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https://www.readbyqxmd.com/read/29245006/big-role-for-a-tiny-genome
#1
Angela E Douglas
In this issue of Cell, Salem et al. demonstrate a remarkable instance of herbivory dependent on a co-evolved mutualism with specialized bacteria. Despite having a tiny genome and limited metabolic repertoire, the bacteria in Cassida beetles produce pectinases predicted to mediate degradation of plant cell walls in the insect diet.
December 14, 2017: Cell
https://www.readbyqxmd.com/read/29242851/in-depth-ptdins-3-4-5-p3-signalosome-analysis-identifies-dapp1-as-a-negative-regulator-of-gpvi-driven-platelet-function
#2
Tom N Durrant, James L Hutchinson, Kate J Heesom, Karen E Anderson, Len R Stephens, Phillip T Hawkins, Aaron J Marshall, Samantha F Moore, Ingeborg Hers
The class I phosphoinositide 3-kinase (PI3K) isoforms play important roles in platelet priming, activation, and stable thrombus formation. Class I PI3Ks predominantly regulate cell function through their catalytic product, the signaling phospholipid phosphatidylinositol 3,4,5-trisphosphate [PtdIns(3,4,5)P3], which coordinates the localization and/or activity of a diverse range of binding proteins. Notably, the complete repertoire of these class I PI3K effectors in platelets remains unknown, limiting mechanistic understanding of class I PI3K-mediated control of platelet function...
June 13, 2017: Blood Advances
https://www.readbyqxmd.com/read/29242513/scarf-1-promotes-adhesion-of-cd4-t-cells-to-human-hepatic-sinusoidal-endothelium-under-conditions-of-shear-stress
#3
Daniel A Patten, Sivesh K Kamarajah, Joanne M Rose, Joseph Tickle, Emma L Shepherd, David H Adams, Chris J Weston, Shishir Shetty
Liver-resident cells are constantly exposed to gut-derived antigens via portal blood and, as a consequence, they express a unique repertoire of scavenger receptors. Whilst there is increasing evidence that the gut contributes to chronic inflammatory liver disease, the role of scavenger receptors in regulating liver inflammation remains limited. Here, we describe for the first time the expression of scavenger receptor class F, member 1 (SCARF-1) on hepatic sinusoidal endothelial cells (HSEC). We report that SCARF-1 shows a highly localised expression pattern and co-localised with endothelial markers on sinusoidal endothelium...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29242186/biased-igh-vdj-gene-repertoire-and-clonal-expansions-in-b-cells-of-chronically-hepatitis-c-virus-infected-individuals
#4
Felicia A Tucci, Simo Kitanovski, Patricia Johansson, Ludger Klein-Hitpass, Alisan Kahraman, Jan Dürig, Daniel Hoffmann, Ralf Küppers
Patients chronically infected with hepatitis C virus (HCV) frequently develop mixed cryoglobulinemia (MC), a monoclonal expansion of IgM+ autoreactive B cells, and also have an increased B cell lymphoma risk. Whether HCV infection also impacts the B cell compartment and the B cell receptor repertoire in patients not affected by MC or lymphomas is poorly understood. Flow cytometric analysis of peripheral blood B cells of 30 MC-negative HCV-infected patients and 15 healthy controls revealed that frequencies of class-switched memory B cells were increased in the patients, whereas frequencies of transitional and naive B cells were decreased...
December 14, 2017: Blood
https://www.readbyqxmd.com/read/29241731/efficacy-of-lentiviral-mediated-gene-therapy-in-an-omenn-syndrome-rag2-mouse-model-is-not-hindered-by-inflammation-and-immune-dysregulation
#5
Valentina Capo, Maria Carmina Castiello, Elena Fontana, Sara Penna, Marita Bosticardo, Elena Draghici, Luigi P Poliani, Lucia Sergi Sergi, Rosita Rigoni, Barbara Cassani, Monica Zanussi, Paola Carrera, Paolo Uva, Kerry Dobbs, Nicolò Sacchetti, Luigi D Notarangelo, Niek P van Til, Gerard Wagemaker, Anna Villa
BACKGROUND: Omenn syndrome (OS) is a rare severe combined immunodeficiency associated with autoimmunity, caused by defects of the lymphoid-specific V(D)J recombination. Most patients carry hypomorphic mutations in recombination activating genes (RAG) 1 or 2. Hematopoietic stem cell (HSC) transplantation is the standard treatment, however gene therapy (GT) may represent a valid alternative, especially for patients lacking a matched donor. OBJECTIVE: To determine the efficacy of lentiviral vector (LV) mediated GT in the murine model of OS (Rag2R229Q/R229Q) in correcting immunodeficiency and autoimmunity...
December 11, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29241356/the-impact-of-experiential-avoidance-and-event-centrality-in-trauma-related-rumination-and-posttraumatic-stress
#6
Lia S Bishop, Victoria E Ameral, Kathleen M Palm Reed
Cognitive control strategies like rumination often increase posttraumatic stress disorder (PTSD) symptoms. However, extant research has provided equivocal results when attempting to explain why this phenomenon occurs. The current study explored several mechanisms that may clarify such findings. For this study, 193 trauma-exposed community members completed measures of PTSD, rumination, experiential avoidance, and event centrality. Elevated reports of rumination were associated with greater PTSD symptomology, experiential avoidance, and event centrality...
