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Medina-Aguiñaga D, Hoey RF, Wilkins NL, Ugiliweneza B, Fell J, Harkema SJ, Hubscher CH. Mid-lumbar (L3) epidural stimulation effects on bladder and external urethral sphincter in non-injured and chronically transected urethane-anesthetized rats. Sci Rep 2023; 13:12258. [PMID: 37507456 PMCID: PMC10382500 DOI: 10.1038/s41598-023-39388-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 07/25/2023] [Indexed: 07/30/2023] Open
Abstract
Recent pre-clinical and clinical spinal cord epidural stimulation (scES) experiments specifically targeting the thoracolumbar and lumbosacral circuitries mediating lower urinary tract (LUT) function have shown improvements in storage, detrusor pressure, and emptying. With the existence of a lumbar spinal coordinating center in rats that is involved with external urethral sphincter (EUS) functionality during micturition, the mid-lumbar spinal cord (specifically L3) was targeted in the current study with scES to determine if the EUS and thus the void pattern could be modulated, using both intact and chronic complete spinal cord injured female rats under urethane anesthesia. L3 scES at select frequencies and intensities of stimulation produced a reduction in void volumes and EUS burst duration in intact rats. After chronic transection, three different subgroups of LUT dysfunction were identified and the response to L3 scES promoted different cystometry outcomes, including changes in EUS bursting. The current findings suggest that scES at the L3 level can generate functional neuromodulation of both the urinary bladder and the EUS in intact and SCI rats to enhance voiding in a variety of clinical scenarios.
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Affiliation(s)
- Daniel Medina-Aguiñaga
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, 511 S. Floyd St., MDR, Room 111, Louisville, KY, 40202, USA
| | - Robert F Hoey
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, 511 S. Floyd St., MDR, Room 111, Louisville, KY, 40202, USA
- Physical Medicine and Rehabilitation Department, MetroHealth Rehabilitation Institute of Ohio, Cleveland, OH, USA
- Physical Medicine and Rehabilitiation Department, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Natasha L Wilkins
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, 511 S. Floyd St., MDR, Room 111, Louisville, KY, 40202, USA
| | - Beatrice Ugiliweneza
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
- Department of Health Management and Systems Science, School of Public Health and Information Science, University of Louisville, Louisville, KY, USA
| | - Jason Fell
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, 511 S. Floyd St., MDR, Room 111, Louisville, KY, 40202, USA
| | - Susan J Harkema
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Charles H Hubscher
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, 511 S. Floyd St., MDR, Room 111, Louisville, KY, 40202, USA.
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.
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Crous PW, Osieck ER, Shivas RG, Tan YP, Bishop-Hurley SL, Esteve-Raventós F, Larsson E, Luangsa-Ard JJ, Pancorbo F, Balashov S, Baseia IG, Boekhout T, Chandranayaka S, Cowan DA, Cruz RHSF, Czachura P, De la Peña-Lastra S, Dovana F, Drury B, Fell J, Flakus A, Fotedar R, Jurjević Ž, Kolecka A, Mack J, Maggs-Kölling G, Mahadevakumar S, Mateos A, Mongkolsamrit S, Noisripoom W, Plaza M, Overy DP, Piątek M, Sandoval-Denis M, Vauras J, Wingfield MJ, Abell SE, Ahmadpour A, Akulov A, Alavi F, Alavi Z, Altés A, Alvarado P, Anand G, Ashtekar N, Assyov B, Banc-Prandi G, Barbosa KD, Barreto GG, Bellanger JM, Bezerra JL, Bhat DJ, Bilański P, Bose T, Bozok F, Chaves J, Costa-Rezende DH, Danteswari C, Darmostuk V, Delgado G, Denman S, Eichmeier A, Etayo J, Eyssartier G, Faulwetter S, Ganga KGG, Ghosta Y, Goh J, Góis JS, Gramaje D, Granit L, Groenewald M, Gulden G, Gusmão LFP, Hammerbacher A, Heidarian Z, Hywel-Jones N, Jankowiak R, Kaliyaperumal M, Kaygusuz O, Kezo K, Khonsanit A, Kumar S, Kuo CH, Læssøe T, Latha KPD, Loizides M, Luo SM, Maciá-Vicente JG, Manimohan P, Marbach PAS, Marinho P, Marney TS, Marques G, Martín MP, Miller AN, Mondello F, Moreno G, Mufeeda KT, Mun HY, Nau T, Nkomo T, Okrasińska A, Oliveira JPAF, Oliveira RL, Ortiz DA, Pawłowska J, Pérez-De-Gregorio MÀ, Podile AR, Portugal A, Privitera N, Rajeshkumar KC, Rauf I, Rian B, Rigueiro-Rodríguez A, Rivas-Torres GF, Rodriguez-Flakus P, Romero-Gordillo M, Saar I, Saba M, Santos CD, Sarma PVSRN, Siquier JL, Sleiman S, Spetik M, Sridhar KR, Stryjak-Bogacka M, Szczepańska K, Taşkın H, Tennakoon DS, Thanakitpipattana D, Trovão J, Türkekul I, van Iperen AL, van 't Hof P, Vasquez G, Visagie CM, Wingfield BD, Wong PTW, Yang WX, Yarar M, Yarden O, Yilmaz N, Zhang N, Zhu YN, Groenewald JZ. Fungal Planet description sheets: 1478-1549. Persoonia 2023; 50:158-310. [PMID: 38567263 PMCID: PMC10983837 DOI: 10.3767/persoonia.2023.50.05] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 05/10/2023] [Indexed: 04/04/2024]
Abstract
Novel species of fungi described in this study include those from various countries as follows: Australia, Aschersonia mackerrasiae on whitefly, Cladosporium corticola on bark of Melaleuca quinquenervia, Penicillium nudgee from soil under Melaleuca quinquenervia, Pseudocercospora blackwoodiae on leaf spot of Persoonia falcata, and Pseudocercospora dalyelliae on leaf spot of Senna alata. Bolivia, Aspicilia lutzoniana on fully submersed siliceous schist in high-mountain streams, and Niesslia parviseta on the lower part and apothecial discs of Erioderma barbellatum on a twig. Brazil, Cyathus bonsai on decaying wood, Geastrum albofibrosum from moist soil with leaf litter, Laetiporus pratigiensis on a trunk of a living unknown hardwood tree species, and Scytalidium synnematicum on dead twigs of unidentified plant. Bulgaria, Amanita abscondita on sandy soil in a plantation of Quercus suber. Canada, Penicillium acericola on dead bark of Acer saccharum, and Penicillium corticola on dead bark of Acer saccharum. China, Colletotrichum qingyuanense on fruit lesion of Capsicum annuum. Denmark, Helminthosphaeria leptospora on corticioid Neohypochnicium cremicolor. Ecuador (Galapagos), Phaeosphaeria scalesiae on Scalesia sp. Finland, Inocybe jacobssonii on calcareous soils in dry forests and park habitats. France, Cortinarius rufomyrrheus on sandy soil under Pinus pinaster, and Periconia neominutissima on leaves of Poaceae. India, Coprinopsis fragilis on decaying bark of logs, Filoboletus keralensis on unidentified woody substrate, Penicillium sankaranii from soil, Physisporinus tamilnaduensis on the trunk of Azadirachta indica, and Poronia nagaraholensis on elephant dung. Iran, Neosetophoma fici on infected leaves of Ficus elastica. Israel, Cnidariophoma eilatica (incl. Cnidariophoma gen. nov.) from Stylophora pistillata. Italy, Lyophyllum obscurum on acidic soil. Namibia, Aureobasidium faidherbiae on dead leaf of Faidherbia albida, and Aureobasidium welwitschiae on dead leaves of Welwitschia mirabilis. Netherlands, Gaeumannomycella caricigena on dead culms of Carex elongata, Houtenomyces caricicola (incl. Houtenomyces gen. nov.) on culms of Carex disticha, Neodacampia ulmea (incl. Neodacampia gen. nov.) on branch of Ulmus laevis, Niesslia phragmiticola on dead standing culms of Phragmites australis, Pseudopyricularia caricicola on culms of Carex disticha, and Rhodoveronaea nieuwwulvenica on dead bamboo sticks. Norway, Arrhenia similis half-buried and moss-covered pieces of rotting wood in grass-grown path. Pakistan, Mallocybe ahmadii on soil. Poland, Beskidomyces laricis (incl. Beskidomyces gen. nov.) from resin of Larix decidua ssp. polonica, Lapidomyces epipinicola from sooty mould community on Pinus nigra, and Leptographium granulatum from a gallery of Dendroctonus micans on Picea abies. Portugal, Geoglossum azoricum on mossy areas of laurel forest areas planted with Cryptomeria japonica, and Lunasporangiospora lusitanica from a biofilm covering a biodeteriorated limestone wall. Qatar, Alternaria halotolerans from hypersaline sea water, and Alternaria qatarensis from water sample collected from hypersaline lagoon. South Africa, Alfaria thamnochorti on culm of Thamnochortus fraternus, Knufia aloeicola on Aloe gariepensis, Muriseptatomyces restionacearum (incl. Muriseptatomyces gen. nov.) on culms of Restionaceae, Neocladosporium arctotis on nest of cases of bag worm moths (Lepidoptera, Psychidae) on Arctotis auriculata, Neodevriesia scadoxi on leaves of Scadoxus puniceus, Paraloratospora schoenoplecti on stems of Schoenoplectus lacustris, Tulasnella epidendrea from the roots of Epidendrum × obrienianum, and Xenoidriella cinnamomi (incl. Xenoidriella gen. nov.) on leaf of Cinnamomum camphora. South Korea, Lemonniera fraxinea on decaying leaves of Fraxinus sp. from pond. Spain, Atheniella lauri on the bark of fallen trees of Laurus nobilis, Halocryptovalsa endophytica from surface-sterilised, asymptomatic roots of Salicornia patula, Inocybe amygdaliolens on soil in mixed forest, Inocybe pityusarum on calcareous soil in mixed forest, Inocybe roseobulbipes on acidic soils, Neonectria borealis from roots of Vitis berlandieri × Vitis rupestris, Sympoventuria eucalyptorum on leaves of Eucalyptus sp., and Tuber conchae from soil. Sweden, Inocybe bidumensis on calcareous soil. Thailand, Cordyceps sandindaengensis on Lepidoptera pupa, buried in soil, Ophiocordyceps kuchinaraiensis on Coleoptera larva, buried in soil, and Samsoniella winandae on Lepidoptera pupa, buried in soil. Taiwan region (China), Neophaeosphaeria livistonae on dead leaf of Livistona rotundifolia. Türkiye, Melanogaster anatolicus on clay loamy soils. UK, Basingstokeomyces allii (incl. Basingstokeomyces gen. nov.) on leaves of Allium schoenoprasum. Ukraine, Xenosphaeropsis corni on recently dead stem of Cornus alba. USA, Nothotrichosporon aquaticum (incl. Nothotrichosporon gen. nov.) from water, and Periconia philadelphiana from swab of coil surface. Morphological and culture characteristics for these new taxa are supported by DNA barcodes. Citation: Crous PW, Osieck ER, Shivas RG, et al. 2023. Fungal Planet description sheets: 1478-1549. Persoonia 50: 158- 310. https://doi.org/10.3767/persoonia.2023.50.05.
