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Gao X, Yu J, Zhang L, Shi H, Yan Y, Han Y, Fang M, Liu Y, Wu C, Fan S, Huang C. Mulberrin extends lifespan in Caenorhabditis elegans through detoxification function. J Appl Toxicol 2024; 44:833-845. [PMID: 38291015 DOI: 10.1002/jat.4578] [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: 10/07/2023] [Revised: 12/06/2023] [Accepted: 12/27/2023] [Indexed: 02/01/2024]
Abstract
Mulberrin, a naturally occurring flavone found in mulberry and Romulus Mori, exhibits diverse biological functions. Here, we showed that mulberrin extended both the lifespan and healthspan in C. elegans. Moreover, mulberrin increased the worms' resistance to toxicants and activated the expression of detoxification genes. The longevity-promoting effect of mulberrin was attenuated in nuclear hormone receptor (NHR) homologous nhr-8 and daf-12 mutants, indicating that the lifespan extending effects of mulberrin in C. elegans may depend on nuclear hormone receptors NHR-8/DAF-12. Further analyses revealed the potential associations between the longevity effects of mulberrin and the insulin/insulin-like growth factor signaling (IIS) and adenosine 5'-monophosphate-activated protein kinase (AMPK) pathways. Together, our findings suggest that mulberrin may prolong lifespan and healthspan by activating detoxification functions mediated by nuclear receptors.
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Affiliation(s)
- Xiaoyan Gao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jing Yu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lijun Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hang Shi
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yingxuan Yan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yongli Han
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Minglv Fang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chengyuan Wu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shengjie Fan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Cheng Huang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Liu M, Gao X, Shan S, Li Y, Wang J, Lu W. Eleutheroside E reduces intestinal fat accumulation in Caenorhabditis elegans through neuroendocrine signals. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:5219-5228. [PMID: 35297055 DOI: 10.1002/jsfa.11875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 01/13/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Acanthopanax senticosus, a small woody shrub of the family Araliaceae, can be used as a functional food with multiple biological activities. Eleutheroside E (EE), an important active component of A. senticosus, has significant effects on neurological diseases. However, whether EE can regulate lipid metabolism has not been reported. The brain can mediate communication between neurons and intestinal cells through long-distance neuroendocrine signals. We speculated that EE might regulate the intestinal lipid metabolism of Caenorhabditis elegans through neuroendocrine signals. RESULTS First, we found that EE reduced the intestinal fat content of C. elegans, without affecting development, reproduction, food intake or movement. In addition, EE significantly regulated genes and metabolites related to lipid metabolism. EE extensively affected fatty acid synthesis, β-oxidation and lipolysis processes, and regulated the content of various fatty acid and lipid metabolism intermediates. We finally proved that EE reduced intestinal fat storage through serotonin and neuropeptide flp-7-npr-22 pathways in the nervous system. CONCLUSION EE is expected to be a functional food that regulates lipid metabolism. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Mengyao Liu
- Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China
- National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
- School of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin, China
| | - Xin Gao
- Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China
- National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
- School of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin, China
| | - Shan Shan
- Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China
- National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
- School of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin, China
| | - Yongzhi Li
- Key Laboratory of Astronaut Health Center, China Astronaut Research and Training Center, Beijing, China
| | - Jiaping Wang
- Key Laboratory of Astronaut Health Center, China Astronaut Research and Training Center, Beijing, China
| | - Weihong Lu
- Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China
- National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
- School of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin, China
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Sweet tea (Rubus Suavissmus S. Lee) polysaccharides promote the longevity of Caenorhabditis elegans through autophagy-dependent insulin and mitochondrial pathways. Int J Biol Macromol 2022; 207:883-892. [PMID: 35351545 DOI: 10.1016/j.ijbiomac.2022.03.138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 03/13/2022] [Accepted: 03/22/2022] [Indexed: 12/24/2022]
Abstract
The fine structure of sweet tea polysaccharide (STP-60a) has been characterized. However, the biological activity of STP-60a has not been extensively explored. This study aims to evaluate the anti-aging activity of STP-60a using Caenorhabditis elegans (C. elegans) as a model and to investigate the underlying molecular mechanism. 400 μg/mL of STP-60a increased the mean lifespan of C. elegans by 22.88%, reduced the lipofuscin content by 33.01%, and improved the survival rate under heat stress and oxidative stress by 32.33% and 27.63%, respectively. Further research in lifespan-related mutants revealed that STP-60a exerted anti-aging effects mainly through insulin and mitochondrial signaling pathways. Through qRT-PCR and microscopic imaging of transgenic nematodes, we found that 400 μg/mL of STP-60a increased the expression of daf-16, skn-1, and hsf-1 downstream of the insulin pathway by 1.68-fold, 1.88-fold, and 1.03-fold, respectively, and promoted the accumulation of daf-16 and skn-1 in the nucleus. STP-60a also significantly regulated the function of the mitochondrial respiratory chain and unfolded protein recovery system. Furthermore, STP-60a activated the autophagy level in C. elegans, and the mutation of daf-2 or clk-1 inhibited the upregulation of autophagy genes by STP-60a, suggesting that autophagy acted as an effector of the insulin and mitochondrial pathways during STP-60a antiaging.
