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https://www.readbyqxmd.com/read/27926940/inflammasome-independent-nlrp3-restriction-of-a-protective-early-neutrophil-response-to-pulmonary-tularemia
#1
Sivakumar Periasamy, Hongnga T Le, Ellen B Duffy, Heather Chin, Jonathan A Harton
Francisella tularensis (Ft) causes a frequently fatal, acute necrotic pneumonia in humans and animals. Following lethal Ft infection in mice, infiltration of the lungs by predominantly immature myeloid cells and subsequent myeloid cell death drive pathogenesis and host mortality. However, following sub-lethal Ft challenge, more mature myeloid cells are elicited and are protective. In addition, inflammasome-dependent IL-1β and IL-18 are important for protection. As Nlrp3 appears dispensable for resistance to infection with Francisella novicida, we considered its role during infection with the virulent Type A strain SchuS4 and the attenuated Type B live vaccine strain LVS...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27926939/a-bystander-mechanism-explains-the-specific-phenotype-of-a-broadly-expressed-misfolded-protein
#2
Lauren Klabonski, Ji Zha, Lakshana Senthilkumar, Tali Gidalevitz
Misfolded proteins in transgenic models of conformational diseases interfere with proteostasis machinery and compromise the function of many structurally and functionally unrelated metastable proteins. This collateral damage to cellular proteins has been termed 'bystander' mechanism. How a single misfolded protein overwhelms the proteostasis, and how broadly-expressed mutant proteins cause cell type-selective phenotypes in disease are open questions. We tested the gain-of-function mechanism of a R37C folding mutation in an endogenous IGF-like C...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27926938/uncovering-the-pathogenic-landscape-of-helminth-opisthorchis-viverrini-infections-a-cross-sectional-study-on-contributions-of-physical-and-social-environment-and-healthcare-interventions
#3
Xueyuan Ong, Yi-Chen Wang, Paiboon Sithithaworn, Jutamas Namsanor, David Taylor, Luxana Laithavewat
BACKGROUND: Helminth infections have proven recalcitrant to control by chemotherapy in many parts of Southeast Asia and indeed farther afield. This study isolates and examines the influence of different aspects of the physical and social environment, and uneven intervention effort contributing to the pathogenic landscape of human Opisthorchis viverrini infections. METHODOLOGY: A cross-sectional survey, involving 632 participants, was conducted in four villages in northeast Thailand to examine the impact on prevalence and parasite burden of the reservoir dam environment, socio-economic, demographic, and behavioral factors, and health center intervention efforts...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27926926/a-robust-design-capture-recapture-analysis-of-abundance-survival-and-temporary-emigration-of-three-odontocete-species-in-the-gulf-of-corinth-greece
#4
Nina Luisa Santostasi, Silvia Bonizzoni, Giovanni Bearzi, Lavinia Eddy, Olivier Gimenez
While the Mediterranean Sea has been designated as a Global Biodiversity Hotspot, assessments of cetacean population abundance are lacking for large portions of the region, particularly in the southern and eastern basins. The challenges and costs of obtaining the necessary data often result in absent or poor abundance information. We applied capture-recapture models to estimate abundance, survival and temporary emigration of odontocete populations within a 2,400 km2 semi-enclosed Mediterranean bay, the Gulf of Corinth...
2016: PloS One
https://www.readbyqxmd.com/read/27926922/high-speed-mouse-backcrossing-through-the-female-germ-line
#5
Erin Grove, Sigrid Eckardt, K John McLaughlin
Transferring mouse mutations into specific mouse strain backgrounds can be critical for appropriate analysis of phenotypic effects of targeted genomic alterations and quantitative trait loci. Speed congenic breeding strategies incorporating marker-assisted selection of progeny with the highest percentage target background as breeders for the next generation can produce congenic strains within approximately 5 generations. When mating selected donor males to target strain females, this may require more than 1 year, with each generation lasting 10 to 11 weeks including 3 weeks of gestation and 7 to 8 weeks until the males reach sexual maturity...
