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https://www.readbyqxmd.com/read/29166586/the-broad-spectrum-of-human-natural-killer-cell-diversity
#1
REVIEW
Aharon G Freud, Bethany L Mundy-Bosse, Jianhua Yu, Michael A Caligiuri
Natural killer (NK) cells provide protection against infectious pathogens and cancer. For decades it has been appreciated that two major NK cell subsets (CD56(bright) and CD56(dim)) exist in humans and have distinct anatomical localization patterns, phenotypes, and functions in immunity. In light of this traditional NK cell dichotomy, it is now clear that the spectrum of human NK cell diversity is much broader than originally appreciated as a result of variegated surface receptor, intracellular signaling molecule, and transcription factor expression; tissue-specific imprinting; and foreign antigen exposure...
November 21, 2017: Immunity
https://www.readbyqxmd.com/read/29166174/low-prevalence-of-salmonella-and-shiga-toxin-producing-escherichia-coli-in-lymph-nodes-of-australian-beef-cattle
#2
Gavin Bailey, Long Huynh, Lachlan Govenlock, David Jordan, Ian Jenson
Salmonella contamination of ground beef has been viewed as originating from the surface of carcasses. Recent studies have identified lymph nodes as a potential source of Salmonella contamination because these tissues play an active role in containment of pathogens in the live animal and because some lymph nodes are unavoidably present in manufacturing beef trimmings or primal cuts that may be incorporated into ground beef. A survey was conducted of the microbiological status of lymph nodes from Australian cattle at the time of slaughter to determine the prevalence of microbiological contamination...
November 22, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/29166102/testing-the-limits-of-the-maxwell-distribution-of-velocities-for-atoms-flying-nearly-parallel-to-the-walls-of-a-thin-cell
#3
Petko Todorov, Daniel Bloch
For a gas at thermal equilibrium, it is usually assumed that the velocity distribution follows an isotropic 3-dimensional Maxwell-Boltzmann (M-B) law. This assumption classically implies the assumption of a "cos θ" law for the flux of atoms leaving the surface. Actually, such a law has no grounds in surface physics, and experimental tests of this assumption have remained very few. In a variety of recently developed sub-Doppler laser spectroscopy techniques for gases one-dimensionally confined in a thin cell, the specific contribution of atoms moving nearly parallel to the boundary of the vapor container becomes essential...
November 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29165871/shipping-living-donor-kidneys-and-transplant-recipient-outcomes
#4
Eric Treat, Eric K H Chow, John D Peipert, Amy Waterman, Lorna Kwan, Allan B Massie, Alvin G Thomas, Mary Grace Bowring, David Leeser, Stuart Flechner, Marc L Melcher, Sandip Kapur, Dorry L Segev, Jeffrey Veale
Kidney paired donation (KPD) is an important tool to facilitate living donor kidney transplantation (LDKT). Concerns remain over prolonged cold ischemia times (CIT) associated with shipping kidneys long distances through KPD. We examined the association between CIT and delayed graft function (DGF), allograft survival, and patient survival for 1,267 shipped and 205 non-shipped/internal KPD LDKTs facilitated by the National Kidney Registry in the United States from 2008-2015, compared to 4,800 unrelated, non-shipped, non-KPD LDKTs...
November 22, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/29165860/rehabilitation-and-convalescent-hospital-stay-in-new-south-wales-an-analysis-of-3-979-women-aged-75
#5
Catherine Chojenta, Julie Byles, Balakrishnan Kichu Nair
OBJECTIVES: With a rapidly ageing population, it is imperative to examine health service costs and plan appropriately for the future. This paper determines the factors related to extended hospital stay for 'Rehabilitation' or 'Convalescence', as defined by ICD-10 coding, in acute hospital settings for older women in New South Wales, Australia. METHODS: Participants were from the 1921-26 cohort of the Australian Longitudinal Study on Women's Health. For this analysis, self-reported survey data were linked to the NSW Admitted Patient Data Collection and the National Death Index...
