic acid (CA) under the quantitative control of light. Using this optogenetically-controlled strain to induce CA production directly in the Caenorhabditis elegans gut, we reveal the local effect of CA in protecting intestinal mitochondria from stress-induced hyper-fragmentation. We also demonstrate that the lifespan-extending effect of this strain is positively correlated with the intensity of green light, indicating a dose-dependent CA benefit on the host. Thus, optogenetics can be used to achieve quantitative and temporal control of gut bacterial metabolism in order to reveal its local and systemic effects on host health and aging.
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Affiliation(s)
| | | | | | - John Tyler Lazar
- Department of Chemical and Biomolecular Engineering, Houston, United States
| | - Bing Han
- Huffington Center on Aging, Houston, United States
| | - Chih-Chun J Lin
- Huffington Center on Aging, Houston, United States.,Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, United States
| | - Elena Musteata
- Systems, Synthetic, and Physical Biology Program, Rice University, Houston, United States
| | - Lauren Gambill
- Systems, Synthetic, and Physical Biology Program, Rice University, Houston, United States
| | - Meng C Wang
- Huffington Center on Aging, Houston, United States.,Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, United States.,Howard Hughes Medical Institute, Houston, United States
| | - Jeffrey J Tabor
- Department of Bioengineering, Houston, United States.,Systems, Synthetic, and Physical Biology Program, Rice University, Houston, United States.,Department of Biosciences, Houston, United States
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19
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Yee Z, Lim SHY, Ng LF, Gruber J. Inhibition of mTOR decreases insoluble proteins burden by reducing translation in C. elegans. Biogerontology 2020; 22:101-118. [PMID: 33159806 DOI: 10.1007/s10522-020-09906-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 11/02/2020] [Indexed: 02/07/2023]
Abstract
Aging animals accumulate insoluble proteins as a consequence of a decline of proteostatic maintenance with age. In Caenorhabditis elegans, for instance, levels of detergent-insoluble proteins increase with age. In longer-lived strains of C. elegans, this accumulation occurs more slowly, implying a link to lifespan determination. We further explored this link and found that detergent-insoluble proteins accumulate more rapidly at higher temperatures, a condition where lifespan is short. We employed a C. elegans strain carrying a GFP transcriptional reporter under the control of a heat shock (hsp-16.2) promoter to investigate the dynamics of proteostatic failure in individual nematodes. We found that early, sporadic activation of hsp-16.2 was predictive of shorter remaining lifespan in individual nematodes. Exposure to rapamycin, resulting in reduced mTOR signaling, delayed spurious expression, extended lifespan, and delayed accumulation of insoluble proteins, suggesting that targets downstream of the mTOR pathway regulate the accumulation of insoluble proteins. We specifically explored ribosomal S6 kinase (rsks-1) as one such candidate and found that RNAi against rsks-1 also resulted in less age-dependent accumulation of insoluble proteins and extended lifespan. Our results demonstrate that inhibition of protein translation via reduced mTOR signaling resulted in slower accumulation of insoluble proteins, delayed proteostatic crisis, and extended lifespan in C. elegans.
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Affiliation(s)
- Zhuangli Yee
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Shaun Hsien Yang Lim
- Aging Research Laboratory, Science Division, Yale-NUS College, Singapore, Singapore
| | - Li Fang Ng
- Aging Research Laboratory, Science Division, Yale-NUS College, Singapore, Singapore
| | - Jan Gruber
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,Aging Research Laboratory, Science Division, Yale-NUS College, Singapore, Singapore.