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Acanthopanax senticosus Polysaccharide Enhances the Pathogen Resistance of Radiation-Damaged Caenorhabditis elegans through Intestinal p38 MAPK-SKN-1/ATF-7 Pathway and Stress Response. Int J Mol Sci 2022; 23:ijms23095034. [PMID: 35563423 PMCID: PMC9103771 DOI: 10.3390/ijms23095034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 02/01/2023] Open
Abstract
With the advancement of science and technology, humans are chronically exposed to ionizing radiation. It is crucial to look for efficient and low-toxic anti-radiation agents. Through preliminary screening, we found that Acanthopanax senticosus polysaccharide (ASPS) played a major role in regulating immune damage caused by radiation. The objective of this study was to apply the Caenorhabditis elegans—P. aeruginosa (PA14) infection model to illuminate the mechanism of ASPS increasing the pathogen resistance of radiation-damaged nematodes. Results indicated that ASPS (1 mg/mL) significantly enhanced the pathogen resistance of radiation-damaged nematodes by directly elevating the immune response of nematodes rather than by affecting the bacterial activity. Through further research on the p38 MAPK signaling pathway and related mutants, we found that ASPS functioned by the p38 MAPK pathway in the intestine, and SKN-1, ATF-7 as the downstream targets of PMK-1 participated the regulation of ASPS. In addition, ASPS markedly alleviated the stress status of damaged nematodes by regulating oxidative stress. Collectively, our findings suggest that ASPS enhances the pathogen resistance of radiation-damaged nematodes through the intestinal p38MAPK-SKN-1/ATF-7 pathway and stress response.
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Lin C, Lin Y, Meng T, Lian J, Liang Y, Kuang Y, Cao Y, Chen Y. Anti-fat effect and mechanism of polysaccharide-enriched extract from Cyclocarya paliurus (Batal.) Iljinskaja in Caenorhabditis elegans. Food Funct 2020; 11:5320-5332. [DOI: 10.1039/c9fo03058a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Obesity is a global epidemic. The polysaccharide extract from Cyclocarya paliurus have good performance in safely alleviating the fat accumulation of C. elegans, which is expected to be developed into an effective natural anti-obesity product.
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Affiliation(s)
- Chunxiu Lin
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Yizi Lin
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Tianmeng Meng
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Jiayi Lian
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Yu Liang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | | | - Yong Cao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
| | - Yunjiao Chen
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods
- College of Food Science
- South China Agricultural University
- Guangzhou 510642
- China
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Papaevgeniou N, Hoehn A, Tur JA, Klotz LO, Grune T, Chondrogianni N. Sugar-derived AGEs accelerate pharyngeal pumping rate and increase the lifespan of Caenorhabditis elegans. Free Radic Res 2019; 53:1056-1067. [DOI: 10.1080/10715762.2019.1661403] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Nikoletta Papaevgeniou
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- Nutrigenomics Section, Institute of Nutritional Sciences, Friedrich Schiller University of Jena, Jena, Germany
| | - Annika Hoehn
- Department of Molecular Toxicology, German Institute of Human Nutrition, Nuthetal, Germany
- German Center for Diabetes Research, München, Germany
| | - Josep A. Tur
- Research Group on Nutrition and Oxidative Stress, University of the Balearic Islands and CIBEROBN (Physiopathology of Obesity and Nutrition), Palma de Mallorca, Spain
| | - Lars-Oliver Klotz
- Nutrigenomics Section, Institute of Nutritional Sciences, Friedrich Schiller University of Jena, Jena, Germany
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition, Nuthetal, Germany
- German Center for Diabetes Research, München, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
- Institute of Nutritional Sciences, University of Potsdam, Nuthetal, Germany
| | - Niki Chondrogianni
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
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Pandey T, Sammi SR, Nooreen Z, Mishra A, Ahmad A, Bhatta RS, Pandey R. Anti-ageing and anti-Parkinsonian effects of natural flavonol, tambulin from Zanthoxyllum aramatum promotes longevity in Caenorhabditis elegans. Exp Gerontol 2019; 120:50-61. [DOI: 10.1016/j.exger.2019.02.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/12/2019] [Accepted: 02/25/2019] [Indexed: 12/01/2022]
