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https://www.readbyqxmd.com/read/29023717/recovery-from-the-anatomical-effects-of-long-term-monocular-deprivation-in-cat-lateral-geniculate-nucleus
#1
Kevin R Duffy, Ming-Fai Fong, Donald E Mitchell, Mark F Bear
Monocular deprivation (MD) imposed early in postnatal life elicits profound structural and functional abnormalities throughout the primary visual pathway. The ability of MD to modify neurons within the visual system is restricted to a so-called critical period that, for cats, peaks at about one postnatal month and declines thereafter so that by about 3 months of age MD has little effect. Recovery from the consequences of MD likewise adheres to a critical period that ends by about 3 months of age, after which the effects of deprivation are thought to be permanent and without capacity for reversal...
October 11, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/29020221/systemic-inflammatory-response-to-malaria-during-pregnancy-is-associated-with-pregnancy-loss-and-preterm-delivery
#2
Michal Fried, Jonathan D Kurtis, Bruce Swihart, Sunthorn Pond-Tor, Amadou Barry, Youssoufa Sidibe, Santara Gaoussou, Moussa Traore, Sekouba Keita, Almahamoudou Mahamar, Oumar Attaher, Adama B Dembele, Kadidia B Cisse, Bacary S Diarra, Moussa B Kanoute, Alassane Dicko, Patrick E Duffy
Background: Pregnancy malaria (PM) is associated with a proinflammatory immune response characterized by increased levels of cytokines and chemokines such as tumor necrosis factor-α, interferon-γ, interleukin 10 (IL-10), and CXCL9. These changes are associated with poor outcomes including low birthweight delivery and maternal anemia. However, it is unknown if inflammatory pathways during malaria are related to pregnancy loss and preterm delivery (PTD). Methods: Cytokine and chemokine levels were measured in maternal peripheral blood at enrollment, gestational week 30-32, and delivery, and in placental blood, of 638 women during a longitudinal cohort study in Ouelessebougou, Mali...
July 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28959245/phylogenomic-pan-genomic-pathogenomic-and-evolutionary-genomic-insights-into-the-agronomically-relevant-enterobacteria-pantoea-ananatis-and-pantoea-stewartii
#3
Pieter De Maayer, Habibu Aliyu, Surendra Vikram, Jochen Blom, Brion Duffy, Don A Cowan, Theo H M Smits, Stephanus N Venter, Teresa A Coutinho
Pantoea ananatis is ubiquitously found in the environment and causes disease on a wide range of plant hosts. By contrast, its sister species, Pantoea stewartii subsp. stewartii is the host-specific causative agent of the devastating maize disease Stewart's wilt. This pathogen has a restricted lifecycle, overwintering in an insect vector before being introduced into susceptible maize cultivars, causing disease and returning to overwinter in its vector. The other subspecies of P. stewartii subsp. indologenes, has been isolated from different plant hosts and is predicted to proliferate in different environmental niches...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28950155/production-of-high-fidelity-electropherograms-results-in-improved-and-consistent-dna-interpretation-standardizing-the-forensic-validation-process
#4
Kelsey C Peters, Harish Swaminathan, Jennifer Sheehan, Ken R Duffy, Desmond S Lun, Catherine M Grgicak
Samples containing low-copy numbers of DNA are routinely encountered in casework. The signal acquired from these sample types can be difficult to interpret as they do not always contain all of the genotypic information from each contributor, where the loss of genetic information is associated with sampling and detection effects. The present work focuses on developing a validation scheme to aid in mitigating the effects of the latter. We establish a scheme designed to simultaneously improve signal resolution and detection rates without costly large-scale experimental validation studies by applying a combined simulation and experimental based approach...
September 8, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28943400/standardized-whole-blood-stimulation-improves-immunomonitoring-of-induced-immune-responses-in-multi-center-study
#5
Darragh Duffy, Vincent Rouilly, Cecile Braudeau, Véronique Corbière, Raouf Djebali, Marie-Noelle Ungeheuer, Regis Josien, Samuel T LaBrie, Olivier Lantz, Delphine Louis, Eva Martinez-Caceres, Francoise Mascart, Jose G Ruiz de Morales, Catherine Ottone, Lydia Redjah, Nina Salabert-Le Guen, Alain Savenay, Manfred Schmolz, Antoine Toubert, Matthew L Albert
Functional immune responses are increasingly important for clinical studies, providing in depth biomarker information to assess immunotherapy or vaccination. Incorporating functional immune assays into routine clinical practice has remained limited due to challenges in standardizing sample preparation. We recently described the use of a whole blood syringe-based system, TruCulture®, which permits point-of-care standardized immune stimulation. Here, we report on a multi-center clinical study in seven FOCIS Centers of Excellence to directly compare TruCulture to conventional PBMC methods...
