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https://www.readbyqxmd.com/read/28340427/identification-and-characterization-of-a-%C3%AE-defensin-gene-involved-in-the-immune-defense-response-of-channel-catfish-ictalurus-punctatus
#1
Jieyao Zhu, Hong Wang, Jun Wang, Xingli Wang, Shuang Peng, Yi Geng, Kaiyu Wang, Pin Ouyang, Zhiqiong Li, Xiaoli Huang, Defang Chen
Antimicrobial peptides are small peptides that play important roles in a host's innate immune response. As an important antimicrobial peptide, β-defensin widely distribute in mammals, insects and plants with broad-spectrum antimicrobial activity. In this study, the β-defensin gene of the channel catfish, Ictalurus punctatus, was cloned, sequenced, and subjected to a bioinformatic analysis. The β-defensin gene of the channel catfish contains three exons and two introns, and encodes a precursor peptide consisting of two domains: a signal peptide of 24 amino acid residues and a mature peptide of 43 amino acid residues...
March 21, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28339425/potential-role-of-the-ovol1-ovol2-axis-and-c-myc-in-the-progression-of-cutaneous-squamous-cell-carcinoma
#2
Takamichi Ito, Gaku Tsuji, Fumitaka Ohno, Takeshi Nakahara, Hiroshi Uchi, Masutaka Furue
OVOL1 and OVOL2 are ubiquitously conserved genes encoding C2H2 zinc-finger transcription factors in mammals. They promote epithelial cell proliferation, differentiation, and mesenchymal-to-epithelial transition, coordinately mediated via the Wnt signaling pathway. We previously reported that human OVOL1 and OVOL2 were preferentially expressed in the normal epidermis and hair follicles as well as their tumors, and found that OVOL1 is upregulated in Bowen's disease and downregulated in cutaneous squamous cell carcinoma...
March 24, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28332937/yersinia-spp-in-wild-rodents-and-shrews-in-finland
#3
Suvi Joutsen, Riikka Laukkanen-Ninios, Heikki Henttonen, Jukka Niemimaa, Liina Voutilainen, Eva R Kallio, Heikki Helle, Hannu Korkeala, Maria Fredriksson-Ahomaa
Yersinia enterocolitica and Yersinia pseudotuberculosis are important zoonotic bacteria causing human enteric yersiniosis commonly reported in Europe. All Y. pseudotuberculosis strains are considered pathogenic, while Y. enterocolitica include both pathogenic and nonpathogenic strains which can be divided into six biotypes (1A, 1B, and 2-5) and about 30 serotypes. The most common types causing yersiniosis in Europe are Y. enterocolitica bioserotypes 4/O:3 and 2/O:9. Strains belonging to biotype 1A are considered as nonpathogenic because they are missing important virulence genes like the attachment-invasion-locus (ail) gene in the chromosome and the virulence plasmid...
March 23, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28332927/leptospira-spp-in-small-mammals-from-areas-with-low-and-high-human-hantavirus-incidences-in-south-west-germany
#4
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...
March 23, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28332310/arboreal-locomotion-in-eurasian-harvest-mice-micromys-minutus-rodentia-muridae-the-gaits-of-small-mammals
#5
Nikolaos-Evangelos Karantanis, Leszek Rychlik, Anthony Herrel, Dionisios Youlatos
Body size imposes significant constraints on arboreal locomotion. Despite the wealth of research in larger arboreal mammals, there is a lack of data on arboreal gaits of small mammals. In this context, the present study explores arboreal locomotion in one of the smallest rodents, the Eurasian harvest mice Micromys minutus (∼10 g). We examined gait metrics (i.e., diagonality, duty factor [DF], DF index, velocity, stride length, and stride frequency) of six adult male mice on simulated arboreal substrates of different sizes (2, 5, 10, and 25 mm) and inclinations (0(0) and 45(0) )...