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20
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Guerrero-Rubio MA, Hernández-García S, Escribano J, Jiménez-Atiénzar M, Cabanes J, García-Carmona F, Gandía-Herrero F. Betalain health-promoting effects after ingestion in Caenorhabditis elegans are mediated by DAF-16/FOXO and SKN-1/Nrf2 transcription factors. Food Chem 2020; 330:127228. [DOI: 10.1016/j.foodchem.2020.127228] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/18/2020] [Accepted: 06/01/2020] [Indexed: 01/03/2023]
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21
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Kumar S, Egan BM, Kocsisova Z, Schneider DL, Murphy JT, Diwan A, Kornfeld K. Lifespan Extension in C. elegans Caused by Bacterial Colonization of the Intestine and Subsequent Activation of an Innate Immune Response. Dev Cell 2019; 49:100-117.e6. [PMID: 30965033 DOI: 10.1016/j.devcel.2019.03.010] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 02/04/2019] [Accepted: 03/12/2019] [Indexed: 10/27/2022]
Abstract
Mechanisms that control aging are important yet poorly defined. To discover longevity control genes, we performed a forward genetic screen for delayed reproductive aging in C. elegans. Here, we show that am117 is a nonsense mutation in the phm-2 gene, which encodes a protein homologous to human scaffold attachment factor B. phm-2(lf) mutant worms have an abnormal pharynx grinder, which allows live bacteria to accumulate in the intestine. This defect shortens lifespan on highly pathogenic bacteria but extends lifespan and health span on the standard E. coli diet by activating innate immunity pathways that lead to bacterial avoidance behavior and dietary restriction. eat-2(lf) mutants displayed a similar phenotype, indicating accumulation of live bacteria also triggers extended longevity in this mutant. The analysis of phm-2 elucidates connections between pathogen response and aging by defining a mechanism of longevity extension in C. elegans-bacterial colonization, innate immune activation, and bacterial avoidance behavior.
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Affiliation(s)
- Sandeep Kumar
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Bone & Mineral Diseases, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Brian M Egan
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Zuzana Kocsisova
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Daniel L Schneider
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - John T Murphy
- Center for Cardiovascular Research and Division of Cardiology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Abhinav Diwan
- Center for Cardiovascular Research and Division of Cardiology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Kerry Kornfeld
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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22
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Zhou B, Kreuzer J, Kumsta C, Wu L, Kamer KJ, Cedillo L, Zhang Y, Li S, Kacergis MC, Webster CM, Fejes-Toth G, Naray-Fejes-Toth A, Das S, Hansen M, Haas W, Soukas AA. Mitochondrial Permeability Uncouples Elevated Autophagy and Lifespan Extension. Cell 2019; 177:299-314.e16. [PMID: 30929899 DOI: 10.1016/j.cell.2019.02.013] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 11/21/2018] [Accepted: 02/11/2019] [Indexed: 12/16/2022]
Abstract
Autophagy is required in diverse paradigms of lifespan extension, leading to the prevailing notion that autophagy is beneficial for longevity. However, why autophagy is harmful in certain contexts remains unexplained. Here, we show that mitochondrial permeability defines the impact of autophagy on aging. Elevated autophagy unexpectedly shortens lifespan in C. elegans lacking serum/glucocorticoid regulated kinase-1 (sgk-1) because of increased mitochondrial permeability. In sgk-1 mutants, reducing levels of autophagy or mitochondrial permeability transition pore (mPTP) opening restores normal lifespan. Remarkably, low mitochondrial permeability is required across all paradigms examined of autophagy-dependent lifespan extension. Genetically induced mPTP opening blocks autophagy-dependent lifespan extension resulting from caloric restriction or loss of germline stem cells. Mitochondrial permeability similarly transforms autophagy into a destructive force in mammals, as liver-specific Sgk knockout mice demonstrate marked enhancement of hepatocyte autophagy, mPTP opening, and death with ischemia/reperfusion injury. Targeting mitochondrial permeability may maximize benefits of autophagy in aging.
