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V S Lebedev, A A Bannikova, K Neumann, M V Ushakova, N V Ivanova, A V Surov
The taxonomy of the genus Cricetulus has been controversial. The phylogenetic relationships both within the genus and among Cricetulus lineages and other genera were examined using a set of five nuclear and two mitochondrial genes. The results demonstrate that Cricetulus in its current treatment is a polyphyletic assemblage because the subgenus Urocricetus is phylogenetically unrelated to all other Cricetulus and is a distant sister group to Phodopus. The grey hamster (C. migratorius) proved to be closer to Cricetus and Allocricetulus than to Cricetulus proper, which includes C...
February 26, 2018: Zootaxa
Gabriele Andrea Lugli, Marta Mangifesta, Sabrina Duranti, Rosaria Anzalone, Christian Milani, Leonardo Mancabelli, Giulia Alessandri, Francesca Turroni, Maria Cristina Ossiprandi, Douwe van Sinderen, Marco Ventura
Six Bifidobacterium strains, i.e., Goo31D, Ham19E, Rab10A, Tam1G, Uis4E and Uis1B, were isolated from domestic goose (Anser domesticus), European hamster (Cricetus cricetus), European rabbit (Oryctolagus cuniculus), emperor tamarin (Saguinus imperator) and pygmy marmoset (Callithrix pygmaea). Cells are Gram-positive, non-motile, non-sporulating, facultative anaerobic and fructose 6-phosphate phosphoketolase-positive. Phylogenetic analyses based on 16S rRNA, ITS-, multilocus- sequences and the core genome revealed that bifidobacterial strains Goo31D, Ham19E, Rab10A, Tam1G, Uis4E and Uis1B exhibit close phylogenetic relatedness with Bifidobacterium choerinum LMG 10510, Bifidobacterium hapali DSM 100202, Bifidobacterium saguini DSM 23967 and Bifidobacterium stellenboschense DSM 23968...
May 2018: Systematic and Applied Microbiology
Mathilde L Tissier, Florian Kletty, Yves Handrich, Caroline Habold
Intensive cereal monoculture is currently the main cause of biodiversity decline in Europe. However, it is difficult to disentangle the effects of intensive monoculture (e.g. pesticide use, mechanical ploughing and reduced protective cover), let alone evaluate how far the reduction of crop diversity affects biodiversity. It remains unclear to which extent the consequent decrease in food resources affects farmland biodiversity, and particularly vertebrate species. We therefore designed this study in mesocosms to investigate the effects of monoculture crops (organic wheat or corn seeds) and mixed crops (a combination of organic wheat, corn, sunflower and alfalfa seeds) on (1) the species richness of weeds and invertebrates and (2) the reproductive success of the European hamster (Cricetus cricetus), a critically endangered umbrella species of European farmlands...
February 2018: Oecologia
Natalia Yu Feoktistova, Ilya G Meschersky, Pavel L Bogomolov, Alexandra S Sayan, Natalia S Poplavskaya, Alexey V Surov
The Common hamster (Cricetus cricetus) is one of the most endangered mammals in Western and Central Europe. Its genetic diversity in Russia and Kazakhstan was investigated for the first time. The analysis of sequences of an mtDNA control region and cytochrome b gene revealed at least three phylogenetic lineages. Most of the species range (approximately 3 million km2), including central Russia, Crimea, the Ural region, and northern Kazakhstan), is inhabited by a single, well-supported phylogroup, E0. Phylogroup E1, previously reported from southeastern Poland and western Ukraine, was first described from Russia (Bryansk Province)...
2017: PloS One
N Yu Feoktistova, I G Meschersky, A V Surov, P L Bogomolov, N N Tovpinetz, N S Poplavskaya
Over the past half-century, the common hamster (Cricetus cricetus), along with range-wide decline of natural populations, has actively populated the cities. The study of the genetic structure of urban populations of common hamster may shed light on features of the habitation of this species in urban landscapes. This article is focused on the genetic structure of common hamster populations in Simferopol (Crimea), one of the largest known urban populations of this species. On the basis of the analysis of nucleotide sequences of the cytochrome b gene and mtDNA control region, and the allelic composition of ten microsatellite loci of nDNA, we revealed that, despite the fact that some individuals can move throughout the city at considerable distances, the entire population of the city is represented by separate demes confined to different areas...
