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Zytner P, Kutschbach A, Gong W, Ohse VA, Taudte L, Kipp AP, Klotz LO, Priebs J, Steinbrenner H. Selenium-Enriched E. coli Bacteria Mitigate the Age-Associated Degeneration of Cholinergic Neurons in C. elegans. Antioxidants (Basel) 2024; 13:492. [PMID: 38671939 PMCID: PMC11047679 DOI: 10.3390/antiox13040492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
Selenium (Se) is an essential trace element for humans and animals, but high-dose supplementation with Se compounds, most notably selenite, may exert cytotoxic and other adverse effects. On the other hand, bacteria, including Escherichia coli (E. coli), are capable of reducing selenite to red elemental Se that may serve as a safer Se source. Here, we examined how a diet of Se-enriched E. coli bacteria affected vital parameters and age-associated neurodegeneration in the model organism Caenorhabditis elegans (C. elegans). The growth of E. coli OP50 for 48 h in medium supplemented with 1 mM sodium selenite resulted in reddening of the bacterial culture, accompanied by Se accumulation in the bacteria. Compared to nematodes supplied with the standard E. coli OP50 diet, the worms fed on Se-enriched bacteria were smaller and slimmer, even though their food intake was not diminished. Nevertheless, given the choice, the nematodes preferred the standard diet. The fecundity of the worms was not affected by the Se-enriched bacteria, even though the production of progeny was somewhat delayed. The levels of the Se-binding protein SEMO-1, which serves as a Se buffer in C. elegans, were elevated in the group fed on Se-enriched bacteria. The occurrence of knots and ruptures within the axons of cholinergic neurons was lowered in aged nematodes provided with Se-enriched bacteria. In conclusion, C. elegans fed on Se-enriched E. coli showed less age-associated neurodegeneration, as compared to nematodes supplied with the standard diet.
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Affiliation(s)
- Palina Zytner
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Anne Kutschbach
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Weiye Gong
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Verena Alexia Ohse
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Laura Taudte
- Institute of Nutritional Sciences, Department of Nutritional Physiology, Friedrich Schiller University Jena, D-07743 Jena, Germany; (L.T.); (A.P.K.)
| | - Anna Patricia Kipp
- Institute of Nutritional Sciences, Department of Nutritional Physiology, Friedrich Schiller University Jena, D-07743 Jena, Germany; (L.T.); (A.P.K.)
| | - Lars-Oliver Klotz
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Josephine Priebs
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
| | - Holger Steinbrenner
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, D-07743 Jena, Germany; (P.Z.); (A.K.); (W.G.); (V.A.O.); (L.-O.K.)
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2
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Min H, Kim J, Lee M, Kang S, Shim YH. Methionine Supplementation Alleviates the Germ Cell Apoptosis Increased by Maternal Caffeine Intake in a C. elegans Model. Nutrients 2024; 16:894. [PMID: 38542805 PMCID: PMC10974396 DOI: 10.3390/nu16060894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 03/14/2024] [Accepted: 03/17/2024] [Indexed: 04/01/2024] Open
Abstract
Caffeine (1,3,7-trimethylxanthine) is a widely consumed bioactive substance worldwide. Our recent study showed that a reduction in both reproduction and yolk protein production (vitellogenesis) caused by caffeine intake were improved by vitamin B12 supplementation, which is an essential co-factor in methionine metabolism. In the current study, we investigated the role of methionine in the reproduction of caffeine-ingested animals (CIAs). We assessed the effect of methionine metabolism on CIAs and found that caffeine intake decreased both methionine levels and essential enzymes related to the methionine cycle. Furthermore, we found that the caffeine-induced impairment of methionine metabolism decreased vitellogenesis and increased germ cell apoptosis in an LIN-35/RB-dependent manner. Interestingly, the increased germ cell apoptosis was restored to normal levels by methionine supplementation in CIAs. These results indicate that methionine supplementation plays a beneficial role in germ cell health and offspring development by regulating vitellogenesis.
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Affiliation(s)
| | | | | | | | - Yhong-Hee Shim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.M.); (J.K.); (M.L.); (S.K.)
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3
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Wolstenholme AJ, Andersen EC, Choudhary S, Ebner F, Hartmann S, Holden-Dye L, Kashyap SS, Krücken J, Martin RJ, Midha A, Nejsum P, Neveu C, Robertson AP, von Samson-Himmelstjerna G, Walker R, Wang J, Whitehead BJ, Williams PDE. Getting around the roundworms: Identifying knowledge gaps and research priorities for the ascarids. ADVANCES IN PARASITOLOGY 2024; 123:51-123. [PMID: 38448148 PMCID: PMC11143470 DOI: 10.1016/bs.apar.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
The ascarids are a large group of parasitic nematodes that infect a wide range of animal species. In humans, they cause neglected diseases of poverty; many animal parasites also cause zoonotic infections in people. Control measures include hygiene and anthelmintic treatments, but they are not always appropriate or effective and this creates a continuing need to search for better ways to reduce the human, welfare and economic costs of these infections. To this end, Le Studium Institute of Advanced Studies organized a two-day conference to identify major gaps in our understanding of ascarid parasites with a view to setting research priorities that would allow for improved control. The participants identified several key areas for future focus, comprising of advances in genomic analysis and the use of model organisms, especially Caenorhabditis elegans, a more thorough appreciation of the complexity of host-parasite (and parasite-parasite) communications, a search for novel anthelmintic drugs and the development of effective vaccines. The participants agreed to try and maintain informal links in the future that could form the basis for collaborative projects, and to co-operate to organize future meetings and workshops to promote ascarid research.
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Affiliation(s)
- Adrian J Wolstenholme
- Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Université de Tours, ISP, Nouzilly, France.
| | - Erik C Andersen
- Department of Biology, Johns Hopkins University, Baltimore, MD, United States
| | - Shivani Choudhary
- Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
| | - Friederike Ebner
- Department of Molecular Life Sciences, School of Life Sciences, Technische Universität München, Freising, Germany
| | - Susanne Hartmann
- Institute for Immunology, Freie Universität Berlin, Berlin, Germany
| | - Lindy Holden-Dye
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Sudhanva S Kashyap
- Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
| | - Jürgen Krücken
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Richard J Martin
- Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
| | - Ankur Midha
- Institute for Immunology, Freie Universität Berlin, Berlin, Germany
| | - Peter Nejsum
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Cedric Neveu
- Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Université de Tours, ISP, Nouzilly, France
| | - Alan P Robertson
- Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
| | | | - Robert Walker
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Jianbin Wang
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, TN, United States
| | | | - Paul D E Williams
- Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
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4
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Zhu X, Xia Y, Wang H, Shi L, Yin H, Gu M, Yan F. PM 2.5 induced neurotoxicity through unbalancing vitamin B12 metabolism by gut microbiota disturbance. Gut Microbes 2023; 15:2267186. [PMID: 37842922 PMCID: PMC10580859 DOI: 10.1080/19490976.2023.2267186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 10/02/2023] [Indexed: 10/17/2023] Open
Abstract
Fine particulate matter (PM2.5) in the atmosphere is easily accompanied by toxic and harmful substances, causing serious harm to human health, including cognitive impairment. Vitamin B12 (VitB12) is an essential micronutrient that is synthesized by bacteria and contributes to neurotransmitter synthesis as a nutrition and signaling molecule. However, the relationship between VitB12 attenuation of cognitive impairment and intestinal microbiota regulation in PM2.5 exposure has not been elucidated. In this study, we demonstrated that PM2.5 caused behavioral defects and neuronal damage in Caenorhabditis elegans (C. elegans), along with significant gene expression changes in neurotransmitter receptors and a decrease in VitB12 content, causing behavioral defects and neuronal damage in C. elegans. Methylcobalamin (MeCbl), a VitB12 analog, alleviated PM2.5-induced neurotoxicity in C. elegans. Moreover, using in vivo and in vitro models, we discovered that long-term exposure to PM2.5 led to changes in the structure of the gut microbiota, resulting in an imbalance of the VitB12-associated metabolic pathway followed by cognitive impairment. MeCbl supplementation could increase the diversity of the bacteria, reduce harmful substance contents, and restore the concentration of short-chain fatty acids (SCFAs) and neurotransmitters to the level of the control group to some degree. Here, a new target to mitigate the harm caused by PM2.5 was discovered, supplying MeCbl for relieving intestinal and intracellular neurotransmitter disorders. Our results also provide a reference for the use of VitB12 to target the adjustment of the human intestinal microbiota to improve metabolic disorders in people exposed to PM2.5.
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Affiliation(s)
- Xuan Zhu
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, People’s Republic of China
- Zhejiang Provincial Key Laboratory of Food Safety, Zhejiang Gongshang University, Hangzhou, China
| | - Yanting Xia
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, People’s Republic of China
| | - Huanhuan Wang
- School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou, China
- Laboratory animal center, Hangzhou Normal University, Hangzhou, China
| | - Lihua Shi
- Weifang Elbe Health Food Co. Ltd, Weifang, China
| | - Hongping Yin
- School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou, China
- Laboratory animal center, Hangzhou Normal University, Hangzhou, China
| | - Meier Gu
- School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou, China
- Laboratory animal center, Hangzhou Normal University, Hangzhou, China
| | - Fujie Yan
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
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5
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Rezaeianaran F, Gijs MAM. Difference in Intestine Content of Caenorhabditis elegans When Fed on Non-Pathogenic or Pathogenic Bacteria. MICROMACHINES 2023; 14:1386. [PMID: 37512697 PMCID: PMC10384281 DOI: 10.3390/mi14071386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023]
Abstract
We investigated the bacterial food digestion and accumulation in wild-type adult Caenorhabditis elegans (C. elegans) worms that have fed on either non-pathogenic RFP-expressing Escherichia coli (E. coli) OP50 or pathogenic-RFP-expressing Pseudomonas aeruginosa (P. aeruginosa) PAO1 during the first 4 days of adulthood. Once the worms had completed their planned feeding cycles, they were loaded on microfluidic chips, where they were fixed to allow high-resolution z-stack fluorescence imaging of their intestines utilizing a Spinning Disk Confocal Microscope (SDCM) equipped with a high-resolution oil-immersion objective (60×). IMARIS software was used to visualize and analyze the obtained images, resulting in the production of three-dimensional constructs of the intestinal bacterial load. We discovered two distinct patterns for the bacteria-derived fluorescence signal in the intestine: (i) individual fluorescent spots, originating from intact bacteria, were present in the fluorescent E. coli-OP50-fed worms, and (ii) individual fluorescent spots (originating from intact bacteria) were dispersed in large regions of diffuse fluorescence (RDF), originating from disrupted bacteria, in fluorescent P. aeruginosa-PAO1-fed worms. We performed a semi-automated single-worm-resolution quantitative analysis of the intestinal bacterial load, which showed that the intestinal bacterial load generally increases with age of the worms, but more rapidly for the fluorescent P. aeruginosa-PAO1-fed worms.