December 1, 2017: Behavior Modification
https://www.readbyqxmd.com/read/29239637/discrete-emotion-regulation-strategy-repertoires-and-parasympathetic-physiology-characterize-psychopathology-symptoms-in-childhood
#7
Laura E Quiñones-Camacho, Elizabeth L Davis
Certain psychopathologies are often linked to dysregulation of specific emotions (e.g., anxiety is associated with dysregulation of fear), but few studies have examined how regulatory repertoires for specific emotions (e.g., the strategies a person uses to regulate fear) relate to psychopathology, and fewer still have examined this in childhood. A total of 106 7- to 11-year-olds (M = 9.37 years; SD = 1.30; 44% girls) participated in a multimethod investigation of emotion regulation and psychopathology. Parents reported on family characteristics and children's symptoms...
December 14, 2017: Developmental Psychology
https://www.readbyqxmd.com/read/29238707/drug-repurposing-for-the-treatment-of-acute-myeloid-leukemia
#8
REVIEW
Vibeke Andresen, Bjørn T Gjertsen
Acute myeloid leukemia (AML) is a heterogeneous disease characterized by the accumulation of immature myeloid progenitor cells in the bone marrow, compromising of normal blood cell production and ultimately resulting in bone marrow failure. With a 20% overall survival rate at 5 years and 50% in the 18- to 65-year-old age group, new medicines are needed. It is proposed that development of repurposed drugs may be a part of the new therapy needed. AML is subdivided into recurrent molecular entities based on molecular genetics increasingly accessible for precision medicine...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29237853/the-behavioural-response-of-migrating-humpback-whales-to-a-full-seismic-airgun-array
#9
Rebecca A Dunlop, Michael J Noad, Robert D McCauley, Eric Kniest, Robert Slade, David Paton, Douglas H Cato
Despite concerns on the effects of noise from seismic survey airguns on marine organisms, there remains uncertainty as to the biological significance of any response. This study quantifies and interprets the response of migrating humpback whales (Megaptera novaeangliae) to a 3130 in3 (51.3l) commercial airgun array. We compare the behavioural responses to active trials (array operational; n = 34 whale groups), with responses to control trials (source vessel towing the array while silent; n = 33) and baseline studies of normal behaviour in the absence of the vessel (n = 85)...
December 20, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29237783/biographical-feature-richard-b-tom-thomson-jr-ph-d-d-abmm-f-aam
#10
Erik Munson
"The previous era was characterized by house staff laboratories in every ward, and house staff and attending physicians often spent long periods performing a diagnostic examination of the expectorated sputum specimen, which had been obtained with great care and plated for prompt incubation in incubators on the ward. Therapeutic decisions were generally based on these results. During the past 30 years, there has been a notable decline in the quality of this exercise. Some of this decline can be ascribed to the Clinical Laboratory Improvement Amendments of 1988, which required that staff have credentials to interpret Gram stains of any specimens, thus essentially eliminating the house staff laboratory...
December 13, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29237773/a-subset-of-human-autoreactive-cd1c-restricted-t-cells-preferentially-expresses-trbv4-1-tcrs
#11
Tingxi Guo, Ming Yin Koo, Yuki Kagoya, Mark Anczurowski, Chung-Hsi Wang, Kayoko Saso, Marcus O Butler, Naoto Hirano
In humans, a substantial portion of T cells recognize lipids presented by the monomorphic CD1 proteins. Recent studies have revealed the molecular basis of mycobacterial lipid recognition by CD1c-restricted T cells. Subsets of CD1c-restricted T cells recognize self-lipids in addition to foreign lipids, which may have implications in human diseases involving autoimmunity and malignancy. However, the molecular identity of these self-reactive T cells remains largely elusive. In this study, using a novel CD1c+ artificial APC (aAPC)-based system, we isolated human CD1c-restricted autoreactive T cells and characterized them at the molecular level...
December 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29237549/modeling-parkinson-s-disease-and-treatment-complications-in-rodents-potentials-and-pitfalls-of-the-current-options
#12
REVIEW
Veronica Francardo
Animal models of neurological deficits are essential to assess new therapeutic options and reduce treatment complications. Over the last decades, several rodent models of Parkinson's disease have been developed, and have now become the first-line experimental tool for therapeutic screening purposes. Which model is the most predictive for identifying the efficacy of symptomatic or disease-modifying interventions is still a matter of debate. None of the models so far available is able to recapitulate all the features of the human disease, but several well-characterized models with complementary features currently provide a valuable repertoire of tools to address specific scientific hypotheses...