February 2016: Genetika
Mathilde L Tissier, Yves Handrich, Jean-Patrice Robin, Mathieu Weitten, Paul Pevet, Charlotte Kourkgy, Caroline Habold
Over the last decades, climate change and agricultural intensification have been identified as two major phenomena negatively affecting biodiversity. However, little is known about their effects on the life-history traits of hibernating species living in agro-ecosystems. The European hamster (Cricetus cricetus), once a common rodent on agricultural land, is now on the verge of extinction in France. Despite the implemented measures for its protection, populations are still in sharp decline but the reasons for it remain unclear...
May 6, 2016: Scientific Reports
Carina Siutz, Claudia Franceschini, Eva Millesi
In this study, we investigated the timing and duration of hibernation as well as body temperature patterns in free-ranging common hamsters (Cricetus cricetus) with regard to sex and age differences. Body temperature was recorded using subcutaneously implanted data loggers. The results demonstrate that although immergence and vernal emergence sequences of sex and age groups resembled those of most hibernators, particularly adult females delayed hibernation onset until up to early January. Thus, in contrast to other hibernators, female common hamsters hibernated for shorter periods than males and correspondingly spent less time in torpor...
August 2016: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Pedro Paulo Cardoso Pita, José Augusto Rodrigues, Claudia Ota-Tsuzuki, Tatiane Ferreira Miato, Elton G Zenobio, Gabriela Giro, Luciene C Figueiredo, Cristiane Gonçalves, Sergio A Gehrke, Alessandra Cassoni, Jamil Awad Shibli
The establishment of the subgingival microbiota is dependent on successive colonization of the implant surface by bacterial species. Different implant surface topographies could influence the bacterial adsorption and therefore jeopardize the implant survival. This study evaluated the biofilm formation capacity of five oral streptococci species on two titanium surface topographies. In vitro biofilm formation was induced on 30 titanium discs divided in two groups: sandblasted acid-etched (SAE- n = 15) and as-machined (M- n = 15) surface...
2015: BioMed Research International
Sandra Louzada, Ana Vieira-da-Silva, Ana Mendes-da-Silva, Svatava Kubickova, Jiri Rubes, Filomena Adega, Raquel Chaves
Satellite DNAs (satDNA) are tandemly arrayed repeated sequences largely present in eukaryotic genomes, which play important roles in genome evolution and function, and therefore, their analysis is vital. Here, we describe the isolation of a novel satellite DNA family (PMSat) from the rodent Peromyscus eremicus (Cricetidae, Rodentia), which is located in pericentromeric regions and exhibits a typical satellite DNA genome organization. Orthologous PMSat sequences were isolated and characterized from three species belonging to Cricetidae: Cricetus cricetus, Phodopus sungorus and Microtus arvalis...
November 2015: Molecular Phylogenetics and Evolution
Ana Vieira-da-Silva, Sandra Louzada, Filomena Adega, Raquel Chaves
Compared to humans and other mammals, rodent genomes, specifically Muroidea species, underwent intense chromosome reshuffling in which many complex structural rearrangements occurred. This fact makes them preferential animal models for studying the process of karyotype evolution. Here, we present the first combined chromosome comparative maps between 2 Cricetidae species, Cricetus cricetus and Peromyscus eremicus, and the index species Mus musculus and Rattus norvegicus. Comparative chromosome painting was done using mouse and rat paint probes together with in silico analysis from the Ensembl genome browser database...
2015: Cytogenetic and Genome Research
Ana Paço, Filomena Adega, Raquel Chaves
Long interspersed nuclear elements-1 (LINE-1) are the most abundant and active retrotransposons in the mammalian genomes. Traditionally, the occurrence of LINE-1 sequences in the genome of mammals has been explained by the selfish DNA hypothesis. Nevertheless, recently, it has also been argued that these sequences could play important roles in these genomes, as in the regulation of gene expression, genome modelling and X-chromosome inactivation. The non-random chromosomal distribution is a striking feature of these retroelements that somehow reflects its functionality...
