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  • 1
    Publication Date: 2022-05-25
    Description: Presented at CERF 2015: Grand Challenges in Coastal & Estuarine Science, Portland, Oregon, November 8 - 12, 2015 and at the Eighth Symposium on Harmful Algae in the U.S., Long Beach, California, November 15 – 19, 2015
    Description: A growing concern for coastal management is the choice of appropriate public or private responses to HABs as a natural hazard. Considerable efforts have been devoted to understanding the scientific aspects of HABs, including their distributions in space and time, their ecological roles, and the nature of their toxic effects, among others. Much energy also has been directed at exploring socio-economic impacts and identifying potential management actions, including actions to prevent, control, or mitigate blooms. Using blooms of Florida red tide (Karenia brevis) as a case study, we develop an approach to the choice of policy responses to K. brevis blooms. Importantly, several new types of public health, environmental, and socio-economic impacts now are beginning to be revealed, including human gastrointestinal and potential neurological illnesses; morbidities and mortalities of protected species, including manatees, cetaceans, and sea turtles; increased numbers of hospital emergency room visits for the elderly; increased respiratory morbidities in workers, such as beach lifeguards; and potential reduced K- 12 school attendance. Optimal policy responses to this hazard are likely to depend critically upon why and where a bloom occurs, its spatial and temporal scales and toxicity, and the nature of its impacts. In the face of significant ongoing scientific uncertainties, and given estimates of impacts, we find that policies to expand and stabilize scientific research programs and environmental monitoring efforts, to develop and implement education programs for both residents and tourists, and to communicate the physical aspects of blooms to the public in a timely fashion are likely optimal.
    Description: This research was sponsored by the National Science Foundation under NSF/CNH Grant No. 1009106.
    Keywords: Coupled human-nature systems ; CHANS ; HAB ; Harmful algae bloom
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 2
    Publication Date: 2022-05-25
    Description: Presented at the Eighth Symposium on Harmful Algae in the U.S., Long Beach, California, November 15 – 19, 2015
    Description: Coupled human-nature systems (CHANS) involve dynamic interactions between humans and nature, often influenced by and affecting the distinct dynamic characteristics of each component. We present an overview of an ongoing interdisciplinary research program focused on a specific type of systems that couple expanding and fluctuating human coastal populations to episodic blooms of toxic marine algae, drawing examples primarily from human interactions with blooms of the toxic dinoflagellate Karenia brevis from the eastern Gulf of Mexico (“Florida red tides”). We introduce a set of HAB Symposium “speed” presentations and associated posters based on multi-disciplinary research. Using extant, but extraordinary, data to specify empirical models, this program of research has focused on characterizing the influence of anthropogenic sources on K. brevis blooms, assessing the public health and economic impacts of these blooms in an exposure-response framework, and defining the choice of appropriate human policy responses to the hazard. We present examples of the generic aspects of CHANS systems in the context of Florida red tides, and we discuss also some of the challenges involved in compiling and analyzing the relevant data to support our positive and normative analytical efforts.
    Description: NSF/CNH NO.1009106
    Keywords: Coupled human-nature systems ; CHANS ; HAB ; Harmful algae bloom
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 3
    Publication Date: 2022-05-25
    Description: Presented at CERF 2015: Grand Challenges in Coastal & Estuarine Science, Portland, Oregon, November 8 - 12, 2015 and at the Eighth Symposium on Harmful Algae in the U.S., Long Beach, California, November 15 – 19, 2015.
    Description: The Coupled Natural and Human Systems program of US National Science Foundation is supporting our effort to elucidate linkages between harmful algal blooms and associated impacts on human health, society and economy of coastal communities. The human respiratory system is negatively impacted by inhaled toxic aerosols from the Florida red tide dinoflagellate, Karenia brevis. It has been hypothesized that surf height, wind speed, and wind direction were the predominant factors determining the amount of toxin reaching exposed individuals. Recent findings indicate that there are more environmental factors influencing the level of respiratory impacts from brevetoxins. We report on analyses that include additional factors such as air temperature, water temperature, dew point, barometric pressure, K. brevis cell counts, annd distance and direction from K. brevis cells to the individual. Factors contributing most to differences between no respiratory irritation and mild respiratory irritation were water temperature, air temperature, and dew point. Those factors contributing most to differences between mild respiratory irritation and moderate respiratory irritation were wind direction, surf conditions, and wind speed. Data on respiratory impacts was provided by the Beach Conditions Reporting System (BCRS). This system provides twice daily reports from lifeguards and park rangers at public beaches. These subjective reports include observed levels of respiratory irritation among beach-goers. Other environmental data were provided by a variety of local sources including private and public weather stations and many monitoring and research efforts. The resultant model provides a means to forecast respiratory impacts from observations of HAB distribution, and meteorological and oceanographic conditions.