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Affiliation(s)
- Ben Zhou
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Johannes Kreuzer
- Center for Cancer Research, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Caroline Kumsta
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Lianfeng Wu
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Kimberli J Kamer
- Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA; Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Lucydalila Cedillo
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Yuyao Zhang
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Sainan Li
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Michael C Kacergis
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Christopher M Webster
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Geza Fejes-Toth
- Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA
| | - Aniko Naray-Fejes-Toth
- Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA
| | - Sudeshna Das
- MGH Biomedical Informatics Core and Department of Neurology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Malene Hansen
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Wilhelm Haas
- Center for Cancer Research, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Alexander A Soukas
- Department of Medicine, Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
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23
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Sebastiani P, Gurinovich A, Nygaard M, Sasaki T, Sweigart B, Bae H, Andersen SL, Villa F, Atzmon G, Christensen K, Arai Y, Barzilai N, Puca A, Christiansen L, Hirose N, Perls TT. APOE Alleles and Extreme Human Longevity. J Gerontol A Biol Sci Med Sci 2019; 74:44-51. [PMID: 30060062 PMCID: PMC6298189 DOI: 10.1093/gerona/gly174] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Indexed: 12/11/2022] Open
Abstract
We assembled a collection of 28,297 participants from seven studies of longevity and healthy aging comprising New England Centenarian, Long Life Family, Longevity Gene Population, Southern Italian Centenarian, Japanese Centenarian, the Danish Longevity, and the Health and Retirement Studies to investigate the association between the APOE alleles ε2ε3 and ε4 and extreme human longevity and age at death. By using three different genetic models and two definitions of extreme longevity based on either a threshold model or age at death, we show that ε4 is associated with a substantially decreased odds for extreme longevity, and increased risk for death that persists even beyond ages reached by less than 1% of the population. We also show that carrying the ε2ε2 or ε2ε3 genotype is associated with significantly increased odds to reach extreme longevity, with decreased risk for death compared with carrying the genotype ε3ε3 but with only a modest reduction in risk for death beyond an age reached by less than 1% of the population.
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Affiliation(s)
- Paola Sebastiani
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts
| | - Anastasia Gurinovich
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts
- Bioinformatics Program, Boston University, Massachusetts
| | - Marianne Nygaard
- The Danish Aging Research Center and The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Takashi Sasaki
- Center for Supercentenarian Research, Keio University, Tokyo, Japan
| | - Benjamin Sweigart
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts
| | - Harold Bae
- College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon
| | - Stacy L Andersen
- Geriatric Section, Department of Medicine, Boston University School of Medicine and Boston Medical Center, Boston, Massachusetts
| | - Francesco Villa
- Cardiovascular Research Unit, IRCCS MultiMedica, Milan, Italy
| | - Gil Atzmon
- Faculty of Natural Science, University of Haifa, Israel
- Department of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York
| | - Kaare Christensen
- The Danish Aging Research Center and The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Yasumichi Arai
- Center for Supercentenarian Research, Keio University, Tokyo, Japan
| | - Nir Barzilai
- Department of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, New York
| | - Annibale Puca
- Cardiovascular Research Unit, IRCCS MultiMedica, Milan, Italy
- Department of Medicine and Surgery, University of Salerno, Baronissi, Italy
| | - Lene Christiansen
- The Danish Aging Research Center and The Danish Twin Registry, Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Nobuyoshi Hirose
- Center for Supercentenarian Research, Keio University, Tokyo, Japan
| | - Thomas T Perls
- Geriatric Section, Department of Medicine, Boston University School of Medicine and Boston Medical Center, Boston, Massachusetts
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24
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Hühne R, Kessler V, Fürstberger A, Kühlwein S, Platzer M, Sühnel J, Lausser L, Kestler HA. 3D Network exploration and visualisation for lifespan data. BMC Bioinformatics 2018; 19:390. [PMID: 30352578 PMCID: PMC6199797 DOI: 10.1186/s12859-018-2393-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 09/25/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The Ageing Factor Database AgeFactDB contains a large number of lifespan observations for ageing-related factors like genes, chemical compounds, and other factors such as dietary restriction in different organisms. These data provide quantitative information on the effect of ageing factors from genetic interventions or manipulations of lifespan. Analysis strategies beyond common static database queries are highly desirable for the inspection of complex relationships between AgeFactDB data sets. 3D visualisation can be extremely valuable for advanced data exploration. RESULTS Different types of networks and visualisation strategies are proposed, ranging from basic networks of individual ageing factors for a single species to complex multi-species networks. The augmentation of lifespan observation networks by annotation nodes, like gene ontology terms, is shown to facilitate and speed up data analysis. We developed a new Javascript 3D network viewer JANet that provides the proposed visualisation strategies and has a customised interface for AgeFactDB data. It enables the analysis of gene lists in combination with AgeFactDB data and the interactive visualisation of the results. CONCLUSION Interactive 3D network visualisation allows to supplement complex database queries by a visually guided exploration process. The JANet interface allows gaining deeper insights into lifespan data patterns not accessible by common database queries alone. These concepts can be utilised in many other research fields.