September 22, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28902417/genetic-variants-related-to-disease-susceptibility-and-immunotolerance-in-the-duffy-antigen-receptor-for-chemokines-darc-fy-gene-in-the-black-lion-tamarin-leontopithecus-chrysopygus-primates
#6
Ashley Ansel, James D Lewis, Don J Melnick, Cristiana Martins, Claudio Valladares-Padua, Beatriz Perez-Sweeney
The DARC (Duffy antigen receptor for chemokines) gene encodes the DARC protein, which serves multiple roles in the immune system, as a binding site for the malarial parasites Plasmodium vivax and Plasmodium knowlesi, a promiscuous chemokine receptor and a blood group antigen. Variation in DARC may play particularly significant roles in innate immunity, immunotolerance and pathogen entry in callitrichines, such as the black lion tamarin (Leontopithecus chrysopygus). We compared amino acid sequences of DARC in the black lion tamarin (BLT) to non-human Haplorhine primates and Homo sapiens...
October 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28898688/improving-non-technical-skills-teamwork-in-post-partum-haemorrhage-a-grouped-randomised-trial
#7
Pippa M Letchworth, Shane P Duffy, Dan Phillips
OBJECTIVE: To determine the effect of a decision support technology on teamwork and associated non-technical (NTS) and technical skills when teams manage post-partum haemorrhage (PPH) in the simulated environment. METHODS: Multidisciplinary (MDT) maternity teams were taught how to manage post partum haemorrhage. They were randomised to the intervention: using a decision support mobile digital platform or a control group. Each team managed a post-partum simulation, which was recorded and reviewed by assessors...
August 26, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28882552/prognostic-and-predictive-biomarkers-in-breast-cancer-past-present-and-future
#8
REVIEW
Andrea Nicolini, Paola Ferrari, Michael J Duffy
Following a diagnosis of breast cancer, the most immediate challenges in patient management are the determination of prognosis and identification of the most appropriate adjuvant systemic therapy. Determining prognosis can best be addressed with a combination of traditional clinicopathological prognostic factors, biomarkers such as HER2/neu and specific multigene genes tests. Amongst the best validated prognostic multigene tests are uPA/PAI1, Oncotype DX and MammaPrint. Oncotype DX and MammaPrint, may be used for predicting outcome and aiding adjunct therapy decision making in patients with ER-positive, HER2-negative breast cancers that are either lymph node-negative or node positive (1-3 metastatic nodes), while uPA/PAI-1 may be similarly used in ER-positive, lymph node-negative patients...
September 4, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28875858/managing-neuropathic-pain-in-multiple-sclerosis-pharmacological-interventions
#9
Samuel S Duffy, Justin G Lees, Chamini J Perera, Gila Moalem-Taylor
BACKGROUND: Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS). Of the plethora of motor and sensory disturbances experienced by sufferers, neuropathic pain is a highly prevalent and debilitating symptom, and at present remains extremely difficult to treat. Common forms of neuropathic pain seen in MS patients include central neuropathic pain, Lhermitte's phenomenon and trigeminal neuralgia, which are all speculated to arise from specific patterns of lesion formation...
September 6, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28865291/advances-in-polymeric-islet-cell-encapsulation-technologies-to-limit-the-foreign-body-response-and-provide-immunoisolation
#10
REVIEW
Alan J Ryan, Hugh S O'Neill, Garry P Duffy, Fergal J O'Brien
Islet transplantation for the treatment of type 1 diabetes (T1D) is hampered by the shortage of donor tissue and the need for life-long immunosuppression. The engineering of materials to limit host immune rejection opens the possibilities of utilising allogeneic and even xenogeneic cells without the need for systemic immunosuppression. Here we discuss the most recent developments in immunoisolation of transplanted cells using advanced polymeric biomaterials, utilising macroscale to nanoscale approaches, to limit aberrant immune responses...
August 30, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28854515/intravenous-immunoglobulin-in%C3%A2-the%C3%A2-management-of-a-rare-cause-of%C3%A2-hemolytic-disease-of-the-newborn-anti-sara-antibodies
#11
R Venkataraman, K Yusuf
Hemolytic disease of newborn (HDN) is a condition that develops in a fetus, when the IgG molecules produced by the mother pass through the placenta and attack the fetal red blood cells. HDN can occur due to Rh and ABO incompatibilities between the mother and the fetus as well as due to other allo-immune antibodies belonging to Kell (K and k), Duffy (Fya), Kidd (Jka and Jkb), and MNS (M, N, S, and s) systems. Role of intravenous immunoglobulin in management of HDN is not clear.SARA red blood cell antigen, first discovered in 1990 is a low frequency antigen...
