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https://www.readbyqxmd.com/read/28820402/does-signaling-of-estrogen-related-receptors-affect-structure-and-function-of-bank-vole-leydig-cells
#1
P Pawlicki, A Milon, M Zarzycka, J Galas, W Tworzydlo, A Kaminska, L Pardyak, K Lesniak, A Pacwa, B Bilinska, E Gorowska-Wojtowicz, M Kotula-Balak
To get a deeper insight into the function of estrogen-related receptors (ERRs) and dissect underlying mechanism in Leydig cells, ERRs (type α, β and γ) were blocked or activated in testes of adult bank voles (Myodes glareolus) which show seasonal changes in the intratesticular sex hormones level. Both actively reproducing animals (long day conditions; LD) and those with regression of the reproductive system (short day conditions; SD) received intraperitoneal injections of selective ERRα antagonist 3-[4-(2,4-Bis-trifluoromethylbenzyloxy)-3-methoxyphenyl]-2-cyano-N-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)acrylamide (XCT 790) or selective ERRβ/ERRγ agonist N-(4-(Diethylaminobenzylidenyl)-N'-(4-hydroxybenzoyl)-hydrazine (DY131) (50 μ/kg bw; six doses every other day)...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28808032/mechanical-constraint-from-growing-jaw-facilitates-mammalian-dental-diversity
#2
Elodie Renvoisé, Kathryn D Kavanagh, Vincent Lazzari, Teemu J Häkkinen, Ritva Rice, Sophie Pantalacci, Isaac Salazar-Ciudad, Jukka Jernvall
Much of the basic information about individual organ development comes from studies using model species. Whereas conservation of gene regulatory networks across higher taxa supports generalizations made from a limited number of species, generality of mechanistic inferences remains to be tested in tissue culture systems. Here, using mammalian tooth explants cultured in isolation, we investigate self-regulation of patterning by comparing developing molars of the mouse, the model species of mammalian research, and the bank vole...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28803134/age-related-changes-of-physiological-performance-and-survivorship-of-bank-voles-selected-for-high-aerobic-capacity
#3
Agata Marta Rudolf, Maciej Jan Dańko, Edyta Teresa Sadowska, Geoffrey Dheyongera, Paweł Koteja
Variation in lifespans is an intriguing phenomenon, but how metabolic rate influence this variation remains unclear. High aerobic capacity can result in health benefits, but also in increased oxidative damage and accelerated ageing. We tested these contradictory predictions using bank voles (Myodes=Clethrionomys glareolus) from lines selected for high swim-induced aerobic metabolism (A), which had about 50% higher maximum metabolic rate and a higher basal and routine metabolic rates, than those from unselected control lines (C)...
August 10, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28799685/ecological-factors-influencing-small-mammal-infection-by-anaplasma-phagocytophilum-and-borrelia-burgdorferi-s-l-in-agricultural-and-forest-landscapes
#4
Grégoire Perez, Suzanne Bastian, Amélie Chastagner, Albert Agoulon, Olivier Plantard, Gwenaël Vourc'h, Alain Butet
Small mammals are key components of numerous tick-borne disease systems, as hosts for immature ticks and pathogen reservoirs. To study the factors influencing tick-borne infection in small mammals, we trapped small mammals and collected questing ticks in spring and autumn in 2012 and 2013 at 24 sites in a 10x15 km rural landscapes (Brittany, France). Tissue samples were screened by real-time PCR for Anaplasma phagocytophilum and Borrelia burgdorferi sensu lato. Of the two dominant small mammal species captured, bank voles (Myodes glareolus) had higher prevalence than wood mice (Apodemus sylvaticus) for both infections, presumably because of specific differences in immunological defenses...
August 11, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28791488/the-bruce-effect-revisited-is-pregnancy-termination-in-female-rodents-an-adaptation-to-ensure-breeding-success-after-male-turnover-in-low-densities
#5
Jana A Eccard, Melanie Dammhahn, Hannu Ylönen
Pregnancy termination after encountering a strange male, the Bruce effect, is regarded as a counterstrategy of female mammals towards anticipated infanticide. While confirmed in caged rodent pairs, no verification for the Bruce effect existed from experimental field populations of small rodents. We suggest that the effect may be adaptive for breeding rodent females only under specific conditions related to populations with cyclically fluctuating densities. We investigated the occurrence of delay in birth date after experimental turnover of the breeding male under different population composition in bank voles (Myodes glareolus) in large outdoor enclosures: one-male-multiple-females (n = 6 populations/18 females), multiple-males-multiple-females (n = 15/45), and single-male-single-female (MF treatment, n = 74/74)...