March 23, 2017: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/28331590/when-perception-reflects-reality-non-native-grass-invasion-alters-small-mammal-risk-landscapes-and-survival
#6
Joseph P Ceradini, Anna D Chalfoun
Modification of habitat structure due to invasive plants can alter the risk landscape for wildlife by, for example, changing the quality or availability of refuge habitat. Whether perceived risk corresponds with actual fitness outcomes, however, remains an important open question. We simultaneously measured how habitat changes due to a common invasive grass (cheatgrass, Bromus tectorum) affected the perceived risk, habitat selection, and apparent survival of a small mammal, enabling us to assess how well perceived risk influenced important behaviors and reflected actual risk...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28331581/strong-bottom-up-influences-on-small-mammal-populations-state-space-model-analyses-from-long-term-studies
#7
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/28329402/novel-orthopoxvirus-infection-in-an-alaska-resident
#8
Yuri P Springer, Christopher H Hsu, Zachary R Werle, Link E Olson, Michael P Cooper, Louisa J Castrodale, Nisha Fowler, Andrea M McCollum, Cynthia S Goldsmith, Ginny L Emerson, Kimberly Wilkins, Jeffrey B Doty, Jillybeth Burgado, JinXin Gao, Nishi Patel, Matthew R Mauldin, Mary G Reynolds, Panayampalli S Satheshkumar, Whitni Davidson, Yu Li, Joseph B McLaughlin
Background.: Human infection by orthopoxviruses is being reported with increasing frequency, attributed in part to the cessation of smallpox vaccination and concomitant waning of population-level immunity. In July 2015, a female resident of interior Alaska, presented to an urgent care clinic with a dermal lesion consistent with poxvirus infection. Laboratory testing of a virus isolated from the lesion confirmed infection by an Orthopoxvirus. Methods.: The virus isolate was characterized by using electron microscopy and nucleic acid sequencing...
March 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28325765/caenorhabditis-elegans-rig-i-homolog-mediates-antiviral-rna-interference-downstream-of-dicer-dependent-biogenesis-of-viral-small-interfering-rnas
#9
Stephanie R Coffman, Jinfeng Lu, Xunyang Guo, Jing Zhong, Hongshan Jiang, Gina Broitman-Maduro, Wan-Xiang Li, Rui Lu, Morris Maduro, Shou-Wei Ding
Dicer enzymes process virus-specific double-stranded RNA (dsRNA) into small interfering RNAs (siRNAs) to initiate specific antiviral defense by related RNA interference (RNAi) pathways in plants, insects, nematodes, and mammals. Antiviral RNAi in Caenorhabditis elegans requires Dicer-related helicase 1 (DRH-1), not found in plants and insects but highly homologous to mammalian retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs), intracellular viral RNA sensors that trigger innate immunity against RNA virus infection...
March 21, 2017: MBio
https://www.readbyqxmd.com/read/28325284/type-i-interferons-impede-short-hairpin-rna-mediated-rnai-via-inhibition-of-dicer-mediated-processing-to-small-interfering-rna
#10
Mitsuhiro Machitani, Fuminori Sakurai, Keisaku Wakabayashi, Kosuke Takayama, Masashi Tachibana, Hiroyuki Mizuguchi
RNAi by short hairpin RNA (shRNA) is a powerful tool not only for studying gene functions in various organisms, including mammals, but also for the treatment of severe disorders. However, shRNA-expressing vectors can induce type I interferon (IFN) expression by activation of innate immune responses, leading to off-target effects and unexpected side effects. Several strategies have been developed to prevent type I IFN induction. On the other hand, it has remained unclear whether type I IFNs have effects on shRNA-mediated RNAi...