    Description: ECOHAB FL – NA06NOS478024; NSF Coupled Human and Natural Systems - # 1009106; Research Experience for Undergraduates - # 0453955; FWCC – FL Red Tide Cooperative Agreements
    Keywords: Florida Red Tide ; Harmful algae bloom ; HAB
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 4
    Publication Date: 2022-05-25
    Description: Presented at the Eighth Symposium on Harmful Algae in the U.S. November 15 - 19, 2015, Long Beach, California
    Description: Karenia brevis is a marine dinoflagellate responsible for Florida red tide (FRT) blooms off the west coast of Florida. K. brevis contains brevetoxins, a neurotoxin that is absorbed by shellfish as well as released into the air. Brevetoxins are known to cause disruptions in normal neurological functions and are associated with neurotoxic shellfish poisoning (NSP). Previous research has emphasized the effect of FRT blooms on human health, from gastrointestinal to respiratory illnesses. However, there has been little research examining the effect of FRT blooms on neurological illnesses. There is research highlighting the biochemical effects of brevetoxins on mammalian nervous systems, so these symptoms can be matched to hospital codes that describe a hospital patient’s affliction. With these hospitalization codes, it is possible to study the relationship between FRT blooms and the occurrence of neurological illnesses in affected counties. The hospital data consists of inpatient data from 1988-2010 and emergency room data from 2005-2010. We will also use data containing K. brevis cells per liter as a measure of red tide occurrences.
    Description: This research was sponsored by the National Science Foundation under NSF/CNH grant no. 1009106
    Keywords: Florida Red Tide ; Harmful algae bloom ; HAB
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 5
    Publication Date: 2022-05-25
    Description: Presented at the Seventh Symposium on Harmful Algae in the U.S., Sarasota, FL, 27-31 October 2013.
    Description: Coupled nature-human (CNH) systems are now the focus of a growing number of inter-disciplinary research programs worldwide. As implied by the term “coupled,” these systems in-volve interactions between humans and nature, often affecting the dynamic characteristics of each component. Both natural and social scientists are engaged in developing a deeper un-derstanding of these dynamics, focusing on the linkages and feedbacks affecting the trajectories of coupled system behavior. Several researchers have begun to identify the generic aspects of nature-human couplings. Many of these aspects have been adapted from the field of ecology, where the dynamic characteristics of ecological systems have been studied for decades. These aspects include system heterogeneity, time lags, reciprocal feedbacks, thresholds, surprises, legacies, and resilience. The presence of such aspects has implications for the stability and persistence of particular ecosystem states, leading potentially to further implications for human heath and welfare. This talk reviews a specific type of natural hazard-human coupling that relates to coastal blooms of toxic marine algae, drawing examples primarily from human interactions with blooms of the toxic dinoflagellate Karenia brevis from the eastern Gulf of Mexico. This talk introduces a set of HAB Symposium “speed” presentations relating to different aspects of an ongoing multi-institutional and inter-disciplinary research project that examines Florida red tides as a type of CNH system. We present examples of the generic aspects of CNH systems in the context of Florida red tides, and we discuss also some of the challenges involved in compiling relevant data to support our analytical efforts.