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Affiliation(s)
- P W Crous
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508AD Utrecht, The Netherlands
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - E R Osieck
- Jkvr. C.M. van Asch van Wijcklaan 19, 3972 ST Driebergen-Rijsenburg, Netherlands
| | - R G Shivas
- Centre for Crop Health, University of Southern Queensland, Toowoomba 4350, Queensland, Australia
| | - Y P Tan
- Queensland Plant Pathology Herbarium, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - S L Bishop-Hurley
- Queensland Plant Pathology Herbarium, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - F Esteve-Raventós
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Ciencias de la Vida (Botánica). 28805 Alcalá de Henares, Madrid, Spain
| | - E Larsson
- Biological and Environmental Sciences, University of Gothenburg, and Gothenburg Global Biodiversity Centre, Box 461, SE40530 Göteborg, Sweden
| | - J J Luangsa-Ard
- BIOTEC, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - F Pancorbo
- Sociedad Micológica de Madrid, Real Jardín Botánico, C/ Claudio Moyano 1, 28014 Madrid, Spain
| | - S Balashov
- EMSLAnalytical, Inc., 200 Route 130 North, Cinnaminson, NJ 08077 USA
| | - I G Baseia
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - T Boekhout
- College of Science, King Saud University, P.O. Box 2455, Riyadh-11451, Saudi Arabia
| | - S Chandranayaka
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore - 570006, Karnataka, India
| | - D A Cowan
- Centre for Microbial Ecology and Genomics, Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Private Bag X20, Hatfield 0028, Pretoria, South Africa
| | - R H S F Cruz
- Centro das Ciências Biológicas e da Saúde, Universidade Federal do Oeste da Bahia, Barreiras, 47810-047, Brazil
| | - P Czachura
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, Poland
| | | | - F Dovana
- Via Quargnento, 17, 15029 Solero, Italy
| | - B Drury
- Queensland College of Teachers, Mount Alvernia College, Kedron 4031, Queensland, Australia
| | - J Fell
- Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Key Biscayne, Florida, USA
| | - A Flakus
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, Poland
| | - R Fotedar
- Department of Genetic Engineering, Biotechnology Centre, Ministry of Environment, Doha, State of Qatar
| | - Ž Jurjević
- EMSLAnalytical, Inc., 200 Route 130 North, Cinnaminson, NJ 08077 USA
| | - A Kolecka
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508AD Utrecht, The Netherlands
| | - J Mack
- Ottawa Research & Development Centre, Agriculture &AgriFood Canada, 960 Carling Ave., Ottawa, Ontario, Canada, K1A 0C6
| | - G Maggs-Kölling
- Gobabeb Namib Research Institute, Walvis Bay, Namibia
- Unit for Environmental Sciences and Management, North-West University, P. Bag X1290, Potchefstroom, 2520, South Africa
| | - S Mahadevakumar
- Forest Pathology Department, Forest Health Division, KSCSTE-Kerala Forest Research Institute, Peechi - 680653, Thrissur, Kerala, India
- Botanical Survey of India, Andaman and Nicobar Regional Center, Haddo - 744102, Port Blair, South Andaman, India
| | - A Mateos
- Sociedad Micológica Extremeña, C/ Sagitario 14, 10001 Cáceres, Spain
| | - S Mongkolsamrit
- BIOTEC, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - W Noisripoom
- BIOTEC, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - M Plaza
- C/ La Angostura, 20, 11370 Los Barrios, Cádiz, Spain
| | - D P Overy
- Ottawa Research & Development Centre, Agriculture &AgriFood Canada, 960 Carling Ave., Ottawa, Ontario, Canada, K1A 0C6
| | - M Piątek
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, Poland
| | - M Sandoval-Denis
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508AD Utrecht, The Netherlands
| | - J Vauras
- Biological Collections of Åbo Akademi University, Biodiversity Unit, Herbarium, FI-20014 University of Turku, Finland
| | - M J Wingfield
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - S E Abell
- Australian Tropical Herbarium, James Cook University, Smithfield 4878, Queensland, Australia
| | - A Ahmadpour
- Higher Education Centre of Shahid Bakeri, Urmia University, Miyandoab, Iran
| | - A Akulov
- Department of Mycology and Plant Resistance, V. N. Karazin Kharkiv National University, Maidan Svobody 4, 61022 Kharkiv, Ukraine
| | - F Alavi
- Higher Education Centre of Shahid Bakeri, Urmia University, Miyandoab, Iran
| | - Z Alavi
- Higher Education Centre of Shahid Bakeri, Urmia University, Miyandoab, Iran
| | - A Altés
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Ciencias de la Vida (Botánica). 28805 Alcalá de Henares, Madrid, Spain
| | - P Alvarado
- ALVALAB, Dr. Fernando Bongera st., Severo Ochoa bldg. S1.04, 33006 Oviedo, Spain
| | - G Anand
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology (Fungi) group, MACS Agharkar Research Institute, GG Agharkar Road, Pune, Maharashtra State 411004, India
| | - N Ashtekar
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology (Fungi) group, MACS Agharkar Research Institute, GG Agharkar Road, Pune, Maharashtra State 411004, India
| | - B Assyov
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Str., 1113 Sofia, Bulgaria
| | - G Banc-Prandi
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - K D Barbosa
- Programa de Pós-Graduação em Sistemática e Evolução, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, 3000, 59072-970, Natal, Rio Grande do Norte, Brazil
| | - G G Barreto
- Department of Biology, State University of Feira de Santana, Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, Brazil
| | - J-M Bellanger
- CEFE, CNRS, Université de Montpellier, EPHE, IRD, INSERM, Campus CNRS, 1919 Route de Mende, F-34293 Montpellier, France
| | - J L Bezerra
- Federal University of Pernambuco, Pernambuco, Brazil
| | - D J Bhat
- College of Science, King Saud University, P.O. Box 2455, Riyadh-11451, Saudi Arabia
| | - P Bilański
- Department of Forest Ecosystems Protection, University of Agriculture in Krakow, Al. 29 Listopada 46, 31-425 Krakow, Poland
| | - T Bose
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - F Bozok
- Department of Biology, Faculty ofArts and Science, Osmaniye KorkutAta University, 80000 Osmaniye, Türkiye
| | - J Chaves
- Universidad San Francisco de Quito USFQ, Colegio de Ciencias Biológicas y Ambientales, Diego de Robles s/n, 170901, Quito, Ecuador
- San Francisco State University, Department of Biology, 1600 Holloway Av, San Francisco CA 94132, USA
| | - D H Costa-Rezende
- Department of Biology, State University of Feira de Santana, Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, Brazil
| | - C Danteswari
- Department of Plant Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - V Darmostuk
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, Poland
| | - G Delgado
- Eurofins Built Environment, 6110 W. 34th St, Houston, TX 77092, USA
| | - S Denman
- Forest Research, Alice Holt Lodge, Farnham, Surrey, UK
| | - A Eichmeier
- Mendeleum - Institute of Genetics, Mendel University in Brno, Valticka 334, Lednice, 69144, Czech Republic
| | - J Etayo
- Navarro Villoslada 16, 3º cha., E-31003 Pamplona, Navarra, Spain
| | - G Eyssartier
- Institut de systématique, évolution, biodiversité (UMR 7205-MNHN, CNRS, Sorbonne Université, EPHE, Université des Antilles), 45 rue Buffon, F-75005 Paris, France
| | - S Faulwetter
- Department of Geology, University of Patras, 26504 Rio Patras, Greece
| | - K G G Ganga
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - Y Ghosta
- Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran
| | - J Goh
- Fungal Research Team, Microbial Research Department, Nakdonggang National Institute of Biological Resources, Korea
| | - J S Góis
- Programa de Pós-Graduação em Sistemática e Evolução, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, 3000, 59072-970, Natal, Rio Grande do Norte, Brazil
| | - D Gramaje
- Instituto de Ciencias de la Vid y del Vino (ICVV), CSIC - Universidad de La Rioja - Gobierno de La Rioja, Ctra. LO-20 Salida 13, 26007 Logroño, Spain
| | - L Granit
- Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel & Interuniversity Institute of Marine Sciences, Eilat, Israel
| | - M Groenewald
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508AD Utrecht, The Netherlands
| | - G Gulden
- Natural History Museum, University of Oslo, PO Box 1172 Blindern, NO-0318 Oslo, Norway
| | - L F P Gusmão
- Department of Biology, State University of Feira de Santana, Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, Brazil
| | - A Hammerbacher
- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa
| | - Z Heidarian
- Higher Education Centre of Shahid Bakeri, Urmia University, Miyandoab, Iran
| | - N Hywel-Jones
- Zhejiang BioAsia Institute of Life Sciences, Pinghu 314200, Zhejiang, People's Republic of China
| | - R Jankowiak
- Department of Forest Ecosystems Protection, University of Agriculture in Krakow, Al. 29 Listopada 46, 31-425 Krakow, Poland
| | - M Kaliyaperumal
- CAS in Botany, University of Madras, Chennai, Tamil Nadu, India
| | - O Kaygusuz
- Department of Plant and Animal Production, Atabey Vocational School, Isparta University of Applied Sciences, 32670 Isparta, Türkiye
| | - K Kezo
- CAS in Botany, University of Madras, Chennai, Tamil Nadu, India
| | - A Khonsanit
- BIOTEC, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - S Kumar
- Forest Pathology Department, Forest Health Division, KSCSTE-Kerala Forest Research Institute, Peechi - 680653, Thrissur, Kerala, India
