1
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Falah G, Sharvit L, Atzmon G. CRISPR-Cas9 mediated d3GHR knockout in HEK293 cells: Revealing the longevity associated isoform stress resilience. Exp Gerontol 2024; 196:112586. [PMID: 39303817 DOI: 10.1016/j.exger.2024.112586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 09/16/2024] [Accepted: 09/17/2024] [Indexed: 09/22/2024]
Abstract
The Growth Hormone Receptor (GHR) gene encodes a protein that is essential for mediating the biological effects of growth hormone (GH). A series of molecular events are set off when GH binds to its receptor, resulting in a variety of physiological reactions linked to development, growth, and metabolism. Recently a particular genetic variation, within the GHR gene that is labeled as the "d3GHR," which lacks exon 3 was associated with longevity. This specific deletion isoform was connected to changes in the structure of the GHR protein, which may have an impact on the GHR's function. To test in vitro the advantage of the d3 carrier that may link to longevity, we employed the CRISPR/Cas9 technique to produce two isoforms: the homozygotes isoform (d3/d3) and the heterozygotes isoform (d3/fl) using HEK293 cell line. The CRISPR editing effectiveness was >85 %, indicating that we had successfully built the Cas9-gRNA complex that is appropriate for the GHR gene. The viability of the resulted isoform cells was examined under three environmental stressors that mimic some aging processes. In addition, we examined the GHR signaling pathway by selecting potential downstream genes in the GHR signaling cascade. The results show that heterozygotes cells demonstrated higher survival rates under UV radiation compared with the WT cells (87 % compared with 67 % for the WT cells when exposed to 2 min of UV radiation), and in fasting conditions, the d3GHR cells showed a 15 % greater viability than the WT cells. Moreover, the baseline expression levels (without intervention) of the IGF1 and JAK/STAT genes signaling pathways significantly declined in the homozygotes cells compared with the WT (p < 0.05). This noteworthy finding might offer a practical approach to test illness prevention and give the scientific community critical new insights on mechanism associated with lifespan.
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Affiliation(s)
- Ghadeer Falah
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Haifa, Israel
| | - Lital Sharvit
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Haifa, Israel
| | - Gil Atzmon
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Haifa, Israel; Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, NY, USA.
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2
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Huang Y, Wang Y, Deng J, Gao S, Qiu J, He J, Yang T, Tan N, Cheng S, Song Z. Research on the anti-oxidant and anti-aging effects of Polygonatum kingianum saponins in Caenorhabditis elegans. Heliyon 2024; 10:e35556. [PMID: 39170193 PMCID: PMC11336756 DOI: 10.1016/j.heliyon.2024.e35556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 07/30/2024] [Accepted: 07/31/2024] [Indexed: 08/23/2024] Open
Abstract
Oxidative stress and its impact on aging are critical areas of research. Natural anti-oxidants, such as saponins found in Polygonatum sibiricum, hold promise as potential clinical interventions against aging. In this study, we utilized the nematode model organism, Caenorhabditis elegans, to investigate the pharmacological effects of Polygonatum sibiricum saponins (PKS) on antioxidation and anti-aging. The results demonstrated a significant anti-aging biological activity associated with PKS. Through experiments involving lifespan and stress, lipofuscin, q-PCR, and ROS measurement, we found that PKS effectively mitigated aging-related processes. Furthermore, the mechanism underlying these anti-aging effects was linked to the SKN-1 signaling pathway. PKS increased the nuclear localization of the SKN-1 transcription factor, leading to the up-regulation of downstream anti-oxidant genes, such as gst-4 and sod-3, and a substantial reduction in intracellular ROS levels within the nematode. In conclusion, our study sheds light on the anti-oxidant and anti-aging properties of PKS in C. elegans. This research not only contributes to understanding the biological mechanisms involved but also highlights the potential therapeutic applications of these natural compounds in combating aging-related processes.
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Affiliation(s)
- Yaqi Huang
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Yetong Wang
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Jia Deng
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Sijie Gao
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Jiakang Qiu
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Jiawei He
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Tong Yang
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Nianhua Tan
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Shaowu Cheng
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Zhenyan Song
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
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3
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Zhang Z, Li J, Li F, Wang T, Luo X, Li B, You Y, Wu C, Liu X. Jujubae Fructus extract prolongs lifespan and improves stress tolerance in Caenorhabditis elegans dependent on DAF-16/SOD-3. Sci Rep 2024; 14:13713. [PMID: 38877105 PMCID: PMC11178930 DOI: 10.1038/s41598-024-64045-0] [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: 02/02/2024] [Accepted: 06/04/2024] [Indexed: 06/16/2024] Open
Abstract
Jujubae Fructus, the fruit of Ziziphus jujuba Mill has been used as one of the medicine food homology species for thousands of years in China. Studies have shown that the active ingredients of Jujubae Fructus have a variety of biological effects, but its role in the aging process still lacks knowledge. Here, we investigated the effect of Jujubae Fructus extract (JE) on Caenorhabditis elegans lifespan and its potential mechanism. The lifespan of C. elegans treated with JE was signifificantly increased in a dose-dependent manner. In addition, JE treatment prolonged the reproductive period and increased normal activity during aging in C. elegans. Similarly, JE supplementation also enhanced the resistance to heat and oxidative stress in C. elegans. Furthermore, the mutant worms' lifespan assays demonstrated that JE requires daf-16 to prolong lifespan. DAF-16::GFP analysis of TJ356 showed that JE treatment translocates DAF-16::GFP to nucleus in transgenic worms. By analyzing the downstream of daf-16, we identify that JE may regulate sod3 downstream of daf-16. Mutant worms' lifespan and transgenic reporter gene expression assays revealed that increasing SOD-3 expression was critical for extending longevity in C. elegans with JE therapy. Collectively, these data indicate that JE may have an important role in C. elegans longevity that is dependent on DAF-16 and SOD-3.
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Affiliation(s)
- Zhi Zhang
- Department of Nutrition and Food Hygiene, College of Public Health, Xinxiang Medical University, 601 Jinsui Avenue, Xinxiang City, Henan Province, China
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jiajia Li
- Institute of Translational Medicine, Zhoukou Normal University, No.6, Middle Wenchang Avenue, Chuanhui District, Zhoukou, China
| | - Feng Li
- Department of Nutrition and Food Hygiene, College of Public Health, Xinxiang Medical University, 601 Jinsui Avenue, Xinxiang City, Henan Province, China
- Institute of Translational Medicine, Zhoukou Normal University, No.6, Middle Wenchang Avenue, Chuanhui District, Zhoukou, China
| | - Tao Wang
- Institute of Translational Medicine, Zhoukou Normal University, No.6, Middle Wenchang Avenue, Chuanhui District, Zhoukou, China
| | - Xiaoyan Luo
- Department of Nutrition and Food Hygiene, College of Public Health, Xinxiang Medical University, 601 Jinsui Avenue, Xinxiang City, Henan Province, China
| | - Bing Li
- Institute of Translational Medicine, Zhoukou Normal University, No.6, Middle Wenchang Avenue, Chuanhui District, Zhoukou, China
| | - Yilin You
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural University, Beijing, China
| | - Changjing Wu
- Institute of Translational Medicine, Zhoukou Normal University, No.6, Middle Wenchang Avenue, Chuanhui District, Zhoukou, China.
| | - Xiaomeng Liu
- Department of Nutrition and Food Hygiene, College of Public Health, Xinxiang Medical University, 601 Jinsui Avenue, Xinxiang City, Henan Province, China.
- Institute of Translational Medicine, Zhoukou Normal University, No.6, Middle Wenchang Avenue, Chuanhui District, Zhoukou, China.
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4
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Šetinc M, Celinšćak Ž, Bočkor L, Zajc Petranović M, Stojanović Marković A, Peričić Salihović M, Deelen J, Škarić-Jurić T. The role of longevity-related genetic variant interactions as predictors of survival after 85 years of age. Mech Ageing Dev 2024; 219:111926. [PMID: 38484896 PMCID: PMC11166054 DOI: 10.1016/j.mad.2024.111926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/27/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024]
Abstract
Genome-wide association studies and candidate gene studies have identified several genetic variants that might play a role in achieving longevity. This study investigates interactions between pairs of those single nucleotide polymorphisms (SNPs) and their effect on survival above the age of 85 in a sample of 327 Croatian individuals. Although none of the SNPs individually showed a significant effect on survival in this sample, 14 of the 359 interactions tested (between SNPs not in LD) reached the level of nominal significance (p<0.05), showing a potential effect on late-life survival. Notably, SH2B3 rs3184504 interacted with different SNPs near TERC, TP53 rs1042522 with different SNPs located near the CDKN2B gene, and CDKN2B rs1333049 with different SNPs in FOXO3, as well as with LINC02227 rs2149954. The other interaction pairs with a possible effect on survival were FOXO3 rs2802292 and ERCC2 rs50871, IL6 rs1800795 and GHRHR rs2267723, LINC02227 rs2149954 and PARK7 rs225119, as well as PARK7 rs225119 and PTPN1 rs6067484. These interactions remained significant when tested together with a set of health-related variables that also had a significant effect on survival above 85 years. In conclusion, our results confirm the central role of genetic regulation of insulin signalling and cell cycle control in longevity.
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Affiliation(s)
- Maja Šetinc
- Institute for Anthropological Research, Zagreb 10000, Croatia; Centre for Applied Bioanthropology, Institute for Anthropological Research, Zagreb 10000, Croatia.
| | | | - Luka Bočkor
- Institute for Anthropological Research, Zagreb 10000, Croatia; Centre for Applied Bioanthropology, Institute for Anthropological Research, Zagreb 10000, Croatia
| | | | | | | | - Joris Deelen
- Max Planck Institute for Biology of Ageing, Cologne 50931, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany.
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5
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Kuo-Esser L, Chen R, Lawson K, Kuchinski K, Simmons N, Dominguez M, Scandura T, Vo M, Dasenbrock-Gammon E, Hagan N, Esposito H, Thompson M, Le S, Escorcia W, Wetzel HN. Early-life caffeine exposure induces morphological changes and altered physiology in Caenorhabditiselegans. Biochem Biophys Res Commun 2024; 690:149240. [PMID: 37988878 DOI: 10.1016/j.bbrc.2023.149240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 11/09/2023] [Indexed: 11/23/2023]
Abstract
Caffeine, a widely consumed stimulant, is known for its effects on alertness and fatigue reduction by blockade of adenosine receptors. While it holds therapeutic potential, its diverse impacts pose risks, particularly in early development. This study explores the developmental effects of caffeine exposure using Caenorhabditis elegans (C. elegans) as a model organism. We investigated morphological and behavioral changes induced by caffeine exposure at the L1 stage and assessed their impact at the L4 stage, which roughly corresponds to human infancy and adolescence, respectively. Caffeine-exposed worms displayed increased body length, body bends, and pharyngeal pumping rates compared to control worms. These findings indicate heightened food-seeking behavior and greater food intake, leading to the observed morphological changes. While caffeine did not affect other locomotor behaviors, its stimulatory effect on growth and development highlights its significance. This study provides insights into the potential impact of early-life caffeine exposure on long-term health and development, offering a foundation for future research in vertebrates to uncover its implications on metabolism and other metrics of health.
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Affiliation(s)
- Lance Kuo-Esser
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | - Ramon Chen
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | - Kylie Lawson
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | | | - Nijah Simmons
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | | | - Tommy Scandura
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | - Martin Vo
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA; Lake Erie College of Osteopathic Medicine, Lake Erie, Pennsylvania, 16509, USA
| | - Emma Dasenbrock-Gammon
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA; University of Kentucky College of Medicine, Highland Heights, Kentucky, 41099, USA
| | - Natalie Hagan
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA; University of Kentucky College of Medicine, Highland Heights, Kentucky, 41099, USA
| | - Haley Esposito
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | - Molly Thompson
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | - Steven Le
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA
| | - Wilber Escorcia
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA.
| | - Hanna N Wetzel
- Biology Department, Xavier University, Cincinnati, OH, 45207, USA.