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Affiliation(s)
- Farzad Rezaeianaran
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Martin A M Gijs
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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6
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Rezaeianaran F, Gijs MAM. High-resolution imaging and analysis of the intestinal bacterial load of Caenorhabditis elegans during early adulthood. RSC Adv 2023; 13:17230-17243. [PMID: 37304789 PMCID: PMC10248764 DOI: 10.1039/d3ra02934d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 05/31/2023] [Indexed: 06/13/2023] Open
Abstract
We study the presence within the worm Caenorhabditis elegans (C. elegans) of a fluorescent strain of the worm's bacterial food (Escherichia coli (E. coli) OP50) during early adulthood. Use of a microfluidic chip based on a thin glass coverslip substrate allows investigation of the intestinal bacterial load using a Spinning Disk Confocal Microscope (SDCM) equipped with a high-resolution objective (60×). High-resolution z-stack fluorescence images of the gut bacteria in adult worms, which were loaded in the microfluidic chip and subsequently fixed, were analyzed using IMARIS software and 3D reconstructions of the intestinal bacterial load in the worms were obtained. We present an automated bivariate histogram analysis of the volumes and intensities of the bacterial spots for each worm and find that, as the worms age, the bacterial load in their hindguts increases. We show the advantage of single-worm resolution automated analysis for bacterial load studies and anticipate that the methods described in our work can be easily implemented in existing microfluidic solutions to enable thorough studies of bacterial proliferation.
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Affiliation(s)
- Farzad Rezaeianaran
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne CH-1015 Lausanne Switzerland
| | - Martin A M Gijs
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne CH-1015 Lausanne Switzerland
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7
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Wang Y, Wu W, Gong J. Live or death in cells: from micronutrition metabolism to cell fate. Front Cell Dev Biol 2023; 11:1185989. [PMID: 37250891 PMCID: PMC10213646 DOI: 10.3389/fcell.2023.1185989] [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: 03/14/2023] [Accepted: 04/28/2023] [Indexed: 05/31/2023] Open
Abstract
Micronutrients and cell death have a strong relationship and both are essential for human to maintain good body health. Dysregulation of any micronutrients causes metabolic or chronic diseases, including obesity, cardiometabolic condition, neurodegeneration, and cancer. The nematode Caenorhabditis elegans is an ideal genetic organism for researching the mechanisms of micronutrients in metabolism, healthspan, and lifespan. For example, C. elegans is a haem auxotroph, and the research of this special haem trafficking pathway contributes important reference to mammal study. Also, C. elegans characteristics including anatomy simply, clear cell lineage, well-defined genetics, and easily differentiated cell forms make it a powerful tool for studying the mechanisms of cell death including apoptosis, necrosis, autophagy, and ferroptosis. Here, we describe the understanding of micronutrient metabolism currently and also sort out the fundamental mechanisms of different kinds of cell death. A thorough understanding of these physiological processes not only builds a foundation for developing better treatments for various micronutrient disorders but also provides key insights into human health and aging.
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Affiliation(s)
- Yuting Wang
- Key Laboratory of Molecular Biophysics of MOE, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wei Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jianke Gong
- Key Laboratory of Molecular Biophysics of MOE, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
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8
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Alonzo-De la Rosa CM, Miard S, Taubert S, Picard F. Methods to extract and study the biological effects of murine gut microbiota using Caenorhabditis elegans as a screening host. PLoS One 2023; 18:e0281887. [PMID: 36821579 PMCID: PMC9949637 DOI: 10.1371/journal.pone.0281887] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 02/01/2023] [Indexed: 02/24/2023] Open
Abstract
Gut microbiota has been established as a main regulator of health. However, how changes in gut microbiota are directly associated with physiological and cellular alterations has been difficult to tackle on a large-scale basis, notably because of the cost and labor-extensive resources required for rigorous experiments in mammals. In the present study, we used the nematode Caenorhabditis elegans as a model organism to elucidate microbiota-host interactions. We developed a method to extract gut microbiota (MCB) from murine feces, and tested its potential as food source for and its impact on C. elegans biology compared to the standard bacterial diet Escherichia coli OP50. Although less preferred than OP50, MCB was not avoided but had a lower energy density (triglycerides and glucose). Consistently, MCB-fed worms exhibited smaller body length and size, lower fertility, and lower fat content than OP50-fed worms, but had a longer mean lifespan, which resembles the effects of calorie restriction in mammals. However, these outcomes were altered when bacteria were inactivated, suggesting an important role of symbiosis of MCB beyond nutrient source. Taken together, our findings support the effectiveness of gut MCB processing to test its effects in C. elegans. More work comparing MCB of differently treated mice or humans is required to further validate relevance to mammals before large-scale screening assays.
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Affiliation(s)
- Claudia Miriam Alonzo-De la Rosa
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
- Faculty of Pharmacy, Université Laval, Quebec, Canada
| | - Stéphanie Miard
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Stefan Taubert
- British Columbia Children’s Hospital Research Institute, Vancouver, Canada
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, Canada
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Frédéric Picard
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
- Faculty of Pharmacy, Université Laval, Quebec, Canada
- * E-mail:
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9
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A new AMPK isoform mediates glucose-restriction induced longevity non-cell autonomously by promoting membrane fluidity. Nat Commun 2023; 14:288. [PMID: 36653384 PMCID: PMC9849402 DOI: 10.1038/s41467-023-35952-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 01/10/2023] [Indexed: 01/19/2023] Open
Abstract
Dietary restriction (DR) delays aging and the onset of age-associated diseases. However, it is yet to be determined whether and how restriction of specific nutrients promote longevity. Previous genome-wide screens isolated several Escherichia coli mutants that extended lifespan of Caenorhabditis elegans. Here, using 1H-NMR metabolite analyses and inter-species genetics, we demonstrate that E. coli mutants depleted of intracellular glucose extend C. elegans lifespans, serving as bona fide glucose-restricted (GR) diets. Unlike general DR, GR diets don't reduce the fecundity of animals, while still improving stress resistance and ameliorating neuro-degenerative pathologies of Aβ42. Interestingly, AAK-2a, a new AMPK isoform, is necessary and sufficient for GR-induced longevity. AAK-2a functions exclusively in neurons to modulate GR-mediated longevity via neuropeptide signaling. Last, we find that GR/AAK-2a prolongs longevity through PAQR-2/NHR-49/Δ9 desaturases by promoting membrane fluidity in peripheral tissues. Together, our studies identify the molecular mechanisms underlying prolonged longevity by glucose specific restriction in the context of whole animals.
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10
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Meng X, Zheng J, Wang F, Zheng J, Yang D. Dietary fiber chemical structure determined gut microbiota dynamics. IMETA 2022; 1:e64. [PMID: 38867894 PMCID: PMC10989905 DOI: 10.1002/imt2.64] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/13/2022] [Accepted: 11/06/2022] [Indexed: 06/14/2024]
Abstract
Precision modulation of gut microbiota requires elucidation of the relation between dietary fiber intake and gut microbe dynamics. However, current studies on this aspect are few due to many technical limitations. Here, we used Caenorhabditis elegans to minimize the complicated host-microbial factors and to find the relation between dietary fiber chemical structures and gut microbiota dynamics. The Allium schoenoprasum polysaccharide (AssP) structure was elucidated and used as the complex dietary fiber against the simple fiber inulin. In vitro bacterial growth and genome analysis indicated that AssP supports bacterial growth better than inulin, while in vivo gut microbiota analysis of C. elegans fed with AssP showed that microbiota richness increased significantly compared with those fed with inulin. It is concluded that the more complex the dietary fiber chemical structure, the more gut bacteria growth it supports. Together with the community bacterial interactions that alter their abundances in vivo, these factors regulate gut microbiota synergistically.
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Affiliation(s)
- Xin Meng
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional EngineeringChina Agricultural UniversityBeijingChina
| | - Jun Zheng
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional EngineeringChina Agricultural UniversityBeijingChina
| | - Fengqiao Wang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional EngineeringChina Agricultural UniversityBeijingChina
| | - Jie Zheng
- Center for Food Safety and Applied NutritionU.S. Food and Drug AdministrationCollege ParkMarylandUSA
| | - Dong Yang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional EngineeringChina Agricultural UniversityBeijingChina
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11
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Winter AD, Tjahjono E, Beltrán LJ, Johnstone IL, Bulleid NJ, Page AP. Dietary-derived vitamin B12 protects Caenorhabditis elegans from thiol-reducing agents. BMC Biol 2022; 20:228. [PMID: 36209095 PMCID: PMC9548181 DOI: 10.1186/s12915-022-01415-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 09/20/2022] [Indexed: 11/24/2022] Open
Abstract
Background One-carbon metabolism, which includes the folate and methionine cycles, involves the transfer of methyl groups which are then utilised as a part of multiple physiological processes including redox defence. During the methionine cycle, the vitamin B12-dependent enzyme methionine synthetase converts homocysteine to methionine. The enzyme S-adenosylmethionine (SAM) synthetase then uses methionine in the production of the reactive methyl carrier SAM. SAM-binding methyltransferases then utilise SAM as a cofactor to methylate proteins, small molecules, lipids, and nucleic acids. Results We describe a novel SAM methyltransferase, RIPS-1, which was the single gene identified from forward genetic screens in Caenorhabditis elegans looking for resistance to lethal concentrations of the thiol-reducing agent dithiothreitol (DTT). As well as RIPS-1 mutation, we show that in wild-type worms, DTT toxicity can be overcome by modulating vitamin B12 levels, either by using growth media and/or bacterial food that provide higher levels of vitamin B12 or by vitamin B12 supplementation. We show that active methionine synthetase is required for vitamin B12-mediated DTT resistance in wild types but is not required for resistance resulting from RIPS-1 mutation and that susceptibility to DTT is partially suppressed by methionine supplementation. A targeted RNAi modifier screen identified the mitochondrial enzyme methylmalonyl-CoA epimerase as a strong genetic enhancer of DTT resistance in a RIPS-1 mutant. We show that RIPS-1 is expressed in the intestinal and hypodermal tissues of the nematode and that treating with DTT, β-mercaptoethanol, or hydrogen sulfide induces RIPS-1 expression. We demonstrate that RIPS-1 expression is controlled by the hypoxia-inducible factor pathway and that homologues of RIPS-1 are found in a small subset of eukaryotes and bacteria, many of which can adapt to fluctuations in environmental oxygen levels. Conclusions This work highlights the central importance of dietary vitamin B12 in normal metabolic processes in C. elegans, defines a new role for this vitamin in countering reductive stress, and identifies RIPS-1 as a novel methyltransferase in the methionine cycle. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-022-01415-y.
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Affiliation(s)
- Alan D Winter
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, G61 1QH, UK
| | - Elissa Tjahjono
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, G61 1QH, UK
| | - Leonardo J Beltrán
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, G61 1QH, UK
| | - Iain L Johnstone
- School of Molecular Biosciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Neil J Bulleid
- School of Molecular Biosciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Antony P Page
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, G61 1QH, UK.