| | - C H Kuo
- Department of Plant Medicine, National Chiayi University, 300 Syuefu Road, Chiayi City 60004, Taiwan
| | - T Læssøe
- Globe Institute/Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø, Denmark
| | - K P D Latha
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | | | - S M Luo
- University of Sydney, Plant Breeding Institute, 107 Cobbitty Rd, Cobbitty, New South Wales, Australia
| | - J G Maciá-Vicente
- Plant Ecology and Nature Conservation, Wageningen University & Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
- Department of Microbial Ecology, Netherlands Institute for Ecology (NIOO-KNAW), P.O. Box 50, 6700 AB Wageningen, The Netherlands
| | - P Manimohan
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - P A S Marbach
- Recôncavo da Bahia Federal University, Bahia, Brazil
| | - P Marinho
- Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - T S Marney
- Queensland Plant Pathology Herbarium, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - G Marques
- CITAB-University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
| | - M P Martín
- Departamento de Micología, Real Jardín Botánico RJB-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - A N Miller
- University of Illinois Urbana-Champaign, Illinois Natural History Survey, 1816 South Oak Street, Champaign, Illinois, 61820, USA
| | - F Mondello
- Via B. da Neocastro, 26, 98123 Messina, Italy
| | - G Moreno
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Ciencias de la Vida (Botánica). 28805 Alcalá de Henares, Madrid, Spain
| | - K T Mufeeda
- Forest Pathology Department, Forest Health Division, KSCSTE-Kerala Forest Research Institute, Peechi - 680653, Thrissur, Kerala, India
| | - H Y Mun
- Fungal Research Team, Microbial Research Department, Nakdonggang National Institute of Biological Resources, Korea
| | - T Nau
- Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany
| | - T Nkomo
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - A Okrasińska
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, ul. Zwirki i Wigury 101, 02-089 Warsaw, Poland
| | | | - R L Oliveira
- Programa de Pós-Graduação em Sistemática e Evolução, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Av. Senador Salgado Filho, 3000, 59072-970, Natal, Rio Grande do Norte, Brazil
| | - D A Ortiz
- Universidad San Francisco de Quito USFQ, Galapagos Science Center GSC, San Cristóbal 200101, Galápagos, Ecuador
| | - J Pawłowska
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, ul. Zwirki i Wigury 101, 02-089 Warsaw, Poland
| | | | - A R Podile
- Department of Plant Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - A Portugal
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, 3004-531 Coimbra, Portugal
- Fitolab - Laboratory for Phytopathology, Instituto Pedro Nunes, 3030-199 Coimbra, Portugal
| | - N Privitera
- Associazione Micologica Bresadola Gruppo di Catania, Via Macallè 18, I-95125 Catania, Italy
| | - K C Rajeshkumar
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology (Fungi) group, MACS Agharkar Research Institute, GG Agharkar Road, Pune, Maharashtra State 411004, India
| | - I Rauf
- Department of Plant Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
| | - B Rian
- Natural History Museum, University of Oslo, PO Box 1172 Blindern, NO-0318 Oslo, Norway
| | | | - G F Rivas-Torres
- Universidad San Francisco de Quito USFQ, Colegio de Ciencias Biológicas y Ambientales, Diego de Robles s/n, 170901, Quito, Ecuador
- Geography, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Universidad San Francisco de Quito USFQ, Galapagos Science Center GSC, San Cristóbal 200101, Galápagos, Ecuador
| | - P Rodriguez-Flakus
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, Poland
| | | | - I Saar
- Institute of Ecology and Earth Sciences, University of Tartu, J. Liivi Street 2, 50409 Tartu, Estonia
| | - M Saba
- Department of Plant Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
| | - C D Santos
- Federal Institute of the Sertão Pernambucano, Pernambuco, Brazil
| | - P V S R N Sarma
- Department of Plant Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - J L Siquier
- Interdisciplinary Ecology Group, University of the Balearic Islands, crtra. to Valldemossa km 7.5, 07122 Mallorca, Spain
| | - S Sleiman
- Project Manager, Council of Environment, Akkar, North Lebanon
| | - M Spetik
- Mendeleum - Institute of Genetics, Mendel University in Brno, Valticka 334, Lednice, 69144, Czech Republic
| | - K R Sridhar
- Department of Biosciences, Mangalore University, Mangalagangotri, Mangalore - 574199, Karnataka, India
| | - M Stryjak-Bogacka
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, Poland
| | - K Szczepańska
- Department of Botany and Plant Ecology, Wrocław University of Environmental and Life Sciences, pl. Grunwaldzki 24a, PL-50-363 Wrocław, Poland
| | - H Taşkın
- Department of Horticulture, Faculty of Agriculture, Cukurova University, 01330 Adana, Türkiye
| | - D S Tennakoon
- Faculty of Science, Department of Biology, Chiang Mai University, 50200, Chiang Mai, Thailand
| | - D Thanakitpipattana
- BIOTEC, National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - J Trovão
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, 3004-531 Coimbra, Portugal
| | - I Türkekul
- Department of Biology, Faculty of Science and Arts, Gaziosmanpaşa University, 60010 Tokat, Türkiye
| | - A L van Iperen
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508AD Utrecht, The Netherlands
| | - P van 't Hof
- Universidad San Francisco de Quito USFQ, Colegio de Ciencias Biológicas y Ambientales, Diego de Robles s/n, 170901, Quito, Ecuador
- Universidad San Francisco de Quito USFQ, Galapagos Science Center GSC, San Cristóbal 200101, Galápagos, Ecuador
| | - G Vasquez
- Department of Biology, Geology and Environmental Science, University of Catania, Via A. Longo 19, I-95125 Catania, Italy
| | - C M Visagie
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - B D Wingfield
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - P T W Wong
- University of Sydney, Plant Breeding Institute, 107 Cobbitty Rd, Cobbitty, New South Wales, Australia
| | - W X Yang
- College of Plant Protection, Hebei Agricultural University, 289 Lingyusi Street, Baoding, Hebei Province, China
| | - M Yarar
- Department of Biotechnology, Institute of Natural and Applied Sciences, Cukurova University, 01330 Adana, Türkiye
| | - O Yarden
- Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel & Interuniversity Institute of Marine Sciences, Eilat, Israel
| | - N Yilmaz
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - N Zhang
- College of Plant Protection, Hebei Agricultural University, 289 Lingyusi Street, Baoding, Hebei Province, China
| | - Y N Zhu
- College of Plant Protection, Hebei Agricultural University, 289 Lingyusi Street, Baoding, Hebei Province, China
| | - J Z Groenewald
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508AD Utrecht, The Netherlands
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3
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Shu L, Gu J, Wang Q, Sun S, Cui Y, Fell J, Mak WS, Siegel JB, Shi J, Lye GJ, Baganz F, Hao J. The pyruvate decarboxylase activity of IpdC is a limitation for isobutanol production by Klebsiella pneumoniae. Biotechnol Biofuels 2022; 15:41. [PMID: 35501883 PMCID: PMC9063327 DOI: 10.1186/s13068-022-02144-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 04/17/2022] [Indexed: 11/15/2022]
Abstract
Background Klebsiella pneumoniae contains an endogenous isobutanol synthesis pathway. The ipdC gene annotated as an indole-3-pyruvate decarboxylase (Kp-IpdC), was identified to catalyze the formation of isobutyraldehyde from 2-ketoisovalerate. Results Compared with 2-ketoisovalerate decarboxylase from Lactococcus lactis (KivD), a decarboxylase commonly used in artificial isobutanol synthesis pathways, Kp-IpdC has an 2.8-fold lower Km for 2-ketoisovalerate, leading to higher isobutanol production without induction. However, expression of ipdC by IPTG induction resulted in a low isobutanol titer. In vitro enzymatic reactions showed that Kp-IpdC exhibits promiscuous pyruvate decarboxylase activity, which adversely consume the available pyruvate precursor for isobutanol synthesis. To address this, we have engineered Kp-IpdC to reduce pyruvate decarboxylase activity. From computational modeling, we identified 10 amino acid residues surrounding the active site for mutagenesis. Ten designs consisting of eight single-point mutants and two double-point mutants were selected for exploration. Mutants L546W and T290L that showed only 5.1% and 22.1% of catalytic efficiency on pyruvate compared to Kp-IpdC, were then expressed in K. pneumoniae for in vivo testing. Isobutanol production by K. pneumoniae T290L was 25% higher than that of the control strain, and a final titer of 5.5 g/L isobutanol was obtained with a substrate conversion ratio of 0.16 mol/mol glucose. Conclusions This research provides a new way to improve the efficiency of the biological route of isobutanol production. Supplementary Information The online version contains supplementary material available at 10.1186/s13068-022-02144-8. Kp-IpdC is more efficient than KivD for 2-ketoisovalerate decarboxylation. Pyruvate decarboxylase activity is a limitation of Kp-IpdC. T290L variant exhibits a decreased pyruvate decarboxylase activity. Isobutanol production by K. pneumoniae T290L was improved.