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6
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Huang Y, Ge MX, Li YH, Li JL, Yu Q, Xiao FH, Ao HS, Yang LQ, Li J, He Y, Kong QP. Longevity-Associated Transcription Factor ATF7 Promotes Healthspan by Suppressing Cellular Senescence and Systematic Inflammation. Aging Dis 2023:AD.2022.1217. [PMID: 37163432 PMCID: PMC10389835 DOI: 10.14336/ad.2022.1217] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/17/2022] [Indexed: 05/12/2023] Open
Abstract
Aging is characterized by persistent low-grade systematic inflammation, which is largely responsible for the occurrence of various age-associated diseases. We and others have previously reported that long-lived people (such as centenarians) can delay the onset of or even escape certain major age-related diseases. Here, by screening blood transcriptome and inflammatory profiles, we found that long-lived individuals had a relatively lower inflammation level (IL6, TNFα), accompanied by up-regulation of activating transcription factor 7 (ATF7). Interestingly, ATF7 expression was gradually reduced during cellular senescence. Loss of ATF7 induced cellular senescence, while overexpression delayed senescence progress and senescence-associated secretory phenotype (SASP) secretion. We showed that the anti-senescence effects of ATF7 were achieved by inhibiting nuclear factor kappa B (NF-κB) signaling and increasing histone H3K9 dimethylation (H3K9me2). In Caenorhabditis elegans, ATF7 overexpression significantly suppressed aging biomarkers and extended lifespan. Our findings suggest that ATF7 is a longevity-promoting factor that lowers cellular senescence and inflammation in long-lived individuals.
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Affiliation(s)
- Yaqun Huang
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Department of Dermatology/National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410000, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China
| | - Ming-Xia Ge
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Yu-Hong Li
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Jing-Lin Li
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Department of Dermatology/National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410000, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China
| | - Qin Yu
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Fu-Hui Xiao
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Hong-Shun Ao
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Li-Qin Yang
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Ji Li
- Department of Dermatology/National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410000, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China
| | - Yonghan He
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Qing-Peng Kong
- State Key Laboratory of Genetic Resources and Evolution, Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Key Laboratory of Healthy Aging Study, KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- CAS Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China
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7
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Flowers S, Kothari R, Torres Cleuren YN, Alcorn MR, Ewe CK, Alok G, Fiallo SL, Joshi PM, Rothman JH. Regulation of defective mitochondrial DNA accumulation and transmission in C. elegans by the programmed cell death and aging pathways. eLife 2023; 12:e79725. [PMID: 37782016 PMCID: PMC10545429 DOI: 10.7554/elife.79725] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 09/15/2023] [Indexed: 10/03/2023] Open
Abstract
The heteroplasmic state of eukaryotic cells allows for cryptic accumulation of defective mitochondrial genomes (mtDNA). 'Purifying selection' mechanisms operate to remove such dysfunctional mtDNAs. We found that activators of programmed cell death (PCD), including the CED-3 and CSP-1 caspases, the BH3-only protein CED-13, and PCD corpse engulfment factors, are required in C. elegans to attenuate germline abundance of a 3.1-kb mtDNA deletion mutation, uaDf5, which is normally stably maintained in heteroplasmy with wildtype mtDNA. In contrast, removal of CED-4/Apaf1 or a mutation in the CED-4-interacting prodomain of CED-3, do not increase accumulation of the defective mtDNA, suggesting induction of a non-canonical germline PCD mechanism or non-apoptotic action of the CED-13/caspase axis. We also found that the abundance of germline mtDNAuaDf5 reproducibly increases with age of the mothers. This effect is transmitted to the offspring of mothers, with only partial intergenerational removal of the defective mtDNA. In mutants with elevated mtDNAuaDf5 levels, this removal is enhanced in older mothers, suggesting an age-dependent mechanism of mtDNA quality control. Indeed, we found that both steady-state and age-dependent accumulation rates of uaDf5 are markedly decreased in long-lived, and increased in short-lived, mutants. These findings reveal that regulators of both PCD and the aging program are required for germline mtDNA quality control and its intergenerational transmission.
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Affiliation(s)
- Sagen Flowers
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Rushali Kothari
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Yamila N Torres Cleuren
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
- Computational Biology Unit, Institute for Informatics, University of BergenBergenNorway
| | - Melissa R Alcorn
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Chee Kiang Ewe
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Geneva Alok
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Samantha L Fiallo
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Pradeep M Joshi
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Joel H Rothman
- Department of MCD Biology and Neuroscience Research Institute, University of California, Santa BarbaraSanta BarbaraUnited States
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8
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Santos J, Matos M, Flatt T, Chelo IM. Microbes are potential key players in the evolution of life histories and aging in Caenorhabditis elegans. Ecol Evol 2023; 13:e10537. [PMID: 37753311 PMCID: PMC10518755 DOI: 10.1002/ece3.10537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/07/2023] [Accepted: 09/01/2023] [Indexed: 09/28/2023] Open
Abstract
Microbes can have profound effects on host fitness and health and the appearance of late-onset diseases. Host-microbe interactions thus represent a major environmental context for healthy aging of the host and might also mediate trade-offs between life-history traits in the evolution of host senescence. Here, we have used the nematode Caenorhabditis elegans to study how host-microbe interactions may modulate the evolution of life histories and aging. We first characterized the effects of two non-pathogenic and one pathogenic Escherichia coli strains, together with the pathogenic Serratia marcescens DB11 strain, on population growth rates and survival of C. elegans from five different genetic backgrounds. We then focused on an outbred C. elegans population, to understand if microbe-specific effects on the reproductive schedule and in traits such as developmental rate and survival were also expressed in the presence of males and standing genetic variation, which could be relevant for the evolution of C. elegans and other nematode species in nature. Our results show that host-microbe interactions have a substantial host-genotype-dependent impact on the reproductive aging and survival of the nematode host. Although both pathogenic bacteria reduced host survival in comparison with benign strains, they differed in how they affected other host traits. Host fertility and population growth rate were affected by S. marcescens DB11 only during early adulthood, whereas this occurred at later ages with the pathogenic E. coli IAI1. In both cases, these effects were largely dependent on the host genotypes. Given such microbe-specific genotypic differences in host life history, we predict that the evolution of reproductive schedules and senescence might be critically contingent on host-microbe interactions in nature.
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Affiliation(s)
- Josiane Santos
- cE3c – Centre for Ecology, Evolution and Environmental Changes & CHANGE – Global Change and Sustainability InstituteLisboaPortugal
- Departamento de Biologia Animal, Faculdade de CiênciasUniversidade de LisboaLisboaPortugal
| | - Margarida Matos
- cE3c – Centre for Ecology, Evolution and Environmental Changes & CHANGE – Global Change and Sustainability InstituteLisboaPortugal
- Departamento de Biologia Animal, Faculdade de CiênciasUniversidade de LisboaLisboaPortugal
| | - Thomas Flatt
- Department of BiologyUniversity of FribourgFribourgSwitzerland
| | - Ivo M. Chelo
- cE3c – Centre for Ecology, Evolution and Environmental Changes & CHANGE – Global Change and Sustainability InstituteLisboaPortugal
- Departamento de Biologia Animal, Faculdade de CiênciasUniversidade de LisboaLisboaPortugal
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9
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Matai L, Stathis T, Lee JD, Parsons C, Saxena T, Shlomchik K, Slack FJ. The conserved microRNA-229 family controls low-insulin signaling and dietary restriction induced longevity through interactions with SKN-1/NRF2. Aging Cell 2023; 22:e13785. [PMID: 36748780 PMCID: PMC10086521 DOI: 10.1111/acel.13785] [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: 02/15/2022] [Revised: 12/12/2022] [Accepted: 01/05/2023] [Indexed: 02/08/2023] Open
Abstract
Several microRNAs have emerged as regulators of pathways that control aging. For example, miR-228 is required for normal lifespan and dietary restriction (DR) mediated longevity through interaction with PHA-4 and SKN-1 transcription factors in Caenorhabditis elegans. miR-229,64,65, and 66, a cluster of microRNAs located adjacent to each other on chromosome III, are in the same family as miR-228, albeit with slight differences in the miR-228 seed sequence. We demonstrate that, in contrast to the anti-longevity role of miR-228, the miR-229-66 cluster is required for normal C. elegans lifespan and for the longevity observed in mir-228 mutants. miR-229-66 is also critical for lifespan extension observed under DR and reduced insulin signaling (IIS) and by constitutive nuclear SKN-1. Both DR and low-IIS upregulate the expression of the miRNA cluster, which is dependent on transcription factors PHA-4, SKN-1, and DAF-16. In turn, the expression of SKN-1 and DAF-16 requires mir-229,64,65,66. miR-229-66 targets the odd-skipped-related transcription factor, odd-2 to regulate lifespan. Knockdown of odd-2 increases lifespan, suppresses the short lifespan of mir-229,64,65,66(nDf63) III mutants, and alters levels of SKN-1 in the ASI neurons. Together with SKN-1, the miRNA cluster also indirectly regulates several genes in the xenobiotic detoxification pathway which increases wild-type lifespan and significantly rescues the short lifespan of mir-229,64,65,66(nDf63) III mutants. Thus, by interacting with SKN-1, miR-229-66 transduces the effects of DR and low-IIS in lifespan extension in C. elegans. Given that this pathway is conserved, it is possible that a similar mechanism regulates aging in more complex organisms.
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Affiliation(s)
- Latika Matai
- HMS Initiative for RNA Medicine, Department of PathologyBeth Israel Deaconess Medical Center, Harvard Medical SchoolBostonMassachusettsUSA
| | - Thalyana Stathis
- Department of Molecular, Cellular and Developmental BiologyYale UniversityNew HavenConnecticutUSA
| | - Jonathan D. Lee
- HMS Initiative for RNA Medicine, Department of PathologyBeth Israel Deaconess Medical Center, Harvard Medical SchoolBostonMassachusettsUSA
| | - Christine Parsons
- Department of Molecular, Cellular and Developmental BiologyYale UniversityNew HavenConnecticutUSA
| | - Tanvi Saxena
- HMS Initiative for RNA Medicine, Department of PathologyBeth Israel Deaconess Medical Center, Harvard Medical SchoolBostonMassachusettsUSA
| | - Kovi Shlomchik
- Department of Molecular, Cellular and Developmental BiologyYale UniversityNew HavenConnecticutUSA
| | - Frank J. Slack
- HMS Initiative for RNA Medicine, Department of PathologyBeth Israel Deaconess Medical Center, Harvard Medical SchoolBostonMassachusettsUSA
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10
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Tyczewska A, Rzepczak A, Sobańska D, Grzywacz K. The emerging roles of tRNAs and tRNA-derived fragments during aging: Lessons from studies on model organisms. Ageing Res Rev 2023; 85:101863. [PMID: 36707034 DOI: 10.1016/j.arr.2023.101863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/26/2023]
Abstract
Aging is a gradual decline of various functions of organisms resulting in diminished abilities to protect against the environmental damage and reinforce the physiological harmony. Age-related functional declines have been thought to be passive and not regulated. However, studies on numerous model organisms, from yeast to mammals, exposed that the mechanisms of lifespan regulation are remarkably conserved throughout the evolution. Following the pioneering genetic studies in C. elegans, it has been shown that the genes related to the longevity are conserved in yeast, flies and mice. For a long time, tRNAs have been only considered as molecules transporting amino acids to the ribosome during translation. Nonetheless, it has become apparent from many biological studies that tRNAs are entangled in a variety of physiological and pathological processes. This review focuses on the emerging roles of tRNA-associated processes in aging and lifespan of model organisms. More specificaly, we present a summary on the importance of tRNA metabolism, epitranscriptome and possible roles of tRNA-derived fragments in aging and lifespan regulation. Better understanding of the basic mechanisms of aging could lead to the development of new diagnostics and treatments for aging-related diseases.