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Liu F, Zaman WQ, Peng H, Li C, Cao X, Huang K, Cui C, Zhang W, Lin K, Luo Q. Ecotoxicity of Caenorhabditis elegans following a step and repeated chronic exposure to tetrabromobisphenol A. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:273-281. [PMID: 30453175 DOI: 10.1016/j.ecoenv.2018.10.113] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 10/28/2018] [Accepted: 10/30/2018] [Indexed: 06/09/2023]
Abstract
To better understand the toxicity of tetrabromobisphenol A (TBBPA), its effects on the model nematode Caenorhabditis elegans were investigated. Following a step and repeated chronic exposure from L4-larvae to day-10 adult, physiology endpoints (growth and locomotion behaviors including head thrashes, body bends and pumping rate), biochemical endpoints (reactive oxygen species, superoxide dismutase activity, catalase activity), and molecular stress-related gene expression were tested at environmentally relevant concentrations of TBBPA (0.01-100 µg/L). The results showed that concentrations of TBBPA greater than 10 µg/L, clearly influenced the physiology behaviors (growth and locomotion endpoints). Under repeated exposure, C. elegans exhibited adaptive responses in head thrashes and pumping rate. Compared to toxicity evaluation following repeated chronic exposure, a significantly greater response was induced at the same concentration following a step chronic exposure. Reactive oxygen species production was significantly enhanced following a step and repeated TBBPA exposure at the concentrations of 1 and 10 µg/L, respectively. qRT-PCR showed that ctl-1, ctl-2, ctl-3 and sod-3 expression significantly increased, which was obviously correlated with physiological and biochemical behaviors under both treatment conditions according to Pearson correlation test analysis. sod-3 and ctl-2 mutations were more sensitive than the wild-type N2 under a step chronic TBBPA exposure at a level of 10 µg/L. Thus, chronic exposure to TBBPA induces an oxidative stress response in C. elegans, with ctl-2 and sod-3 playing a vital role in TBBPA-induced toxicity in nematodes.
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Affiliation(s)
- Fuwen Liu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Waqas Qamar Zaman
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hongjiang Peng
- Branch of Shanghai, Longking Environmental Protection Co., Ltd, Shanghai 200331, China
| | - Chao Li
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xue Cao
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kai Huang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Changzheng Cui
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kuangfei Lin
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Qishi Luo
- Branch of Shanghai, Yonker Environmental Protection Co., Ltd, Shanghai 200051, China.
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Olah Z, Bush AI, Aleksza D, Galik B, Ivitz E, Macsai L, Janka Z, Karman Z, Kalman J, Datki Z. Novel in vivo experimental viability assays with high sensitivity and throughput capacity using a bdelloid rotifer. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 144:115-122. [PMID: 28605645 DOI: 10.1016/j.ecoenv.2017.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 05/29/2017] [Accepted: 06/02/2017] [Indexed: 06/07/2023]
Abstract
Rotifers have been used in biological research as well-characterized models of aging. Their multi-organ characters and their sensitivity for chemicals and environmental changes make them useful as in vivo toxicological and lifespan models. Our aim was to create a bdelloid rotifer model to use in high-throughput viability and non-invasive assays. In order to identify our species Philodina acuticornis odiosa (PA), 18S rDNA-based phylogenetic analysis was carried out and their species-specific morphological markers identified. To execute the rotifer-based experiments, we developed an oil-covered water-drop methodology adapted from human in vitro fertilization techniques. This enables toxicological observations of individual one-housed rotifers in a closed and controllable micro-environment for up to several weeks. Hydrogen peroxide (H2O2) and sodium azide (NaN3) exposures were used as well-understood toxins. The toxicity and survival lifespan (TSL), the bright light disturbance (BLD) the mastax contraction frequency (MCF) and the cellular reduction capacity (CRC), indices were recorded. These newly developed assays were used to test the effects of lethal and sublethal doses of the toxins. The results showed the expected dose-dependent decrease in indices. These four different assays can either be used independently or as an integrated system for studying rotifers. These new indices render the PA invertebrate rotifer model a quantitative system for measuring viability, toxicity and lifespan (with TSL), systemic reaction capacity (with BLD), organic functionality (with MCF) and reductive capability of rotifers (with CRC), in vivo. This novel multi-level system is a reliable, sensitive and replicable screening tool with potential application in pharmaceutical science.