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4
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Hoey RF, Medina-Aguiñaga D, Khalifa F, Ugiliweneza B, Wang D, Zdunowski S, Fell J, Naglah A, El-Baz AS, Herrity AN, Harkema SJ, Hubscher CH. Thoracolumbar epidural stimulation effects on bladder and bowel function in uninjured and chronic transected anesthetized rats. Sci Rep 2022; 12:2137. [PMID: 35136100 PMCID: PMC8826941 DOI: 10.1038/s41598-022-06011-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/18/2022] [Indexed: 11/09/2022] Open
Abstract
Pre-clinical studies have shown that spinal cord epidural stimulation (scES) at the level of pelvic and pudendal nerve inputs/outputs (L5-S1) alters storage and/or emptying functions of both the bladder and bowel. The current mapping experiments were conducted to investigate scES efficacy at the level of hypogastric nerve inputs/outputs (T13-L2) in male and female rats under urethane anesthesia. As found with L5-S1 scES, T13-L2 scES at select frequencies and intensities of stimulation produced an increase in inter-contraction interval (ICI) in non-injured female rats but a short-latency void in chronic T9 transected rats, as well as reduced rectal activity in all groups. However, the detrusor pressure during the lengthened ICI (i.e., urinary hold) remained at a low pressure and was not elevated as seen with L5-S1 scES, an effect that's critical for translation to the clinic as high fill pressures can damage the kidneys. Furthermore, T13-L2 scES was shown to stimulate voiding post-transection by increasing bladder activity while also directly inhibiting the external urethral sphincter, a pattern necessary to overcome detrusor-sphincter dyssynergia. Additionally, select scES parameters at T13-L2 also increased distal colon activity in all groups. Together, the current findings suggest that optimization of scES for bladder and bowel will likely require multiple electrode cohorts at different locations that target circuitries coordinating sympathetic, parasympathetic and somatic outputs.
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Affiliation(s)
- Robert F Hoey
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA.,Physical Medicine and Rehabilitation Department, MetroHealth Rehabilitation Institute of Ohio, Cleveland, OH, USA
| | - Daniel Medina-Aguiñaga
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Fahmi Khalifa
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - Beatrice Ugiliweneza
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.,Department of Health Management and Systems Science, School of Public Health and Information Science, University of Louisville, Louisville, KY, USA
| | - Dengzhi Wang
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Sharon Zdunowski
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Jason Fell
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Ahmed Naglah
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - Ayman S El-Baz
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - April N Herrity
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Susan J Harkema
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Charles H Hubscher
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA. .,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.
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5
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Koehler Leman J, Lyskov S, Lewis SM, Adolf-Bryfogle J, Alford RF, Barlow K, Ben-Aharon Z, Farrell D, Fell J, Hansen WA, Harmalkar A, Jeliazkov J, Kuenze G, Krys JD, Ljubetič A, Loshbaugh AL, Maguire J, Moretti R, Mulligan VK, Nance ML, Nguyen PT, Ó Conchúir S, Roy Burman SS, Samanta R, Smith ST, Teets F, Tiemann JKS, Watkins A, Woods H, Yachnin BJ, Bahl CD, Bailey-Kellogg C, Baker D, Das R, DiMaio F, Khare SD, Kortemme T, Labonte JW, Lindorff-Larsen K, Meiler J, Schief W, Schueler-Furman O, Siegel JB, Stein A, Yarov-Yarovoy V, Kuhlman B, Leaver-Fay A, Gront D, Gray JJ, Bonneau R. Ensuring scientific reproducibility in bio-macromolecular modeling via extensive, automated benchmarks. Nat Commun 2021; 12:6947. [PMID: 34845212 PMCID: PMC8630030 DOI: 10.1038/s41467-021-27222-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 11/02/2021] [Indexed: 01/14/2023] Open
Abstract
Each year vast international resources are wasted on irreproducible research. The scientific community has been slow to adopt standard software engineering practices, despite the increases in high-dimensional data, complexities of workflows, and computational environments. Here we show how scientific software applications can be created in a reproducible manner when simple design goals for reproducibility are met. We describe the implementation of a test server framework and 40 scientific benchmarks, covering numerous applications in Rosetta bio-macromolecular modeling. High performance computing cluster integration allows these benchmarks to run continuously and automatically. Detailed protocol captures are useful for developers and users of Rosetta and other macromolecular modeling tools. The framework and design concepts presented here are valuable for developers and users of any type of scientific software and for the scientific community to create reproducible methods. Specific examples highlight the utility of this framework, and the comprehensive documentation illustrates the ease of adding new tests in a matter of hours.
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Affiliation(s)
- Julia Koehler Leman
- Center for Computational Biology, Flatiron Institute, Simons Foundation, New York, NY, 10010, USA.
- Department of Biology, New York University, New York, NY, 10003, USA.
| | - Sergey Lyskov
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Steven M Lewis
- Cyrus Biotechnology, 1201 Second Ave, Suite 900, Seattle, WA, 98101, USA
| | - Jared Adolf-Bryfogle
- Department of Immunology and Microbiology, Scripps Research, La Jolla, CA, 92037, USA
- IAVI Neutralizing Antibody Center, Scripps Research, La Jolla, CA, 92037, USA
| | - Rebecca F Alford
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Kyle Barlow
- Graduate Program in Bioinformatics, University of California San Francisco, San Francisco, CA, 94158, USA
| | - Ziv Ben-Aharon
- Department of Microbiology and Molecular Genetics, Hebrew University, Hadassah Medical School, POB 12272, Jerusalem, 91120, Israel
| | - Daniel Farrell
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA
- Institute for Protein Design, University of Washington, Seattle, WA, 98195, USA
| | - Jason Fell
- Genome Center, University of California, Davis, CA, 95616, USA
- Department of Biochemistry & Molecular Medicine, University of California, Davis, CA, 95616, USA
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - William A Hansen
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ, 08904, USA
- Institute for Quantitative Biomedicine, Rutgers, The State University of New Jersey, Piscataway, NJ, 08904, USA
| | - Ameya Harmalkar
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Jeliazko Jeliazkov
- Program in Molecular Biophysics, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Georg Kuenze
- Department of Chemistry, Vanderbilt University, Nashville, TN, 37235, USA
- Center for Structural Biology, Vanderbilt University, Nashville, TN, 37235, USA
- Institute for Drug Discovery, Medical School, Leipzig University, 04103, Leipzig, Germany
| | - Justyna D Krys
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Ajasja Ljubetič
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA
- Institute for Protein Design, University of Washington, Seattle, WA, 98195, USA
| | - Amanda L Loshbaugh
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, CA, 94158, USA
- Biophysics Graduate Program, University of California San Francisco, San Francisco, CA, 94158, USA
| | - Jack Maguire
- Program in Bioinformatics and Computational Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Rocco Moretti
- Department of Chemistry, Vanderbilt University, Nashville, TN, 37235, USA
- Center for Structural Biology, Vanderbilt University, Nashville, TN, 37235, USA
| | - Vikram Khipple Mulligan
- Center for Computational Biology, Flatiron Institute, Simons Foundation, New York, NY, 10010, USA
| | - Morgan L Nance
- Program in Molecular Biophysics, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Phuong T Nguyen
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, 95616, USA
| | - Shane Ó Conchúir
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, CA, 94158, USA
| | - Shourya S Roy Burman
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Rituparna Samanta
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Shannon T Smith
- Center for Structural Biology, Vanderbilt University, Nashville, TN, 37235, USA
- Chemical and Physical Biology Program, Vanderbilt University, Nashville, TN, 37235, USA
| | - Frank Teets
- Department of Bioochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27516, USA
| | - Johanna K S Tiemann
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, DK-2200, Copenhagen N., Denmark
| | - Andrew Watkins
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Hope Woods
- Center for Structural Biology, Vanderbilt University, Nashville, TN, 37235, USA
- Chemical and Physical Biology Program, Vanderbilt University, Nashville, TN, 37235, USA
| | - Brahm J Yachnin
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ, 08904, USA
- Institute for Quantitative Biomedicine, Rutgers, The State University of New Jersey, Piscataway, NJ, 08904, USA
| | - Christopher D Bahl
- Institute for Protein Innovation, Boston, MA, 02115, USA
- Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, 02115, USA
| | | | - David Baker
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA
- Institute for Protein Design, University of Washington, Seattle, WA, 98195, USA
| | - Rhiju Das
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Frank DiMaio
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA
- Institute for Protein Design, University of Washington, Seattle, WA, 98195, USA
| | - Sagar D Khare
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ, 08904, USA
- Institute for Quantitative Biomedicine, Rutgers, The State University of New Jersey, Piscataway, NJ, 08904, USA
| | - Tanja Kortemme
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, CA, 94158, USA
- Biophysics Graduate Program, University of California San Francisco, San Francisco, CA, 94158, USA
| | - Jason W Labonte
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Kresten Lindorff-Larsen
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, DK-2200, Copenhagen N., Denmark
| | - Jens Meiler
- Department of Chemistry, Vanderbilt University, Nashville, TN, 37235, USA
- Center for Structural Biology, Vanderbilt University, Nashville, TN, 37235, USA
- Institute for Drug Discovery, Medical School, Leipzig University, 04103, Leipzig, Germany
| | - William Schief
- Department of Immunology and Microbiology, Scripps Research, La Jolla, CA, 92037, USA
- IAVI Neutralizing Antibody Center, Scripps Research, La Jolla, CA, 92037, USA
| | - Ora Schueler-Furman
- Department of Microbiology and Molecular Genetics, Hebrew University, Hadassah Medical School, POB 12272, Jerusalem, 91120, Israel
| | - Justin B Siegel
- Genome Center, University of California, Davis, CA, 95616, USA
- Department of Biochemistry & Molecular Medicine, University of California, Davis, CA, 95616, USA
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Amelie Stein
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, DK-2200, Copenhagen N., Denmark
| | - Vladimir Yarov-Yarovoy
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, 95616, USA
| | - Brian Kuhlman
- Department of Bioochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27516, USA
| | - Andrew Leaver-Fay
- Department of Bioochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27516, USA
| | - Dominik Gront
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Jeffrey J Gray
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA.