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Affiliation(s)
- Agata Tyczewska
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | - Alicja Rzepczak
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | - Daria Sobańska
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | - Kamilla Grzywacz
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland.
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11
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Zhang G, Liu H, Xue T, Kong X, Tian D, Luo L, Yang Y, Xu K, Wei Y, Zhuang Z. Ribavirin extends the lifespan of Caenorhabditis elegans through AMPK-TOR Signaling. Eur J Pharmacol 2023; 946:175548. [PMID: 36706801 DOI: 10.1016/j.ejphar.2023.175548] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 01/26/2023]
Abstract
Aging is a process accompanied by widespread degenerative changes which are a major cause of human disease and disability. One goal of aging research is to develop interventions or drugs that can extend organism lifespan and treat age-related diseases. Here, we report the identification of a broad spectrum anti-viral agent, ribavirin, as a potential pharmacological aging intervention. Ribavirin extended the lifespan and healthspan of Caenorhabditis elegans by inhibiting Target of Rapamycin (TOR) signaling and activating AMP-activated protein kinase (AMPK). Moreover, our data indicate that ribavirin activated AMPK by reducing the levels of adenosine triphosphate (ATP) and lysosomal v-ATPase-Ragulator-AXIN Complex. Thus, our studies successfully identify ribavirin as a potential anti-aging drug, and indicate that its anti-aging effect is mediated via AMPK-TOR signaling.
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Affiliation(s)
- Ganlan Zhang
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou, 213164, China
| | - Hui Liu
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou, 213164, China
| | - Ting Xue
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou, 213164, China
| | - Xiangming Kong
- Changzhou Railway Higher Vocational and Technical School, Changzhou, 213011, China
| | - Dongmei Tian
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou, 213164, China
| | - Libo Luo
- Changzhou Traditional Chinese Medicine Hospital, Changzhou, 213004, China
| | - Yanhua Yang
- Changzhou No.7 People's Hospital, Changzhou, 213011, China
| | - Keqing Xu
- Changzhou No.7 People's Hospital, Changzhou, 213011, China
| | - Youheng Wei
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, 225009, China
| | - Ziheng Zhuang
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou, 213164, China; Changzhou Traditional Chinese Medicine Hospital, Changzhou, 213004, China.
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12
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Wang C, Long Y, Wang B, Zhang C, Ma DK. GPCR signaling regulates severe stress-induced organismic death in Caenorhabditis elegans. Aging Cell 2023; 22:e13735. [PMID: 36415159 PMCID: PMC9835589 DOI: 10.1111/acel.13735] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 11/24/2022] Open
Abstract
How an organism dies is a fundamental yet poorly understood question in biology. An organism can die of many causes, including stress-induced phenoptosis, also defined as organismic death that is regulated by its genome-encoded programs. The mechanism of stress-induced phenoptosis is still largely unknown. Here, we show that transient but severe freezing-thaw stress (FTS) in Caenorhabditis elegans induces rapid and robust phenoptosis that is regulated by G-protein coupled receptor (GPCR) signaling. RNAi screens identify the GPCR-encoding fshr-1 in mediating transcriptional responses to FTS. FSHR-1 increases ligand interaction upon FTS and activates a cyclic AMP-PKA cascade leading to a genetic program to promote organismic death under severe stress. FSHR-1/GPCR signaling up-regulates the bZIP-type transcription factor ZIP-10, linking FTS to expression of genes involved in lipid remodeling, proteostasis, and aging. A mathematical model suggests how genes may promote organismic death under severe stress conditions, potentially benefiting growth of the clonal population with individuals less stressed and more reproductively privileged. Our studies reveal the roles of FSHR-1/GPCR-mediated signaling in stress-induced gene expression and phenoptosis in C. elegans, providing empirical new insights into mechanisms of stress-induced phenoptosis with evolutionary implications.
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Affiliation(s)
- Changnan Wang
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
- Cardiovascular Research Institute and Department of PhysiologyUniversity of California San FranciscoSan FranciscoCaliforniaUSA
| | - Yong Long
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of Hydrobiology, Chinese Academy of SciencesWuhanChina
| | - Bingying Wang
- Cardiovascular Research Institute and Department of PhysiologyUniversity of California San FranciscoSan FranciscoCaliforniaUSA
| | - Chao Zhang
- Department of Plastic and Reconstructive SurgeryShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Dengke K. Ma
- Cardiovascular Research Institute and Department of PhysiologyUniversity of California San FranciscoSan FranciscoCaliforniaUSA
- Innovative Genomics InstituteUniversity of CaliforniaBerkeleyCaliforniaUSA
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13
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Synthesis, characterization, in vitro cytotoxicity of novel metallo phthalocyanines with four methylpropiophenonyl clusters and their effects on Caenorhabditis elegans thermotolerance. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02415-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Ham S, Kim SS, Park S, Kim EJE, Kwon S, Park HEH, Jung Y, Lee SJV. Systematic transcriptome analysis associated with physiological and chronological aging in Caenorhabditis elegans. Genome Res 2022; 32:2003-2014. [PMID: 36351769 PMCID: PMC9808617 DOI: 10.1101/gr.276515.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 10/19/2022] [Indexed: 11/11/2022]
Abstract
Aging is associated with changes in a variety of biological processes at the transcriptomic level, including gene expression. Two types of aging occur during a lifetime: chronological and physiological aging. However, dissecting the difference between chronological and physiological ages at the transcriptomic level has been a challenge because of its complexity. We analyzed the transcriptomic features associated with physiological and chronological aging using Caenorhabditis elegans as a model. Many structural and functional transcript elements, such as noncoding RNAs and intron-derived transcripts, were up-regulated with chronological aging. In contrast, mRNAs with many biological functions, including RNA processing, were down-regulated with physiological aging. We also identified an age-dependent increase in the usage of distal 3' splice sites in mRNA transcripts as a biomarker of physiological aging. Our study provides crucial information for dissecting chronological and physiological aging at the transcriptomic level.
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Affiliation(s)
- Seokjin Ham
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Sieun S Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Sangsoon Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Eun Ji E Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Sujeong Kwon
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Hae-Eun H Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Yoonji Jung
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
| | - Seung-Jae V Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
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15
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SIN-3 functions through multi-protein interaction to regulate apoptosis, autophagy, and longevity in Caenorhabditis elegans. Sci Rep 2022; 12:10560. [PMID: 35732652 PMCID: PMC9217932 DOI: 10.1038/s41598-022-13864-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/09/2022] [Indexed: 11/08/2022] Open
Abstract
SIN3/HDAC is a multi-protein complex that acts as a regulatory unit and functions as a co-repressor/co-activator and a general transcription factor. SIN3 acts as a scaffold in the complex, binding directly to HDAC1/2 and other proteins and plays crucial roles in regulating apoptosis, differentiation, cell proliferation, development, and cell cycle. However, its exact mechanism of action remains elusive. Using the Caenorhabditis elegans (C. elegans) model, we can surpass the challenges posed by the functional redundancy of SIN3 isoforms. In this regard, we have previously demonstrated the role of SIN-3 in uncoupling autophagy and longevity in C. elegans. In order to understand the mechanism of action of SIN3 in these processes, we carried out a comparative analysis of the SIN3 protein interactome from model organisms of different phyla. We identified conserved, expanded, and contracted gene classes. The C. elegans SIN-3 interactome -revealed the presence of well-known proteins, such as DAF-16, SIR-2.1, SGK-1, and AKT-1/2, involved in autophagy, apoptosis, and longevity. Overall, our analyses propose potential mechanisms by which SIN3 participates in multiple biological processes and their conservation across species and identifies candidate genes for further experimental analysis.
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16
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Transcriptome Analysis of Insulin Signaling-Associated Transcription Factors in C. elegans Reveal Their Genome-Wide Target Genes Specificity and Complexity. Int J Mol Sci 2021; 22:ijms222212462. [PMID: 34830338 PMCID: PMC8618238 DOI: 10.3390/ijms222212462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 11/24/2022] Open
Abstract
Insulin/IGF-1-like signaling (IIS) plays a crucial, conserved role in development, growth, reproduction, stress tolerance, and longevity. In Caenorhabditis elegans, the enhanced longevity under reduced insulin signaling (rIIS) is primarily regulated by the transcription factors (TFs) DAF-16/FOXO, SKN-1/Nrf-1, and HSF1/HSF-1. The specific and coordinated regulation of gene expression by these TFs under rIIS has not been comprehensively elucidated. Here, using RNA-sequencing analysis, we report a systematic study of the complexity of TF-dependent target gene interactions during rIIS under analogous genetic and experimental conditions. We found that DAF-16 regulates only a fraction of the C. elegans transcriptome but controls a large set of genes under rIIS; SKN-1 and HSF-1 show the opposite trend. Both of the latter TFs function as activators and repressors to a similar extent, while DAF-16 is predominantly an activator. For expression of the genes commonly regulated by TFs under rIIS conditions, DAF-16 is the principal determining factor, dominating over the other two TFs, irrespective of whether they activate or repress these genes. The functional annotations and regulatory networks presented in this study provide novel insights into the complexity of the gene regulatory networks downstream of the IIS pathway that controls diverse phenotypes, including longevity.
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17
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Park HEH, Hwang W, Ham S, Kim E, Altintas O, Park S, Son HG, Lee Y, Lee D, Heo WD, Lee SJV. A PTEN variant uncouples longevity from impaired fitness in Caenorhabditis elegans with reduced insulin/IGF-1 signaling. Nat Commun 2021; 12:5631. [PMID: 34561453 PMCID: PMC8463539 DOI: 10.1038/s41467-021-25920-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 08/24/2021] [Indexed: 01/04/2023] Open
Abstract
Insulin/IGF-1 signaling (IIS) regulates various physiological aspects in numerous species. In Caenorhabditis elegans, mutations in the daf-2/insulin/IGF-1 receptor dramatically increase lifespan and immunity, but generally impair motility, growth, and reproduction. Whether these pleiotropic effects can be dissociated at a specific step in insulin/IGF-1 signaling pathway remains unknown. Through performing a mutagenesis screen, we identified a missense mutation daf-18(yh1) that alters a cysteine to tyrosine in DAF-18/PTEN phosphatase, which maintained the long lifespan and enhanced immunity, while improving the reduced motility in adult daf-2 mutants. We showed that the daf-18(yh1) mutation decreased the lipid phosphatase activity of DAF-18/PTEN, while retaining a partial protein tyrosine phosphatase activity. We found that daf-18(yh1) maintained the partial activity of DAF-16/FOXO but restricted the detrimental upregulation of SKN-1/NRF2, contributing to beneficial physiological traits in daf-2 mutants. Our work provides important insights into how one evolutionarily conserved component, PTEN, can coordinate animal health and longevity.
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Affiliation(s)
- Hae-Eun H Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Wooseon Hwang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Seokjin Ham
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Eunah Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Ozlem Altintas
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Sangsoon Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Heehwa G Son
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Yujin Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Dongyeop Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Won Do Heo
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Seung-Jae V Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea.