2016: PloS One
https://www.readbyqxmd.com/read/27926915/cheetah-reunion-the-challenge-of-finding-your-friends-again
#6
Tatjana Y Hubel, Justine Shotton, Simon D Wilshin, Jane Horgan, Rebecca Klein, Rick McKenna, Alan M Wilson
Animals navigate their environment using a variety of senses and strategies. This multiplicity enables them to respond to different navigational requirements resulting from habitat, scale and purpose. One of the challenges social animals face is how to reunite after periods of separation. We explore a variety of possible mechanisms used to reunite the members of a cheetah coalition dispersed within a large area after prolonged separation. Using GPS data from three cheetahs reuniting after weeks of separation, we determined that 1) the likelihood of purely coincidental reunion is miniscule 2) the reunion occurred in an area not normally frequented 3) with very little time spent in the region in advance of the reunion...
2016: PloS One
https://www.readbyqxmd.com/read/27926870/plasma-membrane-association-but-not-midzone-recruitment-of-rhogef-ect2-is-essential-for-cytokinesis
#7
Kristýna Kotýnková, Kuan-Chung Su, Stephen C West, Mark Petronczki
Cytokinesis, the final step of cell division, begins with the formation of a cleavage furrow. How the mitotic spindle specifies the furrow at the equator in animal cells remains unknown. Current models propose that the concentration of the RhoGEF ECT2 at the spindle midzone and the equatorial plasma membrane directs furrow formation. Using chemical genetic and optogenetic tools, we demonstrate that the association of ECT2 with the plasma membrane during anaphase is required and sufficient for cytokinesis. Local membrane targeting of ECT2 leads to unilateral furrowing, highlighting the importance of local ECT2 activity...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27926862/vav-proteins-are-key-regulators-of-card9-signaling-for-innate-antifungal-immunity
#8
Susanne Roth, Hanna Bergmann, Martin Jaeger, Assa Yeroslaviz, Konstantin Neumann, Paul-Albert Koenig, Clarissa Prazeres da Costa, Lesley Vanes, Vinod Kumar, Melissa Johnson, Mauricio Menacho-Márquez, Bianca Habermann, Victor L Tybulewicz, Mihai Netea, Xosé R Bustelo, Jürgen Ruland
Fungal infections are major causes of morbidity and mortality, especially in immunocompromised individuals. The innate immune system senses fungal pathogens through Syk-coupled C-type lectin receptors (CLRs), which signal through the conserved immune adaptor Card9. Although Card9 is essential for antifungal defense, the mechanisms that couple CLR-proximal events to Card9 control are not well defined. Here, we identify Vav proteins as key activators of the Card9 pathway. Vav1, Vav2, and Vav3 cooperate downstream of Dectin-1, Dectin-2, and Mincle to engage Card9 for NF-κB control and proinflammatory gene transcription...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27926828/harnessing-cancer-cell-metabolism-for-theranostic-applications-using-metabolic-glycoengineering-of-sialic-acid-in-breast-cancer-as-a-pioneering-example
#9
REVIEW
Haitham A Badr, Dina M M AlSadek, Motawa E El-Houseini, Christopher T Saeui, Mohit P Mathew, Kevin J Yarema, Hafiz Ahmed
Abnormal cell surface display of sialic acids - a family of unusual 9-carbon sugars - is widely recognized as distinguishing feature of many types of cancer. Sialoglycans, however, typically cannot be identified with sufficiently high reproducibility and sensitivity to serve as clinically accepted biomarkers and similarly, almost all efforts to exploit cancer-specific differences in sialylation signatures for therapy remain in early stage development. In this report we provide an overview of important facets of glycosylation that contribute to cancer in general with a focus on breast cancer as an example of malignant disease characterized by aberrant sialylation...