| | - Richard Bonneau
- Center for Computational Biology, Flatiron Institute, Simons Foundation, New York, NY, 10010, USA.
- Department of Biology, New York University, New York, NY, 10003, USA.
- Department of Computer Science, New York University, New York, NY, 10003, USA.
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6
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Hoey RF, Medina-Aguiñaga D, Khalifa F, Ugiliweneza B, Zdunowski S, Fell J, Naglah A, El-Baz AS, Herrity AN, Harkema SJ, Hubscher CH. Bladder and bowel responses to lumbosacral epidural stimulation in uninjured and transected anesthetized rats. Sci Rep 2021; 11:3268. [PMID: 33558526 PMCID: PMC7870824 DOI: 10.1038/s41598-021-81822-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 01/12/2021] [Indexed: 01/09/2023] Open
Abstract
Spinal cord epidural stimulation (scES) mapping at L5-S1 was performed to identify parameters for bladder and bowel inhibition and/or contraction. Using spinally intact and chronic transected rats of both sexes in acute urethane-anesthetized terminal preparations, scES was systematically applied using a modified Specify 5-6-5 (Medtronic) electrode during bladder filling/emptying cycles while recording bladder and colorectal pressures and external urethral and anal sphincter electromyography activity. The results indicate frequency-dependent effects on void volume, micturition, bowel peristalsis, and sphincter activity just above visualized movement threshold intensities that differed depending upon neurological intactness, with some sex-dependent differences. Thereafter, a custom-designed miniature 15-electrode array designed for greater selectivity was tested and exhibited the same frequency-dependent urinary effects over a much smaller surface area without any concurrent movements. Thus, select activation of autonomic nervous system circuitries with scES is a promising neuromodulation approach for expedient translation to individuals with SCI and potentially other neurologic disorders.
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Affiliation(s)
- Robert F Hoey
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, MDR, 511 S. Floyd St., Room 111, Louisville, KY, 40202, USA
| | - Daniel Medina-Aguiñaga
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, MDR, 511 S. Floyd St., Room 111, Louisville, KY, 40202, USA
| | - Fahmi Khalifa
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - Beatrice Ugiliweneza
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA
| | - Sharon Zdunowski
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Jason Fell
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, MDR, 511 S. Floyd St., Room 111, Louisville, KY, 40202, USA
| | - Ahmed Naglah
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - Ayman S El-Baz
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - April N Herrity
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Susan J Harkema
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Charles H Hubscher
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, MDR, 511 S. Floyd St., Room 111, Louisville, KY, 40202, USA.
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.
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7
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Derner M, Dehnen G, Chaieb L, Reber TP, Borger V, Surges R, Staresina BP, Mormann F, Fell J. Patterns of single-neuron activity during associative recognition memory in the human medial temporal lobe. Neuroimage 2020; 221:117214. [PMID: 32755669 DOI: 10.1016/j.neuroimage.2020.117214] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 10/23/2022] Open
Abstract
Electrophysiological activity in medial temporal lobe (MTL) structures is pivotal for declarative long-term memory. Single-neuron and microcircuit findings capitalizing on human microwire recordings from the medial temporal lobe are still fragmentary. In particular, it is an open question whether identical or different groups of neurons participate in different memory functions. Here, we investigated category-specific responses in the human MTL based on single-neuron recordings in presurgical epilepsy patients performing an associative long-term memory task. Additionally, auditory beat stimuli were presented during encoding and retrieval to modulate memory performance. We describe the proportion of neurons in amygdala, entorhinal cortex, hippocampus and parahippocampal cortex belonging to different response classes. These entail neurons coding stimulus-familiarity, neurons coding successful item memory, and neurons coding associated source memory, as well as the overlap between these classes. As major results we demonstrate that neurons responding to stimulus familiarity (old/new effect) can be identified in the MTL even when using previously known rather than entirely novel stimulus material (words). We observed a significant overlap between familiarity-related neurons and neurons coding item retrieval (remembered/forgotten effect). The largest fraction of familiarity-related neurons was found in the parahippocampal cortex, and a considerable fraction of all parahippocampal neurons was related to successful item retrieval. Neurons related to successful source retrieval were different from the neurons coding the associated information. Most importantly, there was no overlap between neurons coding item memory and those coding associated source memory strongly suggesting that these functions are facilitated by different sets of neurons.
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Affiliation(s)
- M Derner
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - G Dehnen
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - L Chaieb
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - T P Reber
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; Faculty of Psychology, Swiss Distance University Institute, Ueberlandstr. 12, 3900 Brig, Switzerland
| | - V Borger
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - R Surges
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - B P Staresina
- School of Psychology & Centre for Human Brain Health, University of Birmingham, Birmingham, B15 2TT, United Kingdom
| | - F Mormann
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - J Fell
- Department of Epileptology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany.
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Zadow E, Adams M, Wu S, Kitic C, Singh I, Kundur A, Bost N, Johnston A, Crilly J, Bulmer A, Halson S, Fell J. Too clot or not too clot? The influence of travel, marathon running and compression socks on blood clot risk. J Sci Med Sport 2018. [DOI: 10.1016/j.jsams.2018.09.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Laidlaw G, Sheu A, Fell J, Triana B, Goettl C, Shah R. Abstract No. 471 Development of a femoral vascular access curriculum: training medical students and residents for safe, real-world vascular access. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Affiliation(s)
- R Gupta
- Department of Paediatric Gastroenterology, Chelsea and Westminster Hospital, London
| | - M Brueton
- Department of Paediatric Gastroenterology, Chelsea and Westminster Hospital, London
| | - J Fell
- Department of Paediatric Gastroenterology, Chelsea and Westminster Hospital, London
| | - H Lyall
- Department of Paediatric Infectious Diseases, Imperial College School of Medicine, London, UK
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Mclaine S, Fell J, Bird M. Is shoulder strength related to the development of shoulder pain in swimmers? J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.09.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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McLaine S, Ginn K, Fell J, Bird M. Scapular upward rotation position: Variable but symmetrical in swimmers without current shoulder pain. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.09.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zadow E, Kitic C, Wu S, Fell J, Adams M. Does time of day and short-duration high-intensity exercise effect haemostasis? J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.09.282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hansen N, Chaieb L, Staresina B, Hampel K, Elger C, Surges R, Axmacher N, Fell J. Memory encoding-related anterior hippocampal potentials are modulated by electric deep brain stimulation of the entorhinal area. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Fell J, Lis D, Kitic C, Ahuja K, Stellingwerff T. FODMAP removal in athletes: An online survey of specific food avoidance and associated symptoms in athletes. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2016.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zadow E, Kitic C, Wu S, Abbiss C, Peiffer J, Fell J. Time of day has no influence on performance and pacing during a 4km cycling time trial. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.01.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Byrne L, Ogden K, Fell J, Watson G, Lee S, Ahuja K, Bauman A. The effects of a community-wide, multi-strategy intervention on physical activity participation in Launceston, Tasmania. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.01.210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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van de Nieuwenhuijzen ME, Axmacher N, Fell J, Oehrn CR, Jensen O, van Gerven MAJ. Decoding of task-relevant and task-irrelevant intracranial EEG representations. Neuroimage 2016; 137:132-139. [PMID: 27153977 DOI: 10.1016/j.neuroimage.2016.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/31/2016] [Accepted: 05/02/2016] [Indexed: 11/27/2022] Open
Abstract
Natural stimuli consist of multiple properties. However, not all of these properties are equally relevant in a given situation. In this study, we applied multivariate classification algorithms to intracranial electroencephalography data of human epilepsy patients performing an auditory Stroop task. This allowed us to identify neuronal representations of task-relevant and irrelevant pitch and semantic information of spoken words in a subset of patients. When properties were relevant, representations could be detected after about 350ms after stimulus onset. When irrelevant, the association with gamma power differed for these properties. Patients with more reliable representations of irrelevant pitch showed increased gamma band activity (35-64Hz), suggesting that attentional resources allow an increase in gamma power in some but not all patients. This effect was not observed for irrelevant semantics, possibly because the more automatic processing of this property allowed for less variation in free resources. Processing of different properties of the same stimulus seems therefore to be dependent on the characteristics of the property.