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12
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Axenic Culture of Caenorhabditis elegans Alters Lysosomal/Proteasomal Balance and Increases Neuropeptide Expression. Int J Mol Sci 2022; 23:ijms231911517. [PMID: 36232823 PMCID: PMC9570027 DOI: 10.3390/ijms231911517] [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: 08/31/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/21/2022] Open
Abstract
Axenically cultured C. elegans show many characteristic traits of worms subjected to dietary restriction, such as slowed development, reduced fertility, and increased stress resistance. Hence, the term axenic dietary restriction (ADR) is often applied. ADR dramatically extends the worm lifespan compared to other DR regimens such as bacterial dilution. However, the underlying molecular mechanisms still remain unclear. The primary goal of this study is to comprehensively investigate transcriptional alterations that occur when worms are subjected to ADR and to estimate the molecular and physiological changes that may underlie ADR-induced longevity. One of the most enriched clusters of up-regulated genes under ADR conditions is linked to lysosomal activity, while proteasomal genes are significantly down-regulated. The up-regulation of genes specifically involved in amino acid metabolism is likely a response to the high peptide levels found in axenic culture medium. Genes related to the integrity and function of muscles and the extracellular matrix are also up-regulated. Consistent down-regulation of genes involved in DNA replication and repair may reflect the reduced fertility phenotype of ADR worms. Neuropeptide genes are found to be largely up-regulated, suggesting a possible involvement of neuroendocrinal signaling in ADR-induced longevity. In conclusion, axenically cultured worms seem to rely on increased amino acid catabolism, relocate protein breakdown from the cytosol to the lysosomes, and do not invest in DNA maintenance but rather retain muscle integrity and the extracellular matrix. All these changes may be coordinated by peptidergic signaling.
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13
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Bacterial diet modulates tamoxifen-induced death via host fatty acid metabolism. Nat Commun 2022; 13:5595. [PMID: 36151093 PMCID: PMC9508336 DOI: 10.1038/s41467-022-33299-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 09/06/2022] [Indexed: 11/18/2022] Open
Abstract
Tamoxifen is a selective estrogen receptor (ER) modulator that is used to treat ER-positive breast cancer, but that at high doses kills both ER-positive and ER-negative breast cancer cells. We recapitulate this off-target effect in Caenorhabditis elegans, which does not have an ER ortholog. We find that different bacteria dramatically modulate tamoxifen toxicity in C. elegans, with a three-order of magnitude difference between animals fed Escherichia coli, Comamonas aquatica, and Bacillus subtilis. Remarkably, host fatty acid (FA) biosynthesis mitigates tamoxifen toxicity, and different bacteria provide the animal with different FAs, resulting in distinct FA profiles. Surprisingly these bacteria modulate tamoxifen toxicity by different death mechanisms, some of which are modulated by FA supplementation and others by antioxidants. Together, this work reveals a complex interplay between microbiota, FA metabolism and tamoxifen toxicity that may provide a blueprint for similar studies in more complex mammals. Here, Diot et al. use the nematode Caenorhabditis elegans as a model to identify off-target toxicity mechanisms for tamoxifen, and find that these include fatty acid metabolism and cell death, which can be modulated by different bacterial species.
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14
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Alterations in Bacterial Metabolism Contribute to the Lifespan Extension Exerted by Guarana in Caenorhabditis elegans. Nutrients 2022; 14:nu14091986. [PMID: 35565952 PMCID: PMC9105138 DOI: 10.3390/nu14091986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 02/06/2023] Open
Abstract
Guarana (Paullinia cupana) is a widely consumed nutraceutical with various health benefits supported by scientific evidence. However, its indirect health impacts through the gut microbiota have not been studied. Caenorhabditis elegans is a useful model to study both the direct and indirect effects of nutraceuticals, as the intimate association of the worm with the metabolites produced by Escherichia coli is a prototypic simplified model of our gut microbiota. We prepared an ethanoic extract of guarana seeds and assessed its antioxidant capacity in vitro, with a 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, and in vivo, utilizing C. elegans. Additionally, we studied the impact of this extract on C. elegans lifespan, utilizing both viable and non-viable E. coli, and assessed the impact of guarana on E. coli folate production. The extract showed high antioxidant capacity, and it extended worm lifespan. However, the antioxidant and life-extending effects did not correlate in terms of the extract concentration. The extract-induced life extension was also less significant when utilizing dead E. coli, which may indicate that the effects of guarana on the worms work partly through modifications on E. coli metabolism. Following this observation, guarana was found to decrease E. coli folate production, revealing one possible route for its beneficial effects.
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15
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McDonagh A, Crew J, van der Linden AM. Dietary vitamin B12 regulates chemosensory receptor gene expression via the MEF2 transcription factor in Caenorhabditis elegans. G3 (BETHESDA, MD.) 2022; 12:6580222. [PMID: 35512190 PMCID: PMC9157118 DOI: 10.1093/g3journal/jkac107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 04/24/2022] [Indexed: 02/02/2023]
Abstract
Dynamic changes in chemoreceptor gene expression levels in sensory neurons are one strategy that an animal can use to modify their responses to dietary changes. However, the mechanisms underlying diet-dependent modulation of chemosensory gene expression are unclear. Here, we show that the expression of the srh-234 chemoreceptor gene localized in a single ADL sensory neuron type of Caenorhabditis elegans is downregulated when animals are fed a Comamonas aquatica bacterial diet, but not on an Escherichia coli diet. Remarkably, this diet-modulated effect on srh-234 expression is dependent on the micronutrient vitamin B12 endogenously produced by Comamonas aq. bacteria. Excess propionate and genetic perturbations in the canonical and shunt propionate breakdown pathways are able to override the repressive effects of vitamin B12 on srh-234 expression. The vitamin B12-mediated regulation of srh-234 expression levels in ADL requires the MEF-2 MADS domain transcription factor, providing a potential mechanism by which dietary vitamin B12 may transcriptionally tune individual chemoreceptor genes in a single sensory neuron type, which in turn may change animal responses to biologically relevant chemicals in their diet.
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Affiliation(s)
- Aja McDonagh
- Department of Biology, University of Nevada, Reno, NV 89557, USA
| | - Jeannette Crew
- Department of Biology, University of Nevada, Reno, NV 89557, USA
| | - Alexander M van der Linden
- Department of Biology, University of Nevada, Reno, NV 89557, USA,Corresponding author: Department of Biology, University of Nevada, Reno, NV 89557, USA.
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16
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Lo WS, Sommer RJ. Vitamin B 12 and predatory behavior in nematodes. VITAMINS AND HORMONES 2022; 119:471-489. [PMID: 35337632 DOI: 10.1016/bs.vh.2022.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The round worms or nematodes are the largest phylum of animals with an estimated species number of more than one million. Nematodes have invaded all ecosystems and are known from all continents including Antarctica. Parasitic species infest plants, animals and humans often with high host-specificity. Free-living species are known from marine, fresh water and soil systems, the latter of which contain many culturable species. This includes Caenorhabditis elegans, a species that was developed as one of the most prominent model systems in modern biology since the 1960ies. Pristionchus pacificus is a second nematode model organism that can easily be cultured in the laboratory. This species shows a number of complex traits including omnivorous feeding and the capability of predation on other nematodes. Predation depends on the formation of teeth-like denticles in the mouth of P. pacificus, structures unknown from C. elegans and most other nematodes. Here, we review the current knowledge about the role of vitamin B12 for the predatory behavior in P. pacificus and correlate its role with that on the physiology and development in C. elegans.
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Affiliation(s)
- Wen-Sui Lo
- Max Planck Institute for Biology Tübingen, Tübingen, Germany
| | - Ralf J Sommer
- Max Planck Institute for Biology Tübingen, Tübingen, Germany.
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17
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Ma X, Hou M, Liu C, Li J, Ba Q, Wang H. Cadmium accelerates bacterial oleic acid production to promote fat accumulation in Caenorhabditis elegans. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126723. [PMID: 34325294 DOI: 10.1016/j.jhazmat.2021.126723] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/30/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
Environmental cadmium, with a high dietary intake and long biological half-life, is a severe health risk by harming physiological function directly or through gut microbiota. However, the toxicity mechanisms of environmental cadmium on microbes and host systems remain unclear. Herein, we established three C. elegans and E. coli cultivated systems to investigate the vital role of microorganisms in cadmium-induced lipid toxicity and depict the interaction between environmental cadmium, bacteria, and the host. We found that only nematodes in the system with live bacteria, rather than UV-killed bacteria or no bacteria, could be induced to fat accumulation by cadmium exposure, suggesting that bacteria mediated the effect of environmental cadmium on body fat. Cadmium caused perturbation of metabolite in bacteria, most notably oleic acid, elevated the synthesis genes expression, and enhanced the bacterial oleic acid production, which further promoted the expression of lipid metabolism-related genes and fat deposition in C. elegans regardless of the cultivated system. Finally, we showed the potential protective effect of Vitamin D3 which prevented cadmium- or oleic acid-induced fat storage significantly. In conclusion, this study illustrates the mechanism underlying cadmium-induced lipid accumulation in body through bacterial metabolites and reveals the interplay between environmental cadmium, microorganisms, and the host.
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Affiliation(s)
- Xueqi Ma
- CAS Key Laboratory of Nutrition, Metabolism and Food safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200025, China; School of Life Science and Technology, ShanghaiTech University, Shanghai 200025, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Hou
- State Key Laboratory of Oncogenes and Related Genes, Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Chaobao Liu
- CAS Key Laboratory of Nutrition, Metabolism and Food safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200025, China
| | - Jingquan Li
- State Key Laboratory of Oncogenes and Related Genes, Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Qian Ba
- State Key Laboratory of Oncogenes and Related Genes, Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| | - Hui Wang
- CAS Key Laboratory of Nutrition, Metabolism and Food safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200025, China; State Key Laboratory of Oncogenes and Related Genes, Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
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18
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Nair T, Chakraborty R, Singh P, Rahman SS, Bhaskar AK, Sengupta S, Mukhopadhyay A. Adaptive capacity to dietary Vitamin B12 levels is maintained by a gene-diet interaction that ensures optimal life span. Aging Cell 2022; 21:e13518. [PMID: 35032420 PMCID: PMC8761004 DOI: 10.1111/acel.13518] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/16/2021] [Accepted: 11/02/2021] [Indexed: 11/28/2022] Open
Abstract
Diet regulates complex life-history traits such as longevity. For optimal lifespan, organisms employ intricate adaptive mechanisms whose molecular underpinnings are less known. We show that Caenorhabditis elegans FLR-4 kinase prevents lifespan differentials on the bacterial diet having higher Vitamin B12 levels. The flr-4 mutants are more responsive to the higher B12 levels of Escherichia coli HT115 diet, and consequently, have enhanced flux through the one-carbon cycle. Mechanistically, a higher level of B12 transcriptionally downregulates the phosphoethanolamine methyltransferase pmt-2 gene, which modulates phosphatidylcholine (PC) levels. Pmt-2 downregulation activates cytoprotective gene expression through the p38-MAPK pathway, leading to increased lifespan only in the mutant. Evidently, preventing bacterial B12 uptake or inhibiting one-carbon metabolism reverses all the above phenotypes. Conversely, supplementation of B12 to E. coli OP50 or genetically reducing PC levels in the OP50-fed mutant extends lifespan. Together, we reveal how worms maintain adaptive capacity to diets having varying micronutrient content to ensure a normal lifespan.