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Affiliation(s)
- Zita Olah
- Department of Psychiatry, University of Szeged, Szeged, Hungary
| | - Ashley I Bush
- Oxidation Biology Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - David Aleksza
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
| | - Bence Galik
- Bioinformatics & Scientific Computing, Vienna Biocenter Core Facilities, Vienna, Austria
| | - Eszter Ivitz
- Department of Psychiatry, University of Szeged, Szeged, Hungary
| | - Lilla Macsai
- Department of Psychiatry, University of Szeged, Szeged, Hungary
| | - Zoltan Janka
- Department of Psychiatry, University of Szeged, Szeged, Hungary
| | - Zoltan Karman
- Department of Psychiatry, University of Szeged, Szeged, Hungary
| | - Janos Kalman
- Department of Psychiatry, University of Szeged, Szeged, Hungary
| | - Zsolt Datki
- Department of Psychiatry, University of Szeged, Szeged, Hungary.
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Romanovskaya EV, Vikhnina MV, Grishina TV, Ivanov MP, Leonova LE, Tsvetkova EV. Transcription factors of the NF1 family: Possible mechanisms of inducible gene expression in the evolutionary lineage of multicellular animals. J EVOL BIOCHEM PHYS+ 2017. [DOI: 10.1134/s123456781702001x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Srivastava S, Sammi SR, Laxman TS, Pant A, Nagar A, Trivedi S, Bhatta RS, Tandon S, Pandey R. Silymarin promotes longevity and alleviates Parkinson’s associated pathologies in Caenorhabditis elegans. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.01.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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12
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Filippopoulou K, Papaevgeniou N, Lefaki M, Paraskevopoulou A, Biedermann D, Křen V, Chondrogianni N. 2,3-Dehydrosilybin A/B as a pro-longevity and anti-aggregation compound. Free Radic Biol Med 2017; 103:256-267. [PMID: 28039083 DOI: 10.1016/j.freeradbiomed.2016.12.042] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 12/12/2016] [Accepted: 12/27/2016] [Indexed: 02/08/2023]
Abstract
Aging is an unavoidable process characterized by gradual failure of homeostasis that constitutes a critical risk factor for several age-related disorders. It has been unveiled that manipulation of various key pathways may decelerate the aging progression and the triggering of age-related diseases. As a consequence, the identification of compounds, preferably natural-occurring, administered through diet, with lifespan-extending, anti-aggregation and anti-oxidation properties that in parallel exhibit negligible side-effects is the main goal in the battle against aging. Here we analyze the role of 2,3-dehydrosilybin A/B (DHS A/B), a minor component of silymarin used in a plethora of dietary supplements. This flavonolignan is well-known for its anti-oxidative and neuroprotective properties, among others. We demonstrate that DHS A/B confers oxidative stress resistance not only in human primary cells but also in the context of a multi-cellular aging model, namely Caenorhabditis elegans (C. elegans) where it also promotes lifespan extension. We reveal that these DHS A/B outcomes are FGT-1 and DAF-16 dependent. We additionally demonstrate the anti-aggregation properties of DHS A/B in human cells of nervous origin but also in nematode models of Alzheimer's disease (AD), eventually leading to decelerated progression of AD phenotype. Our results identify DHS A/B as the active component of silymarin extract and propose DHS A/B as a candidate anti-aging and anti-aggregation compound.
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Affiliation(s)
- Konstantina Filippopoulou
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, Greece
| | - Nikoletta Papaevgeniou
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, Greece; Institute of Nutrition, Faculty of Biology and Pharmacy, Friedrich Schiller University of Jena, 25 Dornburger Str., 07743 Jena , Germany
| | - Maria Lefaki
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, Greece
| | - Anna Paraskevopoulou
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, Greece
| | - David Biedermann
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic
| | - Vladimír Křen
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic
| | - Niki Chondrogianni
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, Greece.