March 17, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28324159/hibernation-based-blood-loss-therapy-increases-survivability-of-lethal-hemorrhagic-shock-in-rats
#11
Cecilia E Perez de Lara Rodriguez, Lester R Drewes, Matthew T Andrews
A small-volume (1 ml/kg) resuscitation fluid based on metabolic adaptations in hibernating mammals was optimized using a rat model of hemorrhagic shock. A previous study of this therapy tested only one concentration of three specific components: 4 M D-stereoisomer of beta-hydroxybutyrate (BHB), 43 mM melatonin, and 20% DMSO. In this study, we considered the range of concentrations of BHB and melatonin seen during the physiological extremes of rapid arousal from hypothermic torpor in natural hibernators and applied these to the non-hibernating Sprague-Dawley rat model...
March 21, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28323972/neurosecretory-protein-gl-a-hypothalamic-small-secretory-protein-participates-in-energy-homeostasis-in-male-mice
#12
Daichi Matsuura, Kenshiro Shikano, Takaya Saito, Eiko Iwakoshi-Ukena, Megumi Furumitsu, Yuta Ochi, Manami Sato, George E Bentley, Lance J Kriegsfeld, Kazuyoshi Ukena
We have recently identified a novel cDNA encoding a small secretory protein termed neurosecretory protein GL (NPGL) from the avian hypothalamus. In chicks, NPGL increases body weight gain without affecting food intake. A database search reveals that NPGL is conserved throughout vertebrates. However, the central distribution and functional role of NPGL remains to be elucidated in mammals. In this study, we identified the precursor cDNA encoding NPGL from the mouse hypothalamus. Quantitative RT-PCR and morphological analyses revealed that NPGL precursor mRNA is robustly expressed in the mediobasal hypothalamus with NPGL neurons specifically localized to the lateroposterior part of the arcuate nucleus in the hypothalamus...
March 17, 2017: Endocrinology
https://www.readbyqxmd.com/read/28322735/stella-collaborates-in-distinct-mesendodermal-cell-subpopulations-at-the-fetal-placental-interface-in-the-mouse-gastrula
#13
Adam D Wolfe, Adriana M Rodriguez, Karen M Downs
The allantois-derived umbilical component of the chorio-allantoic placenta shuttles fetal blood to and from the chorion, thereby ensuring fetal-maternal exchange. The progenitor populations that establish and supply the fetal-umbilical interface lie, in part, within the base of the allantois, where the germ line is claimed to segregate from the soma. Results of recent studies in the mouse have reported that STELLA (DPPA-3, PGC7) co-localizes with PRDM1 (BLIMP1), the bimolecular signature of putative primordial germ cells (PGCs) throughout the fetal-placental interface...
March 16, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28317278/species-traits-help-predict-small-mammal-responses-to-habitat-homogenization-by-an-invasive-grass
#14
Joseph P Ceradini, Anna D Chalfoun
Invasive plants can negatively affect native species, however, the strength, direction, and shape of responses may vary depending on the type of habitat alteration and the natural history of native species. To prioritize conservation of vulnerable species, it is therefore critical to effectively predict species' responses to invasive plants, which may be facilitated by a framework based on species' traits. We studied the population and community responses of small mammals and changes in habitat heterogeneity across a gradient of cheatgrass (Bromus tectorum) cover, a widespread invasive plant in North America...
March 20, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28316891/urban-forests-sustain-diverse-carrion-beetle-assemblages-in-the-new-york-city-metropolitan-area
#15
Nicole A Fusco, Anthony Zhao, Jason Munshi-South
Urbanization is an increasingly pervasive form of land transformation that reduces biodiversity of many taxonomic groups. Beetles exhibit a broad range of responses to urbanization, likely due to the high functional diversity in this order. Carrion beetles (Order: Coleoptera, Family: Silphidae) provide an important ecosystem service by promoting decomposition of small-bodied carcasses, and have previously been found to decline due to forest fragmentation caused by urbanization. However, New York City (NYC) and many other cities have fairly large continuous forest patches that support dense populations of small mammals, and thus may harbor relatively robust carrion beetle communities in city parks...