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Affiliation(s)
- Rolf Hühne
- Institute of Medical Systems Biology - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
- Leibniz Institute on Aging - Fritz Lipmann Institute, Beutenbergstr. 11, Jena, 07745 Germany
| | - Viktor Kessler
- Institute of Medical Systems Biology - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
- Institute of Neural Information Processing - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
| | - Axel Fürstberger
- Institute of Medical Systems Biology - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
| | - Silke Kühlwein
- Institute of Medical Systems Biology - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
| | - Matthias Platzer
- Leibniz Institute on Aging - Fritz Lipmann Institute, Beutenbergstr. 11, Jena, 07745 Germany
| | - Jürgen Sühnel
- Leibniz Institute on Aging - Fritz Lipmann Institute, Beutenbergstr. 11, Jena, 07745 Germany
| | - Ludwig Lausser
- Institute of Medical Systems Biology - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
| | - Hans A. Kestler
- Institute of Medical Systems Biology - Ulm University, Albert-Einstein-Allee 11, Ulm, 89081 Germany
- Leibniz Institute on Aging - Fritz Lipmann Institute, Beutenbergstr. 11, Jena, 07745 Germany
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25
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Cooper EB, Kruuk LEB. Ageing with a silver-spoon: A meta-analysis of the effect of developmental environment on senescence. Evol Lett 2018; 2:460-471. [PMID: 30283695 PMCID: PMC6145406 DOI: 10.1002/evl3.79] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/18/2018] [Accepted: 07/26/2018] [Indexed: 12/14/2022] Open
Abstract
What determines variation between individuals in how they senesce, and are environmental conditions experienced during development relevant to late-life performance? We report a meta-analysis of studies of wild populations to determine how the quality of the environment experienced during development affects rates of survival and reproductive senescence. From studies of 14 bird or mammal species, we calculated effect sizes for the interaction between the effects of environmental quality during development and age in predicting survival (N = 18) or reproduction (N = 30) over time in late life. We found no evidence that developmental environment affected rates of survival senescence (βmean = -1.2 × 10-4 ± 0.022SE). However, a better developmental environment was associated with slower rates of reproductive senescence in late life (βmean = 0.062 ± 0.023SE), indicating a small, but significant, "silver-spoon" effect of early-life conditions that persisted through to late life. Our results illustrate how the effects of environmental conditions during development can persist throughout life, and indicate one possible cause of phenotypic plasticity in senescence.