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18
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Tataridas-Pallas N, Thompson MA, Howard A, Brown I, Ezcurra M, Wu Z, Silva IG, Saunter CD, Kuerten T, Weinkove D, Blackwell TK, Tullet JMA. Neuronal SKN-1B modulates nutritional signalling pathways and mitochondrial networks to control satiety. PLoS Genet 2021; 17:e1009358. [PMID: 33661901 PMCID: PMC7932105 DOI: 10.1371/journal.pgen.1009358] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 01/17/2021] [Indexed: 12/14/2022] Open
Abstract
The feeling of hunger or satiety results from integration of the sensory nervous system with other physiological and metabolic cues. This regulates food intake, maintains homeostasis and prevents disease. In C. elegans, chemosensory neurons sense food and relay information to the rest of the animal via hormones to control food-related behaviour and physiology. Here we identify a new component of this system, SKN-1B which acts as a central food-responsive node, ultimately controlling satiety and metabolic homeostasis. SKN-1B, an ortholog of mammalian NF-E2 related transcription factors (Nrfs), has previously been implicated with metabolism, respiration and the increased lifespan incurred by dietary restriction. Here we show that SKN-1B acts in two hypothalamus-like ASI neurons to sense food, communicate nutritional status to the organism, and control satiety and exploratory behaviours. This is achieved by SKN-1B modulating endocrine signalling pathways (IIS and TGF-β), and by promoting a robust mitochondrial network. Our data suggest a food-sensing and satiety role for mammalian Nrf proteins. Deciding when and how much to eat is important for maintaining health and preventing disease. It requires an intricate molecular level of communication between our nervous, physiological, and metabolic systems. These signals stimulate food intake, and afterwards the feeling of satiety which makes us stop eating. We have studied these phenomena using the simple nematode worm C. elegans which has a fully mapped nervous system and quantifiable food-related behaviours. In C. elegans, chemosensory neurons sense food and communicate this to the rest of the animal via hormones to control food-related behaviour and associated physiological changes. Here we identify a new central node of this system, the C. elegans gene SKN-1B, which acts in two sensory neurons to sense food, communicate food-status to the rest of the worm, and control satiety and exploratory behaviours. It does this by altering hormonal signalling (Insulin and Transforming Growth Factor-β), and by promoting a strong mitochondrial network. The mammalian equivalents of SKN-1B are the NF-E2 related transcription factors (Nrfs), which have previously been implicated with metabolism and respiration. Our data suggest a new food-sensing and satiety role for mammalian Nrf proteins.
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Affiliation(s)
| | | | - Alexander Howard
- School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - Ian Brown
- School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - Marina Ezcurra
- School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - Ziyun Wu
- Joslin Diabetes Center, One Joslin Place, Boston, Massachusetts, United States of America
| | | | | | - Timo Kuerten
- School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - David Weinkove
- Magnitude Biosciences Ltd, NETPark Plexus, Sedgefield, United Kingdom
| | - T. Keith Blackwell
- Joslin Diabetes Center, One Joslin Place, Boston, Massachusetts, United States of America
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19
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Liu D, Zeng X, Li L, Ou ZL. Carnitine promotes recovery from oxidative stress and extends lifespan in C. elegans. Aging (Albany NY) 2020; 13:813-830. [PMID: 33290254 PMCID: PMC7835055 DOI: 10.18632/aging.202187] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/05/2020] [Indexed: 11/30/2022]
Abstract
Carnitine is required for transporting fatty acids into the mitochondria for β-oxidation. Carnitine has been used as an energy supplement but the roles in improving health and delaying aging remain unclear. Here we show in C. elegans that L-carnitine improves recovery from oxidative stress and extends lifespan. L-carnitine promotes recovery from oxidative stress induced by paraquat or juglone and improves mobility and survival in response to H2O2 and human amyloid (Aβ) toxicity. L-carnitine also alleviates the oxidative stress during aging, resulting in moderate but significant lifespan extension, which was dependent on SKN-1 and DAF-16. Long-lived worms with germline loss (glp-1) or reduced insulin receptor activity (daf-2) recover from aging-associated oxidative stress faster than wild-type controls and their long lifespans were not further increased by L-carnitine. A new gene, T08B1.1, aligned to a known carnitine transporter OCTN1 in humans, is required for L-carnitine uptake in C. elegans. T08B1.1 expression is elevated in daf-2 and glp-1 mutants and its knockdown prevents L-carnitine from improving oxidative stress recovery and prolonging lifespan. Together, our study suggests an important role of L-carnitine in oxidative stress recovery that might be important for healthy aging in humans.
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Affiliation(s)
- Dongliang Liu
- Department of Spine Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xiaofang Zeng
- Department of Cardiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Le Li
- Hunan Yuantai Biotechnology Co., Ltd, Changsha 410000, Hunan, China
| | - Zheng-Lin Ou
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
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20
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Han S, Lv Y, Wang J, Gao M, Yuan F, Wang D. VPS-22/SNF8 regulates longevity via modulating the activity of DAF-16 in C. elegans. Biochem Biophys Res Commun 2020; 532:94-100. [PMID: 32829877 DOI: 10.1016/j.bbrc.2020.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 08/01/2020] [Indexed: 11/17/2022]
Abstract
Aging is regulated by complex signaling networks, the details of which remain poorly understood. Here, we demonstrate that VPS-22/SNF8, a component of endosomal sorting complex required for transport-II (ESCRT-II), regulates the lifespan of C. elegans. In this study we show that worms with vps-22/snf8 gene knockdown had a shorter lifespan than wild-type worms. The expression pattern of VPS-22/SNF8 in C. elegans was highly similar to that of DAF-16. Knockout of daf-16 in C. elegans shortened the worms' lifespan; however, reducing the expression of vps-22/snf8 in daf-16 null worms did not further shorten their lifespan, indicating that vps-22/snf8 and daf-16 may act in the same signaling pathway to regulate longevity. Over-expression of daf-16 rescued the short-lived phenotype of vps-22/snf8 knockdown worms. Moreover, down-regulation of vps-22/snf8 decreased the nuclear localization of DAF-16 and modulated the expression of daf-16 downstream genes that regulate longevity in C. elegans. In summary, our results indicate that vps-22/snf8 can regulate the longevity of C. elegans by partially modulating the activity of daf-16. These findings may help us to better understand the mechanisms of aging.
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Affiliation(s)
- Shanshan Han
- Medical College, China Three Gorges University, Yichang, 443002, Hubei, PR China; The Institute of Infection and Inflammation, China Three Gorges University, Yichang, 443002, Hubei, PR China
| | - Yuexia Lv
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Huazhong University of Science and Technology, 1037 Luoyu Rd., Wuhan, 430074, Hubei, PR China
| | - Jiuxiang Wang
- Experimental Center of Clinical Research, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, Anhui, 230031, PR China
| | - Meng Gao
- Medical College, Henan University of Science and Technology, Luoyang, Henan, PR China
| | - Fating Yuan
- Hubei Provincial Engineering Technology Research Center for Power Transmission Line, College of Electrical Engineering and New Energy, China Three Gorges University, Yichang, 443002, PR China
| | - Decheng Wang
- Medical College, China Three Gorges University, Yichang, 443002, Hubei, PR China; The Institute of Infection and Inflammation, China Three Gorges University, Yichang, 443002, Hubei, PR China.
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21
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Rahman M, Edwards H, Birze N, Gabrilska R, Rumbaugh KP, Blawzdziewicz J, Szewczyk NJ, Driscoll M, Vanapalli SA. NemaLife chip: a micropillar-based microfluidic culture device optimized for aging studies in crawling C. elegans. Sci Rep 2020; 10:16190. [PMID: 33004810 PMCID: PMC7530743 DOI: 10.1038/s41598-020-73002-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 09/10/2020] [Indexed: 01/23/2023] Open
Abstract
In this study, we report a microfluidic device for the whole-life culture of the nematode Caenorhabditis elegans that allows the scoring of animal survival and health measures. This device referred to as the NemaLife chip features: (1) an optimized micropillar arena in which animals can crawl, (2) sieve channels that separate progeny and prevent the loss of adults from the arena during culture maintenance, and (3) ports that allow rapid accessibility for feeding the adult-only population and introducing reagents as needed. The pillar arena geometry was optimized to accommodate the growing body size during culture and emulate the body gait and locomotion of animals reared on agar. Likewise, feeding protocols were optimized to recapitulate longevity outcomes typical of standard plate growth. Key benefits of the NemaLife Chip include eliminating the need to perform repeated manual transfers of adults during survival assays, negating the need for progeny-blocking chemical interventions, and avoiding the swim-induced stress across lifespan in animals reared in liquid. We also show that the culture of animals in pillar-less microfluidic chambers reduces lifespan and introduces physiological stress by increasing the occurrence of age-related vulval integrity disorder. We validated our pillar-based device with longevity analyses of classical aging mutants (daf-2, age-1, eat-2, and daf-16) and animals subjected to RNAi knockdown of age-related genes (age-1 and daf-16). We also showed that healthspan measures such as pharyngeal pumping and tap-induced stimulated reversals can be scored across the lifespan in the NemaLife chip. Overall, the capacity to generate reliable lifespan and physiological data underscores the potential of the NemaLife chip to accelerate healthspan and lifespan investigations in C. elegans.
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Affiliation(s)
- Mizanur Rahman
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, USA
| | - Hunter Edwards
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, USA
| | - Nikolajs Birze
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, USA
| | - Rebecca Gabrilska
- Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, TX, 79409, USA
| | - Kendra P Rumbaugh
- Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, TX, 79409, USA
| | - Jerzy Blawzdziewicz
- Department of Mechanical Engineering, Texas Tech University, Lubbock, TX, 79430, USA
| | - Nathaniel J Szewczyk
- Ohio Musculoskeletal and Neurological Institute and Department of Biomedical Sciences, Ohio University, Athens, OH, 45701, USA
| | - Monica Driscoll
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ, 08854, USA
| | - Siva A Vanapalli
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, USA.
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22
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Vanhunsel S, Beckers A, Moons L. Designing neuroreparative strategies using aged regenerating animal models. Ageing Res Rev 2020; 62:101086. [PMID: 32492480 DOI: 10.1016/j.arr.2020.101086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 04/13/2020] [Accepted: 05/08/2020] [Indexed: 12/13/2022]
Abstract
In our ever-aging world population, the risk of age-related neuropathies has been increasing, representing both a social and economic burden to society. Since the ability to regenerate in the adult mammalian central nervous system is very limited, brain trauma and neurodegeneration are often permanent. As a consequence, novel scientific challenges have emerged and many research efforts currently focus on triggering repair in the damaged or diseased brain. Nevertheless, stimulating neuroregeneration remains ambitious. Even though important discoveries have been made over the past decades, they did not translate into a therapy yet. Actually, this is not surprising; while these disorders mainly manifest in aged individuals, most of the research is being performed in young animal models. Aging of neurons and their environment, however, greatly affects the central nervous system and its capacity to repair. This review provides a detailed overview of the impact of aging on central nervous system functioning and regeneration potential, both in non-regenerating and spontaneously regenerating animal models. Additionally, we highlight the need for aging animal models with regenerative capacities in the search for neuroreparative strategies.
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Affiliation(s)
- Sophie Vanhunsel
- Laboratory of Neural Circuit Development and Regeneration, Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
| | - An Beckers
- Laboratory of Neural Circuit Development and Regeneration, Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
| | - Lieve Moons
- Laboratory of Neural Circuit Development and Regeneration, Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium.
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23
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Ayuda-Durán B, González-Manzano S, González-Paramás AM, Santos-Buelga C. Caernohabditis elegans as a Model Organism to Evaluate the Antioxidant Effects of Phytochemicals. Molecules 2020; 25:E3194. [PMID: 32668705 PMCID: PMC7397024 DOI: 10.3390/molecules25143194] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/09/2020] [Accepted: 07/11/2020] [Indexed: 12/16/2022] Open
Abstract
The nematode Caernohabditis elegans was introduced as a model organism in biological research by Sydney Brenner in the 1970s. Since then, it has been increasingly used for investigating processes such as ageing, oxidative stress, neurodegeneration, or inflammation, for which there is a high degree of homology between C. elegans and human pathways, so that the worm offers promising possibilities to study mechanisms of action and effects of phytochemicals of foods and plants. In this paper, the genes and pathways regulating oxidative stress in C. elegans are discussed, as well as the methodological approaches used for their evaluation in the worm. In particular, the following aspects are reviewed: the use of stress assays, determination of chemical and biochemical markers (e.g., ROS, carbonylated proteins, lipid peroxides or altered DNA), influence on gene expression and the employment of mutant worm strains, either carrying loss-of-function mutations or fluorescent reporters, such as the GFP.
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Affiliation(s)
- Begoña Ayuda-Durán
- Grupo de Investigación en Polifenoles (GIP-USAL), Universidad de Salamanca, E-37007 Salamanca, Spain; (B.A.-D.); (S.G.-M.); (A.M.G.-P.)
| | - Susana González-Manzano
- Grupo de Investigación en Polifenoles (GIP-USAL), Universidad de Salamanca, E-37007 Salamanca, Spain; (B.A.-D.); (S.G.-M.); (A.M.G.-P.)