August 9, 2017: Oecologia
https://www.readbyqxmd.com/read/28770071/dampening-of-population-cycles-in-voles-affects-small-mammal-community-structure-decreases-diversity-and-increases-prevalence-of-a-zoonotic-disease
#6
Frauke Ecke, David G Angeler, Magnus Magnusson, Hussein Khalil, Birger Hörnfeldt
Long-term decline and depression of density in cyclic small rodents is a recent widespread phenomenon. These observed changes at the population level might have cascading effects at the ecosystem level. Here, we assessed relationships between changing boreal landscapes and biodiversity changes of small mammal communities. We also inferred potential effects of observed community changes for increased transmission risk of Puumala virus (PUUV) spread, causing the zoonotic disease nephropatica epidemica in humans...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28747170/spatial-prediction-and-validation-of-zoonotic-hazard-through-micro-habitat-properties-where-does-puumala-hantavirus-hole-up
#7
Hussein Khalil, Gert Olsson, Magnus Magnusson, Magnus Evander, Birger Hörnfeldt, Frauke Ecke
BACKGROUND: To predict the risk of infectious diseases originating in wildlife, it is important to identify habitats that allow the co-occurrence of pathogens and their hosts. Puumala hantavirus (PUUV) is a directly-transmitted RNA virus that causes hemorrhagic fever in humans, and is carried and transmitted by the bank vole (Myodes glareolus). In northern Sweden, bank voles undergo 3-4 year population cycles, during which their spatial distribution varies greatly. METHODS: We used boosted regression trees; a technique inspired by machine learning, on a 10 - year time-series (fall 2003-2013) to develop a spatial predictive model assessing seasonal PUUV hazard using micro-habitat variables in a landscape heavily modified by forestry...
July 26, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28664467/phylogenetic-analysis-of-puumala-virus-strains-from-central-europe-highlights-the-need-for-a-full-genome-perspective-on-hantavirus-evolution
#8
Róbert Szabó, Lukáš Radosa, Martina Ličková, Monika Sláviková, Marta Heroldová, Michal Stanko, Milan Pejčoch, Anja Osterberg, Lies Laenen, Susanne Schex, Rainer G Ulrich, Sandra Essbauer, Piet Maes, Boris Klempa
Puumala virus (PUUV), carried by bank voles (Myodes glareolus), is the medically most important hantavirus in Central and Western Europe. In this study, a total of 523 bank voles (408 from Germany, 72 from Slovakia, and 43 from Czech Republic) collected between the years 2007-2012 were analyzed for the presence of hantavirus RNA. Partial PUUV genome segment sequences were obtained from 51 voles. Phylogenetic analyses of all three genome segments showed that the newfound strains cluster with other Central and Western European PUUV strains...
June 29, 2017: Virus Genes
https://www.readbyqxmd.com/read/28653589/parasite-dynamics-in-an-invaded-ecosystem-helminth-communities-of-native-wood-mice-are-impacted-by-the-invasive-bank-vole
#9
Karen C Loxton, Colin Lawton, Peter Stafford, Celia V Holland
It is becoming increasingly evident that biological invasions result in altered disease dynamics in invaded ecosystems, with knock-on effects for native host communities. We investigated disease dynamics in an invaded ecosystem, using the helminth communities of the native wood mouse (Apodemus sylvaticus) in the presence and absence of the invasive bank vole (Myodes glareolus) in Ireland. Native wood mice were collected over 2 years from four sites to assess the impact of the presence of the bank vole on wood mouse helminth community dynamics both at the component and infracommunity level...
June 27, 2017: Parasitology
https://www.readbyqxmd.com/read/28615038/prevalence-and-genetic-variability-of-anaplasma-phagocytophilum-in-wild-rodents-from-the-italian-alps
#10
Fausta Rosso, Valentina Tagliapietra, Ivana Baráková, Marketa Derdáková, Adam Konečný, Heidi Christine Hauffe, Annapaola Rizzoli
BACKGROUND: Human granulocytic anaplasmosis is a zoonotic bacterial disease with increasing relevance for public health in Europe. The understanding of its sylvatic cycle and identification of competent reservoir hosts are essential for improving disease risk models and planning preventative measures. RESULTS: In 2012 we collected single ear biopsy punches from 964 live-trapped rodents in the Province of Trento, Italy. Genetic screening for Anaplasma phagocytophilum (AP) was carried out by PCR amplification of a fragment of the 16S rRNA gene...
