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https://www.readbyqxmd.com/read/28524754/arf-gtpase-interplay-with-rho-gtpases-in-regulation-of-the-actin-cytoskeleton
#1
Vikash Singh, Anthony C Davidson, Peter J Hume, Daniel Humphreys, Vassilis Koronakis
The Arf and Rho subfamilies of small GTPases are nucleotide-dependent molecular switches that act as master regulators of vesicular trafficking and the actin cytoskeleton organization. Small GTPases control cell processes with high fidelity by acting through distinct repertoires of binding partners called effectors. While we understand a great deal about how these GTPases act individually, relatively little is known about how they cooperate, especially in the control of effectors. This review highlights how Arf GTPases collaborate with Rac1 to regulate actin cytoskeleton dynamics at the membrane via recruiting and activating the Wave Regulatory Complex (WRC), a Rho effector that underpins lamellipodia formation and macropinocytosis...
May 19, 2017: Small GTPases
https://www.readbyqxmd.com/read/28521766/the-histone-h3-variant-h3-3-regulates-gene-body-dna-methylation-in-arabidopsis-thaliana
#2
Heike Wollmann, Hume Stroud, Ramesh Yelagandula, Yoshiaki Tarutani, Danhua Jiang, Li Jing, Bhagyshree Jamge, Hidenori Takeuchi, Sarah Holec, Xin Nie, Tetsuji Kakutani, Steven E Jacobsen, Frédéric Berger
BACKGROUND: Gene bodies of vertebrates and flowering plants are occupied by the histone variant H3.3 and DNA methylation. The origin and significance of these profiles remain largely unknown. DNA methylation and H3.3 enrichment profiles over gene bodies are correlated and both have a similar dependence on gene transcription levels. This suggests a mechanistic link between H3.3 and gene body methylation. RESULTS: We engineered an H3.3 knockdown in Arabidopsis thaliana and observed transcription reduction that predominantly affects genes responsive to environmental cues...
May 18, 2017: Genome Biology
https://www.readbyqxmd.com/read/28516725/the-need-for-better-preventative-strategies-for-inflammatory-bowel-disease-patients-at-risk-of-herpes-zoster-virus
#3
William Bye, Miles Sparrow, Susie Connor, Jane Andrews, Katie Ellard, Watson Ng, Georgia Hume, Sally Antoniades, Alissa Walsh
BACKGROUND: Immunosuppressed IBD patients have an increased risk of HZV infection. The existing live-attenuated HZV vaccine is contraindicated in some of these patients and can only be used with caution in others. AIMS: To describe characteristics of IBD patients suffering HZV to enable implementation of risk mitigation strategies for those at highest risk. METHODS: Gastroenterologists completed a proforma for IBD patients who experienced HZV infection: IBD phenotype, details of HZV infection, immunosuppression and any change to treatment upon diagnosis of HZV...
May 17, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28515330/post-fire-recovery-of-torpor-and-activity-patterns-of-a-small-mammal
#4
Clare Stawski, Taylor Hume, Gerhard Körtner, Shannon E Currie, Julia Nowack, Fritz Geiser
To cope with the post-fire challenges of decreased availability of food and shelter, brown antechinus (Antechinus stuartii), a small marsupial mammal, increase the use of energy-conserving torpor and reduce activity. However, it is not known how long it takes for animals to resume pre-fire torpor and activity patterns during the recovery of burnt habitat. Therefore, we tested the hypothesis that antechinus will adjust torpor use and activity after a fire depending on vegetation recovery. We simultaneously quantified torpor and activity patterns for female antechinus from three adjacent areas: (i) the area of a management burn 1 year post-fire, (ii) an area that was burned 2 years prior, and (iii) a control area...