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Affiliation(s)
- M E van de Nieuwenhuijzen
- Radboud University, Donders Institute for Brain, Cognition and Behaviour, 6500 HE, Nijmegen, The Netherlands.
| | - N Axmacher
- Department of Neuropsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, D-44801 Bochum, Germany; German Center for Neurodegenerative Diseases, D-53175 Bonn, Germany
| | - J Fell
- Department of Epileptology, University of Bonn, D-53105 Bonn, Germany
| | - C R Oehrn
- Department of Epileptology, University of Bonn, D-53105 Bonn, Germany
| | - O Jensen
- Radboud University, Donders Institute for Brain, Cognition and Behaviour, 6500 HE, Nijmegen, The Netherlands
| | - M A J van Gerven
- Radboud University, Donders Institute for Brain, Cognition and Behaviour, 6500 HE, Nijmegen, The Netherlands
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Axmacher N, Leszczynski M, Fell J. Cross-frequency coupling and memory. Clin Neurophysiol 2016. [DOI: 10.1016/j.clinph.2015.11.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Affiliation(s)
- R Voas
- Pacific Institute for Research and Evaluation, 11720 Beltsville Drive, Suite 900, Calverton, Maryland, 20705, USA.
| | - J Fell
- Pacific Institute for Research and Evaluation, 11720 Beltsville Drive, Suite 900, Calverton, Maryland, 20705, USA
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Kunz L, Schroder TN, Lee H, Montag C, Lachmann B, Sariyska R, Reuter M, Stirnberg R, Stocker T, Messing-Floeter PC, Fell J, Doeller CF, Axmacher N. Reduced grid-cell-like representations in adults at genetic risk for Alzheimer's disease. Science 2015; 350:430-3. [DOI: 10.1126/science.aac8128] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Lee H, Kuhn J, Hardenacke K, Gruendler T, Schueller T, Sturm V, Fell J, Axmacher N. Effects of deep brain stimulation of the nucleus basalis of Meynert in EEG resting-state oscillatory power and phase synchronization. Brain Stimul 2015. [DOI: 10.1016/j.brs.2015.01.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Lis D, Fell J, Shing C, Stellingwerff T. Athletes and gluten-free diets: Exploring the popularly, experiences and beliefs of this diet in non-coeliac athletes. J Sci Med Sport 2013. [DOI: 10.1016/j.jsams.2013.10.158] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Fungi are found in all aerobic ecosystems, colonizing a diversity of substrates and performing a wide diversity of functions, some of which are not well understood. Many spices of fungi are cosmopolitan and generalists or habitats. Unusual fungal niches are habitats where extreme conditions would be expected to prevent the development of a mycobiota. In this review we describe five unusual fungal habitats in which fungi occupy poorly understood niches: Antarctic dry valleys, high Arctic glaciers, salt flats and salterns, hypersaline microbial mats and plant trichomes. Yeasts, black yeast-like fungi, melanized filamentous species as well as representatives of Aspergillus and Penicillium seem to be dominant among the mycobiota adapted to cold and saline niches. Plant trichomes appear to be a taxa. The advent of new sequencing technologies is helping to elucidate the microbial diversity in many ecosystems, but more studies are needed to document the functional role of fungi in the microbial communities thriving in these unusual environments.
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Affiliation(s)
- S A Cantrell
- School of Scinence and Technology, Universidad del Turabo, Gurabo, Puerto Rico 00778.
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Abstract
Objectives This pilot study describes the physiological attributes of jockeys and track-work riders in Tasmania and investigates whether these attributes are associated with falls. Methods All jockeys and track-work riders licensed in Tasmania were invited to participate. The study group consisted of eight jockeys (two female, six male) and 20 track-work riders (14 female, six male). Measures of anthropometry, balance, reaction time, isometric strength, vertical jump, glycolytic and aerobic fitness, flexibility and body composition were conducted. Tests were designed to assess specific aspects of rider fitness and performance relevant to horse racing. For a subset of participants (n=14), the authors obtained information on falls and injuries. The authors used Poisson regression to estimate incidence rate ratios. Results Jockeys had better balance, a faster mean reaction time, a lower fatigue index and a higher estimated $${\stackrel{.}{\hbox{ V }}\hbox{ O }}_{2\hbox{ max }}$$ than their track-work riding counterparts. Jockeys were also younger and smaller in stature than track-work riders, and when differences in body mass were taken into account, they had a greater muscular strength and muscular (alactic) power. Important factors found to be associated with falls were lower aerobic and anaerobic fitness, greater muscular strength and power, and riding with the full foot in the stirrup irons compared with riding on the ball of the foot. Conclusion This pilot study shows that physiological attributes of jockeys and track-work riders can predict their risk of falling and are measurable using methods feasible for large-scale fieldwork.
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Affiliation(s)
- P Hitchens
- Menzies Research Institute, University of Tasmania, Hobart, Tasmania, Australia
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Hitchens P, Blizzard L, Jones G, Day L, Fell J. Predictors of race-day jockey falls in jumps racing in Australia. Accid Anal Prev 2011; 43:840-847. [PMID: 21376874 DOI: 10.1016/j.aap.2010.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 11/01/2010] [Accepted: 11/01/2010] [Indexed: 05/30/2023]
Abstract
Thoroughbred jumps racing jockeys have a fall rate greater than their flat racing counterparts. Previous studies have focused on factors that contribute to falls by horses but, to date, there has not been a study of risk factors for falls to jockeys in jumps races. Data on race-day falls were extracted from stipendiary stewards reports lodged with Principal Racing Authorities following each race meeting. Denominator data were provided by Racing Information Services Australia on races conducted from August 2002 until July 2009. Univariable and multivariable analyses, estimating incidence rate ratios, were conducted using Poisson regression. In multivariable analysis in hurdle racing, important predictors of falls were higher club level, larger field size, greater prize money, provisionally licensed jockeys and older jockeys. There were significant interactions between jockey licence and prize money; jockey age and previous rides this meeting; race grade and race distance; horse age and field size; and club level and field size. In steeplechase racing, important predictors were type of jump with lowest fall rates in races over Mark III jumps compared to standard fences, provisionally licensed jockeys, jockeys having had previous rides at a meeting, and larger field size. There were significant interactions between the number of previous starts by the horse and field size; race distance and prize money; and race distance and previous rides this meeting. This study has identified factors for falls in jumps racing that could form the basis for targeted strategies to improve occupational health and safety standards.
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Affiliation(s)
- P Hitchens
- Menzies Research Institute, University of Tasmania, Private Bag 23, Hobart TAS 7001, Australia
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Scott D, Blizzard L, Fell J, Jones G. Prospective associations between ambulatory activity, body composition and muscle function in older adults. Scand J Med Sci Sports 2010; 21:e168-75. [DOI: 10.1111/j.1600-0838.2010.01229.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Axmacher N, Fell J. Gedächtnisprozesse im medialen Temporallappen: Jenseits des Langzeitgedächtnisses. KLIN NEUROPHYSIOL 2010. [DOI: 10.1055/s-0030-1252030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
BACKGROUND Statin therapy can cause myopathy, however it is unclear whether this exacerbates age-related muscle function declines. AIM To describe differences between statin users and non-users in muscle mass, muscle function and falls risk in a group of community-dwelling older adults. DESIGN A prospective, population-based cohort study with a mean follow-up of 2.6 years. METHODS Total 774 older adults [48% female; mean (standard deviation) age = 62 (7) years] were examined at baseline and follow-up. Differences in percentage appendicular lean mass (%ALM), leg strength, leg muscle quality (LMQ; specific force) and falls risk were compared for statin users and non-users. RESULTS There were 147 (19%) statin users at baseline and 179 (23%) at follow-up. Longitudinal analyses revealed statin use at baseline predicted increased falls risk scores over 2.6 years (0.14, 95% CI 0.01 to 0.27) and a trend towards increased %ALM (0.45%, 95% CI -0.01 to 0.92). Statin users at both time points demonstrated decreased leg strength (-5.02 kg, 95% CI -9.65 to -0.40) and LMQ (-0.30 kg/kg, 95% CI -0.59 to -0.01), and trended towards increased falls risk (0.13, 95% CI -0.01 to 0.26) compared to controls. Finally, statin users at both baseline and follow-up demonstrated decreased leg strength (-16.17 kg, 95% CI -30.19 to -2.15) and LMQ (-1.13 kg/kg, 95% CI -2.02 to -0.24) compared to those who had ceased statin use at follow-up. CONCLUSION Statin use may exacerbate muscle performance declines and falls risk associated with aging without a concomitant decrease in muscle mass, and this effect may be reversible with cessation.