    Keywords: CHANS ; Coupled nature-human system ; Red tide ; HAB ; Harmful algae bloom
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 6
    Publication Date: 2022-05-25
    Description: Presented at the Eighth Symposium on Harmful Algae in the U.S. November 15 - 19, 2015, Long Beach, California
    Description: We analyzed a potential relationship between changes in school absences in Sarasota County and Karenia brevis (Kb) count data. Brevetoxins released during Kb blooms could be a reason for students experiencing increased respiratory or gastrointestinal illnesses, causing an increase in absence rates. We designed a map to relate the locations of Sarasota County schools and the distributions of those Kb counts with a minimum of 10,000 cell counts per liter and above. Due to the proximity of Kb counts, we hypothesized that brevetoxins could have a greater effect on the schools near the coast of Florida rather than the schools inland. Because individuals could be affected by brevetoxins up to several days after being exposed, we expected to find a lagged effect of a bloom occurrence on school absences. Using a regression approach, we were unable to detect an association between Kb counts and student absences. In some cases, the direction of the effects were opposite to what would be expected (i.e., an increase in Kb counts was associated with a reduction in the percent absent rate). The results indicated that over 70% of the variation in the school percent absent rate could be explained by the latent characteristics of individual schools (such as variations in student populations across different schools), by school week, by month (such as the effects of flu outbreaks or and other seasonal factors), and by year.
    Keywords: Florida Red Tide ; Harmful algae bloom ; HAB
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 7
    Publication Date: 2016-01-20
    Description: Congenital heart disease (CHD) patients have an increased prevalence of extracardiac congenital anomalies (CAs) and risk of neurodevelopmental disabilities (NDDs). Exome sequencing of 1213 CHD parent-offspring trios identified an excess of protein-damaging de novo mutations, especially in genes highly expressed in the developing heart and brain. These mutations accounted for 20% of patients with CHD, NDD, and CA but only 2% of patients with isolated CHD. Mutations altered genes involved in morphogenesis, chromatin modification, and transcriptional regulation, including multiple mutations in RBFOX2, a regulator of mRNA splicing. Genes mutated in other cohorts examined for NDD were enriched in CHD cases, particularly those with coexisting NDD. These findings reveal shared genetic contributions to CHD, NDD, and CA and provide opportunities for improved prognostic assessment and early therapeutic intervention in CHD patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Homsy, Jason -- Zaidi, Samir -- Shen, Yufeng -- Ware, James S -- Samocha, Kaitlin E -- Karczewski, Konrad J -- DePalma, Steven R -- McKean, David -- Wakimoto, Hiroko -- Gorham, Josh -- Jin, Sheng Chih -- Deanfield, John -- Giardini, Alessandro -- Porter, George A Jr -- Kim, Richard -- Bilguvar, Kaya -- Lopez-Giraldez, Francesc -- Tikhonova, Irina -- Mane, Shrikant -- Romano-Adesman, Angela -- Qi, Hongjian -- Vardarajan, Badri -- Ma, Lijiang -- Daly, Mark -- Roberts, Amy E -- Russell, Mark W -- Mital, Seema -- Newburger, Jane W -- Gaynor, J William -- Breitbart, Roger E -- Iossifov, Ivan -- Ronemus, Michael -- Sanders, Stephan J -- Kaltman, Jonathan R -- Seidman, Jonathan G -- Brueckner, Martina -- Gelb, Bruce D -- Goldmuntz, Elizabeth -- Lifton, Richard P -- Seidman, Christine E -- Chung, Wendy K -- T32 HL007208/HL/NHLBI NIH HHS/ -- Arthritis Research UK/United Kingdom -- British Heart Foundation/United Kingdom -- Department of Health/United Kingdom -- Howard Hughes Medical Institute/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1262-6. doi: 10.1126/science.aac9396.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Harvard Medical School, Boston, MA, USA. Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. ; Departments of Systems Biology and Biomedical Informatics, Columbia University Medical Center, New York, NY, USA. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. NIHR Cardiovascular Biomedical Research Unit at Royal Brompton & Harefield NHS Foundation and Trust and Imperial College London, London, UK. National Heart & Lung Institute, Imperial College London, London, UK. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. Analytical and Translational Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston MA, USA. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. Howard Hughes Medical Institute, Harvard University, Boston, MA, USA. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. ; Department of Cardiology, University College London and Great Ormond Street Hospital, London, UK. ; Department of Pediatrics, University of Rochester Medical Center, The School of Medicine and Dentistry, Rochester, NY, USA. ; Section of Cardiothoracic Surgery, University of Southern California Keck School of Medicine, Los Angeles, CA, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. Yale Center for Genome Analysis, Yale University, New Haven, CT, USA. ; Yale Center for Genome Analysis, Yale University, New Haven, CT, USA. ; Steven and Alexandra Cohen Children's Medical Center of New York, New Hyde Park, NY, USA. ; Departments of Systems Biology and Biomedical Informatics, Columbia University Medical Center, New York, NY, USA. Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA. ; Department of Neurology, Columbia University Medical Center, New York, NY, USA. ; Department of Pediatrics, Columbia University Medical Center, New York, NY, USA. ; Department of Cardiology, Children's Hospital Boston, Boston, MA, USA. ; Division of Pediatric Cardiology, University of Michigan, Ann Arbor, MI, USA. ; Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada. ; Department of Cardiology, Boston Children's Hospital, Boston, MA, USA. ; Department of Pediatric Cardiac Surgery, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. ; Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA. ; Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA. ; Heart Development and Structural Diseases Branch, Division of Cardiovascular Sciences, NHLBI/NIH, Bethesda, MD, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Mindich Child Health and Development Institute and Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Department of Pediatrics, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. Howard Hughes Medical Institute, Yale University, New Haven, CT, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. Howard Hughes Medical Institute, Harvard University, Boston, MA, USA. Cardiovascular Division, Brigham & Women's Hospital, Harvard University, Boston, MA, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Departments of Pediatrics and Medicine, Columbia University Medical Center, New York, NY, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785492" target="_blank"〉PubMed〈/a〉
    Keywords: Brain/abnormalities/metabolism ; Child ; Congenital Abnormalities/genetics ; Exome/genetics ; Heart Defects, Congenital/*diagnosis/*genetics ; Humans ; Mutation ; Nervous System Malformations/*genetics ; Neurogenesis/*genetics ; Prognosis ; RNA Splicing/genetics ; RNA, Messenger/genetics ; RNA-Binding Proteins/genetics ; Repressor Proteins/genetics ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2016-02-26
    Description: 5-Methylthioadenosine phosphorylase (MTAP) is a key enzyme in the methionine salvage pathway. The MTAP gene is frequently deleted in human cancers because of its chromosomal proximity to the tumor suppressor gene CDKN2A. By interrogating data from a large-scale short hairpin RNA-mediated screen across 390 cancer cell line models, we found that the viability of MTAP-deficient cancer cells is impaired by depletion of the protein arginine methyltransferase PRMT5. MTAP-deleted cells accumulate the metabolite methylthioadenosine (MTA), which we found to inhibit PRMT5 methyltransferase activity. Deletion of MTAP in MTAP-proficient cells rendered them sensitive to PRMT5 depletion. Conversely, reconstitution of MTAP in an MTAP-deficient cell line rescued PRMT5 dependence. Thus, MTA accumulation in MTAP-deleted cancers creates a hypomorphic PRMT5 state that is selectively sensitized toward further PRMT5 inhibition. Inhibitors of PRMT5 that leverage this dysregulated metabolic state merit further investigation as a potential therapy for MTAP/CDKN2A-deleted tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mavrakis, Konstantinos J -- McDonald, E Robert 3rd -- Schlabach, Michael R -- Billy, Eric -- Hoffman, Gregory R -- deWeck, Antoine -- Ruddy, David A -- Venkatesan, Kavitha -- Yu, Jianjun -- McAllister, Gregg -- Stump, Mark -- deBeaumont, Rosalie -- Ho, Samuel -- Yue, Yingzi -- Liu, Yue -- Yan-Neale, Yan -- Yang, Guizhi -- Lin, Fallon -- Yin, Hong -- Gao, Hui -- Kipp, D Randal -- Zhao, Songping -- McNamara, Joshua T -- Sprague, Elizabeth R -- Zheng, Bing -- Lin, Ying -- Cho, Young Shin -- Gu, Justin -- Crawford, Kenneth -- Ciccone, David -- Vitari, Alberto C -- Lai, Albert -- Capka, Vladimir -- Hurov, Kristen -- Porter, Jeffery A -- Tallarico, John -- Mickanin, Craig -- Lees, Emma -- Pagliarini, Raymond -- Keen, Nicholas -- Schmelzle, Tobias -- Hofmann, Francesco -- Stegmeier, Frank -- Sellers, William R -- New York, N.Y. -- Science. 2016 Mar 11;351(6278):1208-13. doi: 10.1126/science.aad5944. Epub 2016 Feb 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Novartis Institutes for Biomedical Research, Cambridge, MA 02139, USA. ; Novartis Institutes for Biomedical Research, Basel CH-4002, Switzerland. ; Novartis Institutes for Biomedical Research, Emeryville, CA 94608, USA. ; China Novartis Institutes for Biomedical Research, Shanghai 201203, China. ; Novartis Institutes for Biomedical Research, Cambridge, MA 02139, USA. william.sellers@novartis.com fstegmeier@ksqtx.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26912361" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line, Tumor ; Cell Survival ; Cyclin-Dependent Kinase Inhibitor p16/genetics/*metabolism ; Deoxyadenosines/metabolism ; Gene Deletion ; Humans ; Methionine/*metabolism ; Neoplasms/drug therapy/genetics/*metabolism ; Protein-Arginine N-Methyltransferases/genetics/*metabolism ; Purine-Nucleoside Phosphorylase/genetics/*metabolism ; RNA, Small Interfering/genetics ; Thionucleosides/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2016-02-06
    Description: SH3 and multiple ankyrin repeat domains 3 (SHANK3) haploinsufficiency is causative for the neurological features of Phelan-McDermid syndrome (PMDS), including a high risk of autism spectrum disorder (ASD). We used unbiased, quantitative proteomics to identify changes in the phosphoproteome of Shank3-deficient neurons. Down-regulation of protein kinase B (PKB/Akt)-mammalian target of rapamycin complex 1 (mTORC1) signaling resulted from enhanced phosphorylation and activation of serine/threonine protein phosphatase 2A (PP2A) regulatory subunit, B56beta, due to increased steady-state levels of its kinase, Cdc2-like kinase 2 (CLK2). Pharmacological and genetic activation of Akt or inhibition of CLK2 relieved synaptic deficits in Shank3-deficient and PMDS patient-derived neurons. CLK2 inhibition also restored normal sociability in a Shank3-deficient mouse model. Our study thereby provides a novel mechanistic and potentially therapeutic understanding of deregulated signaling downstream of Shank3 deficiency.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bidinosti, Michael -- Botta, Paolo -- Kruttner, Sebastian -- Proenca, Catia C -- Stoehr, Natacha -- Bernhard, Mario -- Fruh, Isabelle -- Mueller, Matthias -- Bonenfant, Debora -- Voshol, Hans -- Carbone, Walter -- Neal, Sarah J -- McTighe, Stephanie M -- Roma, Guglielmo -- Dolmetsch, Ricardo E -- Porter, Jeffrey A -- Caroni, Pico -- Bouwmeester, Tewis -- Luthi, Andreas -- Galimberti, Ivan -- New York, N.Y. -- Science. 2016 Mar 11;351(6278):1199-203. doi: 10.1126/science.aad5487. Epub 2016 Feb 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Molecular Pathways, Novartis Institutes for Biomedical Research, Basel, Switzerland. ; Friedrich Miescher Institute, Basel, Switzerland. ; Analytical Sciences and Imaging, Novartis Institutes for Biomedical Research, Basel, Switzerland. ; Neuroscience, Novartis Institutes for Biomedical Research, Cambridge, USA. ; Developmental Molecular Pathways, Novartis Institutes for Biomedical Research, Basel, Switzerland. ivan.galimberti@novartis.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26847545" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Autism Spectrum Disorder/*drug therapy/enzymology/genetics ; Chromosome Deletion ; Chromosome Disorders/genetics ; Chromosomes, Human, Pair 22/genetics ; Disease Models, Animal ; Down-Regulation ; Gene Knockdown Techniques ; Humans ; Insulin-Like Growth Factor I/metabolism ; Mice ; Molecular Sequence Data ; Multiprotein Complexes/metabolism ; Nerve Tissue Proteins/*genetics ; Neurons/enzymology ; Phosphorylation ; Protein Phosphatase 2/metabolism ; Protein-Serine-Threonine Kinases/*antagonists & inhibitors/metabolism ; Protein-Tyrosine Kinases/*antagonists & inhibitors/metabolism ; Proteomics ; Proto-Oncogene Proteins c-akt/genetics/metabolism ; Rats ; Signal Transduction ; TOR Serine-Threonine Kinases/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2015-01-09