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Affiliation(s)
- Tripti Nair
- Molecular Aging LaboratoryNational Institute of ImmunologyNew DelhiIndia
| | - Rahul Chakraborty
- CSIR‐Institute of Genomics and Integrative BiologyNew DelhiIndia
- Academy of Scientific and Innovative Research (AcSIR)GhaziabadIndia
| | - Praveen Singh
- CSIR‐Institute of Genomics and Integrative BiologyNew DelhiIndia
- Academy of Scientific and Innovative Research (AcSIR)GhaziabadIndia
| | | | - Akash Kumar Bhaskar
- CSIR‐Institute of Genomics and Integrative BiologyNew DelhiIndia
- Academy of Scientific and Innovative Research (AcSIR)GhaziabadIndia
| | | | - Arnab Mukhopadhyay
- Molecular Aging LaboratoryNational Institute of ImmunologyNew DelhiIndia
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19
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Walker MD, Giese GE, Holdorf AD, Bhattacharya S, Diot C, García-González AP, Horowitz BB, Lee YU, Leland T, Li X, Mirza Z, Na H, Nanda S, Ponomarova O, Zhang H, Zhang J, Yilmaz LS, Walhout AJM. WormPaths: Caenorhabditis elegans metabolic pathway annotation and visualization. Genetics 2021; 219:iyab089. [PMID: 34117752 PMCID: PMC8864737 DOI: 10.1093/genetics/iyab089] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 05/28/2021] [Indexed: 11/29/2022] Open
Abstract
In our group, we aim to understand metabolism in the nematode Caenorhabditis elegans and its relationships with gene expression, physiology, and the response to therapeutic drugs. Visualization of the metabolic pathways that comprise the metabolic network is extremely useful for interpreting a wide variety of experiments. Detailed annotated metabolic pathway maps for C. elegans are mostly limited to pan-organismal maps, many with incomplete or inaccurate pathway and enzyme annotations. Here, we present WormPaths, which is composed of two parts: (1) the careful manual annotation of metabolic genes into pathways, categories, and levels, and (2) 62 pathway maps that include metabolites, metabolite structures, genes, reactions, and pathway connections between maps. These maps are available on the WormFlux website. We show that WormPaths provides easy-to-navigate maps and that the different levels in WormPaths can be used for metabolic pathway enrichment analysis of transcriptomic data. In the future, we envision further developing these maps to be more interactive, analogous to road maps that are available on mobile devices.
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Affiliation(s)
- Melissa D Walker
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Gabrielle E Giese
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Amy D Holdorf
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Sushila Bhattacharya
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Cédric Diot
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Aurian P García-González
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Brent B Horowitz
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Yong-Uk Lee
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Thomas Leland
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Xuhang Li
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Zeynep Mirza
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Huimin Na
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Shivani Nanda
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Olga Ponomarova
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Hefei Zhang
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Jingyan Zhang
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - L Safak Yilmaz
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
| | - Albertha J M Walhout
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01609, USA
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20
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Developmental plasticity and the response to nutrient stress in Caenorhabditis elegans. Dev Biol 2021; 475:265-276. [PMID: 33549550 DOI: 10.1016/j.ydbio.2021.01.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/24/2020] [Accepted: 01/29/2021] [Indexed: 11/23/2022]
Abstract
Developmental plasticity refers the ability of an organism to adapt to various environmental stressors, one of which is nutritional stress. Caenorhabditis elegans require various nutrients to successfully progress through all the larval stages to become a reproductive adult. If nutritional criteria are not satisfied, development can slow or completely arrest. In poor growth conditions, the animal can enter various diapause stages, depending on its developmental progress. In C. elegans, there are three well-characterized diapauses: the L1 arrest, the dauer diapause, and adult reproductive diapause, each associated with drastic changes in metabolism and germline development. At the centre of these changes is AMP-activated protein kinase (AMPK). AMPK is a metabolic regulator that maintains energy homeostasis, particularly during times of nutrient stress. Without AMPK, metabolism is disrupted during dauer, leading to the rapid consumption of lipid stores as well as misregulation of metabolic enzymes, leading to reduced survival. During the L1 arrest and dauer diapause, AMPK is responsible for ensuring germline quiescence by modifying the germline chromatin landscape to maintain germ cell integrity until conditions improve. Similar to classic hormonal signalling, small RNAs also play a critical role in regulating development and behaviour in a cell non-autonomous fashion. Thus, during the challenges associated with developmental plasticity, AMPK summons an army of signalling pathways to work collectively to preserve reproductive fitness during these periods of unprecedented uncertainty.
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21
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Walker MD, Giese GE, Holdorf AD, Bhattacharya S, Diot C, García-González AP, Horowitz B, Lee YU, Leland T, Li X, Mirza Z, Na H, Nanda S, Ponomarova O, Zhang H, Zhang J, Yilmaz LS, Walhout AJ. WormPaths: Caenorhabditis elegans metabolic pathway annotation and visualization. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2020:2020.12.22.424026. [PMID: 33398287 PMCID: PMC7781331 DOI: 10.1101/2020.12.22.424026] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In our group, we aim to understand metabolism in the nematode Caenorhabditis elegans and its relationships with gene expression, physiology and the response to therapeutic drugs. On March 15, 2020, a stay-at-home order was put into effect in the state of Massachusetts, USA, to flatten the curve of the spread of the novel SARS-CoV2 virus that causes COVID-19. For biomedical researchers in our state, this meant putting a hold on experiments for nine weeks until May 18, 2020. To keep the lab engaged and productive, and to enhance communication and collaboration, we embarked on an in-lab project that we all found important but that we never had the time for: the detailed annotation and drawing of C. elegans metabolic pathways. As a result, we present WormPaths, which is composed of two parts: 1) the careful manual annotation of metabolic genes into pathways, categories and levels, and 2) 66 pathway maps that include metabolites, metabolite structures, genes, reactions, and pathway connections between maps. These maps are available on our WormFlux website. We show that WormPaths provides easy-to-navigate maps and that the different levels in WormPaths can be used for metabolic pathway enrichment analysis of transcriptomic data. In the unfortunate event of additional lockdowns, we envision further developing these maps to be more interactive, with an analogy of road maps that are available on mobile devices.
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Affiliation(s)
| | | | | | - Sushila Bhattacharya
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Cédric Diot
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Aurian P. García-González
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Brent Horowitz
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Yong-Uk Lee
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Thomas Leland
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Xuhang Li
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Zeynep Mirza
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Huimin Na
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Shivani Nanda
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Olga Ponomarova
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Hefei Zhang
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | | | - L. Safak Yilmaz
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Albertha J.M. Walhout
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
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22
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Giese GE, Walker MD, Ponomarova O, Zhang H, Li X, Minevich G, Walhout AJ. Caenorhabditis elegans methionine/S-adenosylmethionine cycle activity is sensed and adjusted by a nuclear hormone receptor. eLife 2020; 9:60259. [PMID: 33016879 PMCID: PMC7561351 DOI: 10.7554/elife.60259] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 10/02/2020] [Indexed: 01/17/2023] Open
Abstract
Vitamin B12 is an essential micronutrient that functions in two metabolic pathways: the canonical propionate breakdown pathway and the methionine/S-adenosylmethionine (Met/SAM) cycle. In Caenorhabditis elegans, low vitamin B12, or genetic perturbation of the canonical propionate breakdown pathway results in propionate accumulation and the transcriptional activation of a propionate shunt pathway. This propionate-dependent mechanism requires nhr-10 and is referred to as ‘B12-mechanism-I’. Here, we report that vitamin B12 represses the expression of Met/SAM cycle genes by a propionate-independent mechanism we refer to as ‘B12-mechanism-II’. This mechanism is activated by perturbations in the Met/SAM cycle, genetically or due to low dietary vitamin B12. B12-mechanism-II requires nhr-114 to activate Met/SAM cycle gene expression, the vitamin B12 transporter, pmp-5, and adjust influx and efflux of the cycle by activating msra-1 and repressing cbs-1, respectively. Taken together, Met/SAM cycle activity is sensed and transcriptionally adjusted to be in a tight metabolic regime.
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Affiliation(s)
- Gabrielle E Giese
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, United States
| | - Melissa D Walker
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, United States
| | - Olga Ponomarova
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, United States
| | - Hefei Zhang
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, United States
| | - Xuhang Li
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, United States
| | - Gregory Minevich
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, United States
| | - Albertha Jm Walhout
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, United States
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23
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Na H, Zdraljevic S, Tanny RE, Walhout AJM, Andersen EC. Natural variation in a glucuronosyltransferase modulates propionate sensitivity in a C. elegans propionic acidemia model. PLoS Genet 2020; 16:e1008984. [PMID: 32857789 PMCID: PMC7482840 DOI: 10.1371/journal.pgen.1008984] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 09/10/2020] [Accepted: 07/08/2020] [Indexed: 11/19/2022] Open
Abstract
Mutations in human metabolic genes can lead to rare diseases known as inborn errors of human metabolism. For instance, patients with loss-of-function mutations in either subunit of propionyl-CoA carboxylase suffer from propionic acidemia because they cannot catabolize propionate, leading to its harmful accumulation. Both the penetrance and expressivity of metabolic disorders can be modulated by genetic background. However, modifiers of these diseases are difficult to identify because of the lack of statistical power for rare diseases in human genetics. Here, we use a model of propionic acidemia in the nematode Caenorhabditis elegans to identify genetic modifiers of propionate sensitivity. Using genome-wide association (GWA) mapping across wild strains, we identify several genomic regions correlated with reduced propionate sensitivity. We find that natural variation in the putative glucuronosyltransferase GLCT-3, a homolog of human B3GAT, partly explains differences in propionate sensitivity in one of these genomic intervals. We demonstrate that loss-of-function alleles in glct-3 render the animals less sensitive to propionate. Additionally, we find that C. elegans has an expansion of the glct gene family, suggesting that the number of members of this family could influence sensitivity to excess propionate. Our findings demonstrate that natural variation in genes that are not directly associated with propionate breakdown can modulate propionate sensitivity. Our study provides a framework for using C. elegans to characterize the contributions of genetic background in models of human inborn errors in metabolism.
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Affiliation(s)
- Huimin Na
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Stefan Zdraljevic
- Department of Molecular Biosciences, Northwestern University, Evanston, IL, United States of America
| | - Robyn E. Tanny
- Department of Molecular Biosciences, Northwestern University, Evanston, IL, United States of America
| | - Albertha J. M. Walhout
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
- * E-mail: (AJMW); (ECA)
| | - Erik C. Andersen
- Department of Molecular Biosciences, Northwestern University, Evanston, IL, United States of America
- * E-mail: (AJMW); (ECA)
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Zorraquín I, Sánchez-Hernández E, Ayuda-Durán B, Silva M, González-Paramás AM, Santos-Buelga C, Moreno-Arribas MV, Bartolomé B. Current and future experimental approaches in the study of grape and wine polyphenols interacting gut microbiota. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:3789-3802. [PMID: 32167171 DOI: 10.1002/jsfa.10378] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/02/2020] [Accepted: 03/13/2020] [Indexed: 06/10/2023]
Abstract
Interactions between polyphenols and gut microbiota are indeed a major issue of current interest in food science research. Knowledge in this subject is progressing as the experimental procedures and analysis techniques do. The aim of this article is to critically review the more leading-edge approaches that have been applied so far in the study of the interactions between grape/wine polyphenols and gut microbiota. This is the case of in vitro dynamic gastrointestinal simulation models that try to mitigate the limitations of simple static models (batch culture fermentations). More complex approaches include the experimentation with animals (mice, rats, pigs, lambs and chicks) and nutritional intervention studies in humans. Main advantages and limitations as well as the most relevant findings achieved by each approach in the study of how grape/wine polyphenols can modulate the composition and/or functionality of gut microbiota, are detailed. Also, common findings obtained by the three approaches (in vitro, animal models and human nutritional interventions) such as the fact that the Firmicutes/Bacteroidetes ratio tends to decrease after the feed/intake/consumption of grape/wine polyphenols are highlighted. Additionally, a nematode (Caenorhabditis elegans) model, previously used for investigating the mechanisms of processes such as aging, neurodegeneration, oxidative stress and inflammation, is presented as an emerging approach for the study of polyphenols interacting gut microbiota. © 2020 Society of Chemical Industry.