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Affiliation(s)
- D Scott
- Menzies Research Institute, University of Tasmania, Hobart, Tasmania, 7001, Australia.
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Fell J, Reaburn P, Harrison GJ. Altered perception and report of fatigue and recovery in veteran athletes. J Sports Med Phys Fitness 2008; 48:272-277. [PMID: 18427425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
AIM This study investigated whether ageing effects perceived and reported ratings of fatigue and total quality of recovery following high-intensity training in athletes. We hypothesized that veteran (V) athletes would report greater changes in perceived measures of fatigue and recovery than training-matched younger athletes. METHODS Perceptions of muscle soreness (SOR), fatigue, and recovery were recorded in young (Y) and V (>35 years) well-trained cyclists in response to 3 days of repeated cycling time trials. Nine Y (24+/-5 years) and 9 V (45+/-6 years) cyclists performed 3 consecutive days (T1-T3) of 30-min cycling time trials (TT30) intended to induce fatigue leading to decreased performance. Physiological and performance variables were measured before, during, and after each time trial. Subjective measures of SOR, fatigue, and recovery were recorded each day. RESULTS There was no change in performance at the TT30 from T1 to T3 for either group. SOR, fatigue, and recovery significantly changed over the 3 days in the V group, but not in the Y group. The change in SOR from T1 to T3 was significantly greater in the V group than in the Y group (22+/-14 mm vs 9+/-12 mm, respectively; P=0.04). CONCLUSION It was concluded that 3 days of cycling time trials induce perceptions of muscle pain/SOR, fatigue and reduced recovery in well-trained V cyclists with no corresponding decline in physical performance.
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Affiliation(s)
- J Fell
- School of Human Life Sciences, Faculty of Health Sciences, University of Tasmania, Launceston, Tasmania, Australia.
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Vogel C, Rogerson A, Schatz S, Laubach H, Tallman A, Fell J. Prevalence of yeasts in beach sand at three bathing beaches in South Florida. Water Res 2007; 41:1915-20. [PMID: 17382990 PMCID: PMC9789725 DOI: 10.1016/j.watres.2007.02.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Revised: 01/31/2007] [Accepted: 02/06/2007] [Indexed: 05/11/2023]
Abstract
The abundance and types of yeasts in the wet and dry sand of three recreational beaches in South Florida were determined. Samples were collected on 17 occasions between August 2001 and July 2002. After analyzing 102 sand samples, a total of 21 yeast species were identified by molecular methods. These isolates comprised four Basidiomycetes and 17 Ascomycetes and included eight species that had previously been reported from humans. The most frequently encountered yeasts were Candida tropicalis and Rhodotorula mucilaginosa. A greater diversity of species (16 species) was found in the dry sand above the high tide mark compared with the wet sand in the intertidal zone (11 species). Densities were also highest in the dry sand relative to wet sand (20-fold higher at Hobie beach, 6-fold higher at Fort Lauderdale Beach and 1.3-fold higher at Hollywood beach). There were no clear temporal patterns in the data and overall densities were greatest at the busiest bathing beach (Hobie Beach) where total yeasts averaged 37,720 cfu 100g(-1) dry sand and 1852 cfu 100 g(-1) in the wet sand. This concentration of yeast was significantly higher than populations at the less populated beaches. Fort Lauderdale beach had a mean count of 4130 cfu 100 g(-1) dry sand and 705 cfu 100g(-1) in the wet sand while the least populated beach, Hollywood Beach averaged 1945 cfu 100g(-1) dry sand and 1483 cfu 100g(-1) wet sand. While definitive statements cannot be made, high levels of yeasts may have a deleterious bearing on human health and the presence of such a diverse aggregation of species suggests that yeasts could have a role as indicators of beach health.
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Affiliation(s)
- C. Vogel
- SUNY, Marine Sciences Research Center, Stony Brook, NY 11794-5000, USA
| | - A. Rogerson
- College of Science, Marshall University, One Marshall Drive, Huntington, WV 25755, USA
| | - S. Schatz
- College of Optometry, Health Profession Division of Nova Southeastern University, 3200 S University Drive, Ft. Lauderdale, FL 33328, USA
- Oceanographic Center of Nova Southeastern University, 8000 N, Ocean Drive, Dania Beach, FL 33004, USA
- Corresponding author. College of Optometry, Nova Southeastern University, 3200 S University Drive, Ft. Lauderdale, FL 33328, USA. Tel.: +1 954 423 8282; fax: +1 954 262 1818. E-mail address: (S. Schatz)
| | - H. Laubach
- College of Medical Sciences, Health Profession Division of Nova Southeastern University, 3200 S University Drive, Ft. Lauderdale, FL 33328, USA
| | - A. Tallman
- School of Marine and Atmospheric Science, University of Miami, 4600 Rickernbacker Causeway, Miami, FL 33149, USA
| | - J. Fell
- School of Marine and Atmospheric Science, University of Miami, 4600 Rickernbacker Causeway, Miami, FL 33149, USA
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Axmacher N, Mormann F, Fernández G, Elger C, Fell J. Working memory recruits mediotemporal networks: A combined intracranial EEG and fMRI study. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2006.11.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fell J, Haseler L, Gaffney P, Reaburn P, Harrison G. Performance during consecutive days of laboratory time-trials in young and veteran cyclists. J Sports Med Phys Fitness 2006; 46:395-402. [PMID: 16998443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
AIM There is a common belief amongst athletes and coaches that older athletes need longer recovery time between training sessions and following competition. This study was undertaken to investigate the influence of age on recovery from high intensity endurance exercise in well-trained cyclists. METHODS Nine young and 9 veteran cyclists (mean+/-SD: young 24+/-5 years, veteran 45+/-6 years) performed 3 consecutive days (T1-T3) of laboratory based cycling time trials of 30-min duration (TT30). Mean power output, heart rate (HR), and blood lactate were measured throughout each TT30. Non-specific performance tests of fatigue were undertaken before and after the TT30 on each test day. Non-specific tests included, a maximal voluntary isometric contraction of the quadriceps muscle (MVIF), a countermovement jump (CMJ), a 10-s cycle sprint (10ST), and serum creatine kinase activity (CK). RESULTS Statistical analysis revealed that there were no significant group differences between young and veteran subjects for initial fitness or training status. Over T1-T3 both groups maintained average power during the TT30 (young and veteran results combined; 3.49+/-0.38, 3.5+/-0.36 and 3.52+/-0.35 W x kg(-1), T1-T3, respectively). For both groups serum CK activity was significantly elevated at T2 and T3, and mean HR during the TT30 was significantly lower at T3 (approximately 3 b x min(-1)). There were no group differences or significant within group interactions across the 3 days for MVIF or 10ST but there was a significantly lower CMJ height by T3 in both young and veteran (approximately 3%). MVIF was significantly lower after TT30 each day but had fully recovered by the following day. CONCLUSIONS These findings suggest that high-intensity endurance performance is maintained in both well-trained young and veteran cyclists following 3 consecutive days of maximal 30-min laboratory time trials.
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Affiliation(s)
- J Fell
- School of Medical Science, Faculty of Health Sciences, Griffith University, Gold Coast, Queensland, Australia.
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Trautner P, Rosburg T, Dietl T, Fell J, Korzyukov OA, Kurthen M, Schaller C, Elger CE, Boutros NN. Sensory gating of auditory evoked and induced gamma band activity in intracranial recordings. Neuroimage 2006; 32:790-8. [PMID: 16809054 DOI: 10.1016/j.neuroimage.2006.04.203] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Revised: 03/10/2006] [Accepted: 04/03/2006] [Indexed: 11/24/2022] Open
Abstract
Oscillatory activity in the gamma band range (30-50 Hz) and its functional relation to auditory evoked potentials (AEPs) is yet poorly understood. In the current study, we capitalized on the advantage of intracranial recordings and studied gamma band activity (GBA) in an auditory sensory gating experiment. Recordings were obtained from the lateral surface of the temporal lobe in 34 epileptic patients undergoing presurgical evaluation. Two kinds of activity were differentiated: evoked (phase locked) and induced (not phase locked) GBA. In 18 patients, an intracranial P50 was observed. At electrodes with maximal P50, evoked GBA occurred with a similar peak latency as the P50. However, the intensities of P50 and evoked GBA were only modestly correlated, suggesting that the intracranial P50 does not represent a subset of evoked GBA. The peak frequency of the intracranial evoked GBA was on average relatively low (approximately 25 Hz) and is, therefore, probably not equivalent to extracranially recorded GBA which has normally a peak frequency of approximately 40 Hz. Induced GBA was detected in 10 subjects, nearly exclusively in the region of the superior temporal lobe. The induced GBA was increased after stimulation for several hundred milliseconds and encompassed frequencies up to 200 Hz. Single-trial analysis revealed that induced GBA occurred in relatively short bursts (mostly <<100 ms), indicating that the duration of the induced GBA in the averages originates from summation effects. Both types of gamma band activity showed a clear attenuation with stimulus repetition.
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Affiliation(s)
- P Trautner
- Department of Epileptology, University of Bonn, Sigmund-Freud-Str. 25, D-53115 Bonn, Germany.