August 23, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28830457/growth-and-weight-gain-in-children-with-juvenile-idiopathic-arthritis-results-from-the-reacch-out-cohort
#12
Jaime Guzman, Tristan Kerr, Leanne M Ward, Jinhui Ma, Kiem Oen, Alan M Rosenberg, Brian M Feldman, Gilles Boire, Kristin Houghton, Paul Dancey, Rosie Scuccimarri, Alessandra Bruns, Adam M Huber, Karen Watanabe Duffy, Natalie J Shiff, Roberta A Berard, Deborah M Levy, Elizabeth Stringer, Kimberly Morishita, Nicole Johnson, David A Cabral, Maggie Larché, Ross E Petty, Ronald M Laxer, Earl Silverman, Paivi Miettunen, Anne-Laure Chetaille, Elie Haddad, Lynn Spiegel, Stuart E Turvey, Heinrike Schmeling, Bianca Lang, Janet Ellsworth, Suzanne E Ramsey, Johannes Roth, Sarah Campillo, Susanne Benseler, Gaëlle Chédeville, Rayfel Schneider, Shirley M L Tse, Roxana Bolaria, Katherine Gross, Debbie Feldman, Bonnie Cameron, Roman Jurencak, Jean Dorval, Claire LeBlanc, Claire St Cyr, Michele Gibbon, Rae S M Yeung, Ciarán M Duffy, Lori B Tucker
BACKGROUND: With modern treatments, the effect of juvenile idiopathic arthritis (JIA) on growth may be less than previously reported. Our objective was to describe height, weight and body mass index (BMI) development in a contemporary JIA inception cohort. METHODS: Canadian children newly-diagnosed with JIA 2005-2010 had weight and height measurements every 6 months for 2 years, then yearly up to 5 years. These measurements were used to calculate mean age- and sex-standardized Z-scores, and estimate prevalence and cumulative incidence of growth impairments, and the impact of disease activity and corticosteroids on growth...
August 22, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28818038/role-of-the-type-vi-secretion-systems-during-disease-interactions-of-erwinia-amylovora-with-its-plant-host
#13
Tim Kamber, Joël F Pothier, Cosima Pelludat, Fabio Rezzonico, Brion Duffy, Theo H M Smits
BACKGROUND: Type VI secretion systems (T6SS) are widespread among Gram-negative bacteria and have a potential role as essential virulence factors or to maintain symbiotic interactions. Three T6SS gene clusters were identified in the genome of E. amylovora CFBP 1430, of which T6SS-1 and T6SS-3 represent complete T6SS machineries, while T6SS-2 is reduced in its gene content. RESULTS: To assess the contribution of T6SSs to virulence and potential transcriptomic changes of E...
August 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28813042/the-carotenoid-pathway-what-is-important-for-excitation-quenching-in-plant-antenna-complexes
#14
Kieran F Fox, Vytautas Balevičius, Jevgenij Chmeliov, Leonas Valkunas, Alexander V Ruban, Christopher D P Duffy
Plant light-harvesting is regulated by the Non-Photochemical Quenching (NPQ) mechanism involving the reversible formation of excitation quenching sites in the Photosystem II (PSII) antenna in response to high light. While the major antenna complex, LHCII, is known to be a site of NPQ, the precise mechanism of excitation quenching is not clearly understood. A preliminary model of the quenched crystal structure of LHCII implied that quenching arises from slow energy capture by Car pigments. It predicted a thoroughly quenched system but offered little insight into the defining aspects of this quenching...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28797351/implant-and-midterm-outcomes-of-the-subcutaneous-implantable-cardioverter-defibrillator-registry-the-effortless-study
#15
MULTICENTER STUDY
Lucas Boersma, Craig Barr, Reinoud Knops, Dominic Theuns, Lars Eckardt, Petr Neuzil, Marcoen Scholten, Margaret Hood, Juergen Kuschyk, Paul Jones, Elizabeth Duffy, Michael Husby, Kenneth Stein, Pier D Lambiase
BACKGROUND: The subcutaneous implantable cardioverter-defibrillator (S-ICD) was developed to defibrillate ventricular arrhythmias, avoiding drawbacks of transvenous leads. The global EFFORTLESS S-ICD (Evaluation oF FactORs ImpacTing CLinical Outcome and Cost EffectiveneSS of the S-ICD) registry is collecting outcomes in 985 patients during a 5-year follow-up. OBJECTIVES: The primary goal of the EFFORTLESS registry is to determine the safety of the S-ICD by evaluating complications and inappropriate shock rate...