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Affiliation(s)
| | | | - Begoña Ayuda-Durán
- Grupo de Investigación en Polifenoles, Universidad de Salamanca, Salamanca, Spain
| | - Mariana Silva
- Institute of Food Science Research (CIAL), Madrid, Spain
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25
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Lysosomal activity regulates Caenorhabditis elegans mitochondrial dynamics through vitamin B12 metabolism. Proc Natl Acad Sci U S A 2020; 117:19970-19981. [PMID: 32737159 DOI: 10.1073/pnas.2008021117] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Mitochondrial fission and fusion are highly regulated by energy demand and physiological conditions to control the production, activity, and movement of these organelles. Mitochondria are arrayed in a periodic pattern in Caenorhabditis elegans muscle, but this pattern is disrupted by mutations in the mitochondrial fission component dynamin DRP-1. Here we show that the dramatically disorganized mitochondria caused by a mitochondrial fission-defective dynamin mutation is strongly suppressed to a more periodic pattern by a second mutation in lysosomal biogenesis or acidification. Vitamin B12 is normally imported from the bacterial diet via lysosomal degradation of B12-binding proteins and transport of vitamin B12 to the mitochondrion and cytoplasm. We show that the lysosomal dysfunction induced by gene inactivations of lysosomal biogenesis or acidification factors causes vitamin B12 deficiency. Growth of the C. elegans dynamin mutant on an Escherichia coli strain with low vitamin B12 also strongly suppressed the mitochondrial fission defect. Of the two C. elegans enzymes that require B12, gene inactivation of methionine synthase suppressed the mitochondrial fission defect of a dynamin mutation. We show that lysosomal dysfunction induced mitochondrial biogenesis, which is mediated by vitamin B12 deficiency and methionine restriction. S-adenosylmethionine, the methyl donor of many methylation reactions, including histones, is synthesized from methionine by S-adenosylmethionine synthase; inactivation of the sams-1 S-adenosylmethionine synthase also suppresses the drp-1 fission defect, suggesting that vitamin B12 regulates mitochondrial biogenesis and then affects mitochondrial fission via chromatin pathways.
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26
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Kumar A, Baruah A, Tomioka M, Iino Y, Kalita MC, Khan M. Caenorhabditis elegans: a model to understand host-microbe interactions. Cell Mol Life Sci 2020; 77:1229-1249. [PMID: 31584128 PMCID: PMC11104810 DOI: 10.1007/s00018-019-03319-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 09/18/2019] [Accepted: 09/23/2019] [Indexed: 12/11/2022]
Abstract
Host-microbe interactions within the gut are fundamental to all higher organisms. Caenorhabditis elegans has been in use as a surrogate model to understand the conserved mechanisms in host-microbe interactions. Morphological and functional similarities of C. elegans gut with the human have allowed the mechanistic investigation of gut microbes and their effects on metabolism, development, reproduction, behavior, pathogenesis, immune responses and lifespan. Recent reports suggest their suitability for functional investigations of human gut bacteria, such as gut microbiota of healthy and diseased individuals. Our knowledge on the gut microbial diversity of C. elegans in their natural environment and the effect of host genetics on their core gut microbiota is important. Caenorhabditis elegans, as a model, is continuously bridging the gap in our understanding the role of genetics, environment, and dietary factors on physiology of the host.
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Affiliation(s)
- Arun Kumar
- Molecular Biology and Microbial Biotechnology Laboratory, Division of Life Sciences, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, 781035, India
| | - Aiswarya Baruah
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, 785013, India
| | - Masahiro Tomioka
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Yuichi Iino
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, 113-0033, Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Mohan C Kalita
- Department of Biotechnology, Gauhati University, Guwahati, Assam, 781014, India
| | - Mojibur Khan
- Molecular Biology and Microbial Biotechnology Laboratory, Division of Life Sciences, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, 781035, India.
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27
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Abstract
Different model systems have, over the years, contributed to our current understanding of the molecular mechanisms underpinning the various types of interaction between bacteria and their animal hosts. The genus
Photorhabdus
comprises Gram-negative insect pathogenic bacteria that are normally found as symbionts that colonize the gut of the infective juvenile stage of soil-dwelling nematodes from the family Heterorhabditis. The nematodes infect susceptible insects and release the bacteria into the insect haemolymph where the bacteria grow, resulting in the death of the insect. At this stage the nematodes feed on the bacterial biomass and, following several rounds of reproduction, the nematodes develop into infective juveniles that leave the insect cadaver in search of new hosts. Therefore
Photorhabdus
has three distinct and obligate roles to play during this life-cycle: (1)
Photorhabdus
must kill the insect host; (2)
Photorhabdus
must be capable of supporting nematode growth and development; and (3)
Photorhabdus
must be able to colonize the gut of the next generation of infective juveniles before they leave the insect cadaver. In this review I will discuss how genetic analysis has identified key genes involved in mediating, and regulating, the interaction between
Photorhabdus
and each of its invertebrate hosts. These studies have resulted in the characterization of several new families of toxins and a novel inter-kingdom signalling molecule and have also uncovered an important role for phase variation in the regulation of these different roles.
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Affiliation(s)
- David J Clarke
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
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28
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Tan K, Deng D, Ma X, Cui Y, Tian Z. Pediococcus acidilactici P25 Protected Caenorhabditis elegans against Enterotoxigenic Escherichia coli K88 Infection and Transcriptomic Analysis of Its Potential Mechanisms. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7340312. [PMID: 32337270 PMCID: PMC7150717 DOI: 10.1155/2020/7340312] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 03/11/2020] [Indexed: 02/07/2023]
Abstract
Enterotoxigenic Escherichia coli (ETEC) K88 is a zoonotic pathogen. Previous studies have shown that lactic acid bacteria (LAB) have great potential in promoting health and resisting pathogenic infections; however, relatively little research has been done on the Pediococcus genus of LAB. This study is aimed at exploring the mechanisms imparted by Pediococcus acidilactici P25 against ETEC K88 in Caenorhabditis elegans. The probiotic performance of P25 was investigated in vitro. Colonization of K88 in the intestinal tract of C. elegans and abundance of enterotoxin genes were measured. In addition, the transcriptome of C. elegans infected by K88 was analyzed. The result showed that P25 possessed the ability to produce acid, as well as high tolerances to acidic and high bile salt concentrations. Coculture revealed that the growth of ETEC K88 was significantly inhibited by the presence of P25. The median survival of C. elegans fed P25 was 2 days longer than the group infected with K88 alone (P < 0.01). At the same time, the number of colonizing K88 and the abundances of estB and elt were reduced by up to 71.70% and 2.17 times, respectively, by P25. Transcriptome data indicated that P25 affected expression of genes relative to innate immune response and upregulated the abundance of genes in multiple pathways of C. elegans, including peroxisome, longevity, and mitogen-activated protein kinase (MAPK) pathways. These results demonstrated that in the presence of P25, K88 colonization and their expression of enterotoxin genes were reduced. This was accomplished through the alteration of environmental parameters (pH and bile salt) as well as through the promotion of the innate immune response processes, increased longevity, and increased antipathogenic bacteria-related pathways. This work highlights the potential application of P. acidilactici P25 as a probiotic resistant to ETEC K88.
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Affiliation(s)
- Keqin Tan
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangzhou, China 510640
| | - Dun Deng
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangzhou, China 510640
| | - Xianyong Ma
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangzhou, China 510640
| | - Yiyan Cui
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangzhou, China 510640
| | - Zhimei Tian
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangzhou, China 510640
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29
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Maynard C, Weinkove D. Bacteria increase host micronutrient availability: mechanisms revealed by studies in C. elegans. GENES AND NUTRITION 2020; 15:4. [PMID: 32138646 PMCID: PMC7057599 DOI: 10.1186/s12263-020-00662-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 02/13/2020] [Indexed: 12/31/2022]
Abstract
Micronutrients cannot be synthesized by humans and are obtained from three different sources: diet, gut microbiota, and oral supplements. The microbiota generates significant quantities of micronutrients, but the contribution of these compounds to total uptake is unclear. The role of bacteria in the synthesis and uptake of micronutrients and supplements is widely unexplored and may have important implications for human health. The efficacy and safety of several micronutrient supplements, including folic acid, have been questioned due to some evidence of adverse effects on health. The use of the simplified animal-microbe model, Caenorhabditis elegans, and its bacterial food source, Escherichia coli, provides a controllable system to explore the underlying mechanisms by which bacterial metabolism impacts host micronutrient status. These studies have revealed mechanisms by which bacteria may increase the bioavailability of folic acid, B12, and iron. These routes of uptake interact with bacterial metabolism, with the potential to increase bacterial pathogenesis, and thus may be both beneficial and detrimental to host health.
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Affiliation(s)
- Claire Maynard
- Department of Biosciences, Durham University, Durham, UK
| | - David Weinkove
- Department of Biosciences, Durham University, Durham, UK.
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30
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Zečić A, Dhondt I, Braeckman BP. The nutritional requirements of Caenorhabditis elegans. GENES AND NUTRITION 2019; 14:15. [PMID: 31080524 PMCID: PMC6501307 DOI: 10.1186/s12263-019-0637-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/10/2019] [Indexed: 12/14/2022]
Abstract
Animals require sufficient intake of a variety of nutrients to support their development, somatic maintenance and reproduction. An adequate diet provides cell building blocks, chemical energy to drive cellular processes and essential nutrients that cannot be synthesised by the animal, or at least not in the required amounts. Dietary requirements of nematodes, including Caenorhabditis elegans have been extensively studied with the major aim to develop a chemically defined axenic medium that would support their growth and reproduction. At the same time, these studies helped elucidating important aspects of nutrition-related biochemistry and metabolism as well as the establishment of C. elegans as a powerful model in studying evolutionarily conserved pathways, and the influence of the diet on health.