November 25, 2016: Biomaterials
https://www.readbyqxmd.com/read/27926826/potential-of-a-bpv1-l1-vlp-vaccine-to-prevent-bpv1-or-bpv2-induced-pseudo-sarcoid-formation-and-safety-and-immunogenicity-of-ecpv2-l1-vlps-in-the-horse
#10
Edmund K Hainisch, Hans Abel-Reichwald, Saeed Shafti-Keramat, Barbara Pratscher, Annunziata Corteggio, Giuseppe Borzacchiello, Maria Wetzig, Christoph Jindra, Alexander Tichy, Reinhard Kirnbauer, Sabine Brandt
We have previously shown that immunization of horses with BPV1 L1 virus-like particles (VLP) is safe and highly immunogenic, and that bovine papillomavirus types 1 and 2 (BPV1, BPV2) are closely related serotypes. Here we evaluated the protective potential of a BPV1 L1 VLP vaccine against experimental BPV1 and BPV2 challenge, and studied the safety and immunogenicity of a bivalent EcPV2/BPV1 L1 VLP vaccine. Fourteen healthy horses were immunized with BPV1 L1 VLPs (100 µg/injection) plus adjuvant on days 0 and 28, whilst seven remained unvaccinated...
December 7, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27926825/mycobacterium-malmesburyense-sp-nov-a-novel-non-tuberculous-mycobacterium-species-revealed-by-multiple-gene-sequence-characterization
#11
Nomakorinte Gcebe, Victor Rutten, Nicolaas Gey van Pittius, Brendon Naicker, Anita Michel
Non-tuberculous mycobacteria (NTM) are ubiquitous in the environment and an increasing number of NTM species have been isolated and characterized from both humans and animals, highlighting the zoonotic potential of these bacteria. Host exposure to NTM may impact on cross-reactive immune responsiveness which may affect diagnosis of bovine tuberculosis and may also play a role in the variability of the efficacy of Mycobacterium bovis BCG vaccination against tuberculosis. In this study we characterized 10 NTM isolates originating from water, soil, nasal swabs of cattle and African buffalo as well as bovine tissue samples...
December 5, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27926813/perturbation-of-h3k27me3-associated-epigenetic-processes-increases-agrobacterium-mediated-transformation
#12
Hidekazu Iwakawa, Benjamin C Carter, Brett C Bishop, Joe Ogas, Stanton B Gelvin
Agrobacterium-mediated transformation is a core technology for basic plant science and agricultural biotechnology. Improving transformation frequency is a major goal for plant transgenesis. We previously showed that T-DNA insertions in some histone genes decreased transformation susceptibility, whereas overexpression of several Arabidopsis H2A and H4 isoforms increased transformation. Overexpression of several histone H2B and H3 isoforms had little effect on transformation frequency. However, overexpression of histone H3-11 (HTR11) enhanced transformation...
December 7, 2016: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/27926753/in-vivo-observation-of-lens-regeneration-in-rat-using-ultra-long-scan-depth-optical-coherence-tomography
#13
Kai-Jing Zhou, Yi-Ni Li, Fu-Rong Huang, Qin-Mei Wang, A-Yong Yu
Purpose: To evaluate morphologic changes of lens regeneration in rats in vivo after extracapsular lens extraction (ECLE) by ultra-long scan depth optical coherence tomography (UL-OCT). Methods: A total of 42 Sprague-Dawley rats were used in this study. We performed ECLE on the right eyes of animals in the surgery group (n = 34). Biomicroscopy and UL-OCT scans were carried out for the surgery group immediately (within 1 hour postoperatively) and at days 1 and 3, weeks 1 and 2, and months 1, 2, and 3 postoperatively...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27926702/animal-models-unlock-your-inner-salamander
#14
Sujata Gupta
No abstract text is available yet for this article.
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27926546/the-effect-of-chronic-kidney-disease-on-t-cell-alloimmunity
#15
Pamela D Winterberg, Mandy L Ford
PURPOSE OF REVIEW: Altered differentiation and activation of T-cell subsets occur in patients with chronic kidney disease (CKD), but the impact on graft rejection and protective immunity during transplantation are not fully understood. RECENT FINDINGS: Patients with CKD have decreased frequency of naïve T cells, accumulation of activated, terminally differentiated memory cells, and skewed regulatory versus T helper 17 ratio. Naïve and memory T-cell subsets do not appear to improve following kidney transplantation...