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Affiliation(s)
- Eve B. Cooper
- Division of Ecology and Evolution, Research School of BiologyThe Australian National UniversityActonCanberraACT2601Australia
| | - Loeske E. B. Kruuk
- Division of Ecology and Evolution, Research School of BiologyThe Australian National UniversityActonCanberraACT2601Australia
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26
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Sutphin GL, Backer G, Sheehan S, Bean S, Corban C, Liu T, Peters MJ, van Meurs JBJ, Murabito JM, Johnson AD, Korstanje R. Caenorhabditis elegans orthologs of human genes differentially expressed with age are enriched for determinants of longevity. Aging Cell 2017; 16:672-682. [PMID: 28401650 PMCID: PMC5506438 DOI: 10.1111/acel.12595] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2017] [Indexed: 12/21/2022] Open
Abstract
We report a systematic RNAi longevity screen of 82 Caenorhabditis elegans genes selected based on orthology to human genes differentially expressed with age. We find substantial enrichment in genes for which knockdown increased lifespan. This enrichment is markedly higher than published genomewide longevity screens in C. elegans and similar to screens that preselected candidates based on longevity‐correlated metrics (e.g., stress resistance). Of the 50 genes that affected lifespan, 46 were previously unreported. The five genes with the greatest impact on lifespan (>20% extension) encode the enzyme kynureninase (kynu‐1), a neuronal leucine‐rich repeat protein (iglr‐1), a tetraspanin (tsp‐3), a regulator of calcineurin (rcan‐1), and a voltage‐gated calcium channel subunit (unc‐36). Knockdown of each gene extended healthspan without impairing reproduction. kynu‐1(RNAi) alone delayed pathology in C. elegans models of Alzheimer's disease and Huntington's disease. Each gene displayed a distinct pattern of interaction with known aging pathways. In the context of published work, kynu‐1, tsp‐3, and rcan‐1 are of particular interest for immediate follow‐up. kynu‐1 is an understudied member of the kynurenine metabolic pathway with a mechanistically distinct impact on lifespan. Our data suggest that tsp‐3 is a novel modulator of hypoxic signaling and rcan‐1 is a context‐specific calcineurin regulator. Our results validate C. elegans as a comparative tool for prioritizing human candidate aging genes, confirm age‐associated gene expression data as valuable source of novel longevity determinants, and prioritize select genes for mechanistic follow‐up.
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Affiliation(s)
| | - Grant Backer
- The Jackson Laboratory; 600 Main Street Bar Harbor ME 04609 USA
| | - Susan Sheehan
- The Jackson Laboratory; 600 Main Street Bar Harbor ME 04609 USA
| | - Shannon Bean
- The Jackson Laboratory; 600 Main Street Bar Harbor ME 04609 USA
| | - Caroline Corban
- The Jackson Laboratory; 600 Main Street Bar Harbor ME 04609 USA
| | - Teresa Liu
- The Jackson Laboratory; 600 Main Street Bar Harbor ME 04609 USA
| | - Marjolein J. Peters
- Department of Internal Medicine; Erasmus Medical Center; Postbus 2040 3000 CA Rotterdam The Netherlands
| | - Joyce B. J. van Meurs
- Department of Internal Medicine; Erasmus Medical Center; Postbus 2040 3000 CA Rotterdam The Netherlands
| | - Joanne M. Murabito
- Section of General Internal Medicine; Boston University School of Medicine; 801 Massachusetts Ave, Crosstown Center Boston MA 02118 USA
- The National Heart, Lung, and Blood Institute's Framingham Heart Study; 73 Mt. Wayte Ave, Suite 2 Framingham MA 01702-5827 USA
| | - Andrew D. Johnson
- The National Heart, Lung, and Blood Institute's Framingham Heart Study; 73 Mt. Wayte Ave, Suite 2 Framingham MA 01702-5827 USA
- Population Sciences Branch; National Heart, Lung, and Blood Institute; Building 31, Room 5A52, 31 Center Drive MSC 2486 Bethesda MD 20892 USA
| | - Ron Korstanje
- The Jackson Laboratory; 600 Main Street Bar Harbor ME 04609 USA
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27
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Han B, Sivaramakrishnan P, Lin CCJ, Neve IAA, He J, Tay LWR, Sowa JN, Sizovs A, Du G, Wang J, Herman C, Wang MC. Microbial Genetic Composition Tunes Host Longevity. Cell 2017; 169:1249-1262.e13. [PMID: 28622510 PMCID: PMC5635830 DOI: 10.1016/j.cell.2017.05.036] [Citation(s) in RCA: 206] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 12/16/2016] [Accepted: 05/24/2017] [Indexed: 12/21/2022]
Abstract
Homeostasis of the gut microbiota critically influences host health and aging. Developing genetically engineered probiotics holds great promise as a new therapeutic paradigm to promote healthy aging. Here, through screening 3,983 Escherichia coli mutants, we discovered that 29 bacterial genes, when deleted, increase longevity in the host Caenorhabditis elegans. A dozen of these bacterial mutants also protect the host from age-related progression of tumor growth and amyloid-beta accumulation. Mechanistically, we discovered that five bacterial mutants promote longevity through increased secretion of the polysaccharide colanic acid (CA), which regulates mitochondrial dynamics and unfolded protein response (UPRmt) in the host. Purified CA polymers are sufficient to promote longevity via ATFS-1, the host UPRmt-responsive transcription factor. Furthermore, the mitochondrial changes and longevity effects induced by CA are conserved across different species. Together, our results identified molecular targets for developing pro-longevity microbes and a bacterial metabolite acting on host mitochondria to promote longevity.