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Affiliation(s)
- Aleksandra Zečić
- Department of Biology, Laboratory of Aging Physiology and Molecular Evolution, Ghent University, 9000 Ghent, Belgium
| | - Ineke Dhondt
- Department of Biology, Laboratory of Aging Physiology and Molecular Evolution, Ghent University, 9000 Ghent, Belgium
| | - Bart P Braeckman
- Department of Biology, Laboratory of Aging Physiology and Molecular Evolution, Ghent University, 9000 Ghent, Belgium
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31
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Chan JP, Wright JR, Wong HT, Ardasheva A, Brumbaugh J, McLimans C, Lamendella R. Using Bacterial Transcriptomics to Investigate Targets of Host-Bacterial Interactions in Caenorhabditis elegans. Sci Rep 2019; 9:5545. [PMID: 30944351 PMCID: PMC6447554 DOI: 10.1038/s41598-019-41452-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 03/07/2019] [Indexed: 01/01/2023] Open
Abstract
The interactions between a host and its resident microbes form complicated networks that can affect host physiology. Disentangling these host-microbe interactions can help us better understand mechanisms by which bacteria affect hosts, while also defining the integral commensal protection that host-associated microbiota offer to promote health. Here we utilize a tractable genetic model organism, Caenorhabditis elegans, to study the effects of host environments on bacterial gene expression and metabolic pathways. First, we compared the transcriptomic profiles of E. coli OP50 in vitro (on agar plates) versus in vivo (fed to C. elegans host). Our data revealed that 110 biosynthetic genes were enriched in host-associated E. coli. Several of these expressed genes code for the precursors and products needed for the synthesis of lipopolysaccharides (LPS), which are important for innate immune and stress responses, as well as pathogenicity. Secondly, we compared the transcriptomic profiles of E. coli fed to hosts with different genetic backgrounds, including the long-lived daf-2/insulin like growth factor (IGF) receptor and short lived daf-16/FOXO transcription factor mutants. We find that hosts genetics also alters bacterial metabolic pathways. Given that bacteria influence host health, this transcriptomics approach can elucidate genes mediating host aging.
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Affiliation(s)
- Jason P Chan
- Department of Biology, Juniata College, Huntingdon, PA, USA.
| | | | - Hoi Tong Wong
- Department of Biology, Juniata College, Huntingdon, PA, USA
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32
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Annibal A, Tam H, Latza C, Antebi A. Comparison of ESI-MS/MS and APCI-MS methods for the quantification of folic acid analogs in C. elegans. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:316-327. [PMID: 30675959 DOI: 10.1002/jms.4337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/17/2019] [Accepted: 01/20/2019] [Indexed: 06/09/2023]
Abstract
Folic acid (FA) plays a vital role in central metabolism, including the one carbon cycle, nucleotide, and amino acid biosynthesis. The development of sensitive, accurate analytical methods to measure FA intermediates in tissues is critical to understand their biological roles in diverse physiological and pathological contexts. Here, we developed a highly sensitive method for the simultaneous quantification of FA intermediates in the nematode Caenorhabditis elegans as a model to dissect metabolic networks. The method was further validated by analyzing the worm folate pool upon RNAi knockdown of the dihydrofolate reductase gene dhfr-1. Comparative mass spectrometry behavior of the FA analogs using two different ion sources, electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI), revealed ESI-MS/MS to be more sensitive, but APCI-MS provided more detailed structure inferences, which can elucidate chemical investigation and synthesis of FA analogs. Finally, we report on the use of in vitro oxidation coupled with high-resolution mass spectrometry as a tool to discover new endogenous FA derivatives in the nematode.
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Affiliation(s)
- Andrea Annibal
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Hannah Tam
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Christian Latza
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Adam Antebi
- Max Planck Institute for Biology of Ageing, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
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33
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Revtovich AV, Lee R, Kirienko NV. Interplay between mitochondria and diet mediates pathogen and stress resistance in Caenorhabditis elegans. PLoS Genet 2019; 15:e1008011. [PMID: 30865620 PMCID: PMC6415812 DOI: 10.1371/journal.pgen.1008011] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 02/09/2019] [Indexed: 12/22/2022] Open
Abstract
Diet is a crucial determinant of organismal biology; interactions between the host, its diet, and its microbiota are critical to determining the health of an organism. A variety of genetic and biochemical means were used to assay stress sensitivity in C. elegans reared on two standard laboratory diets: E. coli OP50, the most commonly used food for C. elegans, or E. coli HT115, which is typically used for RNAi-mediated gene knockdown. We demonstrated that the relatively subtle shift to a diet of E. coli HT115 had a dramatic impact on C. elegans's survival after exposure to pathogenic or abiotic stresses. Interestingly, this was independent of canonical host defense pathways. Instead the change arises from improvements in mitochondrial health, likely due to alleviation of a vitamin B12 deficiency exhibited by worms reared on an E. coli OP50 diet. Increasing B12 availability, by feeding on E. coli HT115, supplementing E. coli OP50 with exogenous vitamin B12, or overexpression of the B12 transporter, improved mitochondrial homeostasis and increased resistance. Loss of the methylmalonyl-CoA mutase gene mmcm-1/MUT, which requires vitamin B12 as a cofactor, abolished these improvements, establishing a genetic basis for the E. coli OP50-incurred sensitivity. Our study forges a mechanistic link between a dietary deficiency (nutrition/microbiota) and a physiological consequence (host sensitivity), using the host-microbiota-diet framework.
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Affiliation(s)
- Alexey V. Revtovich
- Department of BioSciences, Rice University, Houston TX, United States of America
| | - Ryan Lee
- Department of BioSciences, Rice University, Houston TX, United States of America
| | - Natalia V. Kirienko
- Department of BioSciences, Rice University, Houston TX, United States of America
- * E-mail:
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34
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Rodríguez Amor D, Dal Bello M. Bottom-Up Approaches to Synthetic Cooperation in Microbial Communities. Life (Basel) 2019; 9:E22. [PMID: 30813538 PMCID: PMC6462982 DOI: 10.3390/life9010022] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/01/2019] [Accepted: 02/14/2019] [Indexed: 12/25/2022] Open
Abstract
Microbial cooperation pervades ecological scales, from single-species populations to host-associated microbiomes. Understanding the mechanisms promoting the stability of cooperation against potential threats by cheaters is a major question that only recently has been approached experimentally. Synthetic biology has helped to uncover some of these basic mechanisms, which were to some extent anticipated by theoretical predictions. Moreover, synthetic cooperation is a promising lead towards the engineering of novel functions and enhanced productivity of microbial communities. Here, we review recent progress on engineered cooperation in microbial ecosystems. We focus on bottom-up approaches that help to better understand cooperation at the population level, progressively addressing the challenges of tackling higher degrees of complexity: spatial structure, multispecies communities, and host-associated microbiomes. We envisage cooperation as a key ingredient in engineering complex microbial ecosystems.
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Affiliation(s)
- Daniel Rodríguez Amor
- Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Martina Dal Bello
- Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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35
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Berg M, Monnin D, Cho J, Nelson L, Crits-Christoph A, Shapira M. TGFβ/BMP immune signaling affects abundance and function of C. elegans gut commensals. Nat Commun 2019; 10:604. [PMID: 30723205 PMCID: PMC6363772 DOI: 10.1038/s41467-019-08379-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 12/20/2018] [Indexed: 01/12/2023] Open
Abstract
The gut microbiota contributes to host health and fitness, and imbalances in its composition are associated with pathology. However, what shapes microbiota composition is not clear, in particular the role of genetic factors. Previous work in Caenorhabditis elegans defined a characteristic worm gut microbiota significantly influenced by host genetics. The current work explores the role of central regulators of host immunity and stress resistance, employing qPCR and CFU counts to measure abundance of core microbiota taxa in mutants raised on synthetic communities of previously-isolated worm gut commensals. This revealed a bloom, specifically of Enterobacter species, in immune-compromised TGFβ/BMP mutants. Imaging of fluorescently labeled Enterobacter showed that TGFβ/BMP-exerted control operated primarily in the anterior gut and depended on multi-tissue contributions. Enterobacter commensals are common in the worm gut, contributing to infection resistance. However, disruption of TGFβ/BMP signaling turned a normally beneficial Enterobacter commensal to pathogenic. These results demonstrate specificity in gene-microbe interactions underlying gut microbial homeostasis and highlight the pathogenic potential of their disruption.
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Affiliation(s)
- Maureen Berg
- Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA
| | - David Monnin
- Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA
| | - Juhyun Cho
- Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA
| | - Lydia Nelson
- Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA
| | - Alex Crits-Christoph
- Graduate Group in Microbiology, University of California, Berkeley, CA, 94720, USA
| | - Michael Shapira
- Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA.
- Graduate Group in Microbiology, University of California, Berkeley, CA, 94720, USA.
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36
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Elkabti AB, Issi L, Rao RP. Caenorhabditis elegans as a Model Host to Monitor the Candida Infection Processes. J Fungi (Basel) 2018; 4:E123. [PMID: 30405043 PMCID: PMC6309157 DOI: 10.3390/jof4040123] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 10/31/2018] [Accepted: 11/01/2018] [Indexed: 02/07/2023] Open
Abstract
C. elegans has several advantages as an experimental host for the study of infectious diseases. Worms are easily maintained and propagated on bacterial lawns. The worms can be frozen for long term storage and still maintain viability years later. Their short generation time and large brood size of thousands of worms grown on a single petri dish, makes it relatively easy to maintain at a low cost. The typical wild type adult worm grows to approximately 1.5 mm in length and are transparent, allowing for the identification of several internal organs using an affordable dissecting microscope. A large collection of loss of function mutant strains are readily available from the C. elegans genetic stock center, making targeted genetic studies in the nematode possible. Here we describe ways in which this facile model host has been used to study Candida albicans, an opportunistic fungal pathogen that poses a serious public health threat.
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Affiliation(s)
| | - Luca Issi
- Worcester Polytechnic Institute, Worcester, MA 01609, USA.
| | - Reeta P Rao
- Worcester Polytechnic Institute, Worcester, MA 01609, USA.
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37
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Machado ML, Arantes LP, Gubert P, Zamberlan DC, da Silva TC, da Silveira TL, Boligon A, Soares FAA. Ilex paraguariensis modulates fat metabolism in Caenorhabditis elegans through purinergic system (ADOR-1) and nuclear hormone receptor (NHR-49) pathways. PLoS One 2018; 13:e0204023. [PMID: 30252861 PMCID: PMC6155532 DOI: 10.1371/journal.pone.0204023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 09/01/2018] [Indexed: 11/30/2022] Open
Abstract
Ilex paraguariensis is a well-known plant that is widely consumed in South America, primarily as a drink called mate. Mate is described to have stimulant and medicinal properties. Considering the potential anti-lipid effects of I. paraguariensis infusion, we used an extract of this plant as a possible modulator of fat storage to control lipid metabolism in worms. Herein, the I. paraguariensis-dependent modulation of fat metabolism in Caenorhabditis elegans was investigated. C. elegans were treated with I. paraguariensis aqueous extract (1 mg/ml) from L1 larvae stage until adulthood, to simulate the primary form of consumption. Expression of adipocyte triglyceride lipase 1 (ATGL-1) and heat shock protein 16.2, lipid accumulation through C1-BODIPY-C12 (BODIPY) lipid staining, behavioral parameters, body length, total body energy expenditure and overall survival were analyzed. Total body energy expenditure was determined by the oxygen consumption rate in N2, nuclear hormone receptor knockout, nhr-49(nr2041), and adenosine receptor knockout, ador-1(ox489) strains. Ilex paraguariensis extract increased ATGL-1 expression 20.06% and decreased intestinal BODIPY fat staining 63.36%, compared with the respective control group, without affecting bacterial growth and energetic balance, while nhr-49(nr2041) and ador-1(ox489) strains blocked the worm fat loss. In addition, I. paraguariensis increased the oxygen consumption in N2 worms, but not in mutant strains, increased N2 worm survival following juglone exposure, and did not alter hsp-16.2 expression. We demonstrate for the first time that I. paraguariensis can decrease fat storage and increase body energy expenditure in worms. These effects depend on the purinergic system (ADOR-1) and NHR-49 pathways. Ilex paraguariensis upregulated the expression of ATGL-1 to modulate fat metabolism. Furthermore, our data corroborates with other studies that demonstrate that C. elegans is a useful tool for studies of fat metabolism and energy consumption.