    Description: Yeasts, which have been a component of the human diet for at least 7,000 years, possess an elaborate cell wall alpha-mannan. The influence of yeast mannan on the ecology of the human microbiota is unknown. Here we show that yeast alpha-mannan is a viable food source for the Gram-negative bacterium Bacteroides thetaiotaomicron, a dominant member of the microbiota. Detailed biochemical analysis and targeted gene disruption studies support a model whereby limited cleavage of alpha-mannan on the surface generates large oligosaccharides that are subsequently depolymerized to mannose by the action of periplasmic enzymes. Co-culturing studies showed that metabolism of yeast mannan by B. thetaiotaomicron presents a 'selfish' model for the catabolism of this difficult to breakdown polysaccharide. Genomic comparison with B. thetaiotaomicron in conjunction with cell culture studies show that a cohort of highly successful members of the microbiota has evolved to consume sterically-restricted yeast glycans, an adaptation that may reflect the incorporation of eukaryotic microorganisms into the human diet.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cuskin, Fiona -- Lowe, Elisabeth C -- Temple, Max J -- Zhu, Yanping -- Cameron, Elizabeth A -- Pudlo, Nicholas A -- Porter, Nathan T -- Urs, Karthik -- Thompson, Andrew J -- Cartmell, Alan -- Rogowski, Artur -- Hamilton, Brian S -- Chen, Rui -- Tolbert, Thomas J -- Piens, Kathleen -- Bracke, Debby -- Vervecken, Wouter -- Hakki, Zalihe -- Speciale, Gaetano -- Munoz-Munoz, Jose L -- Day, Andrew -- Pena, Maria J -- McLean, Richard -- Suits, Michael D -- Boraston, Alisdair B -- Atherly, Todd -- Ziemer, Cherie J -- Williams, Spencer J -- Davies, Gideon J -- Abbott, D Wade -- Martens, Eric C -- Gilbert, Harry J -- 097907/Wellcome Trust/United Kingdom -- BB/G016127/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- GM090080/GM/NIGMS NIH HHS/ -- MOP-68913/Canadian Institutes of Health Research/Canada -- WT097907AIA/Wellcome Trust/United Kingdom -- England -- Nature. 2015 Jan 8;517(7533):165-9. doi: 10.1038/nature13995.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne NE2 4HH, UK [2] Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, USA. ; Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne NE2 4HH, UK. ; Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan 48109 USA. ; Department of Chemistry, University of York, York YO10 5DD, UK. ; School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia. ; Interdisciplinary Biochemistry Graduate Program, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA. ; Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA. ; Department of Pharmaceutical Chemistry, University of Kansas School of Pharmacy, 2095 Constant Avenue, Lawrence, Kansas 66047, USA. ; Oxyrane, 9052 Ghent, Belgium. ; Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, USA. ; Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4B1, Canada. ; Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8P 5C2, Canada. ; USDA, Agricultural Research Service, National Laboratory for Agriculture and the Environment, Ames, Iowa 50011, USA. ; 1] Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, USA [2] Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4B1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25567280" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteroidetes/cytology/enzymology/genetics/*metabolism ; Biological Evolution ; Carbohydrate Conformation ; Diet ; Enzymes/genetics/metabolism ; Female ; Gastrointestinal Tract/*microbiology ; Genetic Loci/genetics ; Germ-Free Life ; Glycoproteins/chemistry/metabolism ; Humans ; Male ; Mannans/chemistry/*metabolism ; Mannose/metabolism ; Mice ; *Models, Biological ; Models, Molecular ; Oligosaccharides/chemistry/metabolism ; Periplasm/enzymology ; Yeasts/*chemistry
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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