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Affiliation(s)
- Bing Han
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Priya Sivaramakrishnan
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Chih-Chun J Lin
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Isaiah A A Neve
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jingquan He
- Department of Integrative Biology and Pharmacology, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Li Wei Rachel Tay
- Department of Integrative Biology and Pharmacology, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Jessica N Sowa
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Antons Sizovs
- Department of Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Guangwei Du
- Department of Integrative Biology and Pharmacology, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Jin Wang
- Department of Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Christophe Herman
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Meng C Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA.
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28
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Ancell H, Pires-daSilva A. Sex-specific lifespan and its evolution in nematodes. Semin Cell Dev Biol 2017; 70:122-129. [PMID: 28554570 DOI: 10.1016/j.semcdb.2017.05.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 05/03/2017] [Accepted: 05/18/2017] [Indexed: 12/22/2022]
Abstract
Differences between sexes of the same species in lifespan and aging rate are widespread. While the proximal and evolutionary causes of aging are well researched, the factors that contribute to sex differences in these traits have been less studied. The striking diversity of nematodes provides ample opportunity to study variation in sex-specific lifespan patterns associated with shifts in life history and mating strategy. Although the plasticity of these sex differences will make it challenging to generalize from invertebrate to vertebrate systems, studies in nematodes have enabled empirical evaluation of predictions regarding the evolution of lifespan. These studies have highlighted how natural and sexual selection can generate divergent patterns of lifespan if the sexes are subject to different rates or sources of mortality, or if trade-offs between complex traits and longevity are resolved differently in each sex. Here, we integrate evidence derived mainly from nematodes that addresses the molecular and evolutionary basis of sex-specific aging and lifespan. Ultimately, we hope to generate a clearer picture of current knowledge in this area, and also highlight the limitations of our understanding.
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Affiliation(s)
- Henry Ancell
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
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29
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de la Guardia Y, Gilliat AF, Hellberg J, Rennert P, Cabreiro F, Gems D. Run-on of germline apoptosis promotes gonad senescence in C. elegans. Oncotarget 2016; 7:39082-39096. [PMID: 27256978 PMCID: PMC5129915 DOI: 10.18632/oncotarget.9681] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 05/14/2016] [Indexed: 02/07/2023] Open
Abstract
Aging (senescence) includes causal mechanisms (etiologies) of late-life disease, which remain poorly understood. According to the recently proposed hyperfunction theory, based on the older theory of antagonistic pleiotropy, senescent pathologies can arise from futile, post-reproductive run-on of processes that in early life promote fitness. Here we apply this idea to investigate the etiology of senescent pathologies in the reproductive system of Caenorhabditis elegans hermaphrodites, particularly distal gonad degeneration and disintegration. Hermaphrodite germ cells frequently undergo "physiological" (non-damage-induced) apoptosis (PA) to provision growing oocytes. Run-on of such PA is a potential cause of age-related gonad degeneration. We document the continuation of germline apoptosis in later life, and report that genetically blocking or increasing PA retards or accelerates degeneration, respectively. In wild-type males, which lack germ line apoptosis, gonad disintegration does not occur. However, mutational induction of PA in males does not lead to gonad disintegration. These results suggest that as germ-cell proliferation rate declines markedly in aging hermaphrodites (but not males), run-on of PA becomes a pathogenic mechanism that promotes gonad degeneration. This illustrates how hyperfunction, or non-adaptive run-on in later life of a process that promotes fitness in early life, can promote atrophic senescent pathology in C. elegans.