June 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28593480/difference-in-susceptibility-of-small-rodent-host-species-to-infestation-by-ixodes-ricinus-larvae
#11
László Egyed
In a laboratory experiment (repeated eight times) individuals of six small rodent species were mixed with 500 Ixodes ricinus larvae for 24 h, than over a 3-day-long observation period engorged ticks fallen from individually kept rodents were counted. Forty engorged larvae fell from the hosts, 25% from striped field mice, 32.5% from house mice, 22.5% from common voles, 10% from bank voles, while wood mouse and steppe mouse proved to be almost free of successfully infesting ticks (both 5%). Statistical analysis indicated, that tick burden differed significantly among host species...
June 7, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28585306/circulation-and-diagnostics-of-puumala-virus-in-norway-nephropatia-epidemica-incidence-and-rodent-population-dynamics
#12
Natacha Milhano, Lars Korslund, Magnus Evander, Clas Ahlm, Kirsti Vainio, Susanne G Dudman, Åshild Andreassen
Hantaviruses pose a public health concern worldwide causing haemorrhagic fever with renal syndrome (HFRS) and hantavirus pulmonary syndrome (HPS). Puumala virus (PUUV) is the most prevalent hantavirus in Central and Northern Europe, and causes a mild form of HFRS, also known as nephropathia epidemica (NE). In nature, the main host of PUUV is the bank vole (Myodes glareolus), and transmission to humans occurs through inhalation of aerosols from rodent excreta. Nephropathia epidemica is particularly prevalent in Nordic countries, however, few studies of PUUV have been performed in Norway...
August 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28567209/modelling-human-puumala-hantavirus-infection-in-relation-to-bank-vole-abundance-and-masting-intensity-in-the-netherlands
#13
Arno Swart, Dick L Bekker, Miriam Maas, Ankje de Vries, Roan Pijnacker, Chantal B E M Reusken, Joke W B van der Giessen
This paper deals with modelling the relationship between human Puumala hantavirus (PUUV) infection, the abundance and prevalence of infection of the host (the bank vole), mast, and temperature. These data were used to build and parametrise generalised regression models, and parametrise them using datasets on these factors pertaining to the Netherlands. The performance of the models was assessed by considering their predictive power. Models including mast and monthly temperature performed well, and showed that mast intensity influences vole abundance and hence human exposure for the following year...
2017: Infection Ecology & Epidemiology
https://www.readbyqxmd.com/read/28504447/tick-infestation-of-small-mammals-in-an-english-woodland
#14
Benjamin Cull, Alexander G C Vaux, Lisa J Ottowell, Emma L Gillingham, Jolyon M Medlock
Tick infestations on small mammals were studied from April to November, 2010, in deciduous woodland in southern England in order to determine whether co-infestations with tick stages occurred on small mammals, a key requirement for endemic transmission of tick-borne encephalitis virus (TBEV). A total of 217 small mammals was trapped over 1,760 trap nights. Yellow-necked mice (Apodemus flavicollis) made up the majority (52.5%) of animals, followed by wood mice (A. sylvaticus) 35.5% and bank voles (Myodes glareolus) 12%...
June 2017: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/28396283/experimental-infections-of-wild-bank-voles-myodes-glareolus-from-nephropatia-epidemica-endemic-and-non-endemic-regions-revealed-slight-differences-in-puumala-virological-course-and-immunological-responses
#15
Adélaïde Dubois, Guillaume Castel, Séverine Murri, Coralie Pulido, Jean-Baptiste Pons, Laure Benoit, Anne Loiseau, Latifa Lakhdar, Maxime Galan, Nathalie Charbonnel, Philippe Marianneau
In Europe, the occurrence of nephropathia epidemica (NE), a human disease caused by Puumala virus (PUUV), exhibits considerable geographical heterogeneity despite the continuous distribution of its reservoir, the bank vole Myodes glareolus. To better understand the causes of this heterogeneity, wild voles sampled in two adjacent NE endemic and non-endemic regions of France were infected experimentally with PUUV. The responses of bank voles to PUUV infection, based on the levels of anti-PUUV IgG and viral RNA, were compared...