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Affiliation(s)
- Marina Lopes Machado
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Leticia Priscilla Arantes
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Priscila Gubert
- Centro de Ciências Biológicas e da Saúde, Campus Reitor Edgard Santos, Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Daniele Coradini Zamberlan
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Thayanara Cruz da Silva
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Tássia Limana da Silveira
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Aline Boligon
- Departamento da Farmácia Industrial, Laboratório de Pesquisa Fitoquímica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Félix Alexandre Antunes Soares
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
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A novel gene-diet pair modulates C. elegans aging. PLoS Genet 2018; 14:e1007608. [PMID: 30125273 PMCID: PMC6117094 DOI: 10.1371/journal.pgen.1007608] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 08/30/2018] [Accepted: 08/02/2018] [Indexed: 12/26/2022] Open
Abstract
Diet profoundly affects metabolism and incidences of age-related diseases. Animals adapt their physiology to different food-types, modulating complex life-history traits like aging. The molecular mechanisms linking adaptive capacity to diet with aging are less known. We identify FLR-4 kinase as a novel modulator of aging in C. elegans, depending on bacterial diet. FLR-4 functions to prevent differential activation of the p38MAPK pathway in response to diverse food-types, thereby maintaining normal life span. In a kinase-dead flr-4 mutant, E. coli HT115 (K12 strain), but not the standard diet OP50 (B strain), is able to activate p38MAPK, elevate expression of cytoprotective genes through the nuclear hormone receptor NHR-8 and enhance life span. Interestingly, flr-4 and dietary restriction utilize similar pathways for longevity assurance, suggesting cross-talks between cellular modules that respond to diet quality and quantity. Together, our study discovers a new C. elegans gene-diet pair that controls the plasticity of aging. For animals living in the wild, being able to utilize a wide range of diet is evolutionarily advantageous as they can survive even when their optimal diet is depleted. Since diet is known to influence the rate of aging, animals seem to have evolved intricate mechanisms to maintain homeostasis and normal life span, but the molecular mechanisms are less understood. Using a small nematode, C. elegans as a model, we show that the adaptive capacity to different diet is maintained by a kinase gene. When this gene is mutated, worms start living longer on one strain of bacterial diet but not on the other. We identify the molecular cascade required for this food-type-dependent longevity. We show that this cascade of events significantly overlaps with the pathway that determine food quantity-dependent life span enhancement. Our study thus elucidates a part of the molecular monitoring system that regulates longevity dependent on the available quality and quantity of diet.
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Carreras NL, Martorell P, Chenoll E, Genovés S, Ramón D, Aleixandre A. Anti-obesity properties of the strain Bifidobacterium animalis subsp. lactis CECT 8145 in Zücker fatty rats. Benef Microbes 2018; 9:629-641. [DOI: 10.3920/bm2017.0141] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We evaluated the effect of oral administration of Bifidobacterium animalis subsp. lactis CECT 8145 strain in Zücker fatty rats. The Zücker fatty rats were randomly divided into two groups (n=10 each) and administered either B. animalis subsp. lactis CECT 8145 (1010 cfu/day) suspended in skim milk, or skim milk alone (control group). Each treatment was administered in drinking bottles from week 5 until week 17 of age. A lean Zücker rat group (standard group) was included to provide normal values for the Zücker strain. This group was administered skim milk in the drinking bottle for the same experimental period as Zücker fatty rats. Body weight gain was greater in the fatty control group than in the fatty rats treated daily with B. animalis subsp. lactis CECT 8145. Furthermore, dry and liquid food intake significantly decreased in the treated Zücker fatty group and these rats also showed decreased plasma ghrelin levels as compared with the Zücker fatty control group. B. animalis subsp. lactis CECT 8145 intake also decreased plasma tumour necrosis factor-α (a proinflammatory cytokine) and plasma malondialdehyde (a biomarker of oxidative stress). Moreover, the ratio plasma total cholesterol/plasma cholesterol transported by high-density lipoproteins, considered as an index for cardiovascular disease, also significantly decreased in the Zücker fatty rats treated with B. animalis subsp. lactis CECT 8145. By contrast, this bacterial strain significantly increased plasma adiponectin (an insulin-sensitising adipokine), but did not produce significant effects on triglyceride levels or glucose metabolism biomarkers. Although further research is required to confirm B. animalis subsp. lactis CECT 8145 is an efficient anti-obesity treatment in humans, the results obtained in this study are promising and point to the health and anti-obesity properties of this bacterial strain.
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Affiliation(s)
- N. López Carreras
- Departamento de Farmacología, Facultad de Medicina, Universidad Complutense de Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - P. Martorell
- Department of Food Biotechnology; Biópolis S.L. Parc Científic Universitat De València, Edif. 2, C/Catedrático Agustín Escardino Benlloch, 9, 46980 Paterna, Spain
| | - E. Chenoll
- Department of Food Biotechnology; Biópolis S.L. Parc Científic Universitat De València, Edif. 2, C/Catedrático Agustín Escardino Benlloch, 9, 46980 Paterna, Spain
| | - S. Genovés
- Department of Food Biotechnology; Biópolis S.L. Parc Científic Universitat De València, Edif. 2, C/Catedrático Agustín Escardino Benlloch, 9, 46980 Paterna, Spain
| | - D. Ramón
- Department of Food Biotechnology; Biópolis S.L. Parc Científic Universitat De València, Edif. 2, C/Catedrático Agustín Escardino Benlloch, 9, 46980 Paterna, Spain
| | - A. Aleixandre
- Departamento de Farmacología, Facultad de Medicina, Universidad Complutense de Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
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40
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Akduman N, Rödelsperger C, Sommer RJ. Culture-based analysis of Pristionchus-associated microbiota from beetles and figs for studying nematode-bacterial interactions. PLoS One 2018; 13:e0198018. [PMID: 29864131 PMCID: PMC5986141 DOI: 10.1371/journal.pone.0198018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 05/12/2018] [Indexed: 12/20/2022] Open
Abstract
The interplay with bacteria is of crucial importance for the interaction of multicellular organisms with their environments. Studying the associations between the nematode model organisms Caenorhabditis elegans and Pristionchus pacificus with bacteria constitutes a powerful system to investigate these interactions at a mechanistic level. P. pacificus is found in association with scarab beetles in nature and recent studies revealed the succession and dynamics of this nematode and its microbiome during the decomposition of one particular host species, the rhinoceros beetle Oryctes borbonicus on La Réunion Island. However, these studies were performed using culture-free methods, with no attempt made to establish bacterial cultures from the beetle-nematode ecosystem and to investigate the effects of these microbes on life history traits in P. pacificus. Here, we establish and characterize a collection of 136 bacterial strains that have been isolated from scarab beetles and figs, another Pristionchus-associated environment, as a resource for studying their effect on various nematode traits. Classification based on 16S sequencing identified members of four bacterial phyla with the class of Gammaproteobacteria representing the majority with 81 strains. Assessing the survival of P. pacificus on individual bacteria allowed us to propose candidate groups of pathogens such as Bacillaceae, Actinobacteria, and Serratia. In combination with chemoattraction data, it was revealed that P. pacificus is able to recognize and avoid certain groups of pathogens, but not others. Our collection of bacterial strains forms a natural resource to study the effects of bacterial diet on development and other traits. Furthermore, these results will form the basis of future studies to elucidate the molecular mechanisms of recognition and pathogenicity.
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Affiliation(s)
- Nermin Akduman
- Max Planck Institute for Developmental Biology, Department of Evolutionary Biology, Max-Planck-Ring 5, Tübingen, Germany
| | - Christian Rödelsperger
- Max Planck Institute for Developmental Biology, Department of Evolutionary Biology, Max-Planck-Ring 5, Tübingen, Germany
| | - Ralf J. Sommer
- Max Planck Institute for Developmental Biology, Department of Evolutionary Biology, Max-Planck-Ring 5, Tübingen, Germany
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41
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Lawrence AD, Nemoto-Smith E, Deery E, Baker JA, Schroeder S, Brown DG, Tullet JMA, Howard MJ, Brown IR, Smith AG, Boshoff HI, Barry CE, Warren MJ. Construction of Fluorescent Analogs to Follow the Uptake and Distribution of Cobalamin (Vitamin B 12) in Bacteria, Worms, and Plants. Cell Chem Biol 2018; 25:941-951.e6. [PMID: 29779954 DOI: 10.1016/j.chembiol.2018.04.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 01/18/2018] [Accepted: 04/11/2018] [Indexed: 12/25/2022]
Abstract
Vitamin B12 is made by only certain prokaryotes yet is required by a number of eukaryotes such as mammals, fish, birds, worms, and Protista, including algae. There is still much to learn about how this nutrient is trafficked across the domains of life. Herein, we describe ways to make a number of different corrin analogs with fluorescent groups attached to the main tetrapyrrole-derived ring. A further range of analogs were also constructed by attaching similar fluorescent groups to the ribose ring of cobalamin, thereby generating a range of complete and incomplete corrinoids to follow uptake in bacteria, worms, and plants. By using these fluorescent derivatives we were able to demonstrate that Mycobacterium tuberculosis is able to acquire both cobyric acid and cobalamin analogs, that Caenorhabditis elegans takes up only the complete corrinoid, and that seedlings of higher plants such as Lepidium sativum are also able to transport B12.
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Affiliation(s)
- Andrew D Lawrence
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Emi Nemoto-Smith
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK; National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20850, USA
| | - Evelyne Deery
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Joseph A Baker
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Susanne Schroeder
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - David G Brown
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | | | - Mark J Howard
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Ian R Brown
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Alison G Smith
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
| | - Helena I Boshoff
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20850, USA
| | - Clifton E Barry
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20850, USA
| | - Martin J Warren
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK.
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42
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Na H, Ponomarova O, Giese GE, Walhout AJM. C. elegans MRP-5 Exports Vitamin B12 from Mother to Offspring to Support Embryonic Development. Cell Rep 2018; 22:3126-3133. [PMID: 29562169 PMCID: PMC5896776 DOI: 10.1016/j.celrep.2018.02.100] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 01/05/2018] [Accepted: 02/26/2018] [Indexed: 01/16/2023] Open
Abstract
Vitamin B12 functions as a cofactor for methionine synthase to produce the anabolic methyl donor S-adenosylmethionine (SAM) and for methylmalonyl-CoA mutase to catabolize the short-chain fatty acid propionate. In the nematode Caenorhabditis elegans, maternally supplied vitamin B12 is required for the development of offspring. However, the mechanism for exporting vitamin B12 from the mother to the offspring is not yet known. Here, we use RNAi of more than 200 transporters with a vitamin B12-sensor transgene to identify the ABC transporter MRP-5 as a candidate vitamin B12 exporter. We show that the injection of vitamin B12 into the gonad of mrp-5 deficient mothers rescues embryonic lethality in the offspring. Altogether, our findings identify a maternal mechanism for the transit of an essential vitamin to support the development of the next generation.