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Affiliation(s)
- Yila de la Guardia
- Institute of Healthy Ageing, and Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Ann F. Gilliat
- Institute of Healthy Ageing, and Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Josephine Hellberg
- Institute of Healthy Ageing, and Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Peter Rennert
- Institute of Healthy Ageing, and Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Filipe Cabreiro
- Department of Structural and Molecular Biology, University College London, London, UK
| | - David Gems
- Institute of Healthy Ageing, and Department of Genetics, Evolution and Environment, University College London, London, UK
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30
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Zimmerman SM, Hinkson IV, Elias JE, Kim SK. Reproductive Aging Drives Protein Accumulation in the Uterus and Limits Lifespan in C. elegans. PLoS Genet 2015; 11:e1005725. [PMID: 26656270 PMCID: PMC4676719 DOI: 10.1371/journal.pgen.1005725] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 11/13/2015] [Indexed: 11/26/2022] Open
Abstract
Aging in Caenorhabditis elegans is characterized by widespread physiological and molecular changes, but the mechanisms that determine the rate at which these changes occur are not well understood. In this study, we identify a novel link between reproductive aging and somatic aging in C. elegans. By measuring global age-related changes in the proteome, we identify a previously uncharacterized group of secreted proteins in the adult uterus that dramatically increase in abundance with age. This accumulation is blunted in animals with an extended reproductive period and accelerated in sterile animals lacking a germline. Uterine proteins are not removed in old post-reproductive animals or in young vulvaless worms, indicating that egg-laying is necessary for their rapid removal in wild-type young animals. Together, these results suggest that age-induced infertility contributes to extracellular protein accumulation in the uterus with age. Finally, we show that knocking down multiple age-increased proteins simultaneously extends lifespan. These results provide a mechanistic example of how the cessation of reproduction contributes to detrimental changes in the soma, and demonstrate how the timing of reproductive decline can influence the rate of aging. To understand the process of aging at the molecular level in C. elegans, we measured changes in protein abundance with age, determined whether these age-related protein changes lead to dysfunction in old animals, and have elucidated one of the upstream pathways responsible for these aging changes. We found that egg-laying in young worms permits removal of a novel class of proteins present in the uterus. When the reproductive period ends, the removal of uterine proteins stops, causing them to accumulate to toxic levels. This shows that the timing of reproductive decline influences the rate of somatic aging. The concept that the reproductive period has a direct role in specifying the rate of aging of the soma likely applies to other species as well.
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Affiliation(s)
- Stephanie M. Zimmerman
- Department of Genetics, Stanford University, Stanford, California, United States of America
| | - Izumi V. Hinkson
- Department of Chemical and Systems Biology, Stanford University, Stanford, California, United States of America
| | - Joshua E. Elias
- Department of Chemical and Systems Biology, Stanford University, Stanford, California, United States of America
| | - Stuart K. Kim
- Department of Genetics, Stanford University, Stanford, California, United States of America
- Department of Developmental Biology, Stanford University, Stanford, California, United States of America
- * E-mail:
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31
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Yun J, Glaser V. Interview with Joon Yun, MD. Rejuvenation Res 2015; 18:277-81. [PMID: 26076333 DOI: 10.1089/rej.2015.1721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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32
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Affiliation(s)
- Sandeep Kumar
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Zuzana Kocsisova
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Kerry Kornfeld
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- * E-mail:
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