2017: PeerJ
https://www.readbyqxmd.com/read/28316235/evaluation-of-nanobody-conjugates-and-protein-fusions-as-bioanalytical-reagents
#16
Virginia J Bruce, Brian R McNaughton
Enzyme-linked immunosorbent assay (ELISA), flow cytometry, and Western blot are common bioanalytical techniques. Successful execution traditionally requires the use of one or more commercially available antibody-small-molecule dye, or antibody-reporter protein conjugates that recognize relatively short peptide tags (<15 amino acids). However, the size of antibodies, and their molecular complexity (by virtue of post-translational disulfide formation and glycosylation) typically requires either expression in mammalian cells or purification from immunized mammals...
March 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28304372/micrornas-mir-203-3p-mir-664-3p-and-mir-708-5p-are-associated-with-median-strain-lifespan-in-mice
#17
Benjamin P Lee, Ivana Burić, Anupriya George-Pandeth, Kevin Flurkey, David E Harrison, Rong Yuan, Luanne L Peters, George A Kuchel, David Melzer, Lorna W Harries
MicroRNAs (miRNAs) are small non-coding RNA species that have been shown to have roles in multiple processes that occur in higher eukaryotes. They act by binding to specific sequences in the 3' untranslated region of their target genes and causing the transcripts to be degraded by the RNA-induced silencing complex (RISC). MicroRNAs have previously been reported to demonstrate altered expression in several aging phenotypes such as cellular senescence and age itself. Here, we have measured the expression levels of 521 small regulatory microRNAs (miRNAs) in spleen tissue from young and old animals of 6 mouse strains with different median strain lifespans by quantitative real-time PCR...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302767/effect-of-different-%C3%AE-subunit-isoforms-on-the-regulation-of-ampk
#18
Robin Willows, Naveenan Navaratnam, Ana Lima, Jon Read, David Carling
AMP-activated protein kinase (AMPK) plays a key role in integrating metabolic pathways in response to energy demand. AMPK activation results in a wide range of downstream responses, many of which are associated with improved metabolic outcome, making AMPK an attractive target for the treatment of metabolic diseases. AMPK is a heterotrimeric complex consisting of a catalytic subunit (α) and two regulatory subunits (β and γ). The γ subunit harbours the nucleotide binding sites and plays an important role in AMPK regulation in response to cellular energy levels...
March 16, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28301495/evaluation-of-micro-gps-receivers-for-tracking-small-bodied-mammals
#19
Laura A McMahon, Janet L Rachlow, Lisa A Shipley, Jennifer S Forbey, Timothy R Johnson, Peter J Olsoy
GPS telemetry markedly enhances the temporal and spatial resolution of animal location data, and recent advances in micro-GPS receivers permit their deployment on small mammals. One such technological advance, snapshot technology, allows for improved battery life by reducing the time to first fix via postponing recovery of satellite ephemeris (satellite location) data and processing of locations. However, no previous work has employed snapshot technology for small, terrestrial mammals. We evaluated performance of two types of micro-GPS (< 20 g) receivers (traditional and snapshot) on a small, semi-fossorial lagomorph, the pygmy rabbit (Brachylagus idahoensis), to understand how GPS errors might influence fine-scale assessments of space use and habitat selection...
2017: PloS One
https://www.readbyqxmd.com/read/28301327/high-resolution-respiratory-inductive-plethysmography-in-rats-validation-in-anesthetized-conditions
#20
Timothe Flenet, Julie Fontecave-Jallon, Pierre-Yves Gumery, Charles Eynard, Francois Boucher, Pierre Baconnier, Stephane Tanguy
Respiratory monitoring is often required in experimental physiological and pharmacological studies in rodents. Currently, the mostly used techniques are direct measurement of airflow on intubated animals and whole body plethysmography. Although the reliability of these methods has been broadly demonstrated, they also have several drawbacks such as invasiveness, high cost of use or confinement of the animals. Respiratory Inductive Plethysmography (RIP) is a non-invasive technique already used in medium-sized mammals that has not yet been evaluated in small rodents...
March 16, 2017: Physiological Measurement
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