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Wu Q, Qu Y, Li X, Wang D. Chromium exhibits adverse effects at environmental relevant concentrations in chronic toxicity assay system of nematode Caenorhabditis elegans. CHEMOSPHERE 2012; 87:1281-1287. [PMID: 22336735 DOI: 10.1016/j.chemosphere.2012.01.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 12/21/2011] [Accepted: 01/20/2012] [Indexed: 05/31/2023]
Abstract
Here we investigated whether the assay system (10-d) in Caenorhabditis elegans can be used to evaluate chronic toxicity of chromium (Cr(VI)) at environmental relevant concentrations ranging from 5.2 μg L(-1) to 260 μg L(-1). The results indicated that lethality, locomotion behavior as revealed by head thrash, body bend, and forward turn, metabolism as revealed by pumping rate and mean defecation cycle length, intestinal autofluorescence, and ROS production were severely altered in Cr chronically exposed nematodes at environmental relevant concentrations. The most surprising observations were that head thrash, body bend, intestinal autofluorescence, and ROS production in 13 μg L(-1) Cr exposed nematodes were significantly influenced. The observed adverse effects of Cr on survival, locomotion behavior, and metabolism were largely due to forming severe intestinal autofluorescence and ROS production. Therefore, our findings demonstrate the usefulness of chronic toxicity assay system in C. elegans in evaluating the chronic toxicity of toxicants at environmental relevant concentrations.
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Affiliation(s)
- Quili Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
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Conserved Motifs and Prediction of Regulatory Modules in Caenorhabditis elegans. G3-GENES GENOMES GENETICS 2012; 2:469-81. [PMID: 22540038 PMCID: PMC3337475 DOI: 10.1534/g3.111.001081] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Accepted: 02/06/2012] [Indexed: 01/30/2023]
Abstract
Transcriptional regulation, a primary mechanism for controlling the development of multicellular organisms, is carried out by transcription factors (TFs) that recognize and bind to their cognate binding sites. In Caenorhabditis elegans, our knowledge of which genes are regulated by which TFs, through binding to specific sites, is still very limited. To expand our knowledge about the C. elegans regulatory network, we performed a comprehensive analysis of the C. elegans, Caenorhabditis briggsae, and Caenorhabditis remanei genomes to identify regulatory elements that are conserved in all genomes. Our analysis identified 4959 elements that are significantly conserved across the genomes and that each occur multiple times within each genome, both hallmarks of functional regulatory sites. Our motifs show significant matches to known core promoter elements, TF binding sites, splice sites, and poly-A signals as well as many putative regulatory sites. Many of the motifs are significantly correlated with various types of experimental data, including gene expression patterns, tissue-specific expression patterns, and binding site location analysis as well as enrichment in specific functional classes of genes. Many can also be significantly associated with specific TFs. Combinations of motif occurrences allow us to predict the location of cis-regulatory modules and we show that many of them significantly overlap experimentally determined enhancers. We provide access to the predicted binding sites, their associated motifs, and the predicted cis-regulatory modules across the whole genome through a web-accessible database and as tracks for genome browsers.
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DNA-binding specificity and in vivo targets of Caenorhabditis elegans nuclear factor I. Proc Natl Acad Sci U S A 2009; 106:12049-54. [PMID: 19584245 DOI: 10.1073/pnas.0812894106] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The conserved nuclear factor I (NFI) family of transcription factors is unique to animals and essential for mammalian development. The Caenorhabditis elegans genome encodes a single NFI family member, whereas vertebrate genomes encode 4 distinct NFI protein subtypes (A, B, C, and X). NFI-1-deficient worms exhibit abnormalities, including reduced lifespan, defects in movement and pharyngeal pumping, and delayed egg-laying. To explore the functional basis of these phenotypes, we sought to comprehensively identify NFI-1-bound loci in C. elegans. We first established NFI-1 DNA-binding specificity using an in vitro DNA-selection strategy. Analysis yielded a consensus motif of TTGGCA(N)(3)TGCCAA, which occurs 586 times in the genome, a 100-fold higher frequency than expected. We next asked which sites were occupied by NFI-1 in vivo by performing chromatin immunoprecipitation of NFI-1 followed by microarray hybridization. Only 55 genomic locations were identified, an unexpectedly small target set. In vivo NFI-1 binding sites tend to be upstream of genes involved in core cellular processes, such as chromatin remodeling, mRNA splicing, and translation. Remarkably, 59 out of 70 (84%) of the C. briggsae orthologs of the identified targets contain conserved NFI binding sites in their promoters. These experiments provide a foundation for understanding how NFI-1 is recruited to unexpectedly few in vivo sites to perform its developmental functions, despite a vast over-representation of its binding motif.
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