May 2017: Biology Letters
https://www.readbyqxmd.com/read/28507222/meeting-the-goal-of-concurrent-adolescent-and-adult-licensure-of-hiv-prevention-and-treatment-strategies
#5
Michelle Hume, Linda L Lewis, Robert M Nelson
The ability of adolescents to access safe and effective new products for HIV prevention and treatment is optimised by adolescent licensure at the same time these products are approved and marketed for adults. Many adolescent product development programmes for HIV prevention or treatment products may proceed simultaneously with adult phase III development programmes. Appropriately implemented, this strategy is not expected to delay licensure as information regarding product efficacy can often be extrapolated from adults to adolescents, and pharmacokinetic properties of drugs in adolescents are expected to be similar to those in adults...
May 15, 2017: Journal of Medical Ethics
https://www.readbyqxmd.com/read/28506113/the-occurrence-of-ryegrass-staggers-and-heat-stress-in-sheep-grazing-ryegrass-endophyte-associations-with-diverse-alkaloid-profiles
#6
L R Fletcher, S C Finch, B L Sutherland, G de Nicolo, W J Mace, C van Koten, D E Hume
AIMS: To compare ryegrass pastures infected with endophytes producing diverse alkaloids for their ability to cause ryegrass staggers in grazing sheep; to compare respiration rates and rectal temperatures of lambs after exposure to heat stress, and to compare liveweight gains during the study period. METHODS: Ryegrass pastures of cultivar Trojan infected with NEA endophytes, branded NEA2 (T-NEA2), endophyte-free Trojan (T-NIL), Samson infected with standard endophyte (S-STD), Samson infected with AR37 endophyte (S-AR37) and endophyte-free Samson (S-NIL), were grazed by lambs (n=30 per cultivar) for up to 48 days in February and March of 2012 and 2013...
May 16, 2017: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/28492258/preparation-and-coherent-manipulation-of-pure-quantum-states-of-a-single-molecular-ion
#7
Chin-Wen Chou, Christoph Kurz, David B Hume, Philipp N Plessow, David R Leibrandt, Dietrich Leibfried
Laser cooling and trapping of atoms and atomic ions has led to advances including the observation of exotic phases of matter, the development of precision sensors and state-of-the-art atomic clocks. The same level of control in molecules could also lead to important developments such as controlled chemical reactions and sensitive probes of fundamental theories, but the vibrational and rotational degrees of freedom in molecules pose a challenge for controlling their quantum mechanical states. Here we use quantum-logic spectroscopy, which maps quantum information between two ion species, to prepare and non-destructively detect quantum mechanical states in molecular ions...
May 10, 2017: Nature
https://www.readbyqxmd.com/read/28490438/deficiency-in-kinesin-1-recruitment-to-melanosomes-precludes-it-from-facilitating-their-centrifugal-transport
#8
Christopher L Robinson, Richard D Evans, Deborah A Briggs, Jose S Ramalho, Alistair N Hume
Microtubules and F-actin, and associated motor proteins, are considered to play complementary roles in long- and short-range organelle transport. However, there is growing appreciation that myosin/F-actin networks can drive long-range transport. In melanocytes myosin-Va and kinesin-1 have both been proposed as long-range centrifugal melanosome transporters. Here we investigated the role of kinesin-1 heavy chain (Kif5b) and its suggested targeting factor Rab1a in transport. Using confocal microscopy and sub-cellular fractionation we did not detect Kif5b or Rab1a on melanosomes...
May 10, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28487472/bioinformatics-in-translational-drug-discovery
#9
Sarah K Wooller, Graeme Benstead-Hume, Xiangrong Chen, Yusuf Ali, Frances Pearl
Bioinformatics approaches are becoming ever more essential in translational drug discovery both in academia and within the pharmaceutical industry. Computational exploitation of the increasing volumes of data generated at all phases of drug discovery is enabling key challenges of the process to be addressed. Here we highlight some of the areas in which bioinformatics resources and methods are being developed to support drug discovery. These include the creation of large data warehouses, bioinformatics algorithms to analyse 'big data' that identify novel drug targets and/or biomarkers, programs to assess the tractability of targets, and the prediction of repositioning opportunities that use licensed drugs to treat additional indications...