- Unidad de Excelencia Producción, Agrícola y Medioambiente (AGRIENVIRONMENT), Parque Científico, Universidad de Salamanca, E-37185 Salamanca, Spain
| | - Ana M. González-Paramás
- Grupo de Investigación en Polifenoles (GIP-USAL), Universidad de Salamanca, E-37007 Salamanca, Spain; (B.A.-D.); (S.G.-M.); (A.M.G.-P.)
- Unidad de Excelencia Producción, Agrícola y Medioambiente (AGRIENVIRONMENT), Parque Científico, Universidad de Salamanca, E-37185 Salamanca, Spain
| | - Celestino Santos-Buelga
- Grupo de Investigación en Polifenoles (GIP-USAL), Universidad de Salamanca, E-37007 Salamanca, Spain; (B.A.-D.); (S.G.-M.); (A.M.G.-P.)
- Unidad de Excelencia Producción, Agrícola y Medioambiente (AGRIENVIRONMENT), Parque Científico, Universidad de Salamanca, E-37185 Salamanca, Spain
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24
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GABAergic system's Injuries Induced by Sodium Sulfite in Caenorhabditis elegans Were Prevented by the Anti-Oxidative Properties of Dehydroepiandrosterone Sulfate. Neurotox Res 2020; 38:447-460. [PMID: 32410195 DOI: 10.1007/s12640-020-00207-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 03/10/2020] [Accepted: 04/14/2020] [Indexed: 12/29/2022]
Abstract
Several pathophysiological processes involve Hypoxia conditions, where the nervous system is affected as well. We postulate that the GABAergic system is especially sensitive. Furthermore, drugs improving the resistance to hypoxia have been investigated, such as the neurosteroid dehydroepiandrosterone sulfate (DHEAS) which has shown beneficial effects in hypoxic processes in mammals; however, at the cellular level, its exact mechanism of action has yet to be fully elucidated. Here, we used a chemical hypoxia model through sodium sulfite (SS) exposure in Caenorhabditis elegans (C. elegans), a nematode whose response to hypoxia involves pathways and cellular processes conserved in mammals, and that allows study the direct effect of DHEAS without its conversion to sex hormones. This work aimed to determine the effect of DHEAS on damage to the GABAergic system associated with SS exposure in C. elegans. Worms were subjected to nose touch response (Not Assay) and observed in epifluorescence microscopy. DHEAS decreased the shrinkage response of Not Assay and the level of damage in GABAergic neurons on SS-exposed worms. Also, the enhanced nuclear localization of DAF-16 and consequently the overexpression of chaperone HSP-16.2 by hypoxia were significantly reduced in SS + DHEAS exposed worms. As well, DHEAS increased the survival rate of worms exposed to hydrogen peroxide. These results suggest that hypoxia-caused damage over the GABAergic system was prevented at least partially by DHEAS, probably through non-genomic mechanisms that involve its antioxidant properties related to its chemical structure.
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25
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Lin C, Su Z, Luo J, Jiang L, Shen S, Zheng W, Gu W, Cao Y, Chen Y. Polysaccharide extracted from the leaves of Cyclocarya paliurus (Batal.) Iljinskaja enhanced stress resistance in Caenorhabditis elegans via skn-1 and hsf-1. Int J Biol Macromol 2020; 143:243-254. [DOI: 10.1016/j.ijbiomac.2019.12.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 11/26/2019] [Accepted: 12/03/2019] [Indexed: 01/12/2023]
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26
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Yuan Y, Kang N, Li Q, Zhang Y, Liu Y, Tan P. Study of the Effect of Neutral Polysaccharides from Rehmannia glutinosa on Lifespan of Caenorhabditis elegans. Molecules 2019; 24:E4592. [PMID: 31847478 PMCID: PMC6943622 DOI: 10.3390/molecules24244592] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/05/2019] [Accepted: 12/10/2019] [Indexed: 11/24/2022] Open
Abstract
The problem of an aging society is becoming increasingly acute. Diseases related to aging also come with it. There are some diseases that people can't treat fundamentally. Therefore, people try to find a natural ingredient from natural medicine to treat these diseases and improve the quality of life of the elderly. With the screening of a large number of traditional Chinese medicines, we found that polysaccharides from Rehmannia glutinous (PRG) can prolong the lifespan of Caenorhabditis elegans (C. elegans). Neutral polysaccharide is the main component of PRG. In the present study, we used a C. elegans model to illustrate the stress resistance and lifespan extension effect and mechanism of two kinds of neutral polysaccharide fractions from Rehmannia glutinosa (NPRG), respectively called NPRRP and NPRR. Our data showed that two kinds of neutral polysaccharides fractions could extend the lifespan and delay senescence of wild-type worms. Moreover, the mechanism study revealed that NPRG was able to promote the nuclear localization of DAF-16 resulting in the activation of antioxidant enzymatic systems under oxidative stress. We also observed that NPRG didn't increase the lifespan of mutants with daf-16 portion loss of function, suggesting NPRG prolonging the lifespan partially required the daf-16 gene on the insulin/IGF-1 signaling pathway (IIS). NPRG was found to have no effect on Escherichia coli OP50 (E.coli OP50) growth and pharyngeal pump movement of nematodes, indicating that the anti‑aging effect of NPRG is not realized by the caloric restriction. However, mRNA levels of daf-2 were remarkably decreased after NPRG treatment. Thus daf-2 lost its inhibitory effect on the expression of daf-16 and had a continuous stimulation effect on the IIS, then prolonged the life of nematodes. Overall, our results illustrated the potential utilization of NPRG as a functional pharmaceutical ingredient to increase stress resistance and extend the life of C. elegans via the IIS, which could be developed as a natural supplement agent.
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Affiliation(s)
| | | | | | | | | | - Peng Tan
- College of Chinese Medicine, Beijing University of Chinese Medicine, Beijing 102488, China; (Y.Y.); (N.K.); (Q.L.); (Y.Z.); (Y.L.)
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27
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Wang X, Li H, Liu Y, Wu H, Wang H, Jin S, Lu Y, Chang S, Liu R, Peng Y, Guo Z, Wang X. Velvet antler methanol extracts (MEs) protects against oxidative stress in Caenorhabditis elegans by SKN-1. Biomed Pharmacother 2019; 121:109668. [PMID: 31766103 DOI: 10.1016/j.biopha.2019.109668] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/30/2019] [Accepted: 10/14/2019] [Indexed: 02/07/2023] Open
Abstract
Velvet antler is one of the most important animal medicines or functional foods widely used in East Asia for many centuries, which has several biological activities including anti-ageing and health promotion. To date, the mechanism underlying these effects of velvet antler is widely studied by its protein or polypeptide components. Few studies have been reported for the function of the other components in velvet antler. Herein, C. elegans is used as the model animal to dissect how none protein components of velvet antler affect in vivo oxidative stress. Methanol extracts (MEs) from velvet antler which has few protein components extends the maximum lifespan of C. elegans compared to the control under oxidative stress, while water extracts (WEs) which is protein-rich component has no apparent function. The activity of MEs is mediated by clk-1 signaling pathway, but not via daf-2, eat-2 or glp-1 pathway. Further investigations show MEs decrease endogenous ROS by promoting SKN-1 nuclei translocation, subsequently up-regulating the expression of its target genes gst-4, gst-7 and gst-10 in C. elegans. In all, MEs, the none protein components of velvet antler, protects against oxidative stress in C. elegans, which indicates it might be a product with potential of being a curative medicine.
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Affiliation(s)
- Xue Wang
- Department of Food Science and Engineering, Jilin Agricultural University, Changchun, 130118, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Hongyuan Li
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Ying Liu
- Key Laboratory of Special Animal Molecular Biology of Jilin Province, Specialty Research Institute of Chinese Academy of Agricultural Sciences, Changchun, Jilin 130112, China
| | - Hua Wu
- Department of Food Science and Engineering, Jilin Agricultural University, Changchun, 130118, China
| | - Hongshuang Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Sha Jin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yuyuan Lu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Shuzhuo Chang
- Key Laboratory of Special Animal Molecular Biology of Jilin Province, Specialty Research Institute of Chinese Academy of Agricultural Sciences, Changchun, Jilin 130112, China
| | - Renjie Liu
- Department of Food Science and Engineering, Jilin Agricultural University, Changchun, 130118, China
| | - Yinghua Peng
- Key Laboratory of Special Animal Molecular Biology of Jilin Province, Specialty Research Institute of Chinese Academy of Agricultural Sciences, Changchun, Jilin 130112, China.
| | - Zhijun Guo
- College of Marine Science and Biological Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China; College of Agriculture, Yanbian University, Yanji, 133002, China.
| | - Xiaohui Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China; Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; Department of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China.
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28
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Melouane A, Ghanemi A, Yoshioka M, St-Amand J. Functional genomics applications and therapeutic implications in sarcopenia. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2019; 781:175-185. [PMID: 31416575 DOI: 10.1016/j.mrrev.2019.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 03/14/2019] [Accepted: 04/17/2019] [Indexed: 12/11/2022]
Abstract
The human genome contains around 20,000-25,000 genes coding for 30,000 proteins. Some proteins and genes represent therapeutic targets for human diseases. RNA and protein expression profiling tools allow the study of the molecular basis of aging and drug discovery validation. Throughout the life, there is an age-related and disease-related muscle decline. Sarcopenia is defined as a loss of muscle mass and a decrease in functional properties such as muscle strength and physical performance. Yet, there is still no consensus on the evaluation methods of sarcopenia prognosis. The main challenge of this complex biological phenomena is its multifactorial etiology. Thus, functional genomics methods attempt to shape the related scientific approaches via an innovative in-depth view on sarcopenia. Gene and drug high throughput screening combined with functional genomics allow the generation and the interpretation of a large amount of data related to sarcopenia and therapeutic progress. This review focuses on the application of selected functional genomics techniques such as RNA interference, RNA silencing, proteomics, transgenic mice, metabolomics, genomics, and epigenomics to better understand sarcopenia mechanisms.
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Affiliation(s)
- Aicha Melouane
- CREMI, CHU de Québec Research Center, Quebec, Quebec, G1V 4G2, Canada; Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec, Quebec, G1V 4G2, Canada
| | - Abdelaziz Ghanemi
- CREMI, CHU de Québec Research Center, Quebec, Quebec, G1V 4G2, Canada; Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec, Quebec, G1V 4G2, Canada
| | - Mayumi Yoshioka
- CREMI, CHU de Québec Research Center, Quebec, Quebec, G1V 4G2, Canada
| | - Jonny St-Amand
- CREMI, CHU de Québec Research Center, Quebec, Quebec, G1V 4G2, Canada; Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec, Quebec, G1V 4G2, Canada.
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29
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Su L, Li H, Huang C, Zhao T, Zhang Y, Ba X, Li Z, Zhang Y, Huang B, Lu J, Zhao Y, Li X. Muscle-Specific Histone H3K36 Dimethyltransferase SET-18 Shortens Lifespan of Caenorhabditis elegans by Repressing daf-16a Expression. Cell Rep 2019. [PMID: 29514099 DOI: 10.1016/j.celrep.2018.02.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Mounting evidence shows that histone methylation, a typical epigenetic mark, is crucial for gene expression regulation during aging. Decreased trimethylation of Lys 36 on histone H3 (H3K36me3) in worms and yeast is reported to shorten lifespan. The function of H3K36me2 in aging remains unclear. In this study, we identified Caenorhabditis elegans SET-18 as a histone H3K36 dimethyltransferase. SET-18 deletion extended lifespan and increased oxidative stress resistance, dependent on daf-16 activity in the insulin/IGF pathway. In set-18 mutants, transcription of daf-16 isoform a (daf-16a) was specifically upregulated. Accordingly, a decrease in H3K36me2 on daf-16a promoter was observed. Muscle-specific expression of SET-18 increased in aged worms (day 7 and day 11), attributable to elevation of global H3K36me2 and inhibition of daf-16a expression. Consequently, longevity was shortened. These findings suggested that chromatic repression mediated by tissue-specific H3K36 dimethyltransferase might be detrimental to lifespan and may have implications in human age-related diseases.