November 22, 2017: Australian and New Zealand Journal of Public Health
https://www.readbyqxmd.com/read/29165789/medicaid-cost-savings-of-a-preventive-home-visit-program-for-disabled-older-adults
#6
Sarah L Szanton, Y Natalia Alfonso, Bruce Leff, Jack Guralnik, Jennifer L Wolff, Ian Stockwell, Laura N Gitlin, David Bishai
BACKGROUND/OBJECTIVES: Little is known about cost savings of programs that reduce disability in older adults. The objective was to determine whether the Community Aging in Place, Advancing Better Living for Elders (CAPABLE) program saves Medicaid more money than it costs to provide. DESIGN: Single-arm clinical trial (N = 204) with a comparison group of individuals (N = 2,013) dually eligible for Medicaid and Medicare matched on baseline geographic and demographic characteristics, chronic conditions, and healthcare use...
November 22, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29165780/twitter-weather-warnings-communicating-risk-in-140-characters-the-impact-of-imperative-and-declarative-message-style-on-weather-risk-perception-and-behavioral-intentions
#7
Adam M Rainear, Kenneth A Lachlan, Patric R Spence
Understanding how individuals utilize risk messages is important for protecting lives and gaining compliance toward safe behaviors. Recent advances in technology afford users with timeliness when needing to acquire information, and research investigating imperative and declarative message styles suggests utilizing both strategies is most effective. Similarly, the element of time can play a role when an individual engages in certain behaviors. This study employed an experimental design to better understand how imperative and declarative tweets, and time can contribute to risk perceptions and behavioral intentions...
September 2017: Journal of Emergency Management: JEM
https://www.readbyqxmd.com/read/29165668/electrophysiological-measures-of-aging-pharynx-function-in-c-elegans-reveal-enhanced-organ-functionality-in-older-long-lived-mutants
#8
Joshua Coulter Russell, Nikolay Burnaevskiy, Bridget Ma, Miguel Arenas Mailig, Franklin Faust, Matt Crane, Matt Kaeberlein, Alexander Mendenhall
The function of the pharynx, an organ in the model system Caenorhabditis elegans, has been correlated with lifespan and motility (another measure of health) since 1980. In this study, in order to further understand the relationship between organ function and lifespan, we measured the age-related decline of the pharynx using an electrophysiological approach. We measured and analyzed electropharyngeograms of wild type animals, short-lived hsf-1 mutants, and long-lived animals with genetically decreased insulin signaling or increased heat shock pathway signaling; we recorded a total of 2,478 electropharyngeograms from 1,374 individuals...
November 18, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29165594/revisiting-fis-fst-wahlund-effects-and-null-alleles
#9
Thierry De Meeûs
Null alleles and Wahlund effects are well known causes of heterozygote deficits in empirical population genetics studies as compared to Hardy-Weinberg genotypic expectations. Some authors have theoretically studied the relationship of Wright's FIS computed from subsamples displaying a Wahlund effect and FST before the Wahlund effect, as can occasionally be obtained from populations of long-lived organisms. In the two subsample case, a positive relationship between these two parameters across loci would represent a signature of Wahlund effects...
November 20, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/29165560/aging-with-long-term-mobility-impairment-maintaining-activities-of-daily-living-via-selection-optimization-and-compensation
#10
Elena T Remillard, Cara Bailey Fausset, Walter Brad Fain, Barbara J Bowers
Background and Objectives: There is a growing number of adults with long-term mobility impairment aging into the older adult population. Little is known about the experiences of these individuals in maintaining activities of daily living (ADLs) and instrumental activities of daily living (IADLs) as they face age-related changes in addition to a pre-existing mobility impairment. Research Design and Methods: Through in-home interviews with 21 participants (ages 52-86) with long-term mobility impairment, the present study employed a qualitative description design to explore perceptions of how and why select ADL/IADL routines (e...