August 15, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28766698/allocation-not-male-resistance-increases-male-frequency-during-epidemics-a-case-study-in-facultatively-sexual-hosts
#16
Jessica L Hite, Rachel M Penczykowski, Marta S Shocket, Katherine A Griebel, Alexander T Strauss, Meghan A Duffy, Carla E Cáceres, Spencer R Hall
Why do natural populations vary in the frequency of sexual reproduction? Virulent parasites may help explain why sex is favored during disease epidemics. To illustrate, we show a higher frequency of males and sexually produced offspring in natural populations of a facultative parthenogenetic host during fungal epidemics. In a multi-year survey of 32 lakes, the frequency of males (an index of sex) was higher in populations of zooplankton hosts with larger epidemics. A lake mesocosm experiment established causality: experimental epidemics produced a higher frequency of males relative to disease-free controls...
August 2, 2017: Ecology
https://www.readbyqxmd.com/read/28765255/malignancy-in-pediatric-onset-systemic-lupus-erythematosus
#17
Sasha Bernatsky, Ann E Clarke, Omid Zahedi Niaki, Jeremy Labrecque, Laura E Schanberg, Earl D Silverman, Kristen Hayward, Lisa Imundo, Hermine I Brunner, Kathleen A Haines, Randy Q Cron, Kiem Oen, Linda Wagner-Weiner, Alan M Rosenberg, Kathleen M O'Neil, Ciarán M Duffy, Emily von Scheven, Lawrence Joseph, Jennifer L Lee, Rosalind Ramsey-Goldman
OBJECTIVE: To determine cancer incidence in a large pediatric-onset systemic lupus erythematosus (SLE) population. METHODS: Data were examined from 12 pediatric SLE registries in North America. Patients were linked to their regional cancer registries to detect cancers observed after cohort entry, defined as date first seen in the clinic. The expected number of malignancies was obtained by multiplying the person-years in the cohort (defined from cohort entry to end of followup) by the geographically matched age-, sex-, and calendar year-specific cancer rates...
October 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28747668/deformability-based-cell-sorting-using-microfluidic-ratchets-enabling-phenotypic-separation-of-leukocytes-directly-from-whole-blood
#18
Quan Guo, Simon P Duffy, Kerryn Matthews, Emel Islamzada, Hongshen Ma
The separation of leukocytes from whole blood is a prerequisite for many biological assays. Traditional methods require significant sample volumes and are often undesirable because they expose leukocytes to harsh physical or chemical treatment. Existing microfluidic approaches can work with smaller volumes, but lack selectivity. In particular, the selectivity of microfluidic systems based on microfiltration is limited by fouling due to clogging. Here, we developed a method to separate leukocytes from whole blood using the microfluidic ratchet mechanism, which filters the blood sample using a matrix of micrometer-scale tapered constrictions...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28712646/live-births-after-embryo-selection-using-morphokinetics-versus-conventional-morphology-a-retrospective-analysis
#19
Simon Fishel, Alison Campbell, Sue Montgomery, Rachel Smith, Lynne Nice, Samantha Duffy, Lucy Jenner, Kathyrn Berrisford, Louise Kellam, Rob Smith, Ivy D'Cruz, Ashley Beccles
The increasing corpus of clinical studies using time-lapse imaging for embryo selection demonstrates considerable variation in study protocols and only limited-sized study cohorts. Outcome measures are based on implantation or clinical pregnancy; some predict blastulation from early cleavage-stage data, and few have evaluated live birth. Erroneously, most studies treat the embryos as independent variables and do not include patient or treatment variables in the statistical analyses. In this study, cohort size was 14,793 patients and 23,762 cycles...
June 23, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28690827/stabilizing-mechanisms-in-a-food-web-with-an-introduced-omnivore
#20
Monica Granados, Sean Duffy, Christopher W McKindsey, Gregor F Fussmann
Intraguild predation (IGP) is an omnivorous food web configuration in which the top predator consumes both a competitor (consumer) and a second prey that it shares with the competitor. This omnivorous configuration occurs frequently in food webs, but theory suggests that it is unstable unless stabilizing mechanisms exist that can decrease the strength of the omnivore and consumer interaction. Although these mechanisms have been documented in native food webs, little is known about whether they operate in the context of an introduced species...
July 2017: Ecology and Evolution
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