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Affiliation(s)
- Liangping Su
- Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Hongyuan Li
- Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Cheng Huang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Tingting Zhao
- Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China
| | - Yongjun Zhang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Xueqing Ba
- Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China
| | - Zhongwei Li
- Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China
| | - Yu Zhang
- Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China
| | - Baiqu Huang
- Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China
| | - Jun Lu
- Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China.
| | - Yanmei Zhao
- Key Laboratory of RNA Biology, Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, CAS Center for Excellence in Biomacromolecules, Chinese Academy of Sciences, Beijing 100101, China.
| | - Xiaoxue Li
- Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University, Changchun 130024, China.
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30
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Pasteurized Orange Juice Rich in Carotenoids Protects Caenorhabditis elegans against Oxidative Stress and β-Amyloid Toxicity through Direct and Indirect Mechanisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5046280. [PMID: 31178963 PMCID: PMC6501168 DOI: 10.1155/2019/5046280] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/28/2018] [Accepted: 01/17/2019] [Indexed: 12/23/2022]
Abstract
‘Cara Cara' is a red orange (Citrus sinensis (L.) Osbeck) variety originally from Venezuela characterized by a significantly higher and diversified carotenoid content including higher-concentration lycopene, all-E-β-carotene, phytoene, and other carotenoids when compared with the carotenoid profile of its isogenic blond counterpart ‘Bahia', also known as Washington navel. The exceptionally high carotenoid content of ‘Cara Cara' is of special interest due to its neuroprotective potential. Here, we used the nematode Caenorhabditis elegans to analyze the antioxidant effect and the protection against β-amyloid-induced toxicity of pasteurized orange juice (POJ) obtained from ‘Cara Cara' and compare to that from ‘Bahia'. POJ treatment reduced the endogenous ROS levels and increased the worm's survival rate under normal and oxidative stress conditions. POJ treatment also upregulated the expression of antioxidant (gcs-1, gst-4, and sod-3) and chaperonin (hsp-16.2) genes. Remarkably, ROS reduction, gene expression activation, oxidative stress resistance, and longevity extension were significantly increased in the animals treated with ‘Cara Cara' orange juice compared to animals treated with ‘Bahia' orange juice. Furthermore, the body paralysis induced by β-amyloid peptide was delayed by both POJs but the mean paralysis time for the worms treated with ‘Cara Cara' orange juice was significantly higher compared to ‘Bahia' orange juice. Our mechanistic studies indicated that POJ-reduced ROS levels are primarily a result of the direct scavenging action of natural compounds available in the orange juice. Moreover, POJ-induced gst-4::GFP expression and –increased stress resistance was dependent of the SKN-1/Nrf2 transcription factor. Finally, the transcription factors SKN-1, DAF-16, and HSF-1 were required for the POJ-mediated protective effect against Aβ toxicity. Collectively, these results suggest that orange juice from ‘Cara Cara' induced a stronger response against oxidative stress and β-amyloid toxicity compared to orange juice from ‘Bahia' possibly due to its higher carotenoid content.
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31
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Aiweixin, a Traditional Uyghur Medicinal Formula, Extends the Lifespan of Caenorhabditis elegans. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:3684601. [PMID: 30755775 PMCID: PMC6348922 DOI: 10.1155/2019/3684601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 09/05/2018] [Accepted: 11/14/2018] [Indexed: 01/15/2023]
Abstract
Aiweixin (AWX) is a traditional Uyghur medicine prescription, which has been used to treat senile diseases for a long time. We investigate whether the AWX extends the lifespan of Caenorhabditis elegans. The AWX decoction was the conventional product for clinical use. The wild-type Caenorhabditis elegans (N2) and mutational worms, daf-16(mu86), glp-1(e2141), daf-2(e1370), and eat-2(ad465), were applied for the lifespan analysis. We found that the lifespan of the N2 adults' worm received 0.005 and 0.01 volume of AWX/total volume was extended significantly, compared to the control without treatment of AWX. The AWX at 0.01 volume of AWX/total volume significantly prolonged the life of both mutational worms, daf-16 (mu86) and eat-2(ad465), but did not increase the lifespan of the mutational worms, daf-2(e1370) and glp-1(e2141). These results indicated that the AWX significantly extended the lifespan of wild-type nematodes, and the life extension effect of AWX was related to the germline longevity pathway and IIS signaling pathway but independent of DAF-16/FOXO.
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32
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Epicatechin modulates stress-resistance in C. elegans via insulin/IGF-1 signaling pathway. PLoS One 2019; 14:e0199483. [PMID: 30689636 PMCID: PMC6349306 DOI: 10.1371/journal.pone.0199483] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 01/11/2019] [Indexed: 11/19/2022] Open
Abstract
The nematode Caenorhabditis elegans has been used to examine the influence of epicatechin (EC), an abundant flavonoid in the human diet, in some stress biomarkers (ROS production, lipid peroxidation and protein carbonylation). Furthermore, the ability of EC to modulate the expression of some key genes in the insulin/IGF-1 signaling pathway (IIS), involved in longevity and oxidative or heat shock stress response, has also been explored. The final aim was to contribute to the elucidation of the mechanisms involved in the biological effects of flavonoids. The results showed that EC-treated wild-type C. elegans exhibited increased survival and reduced oxidative damage of biomolecules when submitted to thermal stress. EC treatment led to a moderate elevation in ROS levels, which might activate endogenous mechanisms of defense protecting against oxidative insult. The enhanced stress resistance induced by EC was found to be mediated through the IIS pathway, since assays in daf-2, age-1, akt-1, akt-2, sgk-1, daf-16, skn-1 and hsf-1 loss of function mutant strains failed to show any heat-resistant phenotype against thermal stress when treated with EC. Consistently, EC treatment upregulated the expression of some stress resistance associated genes, such as gst-4, hsp-16.2 and hsp-70, which are downstream regulated by the IIS pathway.
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33
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Son HG, Seo K, Seo M, Park S, Ham S, An SWA, Choi ES, Lee Y, Baek H, Kim E, Ryu Y, Ha CM, Hsu AL, Roh TY, Jang SK, Lee SJV. Prefoldin 6 mediates longevity response from heat shock factor 1 to FOXO in C. elegans. Genes Dev 2018; 32:1562-1575. [PMID: 30478249 PMCID: PMC6295163 DOI: 10.1101/gad.317362.118] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 10/02/2018] [Indexed: 12/31/2022]
Abstract
Heat shock factor 1 (HSF-1) and forkhead box O (FOXO) are key transcription factors that protect cells from various stresses. In Caenorhabditis elegans, HSF-1 and FOXO together promote a long life span when insulin/IGF-1 signaling (IIS) is reduced. However, it remains poorly understood how HSF-1 and FOXO cooperate to confer IIS-mediated longevity. Here, we show that prefoldin 6 (PFD-6), a component of the molecular chaperone prefoldin-like complex, relays longevity response from HSF-1 to FOXO under reduced IIS. We found that PFD-6 was specifically required for reduced IIS-mediated longevity by acting in the intestine and hypodermis. We showed that HSF-1 increased the levels of PFD-6 proteins, which in turn directly bound FOXO and enhanced its transcriptional activity. Our work suggests that the prefoldin-like chaperone complex mediates longevity response from HSF-1 to FOXO to increase the life span in animals with reduced IIS.
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Affiliation(s)
- Heehwa G Son
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Keunhee Seo
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Mihwa Seo
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea.,School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea.,Center for plant Aging Research, Institute for Basic Science, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, South Korea.,Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, South Korea
| | - Sangsoon Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Seokjin Ham
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Seon Woo A An
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Eun-Seok Choi
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Yujin Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Haeshim Baek
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Eunju Kim
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Youngjae Ryu
- Research Division, Korea Brain Research Institute, Daegu 41068, South Korea
| | - Chang Man Ha
- Research Division, Korea Brain Research Institute, Daegu 41068, South Korea
| | - Ao-Lin Hsu
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA.,Research Center for Healthy Aging, China Medical University, Taichung 404, Taiwan.,Institute of New Drug Development, China Medical University, Taichung 404, Taiwan
| | - Tae-Young Roh
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea.,Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Sung Key Jang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
| | - Seung-Jae V Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea.,School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
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Tambara AL, de Los Santos Moraes L, Dal Forno AH, Boldori JR, Gonçalves Soares AT, de Freitas Rodrigues C, Mariutti LRB, Mercadante AZ, de Ávila DS, Denardin CC. Purple pitanga fruit (Eugenia uniflora L.) protects against oxidative stress and increase the lifespan in Caenorhabditis elegans via the DAF-16/FOXO pathway. Food Chem Toxicol 2018; 120:639-650. [PMID: 30077708 DOI: 10.1016/j.fct.2018.07.057] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/19/2018] [Accepted: 07/30/2018] [Indexed: 12/21/2022]
Abstract
Pitanga, a fruit of the pitangueira tree (Eugenia uniflora L.), is native to Brazil and has a high antioxidant capacity due to the elevated amount of anthocyanins. The present study aimed to investigate the chemical composition of the purple pitanga fruit and to evaluate its antioxidant effect in the nematode Caenorhabditis elegans. We observed that the ethanolic extract of purple pitanga did not cause any toxic effects but notably increased worm lifespan. The extract improved the survival, reproduction and lifespan of the worms in pre- and post-exposure to stressors H2O2 and juglone, as well as improved the lifespan of the oxidative stress hypersensitive strain mev-1. Notably, PPE extract decreased reactive oxygen species by DCF-DA probe and protein carbonyl content from worms stressed with H2O2. The extract also affected the expression of superoxide dismutase SOD-3 and heat shock protein HSP-16.2 levels, daf 16 target genes that modulate lifespan and antioxidant metabolism. In addition, we demonstrate that these effects are dependent on DAF-16, as PPE extract did not provide protection in daf-16 mutants. Therefore, these results suggest that PPE significantly protected against oxidative stress modulating daf-16 target genes.
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Affiliation(s)
- Andréia Limana Tambara
- Universidade Federal Do Pampa, Campus Uruguaiana, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS, Brazil
| | | | - Ana Helena Dal Forno
- Universidade Federal Do Pampa, Campus Uruguaiana, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS, Brazil
| | - Jean Ramos Boldori
- Universidade Federal Do Pampa, Campus Uruguaiana, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS, Brazil
| | | | | | - Lilian Regina Barros Mariutti
- Department of Food Science, Faculty of Food Engineering, University of Campinas (UNICAMP), 13083-162, Campinas, Brazil
| | - Adriana Zerlotti Mercadante
- Department of Food Science, Faculty of Food Engineering, University of Campinas (UNICAMP), 13083-162, Campinas, Brazil
| | - Daiana Silva de Ávila
- Universidade Federal Do Pampa, Campus Uruguaiana, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS, Brazil
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35
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Nowak S, Neidhart J, Szendro IG, Rzezonka J, Marathe R, Krug J. Interaction Analysis of Longevity Interventions Using Survival Curves. BIOLOGY 2018; 7:biology7010006. [PMID: 29316622 PMCID: PMC5872032 DOI: 10.3390/biology7010006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 12/30/2017] [Accepted: 01/03/2018] [Indexed: 01/05/2023]
Abstract
A long-standing problem in ageing research is to understand how different factors contributing to longevity should be expected to act in combination under the assumption that they are independent. Standard interaction analysis compares the extension of mean lifespan achieved by a combination of interventions to the prediction under an additive or multiplicative null model, but neither model is fundamentally justified. Moreover, the target of longevity interventions is not mean life span but the entire survival curve. Here we formulate a mathematical approach for predicting the survival curve resulting from a combination of two independent interventions based on the survival curves of the individual treatments, and quantify interaction between interventions as the deviation from this prediction. We test the method on a published data set comprising survival curves for all combinations of four different longevity interventions in Caenorhabditis elegans. We find that interactions are generally weak even when the standard analysis indicates otherwise.