December 6, 2016: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/27926489/suppression-of-immune-regulatory-cells-with-combined-therapy-of-celecoxib-and-sunitinib-in-renal-cell-carcinoma
#16
Qi Zhao, Jianming Guo, Guomin Wang, Yiwei Chu, Xiaoyi Hu
OBJECTIVE: To observe the the potential benefit of sunitinib in combination with cyclooxygenase-2(COX-2) inhibitor in renal cell carcinoma therapy. METHODS: 769-p cell lines were treated with sunitinib, celecoxib, or in combination at different concentrations respectively. We investigated the expression of granulocyte-macrophage colony stimulating factor (GM-CSF) in 769-p and cell proliferation in vitro. BALB/c mice implanted with Renca cells were divided into 4 groups and administered orally by gavage with sunitinib, COX-2 inhibitor (celecoxib) monotherapy or combination, and PBS respectively...
December 2, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926459/dietary-omega-3-polyunsaturated-fatty-acid-supplementation-in-an-animal-model-of-anxiety
#17
Brian M Ross, Imran Malik, Slim Babay
A large body of evidence suggests that dietary supplementation with omega-3 fatty acids may ameliorate depressed mood. The magnitude of the effect varies between studies, however, ranging from none at all to being of clinical significance. Given that substantial comorbidity occurs between mood and anxiety disorders, suggesting that they have one or more pathophysiological mechanisms in common, we hypothesized that omega-3 fatty acids may be acting primarily to reduce anxiety rather than depression per se, a possibility which could underlie their variable effects on mood...
November 2016: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/27926457/modulation-of-brain-pufa-content-in-different-experimental-models-of-mice
#18
Corinne Joffre, Stéphane Grégoire, Véronique De Smedt, Niyazi Acar, Lionel Bretillon, Agnès Nadjar, Sophie Layé
The relative amounts of arachidonic acid (AA) and docosahexaenoic acid (DHA) govern the different functions of the brain. Their brain levels depend on structures considered, on fatty acid dietary supply and the age of animals. To have a better overview of the different models available in the literature we here compared the brain fatty acid composition in various mice models (C57BL/6J, CD1, Fat-1, SAMP8 mice) fed with different n-3 PUFA diets (deficient, balanced, enriched) in adults and aged animals. Our results demonstrated that brain AA and DHA content is 1) structure-dependent; 2) strain-specific; 3) differently affected by dietary approaches when compared to genetic model of PUFA modulation; 4) different in n-3 PUFA deficient aged C57BL6/J when compared to SAMP8 mouse model of aging...
November 2016: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/27926453/quantifying-motivation-with-effort-based-decision-making-paradigms-in-health-and-disease
#19
T T-J Chong, V Bonnelle, M Husain
Motivation can be characterized as a series of cost-benefit valuations, in which we weigh the amount of effort we are willing to expend (the cost of an action) in return for particular rewards (its benefits). Human motivation has traditionally been measured with self-report and questionnaire-based tools, but an inherent limitation of these methods is that they are unable to provide a mechanistic explanation of the processes underlying motivated behavior. A major goal of current research is to quantify motivation objectively with effort-based decision-making paradigms, by drawing on a rich literature from nonhuman animals...
2016: Progress in Brain Research
https://www.readbyqxmd.com/read/27926439/competition-testosterone-and-adult-neurobehavioral-plasticity
#20
A B Losecaat Vermeer, I Riečanský, C Eisenegger
Motivation in performance is often measured via competitions. Winning a competition has been found to increase the motivation to perform in subsequent competitions. One potential neurobiological mechanism that regulates the motivation to compete involves sex hormones, such as the steroids testosterone and estradiol. A wealth of studies in both nonhuman animals and humans have shown that a rise in testosterone levels before and after winning a competition enhances the motivation to compete. There is strong evidence for acute behavioral effects in response to steroid hormones...
2016: Progress in Brain Research
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