November 19, 2017: Gerontologist
https://www.readbyqxmd.com/read/29165486/optical-control-of-mitochondrial-reductive-reactions-in-living-cells-using-an-electron-donor-acceptor-linked-molecule
#11
Yuta Takano, Reina Munechika, Vasudevanpillai Biju, Hideyoshi Harashima, Hiroshi Imahori, Yuma Yamada
It has been known for decades that intracellular redox reactions control various vital functions in living systems, which include the synthesis of biomolecules, the modulation of protein functions, and cell signaling. Although there have been several reports on the control of such functions using DNA and RNA, the non-invasive optical control of biological functions is an important ongoing challenge. In this study, a hybrid of an electron donor-acceptor linked molecule based on a ferrocene(Fc)-porphyrin(ZnP)-fullerene(C60) analogue and an elaborately designed nano-carrier, referred to herein as a MITO-Porter, resulted in a successful photoinduced intermolecular electron transfer reaction via the long-lived intramolecular charge separation, leading to site-specific reductive reactions in the mitochondria of living HeLa cells...
November 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/29165127/perspectives-acquired-through-long-term-epidemiological-studies-on-the-great-east-japan-earthquake
#12
REVIEW
Toru Tsuboya, Mariko Inoue, Michihiro Satoh, Kei Asayama
The Great East Japan Earthquake (GEJE) and subsequent tsunamis that occurred in 2011 caused extensive and severe structural damage and interrupted numerous research activities; however, the majority of such activities have been revived, and further public health researches and activities have started to follow the population affected by the disaster. In this mini-review, we overview our recent activities regarding epidemiologic studies in Miyagi Prefecture, the region most affected by the GEJE. Through our study processes, we were able to identify the particular characteristics of vulnerable populations, and provide ideas that may help save lives and reduce the amount of damage caused by a future disaster...
March 15, 2017: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29165120/high-prevalence-of-dental-fluorosis-among-adolescents-is-a-growing-concern-a-school-based-cross-sectional-study-from-southern-india
#13
Anand Verma, Bharatesh K Shetty, Vasudeva Guddattu, Mehul K Chourasia, Prachi Pundir
BACKGROUND: Fluorosis, caused by ingestion of excessive amount of fluoride through food or water, is a major public health problem in India. This study was undertaken to quantify the dental fluorosis burden among school going adolescents and to find factors associated with dental fluorosis in Kolar taluka, Karnataka, India. METHODS: A total of 1026 high school adolescents (12-17 years) were enrolled from different schools selected by stratified sampling method. Dental examination was done to record Dean's fluorosis index, and socio-demographic, food consumption and oral hygiene data were recorded using a pre-tested structured questionnaire...
April 4, 2017: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29165097/a-predictive-model-of-the-prevalence-of-delirium-in-elderly-subjects-admitted-to-nursing-homes
#14
Pilar Perez-Ros, Francisco Miguel Martinez-Arnau, Susana Baixauli-Alacreu, Jose Fermin Garcia-Gollarte, Francisco Tarazona-Santabalbina
INTRODUCTION: Delirium is common in geriatric patients admitted to nursing homes, with an incidence of 22-79% among long-term residents. AIM: To establish a predictive model of the risk of delirium episodes in a sample of elderly people living in nursing homes. MATERIAL AND METHODS: A retrospective, cross-sectional case-control study covering a period of 12 consecutive months (April 2014 - March 2015) was carried out. The included cases had suffered at least one episode of delirium during the study period...
November 20, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/29164888/long-lived-domain-wall-plasmons-in-gapped-bilayer-graphene
#15
Eddwi H Hasdeo, Justin C W Song
Topological domain walls in dual-gated gapped bilayer graphene host edge states that are gate-tunable and valley polarized. Here we predict that plasmonic collective modes can propagate along these topological domain walls even at zero bulk density and possess a markedly different character from that of bulk plasmons. Strikingly, domain wall plasmons are extremely long-lived with plasmon lifetimes that can be orders of magnitude larger than the transport scattering time in the bulk at low temperatures. Importantly, long domain wall plasmon lifetimes persist even at room temperature with values up to a few picoseconds...