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Affiliation(s)
- Stefan Nowak
- Systems Biology of Ageing Cologne (Sybacol), University of Cologne, 50931 Cologne, Germany.
- Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany.
| | - Johannes Neidhart
- Systems Biology of Ageing Cologne (Sybacol), University of Cologne, 50931 Cologne, Germany.
- Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany.
- MBR Optical Systems, 42279 Wuppertal, Germany.
| | - Ivan G Szendro
- Systems Biology of Ageing Cologne (Sybacol), University of Cologne, 50931 Cologne, Germany.
- Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany.
| | - Jonas Rzezonka
- Systems Biology of Ageing Cologne (Sybacol), University of Cologne, 50931 Cologne, Germany.
- Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany.
| | - Rahul Marathe
- Systems Biology of Ageing Cologne (Sybacol), University of Cologne, 50931 Cologne, Germany.
- Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany.
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India.
| | - Joachim Krug
- Systems Biology of Ageing Cologne (Sybacol), University of Cologne, 50931 Cologne, Germany.
- Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany.
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Which is the Most Reasonable Anti-aging Strategy: Meta-analysis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1086:267-282. [DOI: 10.1007/978-981-13-1117-8_17] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Natural plant hormones cytokinins increase stress resistance and longevity of Caenorhabditis elegans. Biogerontology 2017; 19:109-120. [DOI: 10.1007/s10522-017-9742-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 12/14/2017] [Indexed: 12/17/2022]
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38
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Inverse correlation between longevity and developmental rate among wild C. elegans strains. Aging (Albany NY) 2017; 8:986-99. [PMID: 27193830 PMCID: PMC4931849 DOI: 10.18632/aging.100960] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 04/27/2016] [Indexed: 02/06/2023]
Abstract
Genetic studies using model organisms have shown that many long-lived mutants display impaired fitness, such as reduced fecundity and delayed development. However, in several wild animals, the association between longevity and fitness does not seem to be inevitable. Thus, the relationship between longevity and fitness in wild organisms remains inconclusive. Here, we determined the correlation between lifespan and fitness, developmental rate and brood size, by using 16 wild-derived C. elegans strains originated from various geographic areas. We found a negative correlation between lifespan and developmental rate. In contrast, we did not find such negative correlation between longevity and developmental rate among the individuals of C. elegans strains. These data imply that polymorphic genetic variants among wild isolates determine resource allocation to longevity and developmental rate.
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Wang B, Wang H, Xiong J, Zhou Q, Wu H, Xia L, Li L, Yu Z. A Proteomic Analysis Provides Novel Insights into the Stress Responses of Caenorhabditis elegans towards Nematicidal Cry6A Toxin from Bacillus thuringiensis. Sci Rep 2017; 7:14170. [PMID: 29074967 PMCID: PMC5658354 DOI: 10.1038/s41598-017-14428-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 10/10/2017] [Indexed: 01/16/2023] Open
Abstract
Cry6A represents a novel family of nematicidal crystal proteins from Bacillus thuringiensis. It has distinctive architecture as well as mechanism of action from Cry5B, a highly focused family of nematicidal crystal proteins, and even from other insecticidal crystal proteins containing the conserved three-domain. However, how nematode defends against Cry6A toxin remains obscure. In this study, the global defense pattern of Caenorhabditis elegans against Cry6Aa2 toxin was investigated by proteomic analysis. In response to Cry6Aa2, 12 proteins with significantly altered abundances were observed from worms, participating in innate immune defense, insulin-like receptor (ILR) signaling pathway, energy metabolism, and muscle assembly. The differentially expressed proteins (DEPs) functioning in diverse biological processes suggest that a variety of defense responses participate in the stress responses of C. elegans to Cry6Aa2. The functional verifications of DEPs suggest that ILR signaling pathway, DIM-1, galectin LEC-6 all are the factors of defense responses to Cry6Aa2. Moreover, Cry6Aa2 also involves in accelerating the metabolic energy production which fulfills the energy demand for the immune responses. In brief, our findings illustrate the global pattern of defense responses of nematode against Cry6A for the first time, and provide a novel insight into the mechanism through which worms respond to Cry6A.
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Affiliation(s)
- Bing Wang
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China
| | - Haiwen Wang
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China
| | - Jing Xiong
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China
| | - Qiaoni Zhou
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China
| | - Huan Wu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China
| | - Liqiu Xia
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China
| | - Lin Li
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, P.R. China
| | - Ziquan Yu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, P.R. China.
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41
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Sasakura H, Moribe H, Nakano M, Ikemoto K, Takeuchi K, Mori I. Lifespan extension by peroxidase and dual oxidase-mediated ROS signaling through pyrroloquinoline quinone in C. elegans. J Cell Sci 2017; 130:2631-2643. [PMID: 28676501 DOI: 10.1242/jcs.202119] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 06/19/2017] [Indexed: 12/26/2022] Open
Abstract
Reactive oxygen species (ROS), originally characterized based on their harmful effects on cells or organisms, are now recognized as important signal molecules regulating various biological processes. In particular, low levels of ROS released from mitochondria extend lifespan. Here, we identified a novel mechanism of generating appropriate levels of ROS at the plasma membrane through a peroxidase and dual oxidase (DUOX) system, which could extend lifespan in Caenorhabditis elegans A redox co-factor, pyrroloquinoline quinone (PQQ), activates the C. elegans DUOX protein BLI-3 to produce the ROS H2O2 at the plasma membrane, which is subsequently degraded by peroxidase (MLT-7), eventually ensuring adequate levels of ROS. These ROS signals are transduced mainly by the oxidative stress transcriptional factors SKN-1 (Nrf2 or NFE2L2 in mammals) and JUN-1, and partially by DAF-16 (a FOXO protein homolog). Cell biology experiments demonstrated a similarity between the mechanisms of PQQ-induced activation of human DUOX1 and DUOX2 and that of C. elegans BLI-3, suggesting that DUOXs are potential targets of intervention for lifespan extension. We propose that low levels of ROS, fine-tuned by the peroxidase and dual oxidase system at the plasma membrane, act as second messengers to extend lifespan by the effect of hormesis.
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Affiliation(s)
- Hiroyuki Sasakura
- Neuroscience Institute and Group of Molecular Neurobiology, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Hiroki Moribe
- Department of Biology, Kurume University School of Medicine, Kurume 830-0011, Japan
| | - Masahiko Nakano
- Niigata Research Laboratory, Mitsubishi Gas Chemical Company Inc., Niigata 950-3112, Japan
| | - Kazuto Ikemoto
- Niigata Research Laboratory, Mitsubishi Gas Chemical Company Inc., Niigata 950-3112, Japan
| | - Kosei Takeuchi
- Department of Medical Biology, Aichi Medical University, 1-1 Yazako-Karimata, Nagakute, Aichi 480-1195, Japan
| | - Ikue Mori
- Neuroscience Institute and Group of Molecular Neurobiology, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
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Groh N, Bühler A, Huang C, Li KW, van Nierop P, Smit AB, Fändrich M, Baumann F, David DC. Age-Dependent Protein Aggregation Initiates Amyloid-β Aggregation. Front Aging Neurosci 2017; 9:138. [PMID: 28567012 PMCID: PMC5434662 DOI: 10.3389/fnagi.2017.00138] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 04/24/2017] [Indexed: 11/13/2022] Open
Abstract
Aging is the most important risk factor for neurodegenerative diseases associated with pathological protein aggregation such as Alzheimer's disease. Although aging is an important player, it remains unknown which molecular changes are relevant for disease initiation. Recently, it has become apparent that widespread protein aggregation is a common feature of aging. Indeed, several studies demonstrate that 100s of proteins become highly insoluble with age, in the absence of obvious disease processes. Yet it remains unclear how these misfolded proteins aggregating with age affect neurodegenerative diseases. Importantly, several of these aggregation-prone proteins are found as minor components in disease-associated hallmark aggregates such as amyloid-β plaques or neurofibrillary tangles. This co-localization raises the possibility that age-dependent protein aggregation directly contributes to pathological aggregation. Here, we show for the first time that highly insoluble proteins from aged Caenorhabditis elegans or aged mouse brains, but not from young individuals, can initiate amyloid-β aggregation in vitro. We tested the seeding potential at four different ages across the adult lifespan of C. elegans. Significantly, protein aggregates formed during the early stages of aging did not act as seeds for amyloid-β aggregation. Instead, we found that changes in protein aggregation occurring during middle-age initiated amyloid-β aggregation. Mass spectrometry analysis revealed several late-aggregating proteins that were previously identified as minor components of amyloid-β plaques and neurofibrillary tangles such as 14-3-3, Ubiquitin-like modifier-activating enzyme 1 and Lamin A/C, highlighting these as strong candidates for cross-seeding. Overall, we demonstrate that widespread protein misfolding and aggregation with age could be critical for the initiation of pathogenesis, and thus should be targeted by therapeutic strategies to alleviate neurodegenerative diseases.
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Affiliation(s)
- Nicole Groh
- Protein Aggregation and Aging, German Center for Neurodegenerative DiseasesTübingen, Germany.,Graduate School of Cellular and Molecular NeuroscienceTübingen, Germany
| | - Anika Bühler
- Hertie Institute for Clinical Brain Research, Department of Cellular NeurologyTübingen, Germany
| | - Chaolie Huang
- Protein Aggregation and Aging, German Center for Neurodegenerative DiseasesTübingen, Germany
| | - Ka Wan Li
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University AmsterdamAmsterdam, Netherlands
| | - Pim van Nierop
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University AmsterdamAmsterdam, Netherlands
| | - August B Smit
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University AmsterdamAmsterdam, Netherlands
| | - Marcus Fändrich
- Institute of Protein Biochemistry, Ulm UniversityUlm, Germany
| | - Frank Baumann
- Hertie Institute for Clinical Brain Research, Department of Cellular NeurologyTübingen, Germany
| | - Della C David
- Protein Aggregation and Aging, German Center for Neurodegenerative DiseasesTübingen, Germany
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Abstract
There has been a recent surge of interest in computer-aided rapid data acquisition to increase the potential throughput and reduce the labour costs of large scale Caenorhabditis elegans studies. We present Automated WormScan, a low-cost, high-throughput automated system using commercial photo scanners, which is extremely easy to implement and use, capable of scoring tens of thousands of organisms per hour with minimal operator input, and is scalable. The method does not rely on software training for image recognition, but uses the generation of difference images from sequential scans to identify moving objects. This approach results in robust identification of worms with little computational demand. We demonstrate the utility of the system by conducting toxicity, growth and fecundity assays, which demonstrate the consistency of our automated system, the quality of the data relative to manual scoring methods and congruity with previously published results.