April 8, 2017: Virus Research
https://www.readbyqxmd.com/read/28392045/low-prevalence-of-zoonotic-babesia-in-small-mammals-and-ixodes-ricinus-in-brittany-france
#16
M Jouglin, G Perez, A Butet, L Malandrin, S Bastian
In order to evaluate the zoonotic risk due to Babesia spp., especially B. microti, we investigated their presence in 597 individuals of five small mammal species and in 2620 questing nymphs of Ixodes ricinus in rural landscapes of Western France (Brittany). Small mammals (rodents and shrews) are indeed suspected to be reservoir hosts for B. microti, and the tick I. ricinus is the vector of the three main zoonotic species in Europe, i.e. B. divergens, B. venatorum and B. microti. Only one bank vole carried B...
March 25, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28359294/temporal-dynamics-of-the-tick-ixodes-ricinus-in-northern-europe-epidemiological-implications
#17
Claire Cayol, Esa Koskela, Tapio Mappes, Anja Siukkola, Eva R Kallio
BACKGROUND: Tick-borne pathogens pose an increasing threat to human and veterinary health across the northern hemisphere. While the seasonal activity of ticks is largely determined by climatic conditions, host-population dynamics are also likely to affect tick abundance. Consequently, abundance fluctuations of rodents in northern Europe are expected to be translated into tick dynamics, and can hence potentially affect the circulation of tick-borne pathogens. We quantified and explained the temporal dynamics of the tick Ixodes ricinus in the northernmost part of its European geographical range, by estimating (i) abundance in vegetation and (ii) infestation load in the most common rodent species in the study area, the bank vole Myodes glareolus...
March 31, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28332927/leptospira-spp-in-small-mammals-from-areas-with-low-and-high-human-hantavirus-incidences-in-south-west-germany
#18
Anna Obiegala, Christoph Albrecht, Maysaa Dafalla, Stephan Drewes, Carolin Oltersdorf, Hendrik Turni, Christian Imholt, Jens Jacob, Christiane Wagner-Wiening, Rainer G Ulrich, Martin Pfeffer
INTRODUCTION: Leptospirosis is caused by Leptospira spp. and is considered the most widespread zoonotic disease worldwide. It mimics nephropathia epidemica in humans, a disease mainly caused by Puumala hantavirus (PUUV). Small mammals are reservoirs for Leptospira spp. and PUUV. Seewis virus (SWSV) is a shrew-borne hantavirus with unknown pathogenicity. The objective of this study was to estimate the prevalence for Leptospira spp. and the frequency of Leptospira-hantavirus co-infections in small mammals collected at locations with high and low incidences in humans...
May 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28331581/strong-bottom-up-influences-on-small-mammal-populations-state-space-model-analyses-from-long-term-studies
#19
John R Flowerdew, Tatsuya Amano, William J Sutherland
"Bottom-up" influences, that is, masting, plus population density and climate, commonly influence woodland rodent demography. However, "top-down" influences (predation) also intervene. Here, we assess the impacts of masting, climate, and density on rodent populations placed in the context of what is known about "top-down" influences. To explain between-year variations in bank vole Myodes glareolus and wood mouse Apodemus sylvaticus population demography, we applied a state-space model to 33 years of catch-mark-release live-trapping, winter temperature, and precise mast-collection data...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28298604/prion-strain-characterization-of-a-novel-subtype-of-creutzfeldt-jakob-disease
#20
Roberta Galeno, Michele Angelo Di Bari, Romolo Nonno, Franco Cardone, Marco Sbriccoli, Silvia Graziano, Loredana Ingrosso, Michele Fiorini, Angelina Valanzano, Giulia Pasini, Anna Poleggi, Ramona Vinci, Anna Ladogana, Maria Puopolo, Salvatore Monaco, Umberto Agrimi, Gianluigi Zanusso, Maurizio Pocchiari
In 2007, we reported a patient with an atypical form of Creutzfeldt-Jakob disease (CJD) heterozygous for methionine-valine (MV) at codon 129 who showed a novel pathological prion protein (PrP(TSE)) conformation with an atypical glycoform (AG) profile and intraneuronal PrP deposition. In the present study, we further characterize the conformational properties of this pathological prion protein (PrP(TSE) MV(AG)), showing that PrP(TSE) MV(AG) is composed of multiple conformers with biochemical properties distinct from those of PrP(TSE) type 1 and type 2 of MV sporadic CJD (sCJD)...
June 1, 2017: Journal of Virology
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