May 9, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28487116/patient-education-and-anesthesia-choice-for-total-knee-arthroplasty
#10
Nabil M Elkassabany, Daniel Abraham, Stephanie Hunag, Brandon Kase, Finnah Pio Mhms, Eric Hume, Craig Israelite, Jiabin Liu
OBJECTIVES: Spinal anesthesia (SA) for Total Knee Arthroplasty (TKA) may be associated with better patients' outcomes. This study aims to assess the association between preoperative education about the advantage of SA over general anesthesia (GA) for TKA and the likelihood of patient choice of NA. METHODS: Patients undergoing unilateral primary TKA were identified. Type of anesthesia (GA or SA), attendance of the (joints class), patient demographics, ASA status, anticoagulation status, and diagnosis of back problems were recoded...
April 29, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28479982/logic-passion-and-the-problem-of-convergence
#11
Daniel W McShea
Our estimate of the likelihood of convergence on human-style intelligence depends on how we understand our various mental capacities. Here I revive David Hume's theory of motivation and action to argue that the most common understanding of the two conventionally recognized components of intelligence-reason and emotion-is confused. We say things like, 'Reason can overcome emotion', but to make this statement meaningful, we are forced to treat reason as a compound notion, as a forced and unhappy mixture of concepts that are incommensurate...
June 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28462602/-big-data-approaches-for-novel-anti-cancer-drug-discovery
#12
Graeme Benstead-Hume, Sarah K Wooller, Frances M G Pearl
The development of improved cancer therapies is frequently cited as an urgent unmet medical need. Recent advances in platform technologies and the increasing availability of biological 'big data' are providing an unparalleled opportunity to systematically identify the key genes and pathways involved in tumorigenesis. The discoveries made using these new technologies may lead to novel therapeutic interventions. Areas covered: The authors discuss the current approaches that use 'big data' to identify cancer drivers...
June 2017: Expert Opinion on Drug Discovery
https://www.readbyqxmd.com/read/28460752/-we-ve-learned-to-live-with-it-a-qualitative-study-of-australian-horse-owners-attitudes-perceptions-and-practices-in-response-to-hendra-virus
#13
Anke K Wiethoelter, Kate Sawford, Nicole Schembri, Melanie R Taylor, Navneet K Dhand, Barbara Moloney, Therese Wright, Nina Kung, Hume E Field, Jenny-Ann L M L Toribio
Hendra virus causes sporadic zoonotic disease in Australia following spill over from flying foxes to horses and from horses to people. Prevention and risk mitigation strategies such as vaccination of horses or biosecurity and property management measures are widely publicised, but hinge on initiative and action taken by horse owners as they mediate management, care and treatment of their animals. Hence, underlying beliefs, values and attitudes of horse owners influence their uptake of recommended risk mitigation measures...
May 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28459540/homogeneous-functionalization-of-methane
#14
Niles Jensen Gunsalus, Anjaneyulu Koppaka, Sae Hume Park, Steven M Bischof, Brian G Hashiguchi, Roy A Periana
One of the remaining "grand challenges" in chemistry is the development of a next generation, less expensive, cleaner process that can allow the vast reserves of methane from natural gas to augment or replace oil as the source of fuels and chemicals. Homogeneous (gas/liquid) systems that convert methane to functionalized products with emphasis on reports after 1995 are reviewed. Gas/solid, bioinorganic, biological, and reaction systems that do not specifically involve methane functionalization are excluded...
May 1, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28456481/significance-of-anemia-in-outcomes-after-neoadjuvant-chemoradiotherapy-for-locally-advanced-rectal-cancer
#15
John M McGrane, David J Humes, Austin G Acheson, Fiona Minear, James M D Wheeler, Catherine J Walter
BACKGROUND: Approximately one quarter of patients receiving neoadjuvant chemoradiotherapy (NCRT) for locally advanced rectal cancer will be anemic at presentation. The outcomes of these anemic patients have historically been less favorable. We assessed the potential of anemia to act as an independent biomarker for a poor prognosis in patients with locally advanced rectal cancer. MATERIALS AND METHODS: We performed a retrospective, observational study of consecutive patients with locally advanced rectal adenocarcinoma who underwent NCRT from 2004 to 2009 at 3 English National Health Service trusts...