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Affiliation(s)
- Timothy Puckering
- School of Biological Sciences, University of Queensland, St Lucia, QLD, 4072, Australia.,Plant Biosecurity Cooperative Research Centre, Canberra, ACT, 2617, Australia
| | - Jake Thompson
- School of Biological Sciences, University of Queensland, St Lucia, QLD, 4072, Australia
| | - Sushruth Sathyamurthy
- School of Biological Sciences, University of Queensland, St Lucia, QLD, 4072, Australia
| | - Sinduja Sukumar
- School of Biological Sciences, University of Queensland, St Lucia, QLD, 4072, Australia
| | - Tirosh Shapira
- School of Biological Sciences, University of Queensland, St Lucia, QLD, 4072, Australia
| | - Paul Ebert
- School of Biological Sciences, University of Queensland, St Lucia, QLD, 4072, Australia.,Plant Biosecurity Cooperative Research Centre, Canberra, ACT, 2617, Australia
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44
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Herndon LA, Wolkow CA, Driscoll M, Hall DH. Effects of Ageing on the Basic Biology and Anatomy of C. elegans. HEALTHY AGEING AND LONGEVITY 2017. [DOI: 10.1007/978-3-319-44703-2_2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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45
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Structural and functional characterisation of FOXO/Acan-DAF-16 from the parasitic nematode Angiostrongylus cantonensis. Acta Trop 2016; 164:125-136. [PMID: 27619188 DOI: 10.1016/j.actatropica.2016.09.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 09/08/2016] [Accepted: 09/09/2016] [Indexed: 12/15/2022]
Abstract
Fork head box transcription factors subfamily O (FoxO) is regarded to be significant in cell-cycle control, cell differentiation, ageing, stress response, apoptosis, tumour formation and DNA damage repair. In the free-living nematode Caenorhabditis elegans, the FoxO transcription factor is encoded by Ce-daf-16, which is negatively regulated by insulin-like signaling (IIS) and involved in promoting dauer formation through bringing about its hundreds of downstream genes expression. In nematode parasites, orthologues of daf-16 from several species have been identified, with functions in rescue of dauer phenotypes determined in a surrogate system C. elegans. In this study, we identified the FoxO encoding gene, Acan-daf-16, from the parasitic nematode Angiostrongylus cantonensis, and determined the genomic structures, transcripts and functions far more thorough in longevity, stress resistance and dauer formation. Acan-daf-16 encodes two proteins, Acan-DAF-16A and Acan-DAF-16B, consisting of 555 and 491 amino acids, respectively. Both isoforms possess the highly conserved fork head domains. Acan-daf-16A and Acan-daf-16B are expressed from distinct promoters. The expression patterns of Acan-daf-16 isoforms in the C. elegans surrogate system showed that p Acan-daf-16a:gfp was expressed in all cells of C. elegans, including the pharynx, and the expression of p Acan-daf-16b:gfp was restricted to the pharynx. In addition to the same genomic organization to the orthologue in C. elegans, Ce-daf-16, both Acan-DAF-16 isoforms could restore the C. elegans daf-16(mg54) mutation in longevity, dauer formation and stress resistance, in spite of the partial complementation of Acan-DAF-16B isoform in longevity. These findings provide further evidence of the functional conservation of DAF-16s between parasitic nematodes and the free-living nematode C. elegans.
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46
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Cornils A, Maurya AK, Tereshko L, Kennedy J, Brear AG, Prahlad V, Blacque OE, Sengupta P. Structural and Functional Recovery of Sensory Cilia in C. elegans IFT Mutants upon Aging. PLoS Genet 2016; 12:e1006325. [PMID: 27906968 PMCID: PMC5131903 DOI: 10.1371/journal.pgen.1006325] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/25/2016] [Indexed: 01/28/2023] Open
Abstract
The majority of cilia are formed and maintained by the highly conserved process of intraflagellar transport (IFT). Mutations in IFT genes lead to ciliary structural defects and systemic disorders termed ciliopathies. Here we show that the severely truncated sensory cilia of hypomorphic IFT mutants in C. elegans transiently elongate during a discrete period of adult aging leading to markedly improved sensory behaviors. Age-dependent restoration of cilia morphology occurs in structurally diverse cilia types and requires IFT. We demonstrate that while DAF-16/FOXO is dispensable, the age-dependent suppression of cilia phenotypes in IFT mutants requires cell-autonomous functions of the HSF1 heat shock factor and the Hsp90 chaperone. Our results describe an unexpected role of early aging and protein quality control mechanisms in suppressing ciliary phenotypes of IFT mutants, and suggest possible strategies for targeting subsets of ciliopathies. Cilia are ‘antenna-like’ structures that are present on nearly all cell types in animals. These structures are important for sensing and signaling external cues to the cell. Most cilia are formed by a protein transport process called ‘intraflagellar transport’ or IFT. Mutations in IFT genes result in severe cilia defects, and are causal to a large number of diverse human disorders called ciliopathies. Since the genes and processes by which cilia are formed are similar across species, studies in experimental models such as the nematode C. elegans can greatly inform our overall understanding of cilia formation and function. Here we report the surprising observation that the structures and functions of severely defective cilia in nematodes with disrupted IFT genes markedly improve upon aging. We find that protein quality control mechanisms that normally decline in aging are required for this age-dependent recovery of cilia structure. Our results raise the possibility that the effects of some mutations in IFT genes can be bypassed under specific conditions, thereby restoring cilia functions.
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Affiliation(s)
- Astrid Cornils
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, Massachusetts
| | - Ashish K. Maurya
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, Massachusetts
| | - Lauren Tereshko
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, Massachusetts
| | - Julie Kennedy
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Andrea G. Brear
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, Massachusetts
| | - Veena Prahlad
- Department of Biology, Aging Mind and Brain Initiative, University of Iowa, Iowa City, Iowa
| | - Oliver E. Blacque
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Piali Sengupta
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, Massachusetts
- * E-mail:
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Mouchiroud L, Sorrentino V, Williams EG, Cornaglia M, Frochaux MV, Lin T, Nicolet-Dit-Félix AA, Krishnamani G, Ouhmad T, Gijs MAM, Deplancke B, Auwerx J. The Movement Tracker: A Flexible System for Automated Movement Analysis in Invertebrate Model Organisms. ACTA ACUST UNITED AC 2016; 77:8.37.1-8.37.21. [PMID: 27696358 DOI: 10.1002/cpns.17] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Phenotyping strategies in simple model organisms such as D. melanogaster and C. elegans are often broadly limited to growth, aging, and fitness. Recently, a number of physical setups and video tracking software suites have been developed to allow for accurate, quantitative, and high-throughput analysis of movement in flies and worms. However, many of these systems require precise experimental setups and/or fixed recording formats. We report here an update to the Parallel Worm Tracker software, which we termed the Movement Tracker. The Movement Tracker allows variable experimental setups to provide cross-platform automated processing of a variety of movement characteristics in both worms and flies and permits the use of simple physical setups that can be readily implemented in any laboratory. This software allows high-throughput processing capabilities and high levels of flexibility in video analysis, providing quantitative movement data on C. elegans and D. melanogaster in a variety of different conditions. © 2016 by John Wiley & Sons, Inc.
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Affiliation(s)
- Laurent Mouchiroud
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Vincenzo Sorrentino
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Evan G Williams
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Matteo Cornaglia
- Laboratory of Microsystems, École Polytechnique Fédérale de Lausanne, Switzerland, Lausanne, Switzerland
| | - Michael V Frochaux
- Laboratory of Systems Biology and Genetics, École Polytechnique Fédérale de Lausanne, Switzerland, Lausanne, Switzerland
| | - Tao Lin
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Amandine A Nicolet-Dit-Félix
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Gopal Krishnamani
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Tarik Ouhmad
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Martin A M Gijs
- Laboratory of Microsystems, École Polytechnique Fédérale de Lausanne, Switzerland, Lausanne, Switzerland
| | - Bart Deplancke
- Laboratory of Systems Biology and Genetics, École Polytechnique Fédérale de Lausanne, Switzerland, Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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Cattie DJ, Richardson CE, Reddy KC, Ness-Cohn EM, Droste R, Thompson MK, Gilbert WV, Kim DH. Mutations in Nonessential eIF3k and eIF3l Genes Confer Lifespan Extension and Enhanced Resistance to ER Stress in Caenorhabditis elegans. PLoS Genet 2016; 12:e1006326. [PMID: 27690135 PMCID: PMC5045169 DOI: 10.1371/journal.pgen.1006326] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 08/26/2016] [Indexed: 11/18/2022] Open
Abstract
The translation initiation factor eIF3 is a multi-subunit protein complex that coordinates the assembly of the 43S pre-initiation complex in eukaryotes. Prior studies have demonstrated that not all subunits of eIF3 are essential for the initiation of translation, suggesting that some subunits may serve regulatory roles. Here, we show that loss-of-function mutations in the genes encoding the conserved eIF3k and eIF3l subunits of the translation initiation complex eIF3 result in a 40% extension in lifespan and enhanced resistance to endoplasmic reticulum (ER) stress in Caenorhabditis elegans. In contrast to previously described mutations in genes encoding translation initiation components that confer lifespan extension in C. elegans, loss-of-function mutations in eif-3.K or eif-3.L are viable, and mutants show normal rates of growth and development, and have wild-type levels of bulk protein synthesis. Lifespan extension resulting from EIF-3.K or EIF-3.L deficiency is suppressed by a mutation in the Forkhead family transcription factor DAF-16. Mutations in eif-3.K or eif-3.L also confer enhanced resistance to ER stress, independent of IRE-1-XBP-1, ATF-6, and PEK-1, and independent of DAF-16. Our data suggest a pivotal functional role for conserved eIF3k and eIF3l accessory subunits of eIF3 in the regulation of cellular and organismal responses to ER stress and aging.
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Affiliation(s)
- Douglas J. Cattie
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Claire E. Richardson
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Kirthi C. Reddy
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Elan M. Ness-Cohn
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Rita Droste
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- Howard Hughes Medical Institute, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Mary K. Thompson
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Wendy V. Gilbert
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Dennis H. Kim
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- * E-mail:
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l-Arginine Enhances Resistance against Oxidative Stress and Heat Stress in Caenorhabditis elegans. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13100969. [PMID: 27690079 PMCID: PMC5086708 DOI: 10.3390/ijerph13100969] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/23/2016] [Accepted: 09/20/2016] [Indexed: 01/21/2023]
Abstract
The antioxidant properties of l-arginine (l-Arg) in vivo, and its effect on enhancing resistance to oxidative stress and heat stress in Caenorhabditis elegans were investigated. C. elegans, a worm model popularly used in molecular and developmental biology, was used in the present study. Here, we report that l-Arg, at a concentration of 1 mM, prolonged C. elegans life by 26.98% and 37.02% under oxidative and heat stress, respectively. Further experiments indicated that the longevity-extending effects of l-Arg may be exerted by its free radical scavenging capacity and the upregulation of aging-associated gene expression in worms. This work is important in the context of numerous recent studies that concluded that environment stresses are associated with an increased population death rate.
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Kumar N, Jain V, Singh A, Jagtap U, Verma S, Mukhopadhyay A. Genome-wide endogenous DAF-16/FOXO recruitment dynamics during lowered insulin signalling in C. elegans. Oncotarget 2016; 6:41418-33. [PMID: 26539642 PMCID: PMC4747164 DOI: 10.18632/oncotarget.6282] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/20/2015] [Indexed: 11/25/2022] Open
Abstract
Lowering insulin-IGF-1-like signalling (IIS) activates FOXO transcription factors (TF) to extend life span across species. To study the dynamics of FOXO chromatin occupancy under this condition in C. elegans, we report the first recruitment profile of endogenous DAF-16 and show that the response is conserved. DAF-16 predominantly acts as a transcriptional activator and binding within the 0.5 kb promoter-proximal region results in maximum induction of downstream targets that code for proteins involved in detoxification and longevity. Interestingly, genes that are activated under low IIS already have higher DAF-16 recruited to their promoters in WT. DAF-16 binds to variants of the FOXO consensus sequence in the promoter proximal regions of genes that are exclusively targeted during low IIS. We also define a set of 'core' direct targets, after comparing multiple studies, which tend to co-express and contribute robustly towards IIS-associated phenotypes. Additionally, we show that nuclear hormone receptor DAF-12 as well as zinc-finger TF EOR-1 may bind DNA in close proximity to DAF-16 and distinct TF classes that are direct targets of DAF-16 may be instrumental in regulating its indirect targets. Together, our study provides fundamental insights into the transcriptional biology of FOXO/DAF-16 and gene regulation downstream of the IIS pathway.
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Affiliation(s)
- Neeraj Kumar
- Molecular Aging Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India.,Current address: Centre for Human Genetics and Molecular Medicine, School of Health Sciences , Central University of Punjab, Bathinda, India
| | - Vaibhav Jain
- Molecular Aging Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Anupama Singh
- Molecular Aging Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Urmila Jagtap
- Molecular Aging Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Sonia Verma
- Molecular Aging Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Arnab Mukhopadhyay
- Molecular Aging Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
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