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Affiliation(s)
- Huimin Na
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Olga Ponomarova
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Gabrielle E Giese
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Albertha J M Walhout
- Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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43
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GERBABA TEKLUK, GREEN-HARRISON LUKE, BURET ANDREG. Modeling Host-Microbiome Interactions in Caenorhabditis elegans. J Nematol 2018. [DOI: 10.21307/jofnem-2017-082] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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44
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Abstract
Understanding how the human gut microbiota might influence ageing is challenging. The gut microbiota is a hugely complex ecology of organisms that varies greatly with individuals and time, making age-related changes difficult to measure. However, elderly and younger populations do show differences in gut microbe composition. The key question is whether these differences only reflect age-related changes in host physiology and diet, or if microbes can drive host ageing? Model organisms allow this question to be addressed. Longitudinal analyses in the fruit fly Drosophila melanogaster show that changes in microbial composition precedes intestinal and host ageing, and antibiotic treatment increases lifespan, implicating microbes in accelerating ageing. Antibiotics also extend the lifespan of middle-aged killifish but additional transplantation of gut microbes from young killifish extends lifespan further, suggesting a positive effect of microbes associated with young animals. Microbes from old, but not young, mice induce inflammation when added to germ-free mice suggesting that microbes become more harmful to the host with age. These studies implicate broad classes of bacteria, particularly members of the phylum Proteobacteria, as drivers of ageing in a feed-forward loop with intestinal degradation and inflammation. The nematode Caenorhabditis elegans can be associated with single strains of genetically-tractable bacteria, and this simplified system has revealed specific interventions in bacterial metabolism, such as inhibition of bacterial folate synthesis, that extend animal lifespan. Transferring this understanding to the human microbiota is challenging but promises to reveal how manipulation of the gut microbiota might be a route to maintain health in old age.
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45
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Gerbaba TK, Green-Harrison L, Buret AG. Modeling Host-Microbiome Interactions in Caenorhabditis elegans. J Nematol 2017; 49:348-356. [PMID: 29353922 PMCID: PMC5770281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Indexed: 06/07/2023] Open
Abstract
The microbiome influences host processes including nutritional availability, development, immunity, and behavioral responses. Caenorhabditis elegans is a powerful model to study molecular mechanisms of host-microbial interactions. Recent efforts have been made to profile the natural microbiome of C. elegans, laying a foundation for mechanistic studies of host-microbiome interactions in this genetically tractable model system. Studies using single-species microbes, multi-microbial systems, and humanized worm-microbiome interaction studies reveal metabolic and microbial-microbial interactions relevant in higher organisms. This article discusses recent developments in modeling the effects of host-microbiome interactions in C. elegans.
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Affiliation(s)
- Teklu K Gerbaba
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Luke Green-Harrison
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Andre G Buret
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
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46
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Shapira M. Host–microbiota interactions in Caenorhabditis elegans and their significance. Curr Opin Microbiol 2017. [DOI: 10.1016/j.mib.2017.05.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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47
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Zanni E, Schifano E, Motta S, Sciubba F, Palleschi C, Mauri P, Perozzi G, Uccelletti D, Devirgiliis C, Miccheli A. Combination of Metabolomic and Proteomic Analysis Revealed Different Features among Lactobacillus delbrueckii Subspecies bulgaricus and lactis Strains While In Vivo Testing in the Model Organism Caenorhabditis elegans Highlighted Probiotic Properties. Front Microbiol 2017; 8:1206. [PMID: 28702021 PMCID: PMC5487477 DOI: 10.3389/fmicb.2017.01206] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 06/14/2017] [Indexed: 12/22/2022] Open
Abstract
Lactobacillus delbrueckii represents a technologically relevant member of lactic acid bacteria, since the two subspecies bulgaricus and lactis are widely associated with fermented dairy products. In the present work, we report the characterization of two commercial strains belonging to L. delbrueckii subspecies bulgaricus, lactis and a novel strain previously isolated from a traditional fermented fresh cheese. A phenomic approach was performed by combining metabolomic and proteomic analysis of the three strains, which were subsequently supplemented as food source to the model organism Caenorhabditis elegans, with the final aim to evaluate their possible probiotic effects. Restriction analysis of 16S ribosomal DNA revealed that the novel foodborne strain belonged to L. delbrueckii subspecies lactis. Proteomic and metabolomic approaches showed differences in folate, aminoacid and sugar metabolic pathways among the three strains. Moreover, evaluation of C. elegans lifespan, larval development, brood size, and bacterial colonization capacity demonstrated that L. delbrueckii subsp. bulgaricus diet exerted beneficial effects on nematodes. On the other hand, both L. delbrueckii subsp. lactis strains affected lifespan and larval development. We have characterized three strains belonging to L. delbrueckii subspecies bulgaricus and lactis highlighting their divergent origin. In particular, the two closely related isolates L. delbrueckii subspecies lactis display different galactose metabolic capabilities. Moreover, the L. delbrueckii subspecies bulgaricus strain demonstrated potential probiotic features. Combination of omic platforms coupled with in vivo screening in the simple model organism C. elegans is a powerful tool to characterize industrially relevant bacterial isolates.
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Affiliation(s)
- Elena Zanni
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of RomeRome, Italy
| | - Emily Schifano
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of RomeRome, Italy
| | - Sara Motta
- Institute of Biomedical Technologies, National Research CouncilMilan, Italy
| | - Fabio Sciubba
- Department of Chemistry, Sapienza University of RomeRome, Italy
| | - Claudio Palleschi
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of RomeRome, Italy
| | - Pierluigi Mauri
- Institute of Biomedical Technologies, National Research CouncilMilan, Italy
| | - Giuditta Perozzi
- Food and Nutrition Research Center, Council for Agricultural Research and EconomicsRome, Italy
| | - Daniela Uccelletti
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of RomeRome, Italy
| | - Chiara Devirgiliis
- Food and Nutrition Research Center, Council for Agricultural Research and EconomicsRome, Italy
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48
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Abstract
In this issue of Developmental Cell, Chaudhari and colleagues (2016) use a novel method to create an in vitro proliferative cell line from tumorous C. elegans germ cells, and in the process discover that bacterial folates act as signals for proliferation, independent of their roles as vitamins.
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Affiliation(s)
- Amy K Walker
- University of Massachusetts Medical School, 373 Plantation Street, Room 319, Worcester, MA 01605, USA.
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49
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Gao AW, Chatzispyrou IA, Kamble R, Liu YJ, Herzog K, Smith RL, van Lenthe H, Vervaart MAT, van Cruchten A, Luyf AC, van Kampen A, Pras-Raves ML, Vaz FM, Houtkooper RH. A sensitive mass spectrometry platform identifies metabolic changes of life history traits in C. elegans. Sci Rep 2017; 7:2408. [PMID: 28546536 PMCID: PMC5445081 DOI: 10.1038/s41598-017-02539-w] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 04/12/2017] [Indexed: 12/21/2022] Open
Abstract
Abnormal nutrient metabolism is a hallmark of aging, and the underlying genetic and nutritional framework is rapidly being uncovered, particularly using C. elegans as a model. However, the direct metabolic consequences of perturbations in life history of C. elegans remain to be clarified. Based on recent advances in the metabolomics field, we optimized and validated a sensitive mass spectrometry (MS) platform for identification of major metabolite classes in worms and applied it to study age and diet related changes. Using this platform that allowed detection of over 600 metabolites in a sample of 2500 worms, we observed marked changes in fatty acids, amino acids and phospholipids during worm life history, which were independent from the germ-line. Worms underwent a striking shift in lipid metabolism after early adulthood that was at least partly controlled by the metabolic regulator AAK-2/AMPK. Most amino acids peaked during development, except aspartic acid and glycine, which accumulated in aged worms. Dietary intervention also influenced worm metabolite profiles and the regulation was highly specific depending on the metabolite class. Altogether, these MS-based methods are powerful tools to perform worm metabolomics for aging and metabolism-oriented studies.
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Affiliation(s)
- Arwen W Gao
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Iliana A Chatzispyrou
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Rashmi Kamble
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Yasmine J Liu
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Katharina Herzog
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Reuben L Smith
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Henk van Lenthe
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Martin A T Vervaart
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Arno van Cruchten
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Angela C Luyf
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Antoine van Kampen
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Mia L Pras-Raves
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands.,Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Frédéric M Vaz
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Riekelt H Houtkooper
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands.
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50
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Baierle M, Göethel G, Nascimento SN, Charão MF, Moro AM, Brucker N, Sauer E, Gauer B, Souto C, Durgante J, Arbo MD, Garcia SC. DNA damage in the elderly is associated with 5-MTHF levels: a pro-oxidant activity. Toxicol Res (Camb) 2017; 6:333-341. [PMID: 30090502 PMCID: PMC6062306 DOI: 10.1039/c6tx00247a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Accepted: 03/05/2017] [Indexed: 12/31/2022] Open
Abstract
The aging phenomenon is associated with oxidative stress damage in biomolecules, especially DNA. 5-Methyltetrahydrofolate (5-MTHF), the active folate form, plays a pivotal role in maintaining genomic integrity. However, recently it was associated with cancer development. In Brazil, there are folic acid enriched foods, such as flour, making the general population chronically exposed to folates. Therefore, the aim of this study was to investigate whether erythrocytes 5-MTHF levels were associated with age-related DNA damage in two groups (elderly and young subjects). Additionally, a study in Caenorhabditis elegans, an in vivo alternative model, was performed to verify if 5-MTHF presents a pro-oxidant effect. A total of 50 elderly and 25 young subjects participated in this study, which analyzed whole blood DNA damage, plasma carbonyl proteins (PCO), and erythrocytes 5-MTHF levels. In addition, ROS and RNS production, survival rate, and lifespan were performed in C. elegans exposed to 5-MTHF. Blood 5-MTHF levels and DNA damage were increased in the elderly compared to the young group. A positive association was found between 5-MTHF levels and DNA damage, and between DNA damage and PCO levels, suggesting an oxidative cause of damage associated with the active folate form. In an experimental study it was observed that 5-MTHF increased ROS production in C. elegans, in a dose dependent manner, while survival rate and life span were not affected at the test doses. These findings suggest that 5-MTHF, the active folate form, may be involved in DNA damage in the elderly. This damage could be a result of oxidative stress, as observed in the in vivo alternative model; however, more studies are necessary to prove our present results.
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Affiliation(s)
- Marília Baierle
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Gabriela Göethel
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Sabrina N Nascimento
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Mariele F Charão
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Angela M Moro
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Natália Brucker
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Elisa Sauer
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Bruna Gauer
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Caroline Souto
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
| | - Juliano Durgante
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
| | - Marcelo Dutra Arbo
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
| | - Solange Cristina Garcia
- Laboratory of Toxicology (LATOX) , Department of Analysis , Faculty of Pharmacy , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil .
- Graduate Program in Pharmaceutical Sciences (PPGCF) , Federal University of Rio Grande do Sul , 90610000 , Porto Alegre , RS , Brazil
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