March 24, 2017: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/28445381/regulatory-advocacy-update-american-society-of-plastic-surgeons-comments-in-response-to-the-u-s-food-and-drug-administration-draft-guidance-documents-on-human-cell-and-tissue-products
#16
J Peter Rubin, Richard A D'Amico, Ricardo Rodriguez, Sydney R Coleman, Paul Cederna, Scot Glasberg, Michael Neumeister, David H Song, Charles Butler, Keith M Hume
The U.S. Food and Drug Administration released draft guidance documents on human cells, tissues, and cellular and tissue-based products regulations. These proposed guidance documents can impact the practice of plastic surgery in the area of tissue grafting procedures. This article describes the relevant issues in these draft guidance documents, and presents the comments provided to the U.S. Food and Drug Administration by the American Society of Plastic Surgeons.
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28444784/earlier-defibrotide-initiation-post-diagnosis-of-veno-occlusive-disease-sinusoidal-obstruction-syndrome-improves-day-100-survival-following-haematopoietic-stem-cell-transplantation
#17
Paul G Richardson, Angela R Smith, Brandon M Triplett, Nancy A Kernan, Stephan A Grupp, Joseph H Antin, Leslie Lehmann, Maja Miloslavsky, Robin Hume, Alison L Hannah, Bijan Nejadnik, Robert J Soiffer
Hepatic veno-occlusive disease/sinusoidal obstruction syndrome (VOD/SOS) is a progressive, potentially fatal complication of conditioning for haematopoietic stem cell transplant (HSCT). The VOD/SOS pathophysiological cascade involves endothelial-cell activation and damage, and a prothrombotic-hypofibrinolytic state. Severe VOD/SOS (typically characterized by multi-organ dysfunction) may be associated with >80% mortality. Defibrotide is approved for treating severe hepatic VOD/SOS post-HSCT in the European Union, and for hepatic VOD/SOS with renal or pulmonary dysfunction post-HSCT in the United States...
April 26, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28435153/human-rhinovirus-induced-inflammatory-responses-are-inhibited-by-phosphatidylserine-containing-liposomes
#18
C A Stokes, R Kaur, M R Edwards, M Mondhe, D Robinson, E C Prestwich, R D Hume, C A Marshall, Y Perrie, V B O'Donnell, J L Harwood, I Sabroe, L C Parker
No abstract text is available yet for this article.
May 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28430937/high-sugar-but-not-high-fat-food-activates-supraoptic-oxytocin-neurones-in-the-male-rat
#19
Catherine Hume, Nancy Sabatier, John Menzies
Oxytocin is a potent anorexigen and is believed to have a role in satiety signalling. We developed rat models to study the activity of oxytocin neurones in response to voluntary consumption or oral gavage of foods using c-Fos immunohistochemistry and in vivo electrophysiology.Using c-Fos expression as an indirect marker of neural activation, we showed that the percentage of magnocellular oxytocin neurones expressing c-Fos increased with voluntary consumption of sweetened condensed milk (SCM). To model the effect of food in the stomach, we gavaged anaesthetised rats with SCM...
April 19, 2017: Endocrinology
https://www.readbyqxmd.com/read/28423505/identification-and-analysis-of-mutational-hotspots-in-oncogenes-and-tumour-suppressors
#20
Hanadi Baeissa, Graeme Benstead-Hume, Christopher J Richardson, Frances M G Pearl
BACKGROUND: The key to interpreting the contribution of a disease-associated mutation in the development and progression of cancer is an understanding of the consequences of that mutation both on the function of the affected protein and on the pathways in which that protein is involved. Protein domains encapsulate function and position-specific domain based analysis of mutations have been shown to help elucidate their phenotypes. RESULTS: In this paper we examine the domain biases in oncogenes and tumour suppressors, and find that their domain compositions substantially differ...
March 28, 2017: Oncotarget
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