November 22, 2017: Nano Letters
https://www.readbyqxmd.com/read/29164812/inter-and-intraspecific-variability-of-nitrogenated-compounds-in-gorgonian-corals-via-application-of-a-fast-one-step-analytical-protocol
#16
Chiara Samorì, Federica Costantini, Paola Galletti, Emilio Tagliavini, Marco Abbiati
Gorgonian corals play a structural role in temperate and tropical biogenic reefs, forming animal forests and creating biodiversity hot spots. In the Mediterranean Sea, slow-growing and long-lived gorgonian species are threatened by human disturbances and global environmental changes and concern about their conservation is rising. Alkaloid metabolites have proven to be essential in protecting these species from environmental stressors.. Traditional profiling methodologies to detect these metabolites require a large quantity of living tissue...
November 21, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29164616/protection-against-%C3%AE-amyloid-neurotoxicity-by-a-non-toxic-endogenous-n-terminal-%C3%AE-amyloid-fragment-and-its-active-hexapeptide-core-sequence
#17
Kelly H Forest, Naghum Alfulaij, Komal Arora, Ruth Taketa, Tessi Sherrin, Cedomir Todorovic, James L M Lawrence, Gene T Yoshikawa, Ho-Leung Ng, Victor J Hruby, Robert A Nichols
High levels (μM) of beta amyloid (Aβ) oligomers are known to trigger neurotoxic effects, leading to synaptic impairment, behavioral deficits and apoptotic cell death. The hydrophobic C-terminal domain of Aβ, together with sequences critical for oligomer formation, is essential for this neurotoxicity. However, Aβ at low levels (pM-nM) has been shown to function as a positive neuromodulator and this activity resides in the hydrophilic N-terminal domain of Aβ. An N-terminal Aβ fragment (1-15/16), found in cerebrospinal fluid, was also shown to be a highly active neuromodulator and to reverse Aβ-induced impairments of long-term potentiation...
November 21, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29164369/birth-date-promotes-a-tortoise-or-hare-tactic-for-body-mass-development-of-a-long-lived-male-ungulate
#18
Eric S Michel, Stephen Demarais, Bronson K Strickland, Guiming Wang
Maternal and early-life influences may affect life-long individual phenotype, potentially influencing reproductive success. However, some individuals may compensate for a poor start to life, which may improve longevity and reproductive success later in life. We developed four models to assess whether maternal characteristics (age, body mass and previous year cumulative lactation demand) and/or birth date influenced a long-lived mammal's phenotype to maturity. We used a directional separation analysis to assess the relative influence of each maternal characteristic and birth date on captive male white-tailed deer (Odocoileus virginianus) body mass and antler size...
November 21, 2017: Oecologia
https://www.readbyqxmd.com/read/29164142/pathogenesis-molecular-genetics-and-genomics-of-mycobacterium-avium-subsp-paratuberculosis-the-etiologic-agent-of-johne-s-disease
#19
REVIEW
Govardhan Rathnaiah, Denise K Zinniel, John P Bannantine, Judith R Stabel, Yrjö T Gröhn, Michael T Collins, Raúl G Barletta
Mycobacterium avium subsp. paratuberculosis (MAP) is the etiologic agent of Johne's disease in ruminants causing chronic diarrhea, malnutrition, and muscular wasting. Neonates and young animals are infected primarily by the fecal-oral route. MAP attaches to, translocates via the intestinal mucosa, and is phagocytosed by macrophages. The ensuing host cellular immune response leads to granulomatous enteritis characterized by a thick and corrugated intestinal wall. We review various tissue culture systems, ileal loops, and mice, goats, and cattle used to study MAP pathogenesis...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29163966/risk-factors-and-survival-outcomes-of-biliary-complications-after-adult-to-adult-living-donor-liver-transplantation
#20
Seogsong Jeong, Xin Wang, Ping Wan, Meng Sha, Jianjun Zhang, Lei Xia, Ying Tong, Yi Luo, Qiang Xia
The objective of this study was to evaluate the risk factors and survival outcomes of biliary complications (BCs) after living donor liver transplantation (LDLT) based on our single-center experience. From 2007 to 2010, 112 adult patients were assessed. Forty-nine patients (43.8%) experienced at least one episode of BCs, including biliary stricture and bile leak, occurring in 37.5% and 16.1% of the patients, respectively. Multivariate analysis indicated that hepatic artery thrombosis (relative risk (RR), 5...
November 2017: United European Gastroenterology Journal
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