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Axmacher N, Mormann F, Fernández G, Elger CE, Fell J. Working memory recruits mediotemporal networks: A combined intracranial EEG and fMRI study. KLIN NEUROPHYSIOL 2006. [DOI: 10.1055/s-2006-939086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Fell J, Widman G, Rehberg B, Elger CE, Fernández G. Human mediotemporal EEG characteristics during propofol anesthesia. Biol Cybern 2005; 92:92-100. [PMID: 15685392 DOI: 10.1007/s00422-004-0538-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Accepted: 11/24/2004] [Indexed: 05/24/2023]
Abstract
Evidence for a response-control-related kind of declarative memory during deep propofol anesthesia has recently been reported. Connectivity within the mediotemporal lobe (MTL), and in particular rhinal-hippocampal synchronization within the gamma band, has been shown to be crucial for declarative memory formation. Thus, we analyzed EEG recordings obtained from the scalp, as well as directly from within the hippocampus and from the anterior parahippocampal gyrus, which is covered by rhinal cortex, in patients with unilateral temporal lobe epilepsy during propofol anesthesia, which preceded electrode explantation. For the gamma band a power decrease starting with induction of anesthesia was observed at scalp position Cz, but a power increase was detected at MTL locations. In contrast to prior results for sleep recordings, rhinal-hippocampal coherence did not decrease within the gamma band at deeper levels of anesthesia. These findings may represent an indirect electrophysiological correlate of partially intact declarative memory formation during deep propofol sedation. Furthermore, we investigated how well the plasma propofol level, as well as different stages of anesthesia including the burst suppression phase, could be monitored by different spectral as well as by nonlinear EEG measures. We observed that conventional spectral power measures, most prominently those recorded from mediotemporal locations, are most closely correlated with the plasma propofol level, whereas different stages of anesthesia can be distinguished best by nonconventional spectral as well as nonlinear measures.
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Affiliation(s)
- J Fell
- Department of Epileptology, University of Bonn, Germany.
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Affiliation(s)
- R Gupta
- Department of Paediatric Gastroenterology, Chelsea and Westminster Hospital, London, UK.
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45
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Afzal N, Brueton M, Fell J, Baker A. Portal Vein Thrombosis and Pancreatic Failure. Int J Gastrointest Cancer 2003; 29:107-112. [PMID: 12754394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 07/08/2001] [Revised: 08/20/2001] [Accepted: 08/20/2001] [Indexed: 03/02/2023]
Abstract
We report a case of a child with portal vein thrombosis presenting with protein losing enteropathy. Helater developed exocrine and endocrine pancreatic failure. This association has not been reported before.
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Affiliation(s)
- N Afzal
- Centre for Pediatric Gastroenterology, Royal Free Hospital, Pond Street, Hampstead, London, UK NW3 2QG
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Fernández G, Specht K, Weis S, Tendolkar I, Reuber M, Fell J, Klaver P, Ruhlmann J, Reul J, Elger CE. Intrasubject reproducibility of presurgical language lateralization and mapping using fMRI. Neurology 2003; 60:969-75. [PMID: 12654961 DOI: 10.1212/01.wnl.0000049934.34209.2e] [Citation(s) in RCA: 188] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND fMRI is becoming a standard tool for the presurgical lateralization and mapping of brain areas involved in language processing. However, its within-subject reproducibility has yet to be fully explored. OBJECTIVE To evaluate within-test and test-retest reliability of language fMRI in consecutive patients undergoing evaluation for epilepsy surgery. METHODS Thirty-four unselected patients were investigated once (within-test reliability) and 12 patients twice (test-retest reliability). The imaging series consisted of an alternating 25-second synonym judgment condition with a 25-second letter-matching condition repeated 15 times. Reproducibility of activation maps of the first and second half of session 1 or activation maps of sessions 1 and 2 was evaluated by comparing one global and three regional lateralization indexes (Broca's area, remaining prefrontal cortex, temporoparietal area) and on a voxel-by-voxel basis (intraclass correlation coefficient, percentage overlap, correlation of t-values). RESULTS Global and regional language lateralization was achieved with high reliability within and across sessions. Reproducibility was evenly distributed across both hemispheres but not within each hemisphere. Frontal activations were more reliable than temporoparietal ones. Depending on the statistical threshold chosen, the voxel-by-voxel analysis revealed a mean overlap of activations derived from the first and second investigation of up to 48.9%. CONCLUSION Language fMRI proved sufficiently reliable for the determination of global and regional lateralization of language representation in individual unselected patients with epilepsy.
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Affiliation(s)
- G Fernández
- Department of Epileptology, University of Bonn, Germany.
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Fell J, Klaver P, Lehnertz K, Grunwald T, Schaller C, Elger CE, Fernández G. Human memory formation is accompanied by rhinal-hippocampal coupling and decoupling. Nat Neurosci 2001; 4:1259-64. [PMID: 11694886 DOI: 10.1038/nn759] [Citation(s) in RCA: 470] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In humans, distinct processes within the hippocampus and rhinal cortex support declarative memory formation. But do these medial temporal lobe (MTL) substructures directly cooperate in encoding new memories? Phase synchronization of gamma-band electroencephalogram (EEG) oscillations (around 40 Hz) is a general mechanism of transiently connecting neural assemblies. We recorded depth-EEG from within the MTL of epilepsy patients performing a memorization task. Successful as opposed to unsuccessful memory formation was accompanied by an initial elevation of rhinal-hippocampal gamma synchronization followed by a later desynchronization, suggesting that effective declarative memory formation is accompanied by a direct and temporarily limited cooperation between both MTL substructures.
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Affiliation(s)
- J Fell
- Department of Epileptology, University of Bonn, Sigmund-Freud Str. 25, D-53105 Bonn, Germany.
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Grözinger M, Fell J, Röschke J. Neural net classification of REM sleep based on spectral measures as compared to nonlinear measures. Biol Cybern 2001; 85:335-341. [PMID: 11721988 DOI: 10.1007/s004220100266] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In various studies the implementation of nonlinear and nonconventional measures has significantly improved EEG (electroencephalogram) analyses as compared to using conventional parameters alone. A neural network algorithm well approved in our laboratory for the automatic recognition of rapid eye movement (REM) sleep was investigated in this regard. Originally based on a broad range of spectral power inputs, we additionally supplied the nonlinear measures of the largest Lyapunov exponent and correlation dimension as well as the nonconventional stochastic measures of spectral entropy and entropy of amplitudes. No improvement in the detection of REM sleep could be achieved by the inclusion of the new measures. The accuracy of the classification was significantly worse, however, when supplied with these variables alone. In view of results demonstrating the efficiency of nonconventional measures in EEG analysis, the benefit appears to depend on the nature of the problem.
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Affiliation(s)
- M Grözinger
- Department of Psychiatry, University of Mainz, Germany.
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Kaplan A, Röschke J, Darkhovsky B, Fell J. Macrostructural EEG characterization based on nonparametric change point segmentation: application to sleep analysis. J Neurosci Methods 2001; 106:81-90. [PMID: 11248343 DOI: 10.1016/s0165-0270(01)00331-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In the present investigation a new methodology for macrostructural EEG characterization based on automatic segmentation has been applied to sleep analysis. A nonparametric statistical approach for EEG segmentation was chosen, because it minimizes the need for a priori information about a signal. The method provides the detection of change-points i.e. boundaries between quasi-stationary EEG segments based on the EEG characteristics within four fundamental frequency bands (delta, theta, alpha and beta). Polysomnographic data of 18 healthy subjects were analyzed. Our findings show that nonparametric change-point segmentation in combination with cluster analysis enables us to obtain a clear picture of the hierarchical macrostructural organization of sleep, which is impossible to deduce from the unsegmented EEG data. Analysis of correlations between classically defined sleep stages and piecewise stationary power step functions reveals that three basic patterns can be distinguished: SWS (stage III/stage IV), stage II and stage I/REM. In accordance with correlation analyses, cluster detection shows that the cyclic sleep patterns during the course of the night become clearly observable by implementation of only three classes. Since the described methodology is based on a minimum of a priori assumptions, it may be useful for the development of a new sleep classification standard, which goes beyond the established Rechtschaffen and Kales scheme.
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Affiliation(s)
- A Kaplan
- Department of Human Physiology, Moscow State University, 119899, Moscow, Russian Federation
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Wagner P, Röschke J, Mann K, Fell J, Hiller W, Frank C, Grözinger M. Human sleep EEG under the influence of pulsed radio frequency electromagnetic fields. Results from polysomnographies using submaximal high power flux densities. Neuropsychobiology 2001; 42:207-12. [PMID: 11096337 DOI: 10.1159/000026695] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Former exploratory investigations of sleep alterations due to global system for mobile communications (GSM) signals have shown a hypnotic and REM-suppressive effect under field exposure. This effect was observed in a first study using a power flux density of 0.5 W/m(2), and the same trend occurred in a second study with a power flux density of 0.2 W/m(2). For the present study, we applied a submaximal power flux density of 50 W/m(2). To investigate putative effects of radio frequency electromagnetic fields (EMFs) of cellular GSM phones on human sleep EEG pattern, all-night polysomnographies of 20 healthy male subjects both with and without exposure to a circularly polarized EMF (900 MHz, pulsed with a frequency of 217 Hz, pulse duration 577 microseconds) were recorded. The results showed no significant effect of the field application either on conventional sleep parameters or on sleep EEG power spectra.
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Affiliation(s)
- P Wagner
- Department of Psychiatry, University of Mainz, Germany
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