December 10, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29237208/-acceptance-and-commitment-therapy-in-the-treatment-of-chronic-disease
#13
Katharina Kuba, Gregor Weißflog
Acceptance and Commitment Therapy (ACT) is an intervention representing a transdiagnostic and contextual approach that assumes that psychological suffering is caused by experiential avoidance. The primary intention of ACT is not to eliminate symptoms and to treat mental disorders. Instead, ACT aims to increase psychological flexibility, i. e. to broaden the repertoire of cognitions and behaviors when facing inner and outer aversive events or experiences. Psychological flexibility can be enhanced by working with the 6 core components of the ACT model...
December 2017: Psychotherapie, Psychosomatik, Medizinische Psychologie
https://www.readbyqxmd.com/read/29237060/news-from-the-pub-plant-u-box-type-e3-ubiquitin-ligases
#14
Marco Trujillo
Plant U-box type E3 ubiquitin ligases (PUBs) are well known for their functions in a variety of stress responses, including immune responses and the adaptation to abiotic stresses. First linked to pollen self-incompatibility, their repertoire of roles has grown to encompass also the regulation of developmental processes. Notably, new studies provide clues to their mode of action, underline the existence of conserved PUB-kinase modules, and suggest new links to G-protein signalling, placing PUBs at the crossroads of major signalling hubs...
December 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29235965/philosophical-issues-and-nursing-science
#15
Pamela G Reed
The author of this article introduces a new column that will explore philosophical issues of concern to nurse scientists. In this initial column, I review the general terrain of philosophy in nursing science and explore some philosophical issues relevant to theory development. One conclusion is that inquiry into philosophical issues may help expand our repertoire of conceptual tools useful in building scientific knowledge and facilitating theoretical progress.
January 2018: Nursing Science Quarterly
https://www.readbyqxmd.com/read/29235200/concise-review-the-cellular-conspiracy-of-als
#16
REVIEW
Andrea Serio, Rickie Patani
Amyotrophic lateral sclerosis (ALS) is incurable and devastating. A dearth of therapies has galvanized experimental focus onto the cellular and molecular mechanisms that both initiate and subsequently drive motor neuron (MN) degeneration. A traditional view of ALS pathogenesis posits that disease-specific injury to a subtype of neurons is mechanistically cell-autonomous. This "neuron-centric" view has biased past research efforts. However, a wealth of accumulating evidence now strongly implicates non-neuronal cells as being major determinants of ALS...
December 13, 2017: Stem Cells
https://www.readbyqxmd.com/read/29233745/retropath2-0-a-retrosynthesis-workflow-for-metabolic-engineers
#17
Baudoin Delépine, Thomas Duigou, Pablo Carbonell, Jean-Loup Faulon
Synthetic biology applied to industrial biotechnology is transforming the way we produce chemicals. However, despite advances in the scale and scope of metabolic engineering, the research and development process still remains costly. In order to expand the chemical repertoire for the production of next generation compounds, a major engineering biology effort is required in the development of novel design tools that target chemical diversity through rapid and predictable protocols. Addressing that goal involves retrosynthesis approaches that explore the chemical biosynthetic space...
December 9, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/29233025/ralstonia-eutropha-h16-in-progress-applications-beside-phas-and-establishment-as-production-platform-by-advanced-genetic-tools
#18
Matthias Raberg, Elena Volodina, Kaichien Lin, Alexander Steinbüchel
Ralstonia eutropha strain H16 is a Gram-negative non-pathogenic betaproteobacterium ubiquitously found in soils and has been the subject of intensive research for more than 50 years. Due to its remarkable metabolically versatility, it utilizes a broad range of renewable heterotrophic resources. The substrate utilization range can be further extended by metabolic engineering as genetic tools are available. It has become the best studied "Knallgas" bacterium capable of chemolithoautotrophic growth with hydrogen as the electron donor and carbon dioxide as the carbon source...
December 12, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/29232979/gendered-accounts-of-managing-diabetes-in-same-sex-relationships-a-discursive-analysis-of-partner-support
#19
Adam Jowett
The gendered dimensions of partner support in relationships where one partner has a chronic condition has been a recurring focus within the literature on gender and health. Such literature however typically focuses exclusively on heterosexual couples while same-sex relationships are rendered invisible, leading to the discourse around partner support being heteronormative. This article examines gendered dimensions within accounts of lesbian, gay and bisexual people with diabetes using a discursive psychological approach...
February 1, 2017: Health (London)
https://www.readbyqxmd.com/read/29232962/meaning-in-hoarding-perspectives-of-people-who-hoard-on-clutter-culture-and-agency
#20
David M R Orr, Michael Preston-Shoot, Suzy Braye
Hoarding has become increasingly prominent in clinical practice and popular culture in recent years, giving rise to extensive research and commentary. Critical responses in the social sciences have criticised the cultural assumptions built in to the construct of 'hoarding disorder' and expressed fears that it may generate stigma outweighing its benefits; however, few of these studies have engaged directly with 'hoarders' themselves. This paper reports on in-depth, semi-structured interviews with 10 individuals living in England, who received assessment and intervention for hoarding from Social Services...
December 12, 2017: Anthropology & Medicine
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