February 2015: Journal of Applied Genetics
Stefanie Monecke, Birgit Amann, Karin Lemuth, Franziska Wollnik
In contrast to photoperiodic rodent species, adult circannual European hamsters (Cricetus cricetus) do not rely on melatonin as transducer of the photoperiodic message. Instead, seasonal entrainment involves a special circadian organisation which characterizes a photoperiod-sensitive phase. When days shorten a precise activity pattern ("summer pattern") switches to a weak or arrhythmic "winter pattern". At the very same day gonadal regression is initiated and the circannual clock is reset. In contrast to this difference in photoperiodic time measurement, the broad time span in which offspring are born and the birth-season dependent timing of puberty is similar to photoperiodic rodents...
May 10, 2014: Physiology & Behavior
Stefanie Monecke, Dominique Sage-Ciocca, Franziska Wollnik, Paul Pévet
In mammals, the pineal hormone melatonin is thought to be essential to process environmental photoperiodic information. In this study, we demonstrate in a circannual species, the European hamster Cricetus cricetus, the existence of a melatonin-independent second pathway. In 4 physiological parameters (reproduction, body weight, activity pattern, body temperature), a large majority of pinealectomized European hamsters were entrained to an accelerated photoperiodic regime. It compressed the natural variations in the photoperiod to a 6-month cycle, which allowed us to record up to 6 complete physiological cycles during the life span of the individuals...
August 2013: Journal of Biological Rhythms
Carina Siutz, Eva Millesi
In seasonally breeding animals, timing of reproduction in females can influence offspring development and survival. Temporal and energetic constraints are often more pronounced in juveniles born late in the season, and could activate the stress axis. Common hamsters (Cricetus cricetus) are hibernating rodents, and adult females produce up to three litters during the active season. Birth dates range from May to September, and shortly after natal emergence pups are weaned and start to disperse. In this study, we used faecal cortisol metabolites (FCM) as a non-invasive measure of recent glucocorticoid exposure...
September 1, 2012: General and Comparative Endocrinology
Agata Banaszek, Joanna Ziomek, Katarzyna A Jadwiszczak, Ewa Kaczyńska, Paweł Mirski
In anthropogenically disturbed habitats, natural barriers still exist and have to be recognized, as they are important for conservation measures. Areas of phylogeographic breaks within a species are often stabilized in inhospitable regions which act as natural barriers. An area of contact between phylogeographic lineages of the common hamster (Cricetus cricetus) was found in the Małopolska Upland in Poland. A total of 142 common hamsters were captured between 2005 and 2009. All hamsters were genotyped at 17 microsatellite loci and partial sequences of the mitochondrial (mtDNA) control region were obtained...
July 2012: Acta Theriologica
Ana Paço, Filomena Adega, Henrique Guedes-Pinto, Raquel Chaves
The use of in situ restriction endonuclease (RE) (which cleaves DNA at specific sequences) digestion has proven to be a useful technique in improving the dissection of constitutive heterochromatin (CH), and in the understanding of the CH evolution in different genomes. In the present work we describe in detail the CH of the three Rodentia species, Cricetus cricetus, Peromyscus eremicus (family Cricetidae) and Praomys tullbergi (family Muridae) using a panel of seven REs followed by C-banding. Comparison of the amount, distribution and molecular nature of C-positive heterochromatin revealed molecular heterogeneity in the heterochromatin of the three species...
January 2009: Genetics and Molecular Biology
D J Skene, M Masson-Pévet, P Pévet
Melatonin binding sites in the pars tuberalis of the European hamster (Cricetus cricetus) have been characterized using the radioligand 2-[(125) I]iodomelatonin. Specific 2-[(125) I]iodomelatonin binding was assessed using radioreceptor studies of pars tuberalis membrane preparations. Saturation studies revealed a single, high affinity site (K(d) 39.8 (± 7.6 SEM) pM and B(max) 4.1 (± 0.5 SEM) fmol/mg protein, n=4). Kinetic experiments showed the 2-[(125) I]iodomelatonin binding to be rapid, saturable and reversible...
April 1992: Journal of Neuroendocrinology
No abstract text is available yet for this article.
January 1946: Journal of Pathology and Bacteriology
No abstract text is available yet for this article.
January 1946: Journal
No abstract text is available yet for this article.
February 1946: Anatomical Record
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