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https://www.readbyqxmd.com/read/29148844/circadian-phase-circadian-period-and-chronotype-are-reproducible-over-months
#1
Thomas Kantermann, Charmane I Eastman
The timing of the circadian clock, circadian period and chronotype varies among individuals. To date, not much is known about how these parameters vary over time in an individual. We performed an analysis of the following five common circadian clock and chronotype measures: 1) the dim light melatonin onset (DLMO, a measure of circadian phase), 2) phase angle of entrainment (the phase the circadian clock assumes within the 24-h day, measured here as the interval between DLMO and bedtime/dark onset), 3) free-running circadian period (tau) from an ultradian forced desynchrony protocol (tau influences circadian phase and phase angle of entrainment), 4) mid-sleep on work-free days (MSF from the Munich ChronoType Questionnaire; MCTQ) and 5) the score from the Morningness-Eveningness Questionnaire (MEQ)...
November 17, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29144169/bright-light-exposure-during-daytime-sleeping-affects-nocturnal-melatonin-secretion-after-simulated-night-work
#2
Shunsuke Nagashima, Madoka Osawa, Hiroto Matsuyama, Wataru Ohoka, Aemi Ahn, Tomoko Wakamura
The guidelines for night and shift workers recommend that after night work, they should sleep in a dark environment during the daytime. However, staying in a dark environment during the daytime reduces nocturnal melatonin secretion and delays its onset. Daytime bright-light exposure after night work is important for melatonin synthesis the subsequent night and for maintaining the circadian rhythms. However, it is not clear whether daytime sleeping after night work should be in a dim- or a bright-light environment for maintaining melatonin secretion...
November 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29143302/convergent-selection-pressures-drive-the-evolution-of-rhodopsin-kinetics-at-high-altitudes-via-non-parallel-mechanisms
#3
Gianni M Castiglione, Ryan K Schott, Frances E Hauser, Belinda S W Chang
Convergent evolution in response to similar selective pressures is a well-known phenomenon in evolutionary biology. Less well understood is how selection drives convergence in protein function, and the underlying mechanisms by which this can be achieved. Here we investigate functional convergence in the visual system of two distantly related lineages of high-altitude adapted Andean and Himalayan catfishes. Statistical analyses revealed in the two high-altitude lineages, a parallel acceleration of evolutionary rates in rhodopsin, the dim-light visual pigment...
November 16, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29135091/remarkably-higher-efficacy-and-a-wider-safety-window-for-nonfrontline-over-first-line-drug-combinations-in-the-adenocarcinoma-colo-320dm-cell-line
#4
Elsa N Garza-Trevino, Martha S Rodriguez-Gonzalez, Paulina Delgado Gonzalez, Yesenia G Alonso-Cruz, Yesenia G Alonso-Cruz, Adolfo Soto-Dominguez, Juan F Gonzalez Guerrero, Yanko Castro-Govea, Emiliano Michel Sanchez, Salvador Said Fernandez, Herminia G Martinez-Rodriguez
PURPOSE: To determine in vitro, the efficacy and safety window of not-front-line and first-line anti-colorectal (CRC) drug combinations. METHODS: The adenocarcinoma cell line Colo 320DM and normal human mesenchymal stem cells derived from adipose tissue were used respectively to determine the anti-CRC efficacy (% of Colo 320DM cell death [CD]) and safety window [SW] - % Colo 320DM percent cancer death (PCD)/% of mesenchymal stem cell's death) of drug combinations, using the adenosine triphosphate-based chemotherapy response assay (ATP-CRA)...
September 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29134614/acute-exercise-during-hemodialysis-prevents-the-decrease-in-natural-killer-cells-in-patients-with-chronic-kidney-disease-a-pilot-study
#5
Maria Isabel Fuhro, Gilson P Dorneles, Francini P Andrade, Pedro R T Romão, Alessandra Peres, Mariane B Monteiro
PURPOSE: To evaluate the acute response of natural killer (NK) cell subsets of chronic kidney disease patients submitted to intradialytic exercise in a randomized crossover study. METHODS: Nine patients were submitted to a single bout of 20-min intradialytic exercise and a control hemodialysis (HD) session with an interval of 7 days between them. Peripheral blood sample was collected at baseline, during HD and immediately after HD in each trial to evaluate the peripheral frequency of NK cells and their subsets (CD3-CD56(bright) and CD3-CD56(dim)), systemic cortisol concentrations, C-reactive protein (CRP), creatine kinase activity (CK), and urea and creatinine levels...
November 13, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29134201/pushing-the-limits-of-photoreception-in-twilight-conditions-the-rod-like-cone-retina-of-the-deep-sea-pearlsides
#6
Fanny de Busserolles, Fabio Cortesi, Jon Vidar Helvik, Wayne I L Davies, Rachel M Templin, Robert K P Sullivan, Craig T Michell, Jessica K Mountford, Shaun P Collin, Xabier Irigoien, Stein Kaartvedt, Justin Marshall
Most vertebrates have a duplex retina comprising two photoreceptor types, rods for dim-light (scotopic) vision and cones for bright-light (photopic) and color vision. However, deep-sea fishes are only active in dim-light conditions; hence, most species have lost their cones in favor of a simplex retina composed exclusively of rods. Although the pearlsides, Maurolicus spp., have such a pure rod retina, their behavior is at odds with this simplex visual system. Contrary to other deep-sea fishes, pearlsides are mostly active during dusk and dawn close to the surface, where light levels are intermediate (twilight or mesopic) and require the use of both rod and cone photoreceptors...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29131980/pedestrians-perception-and-response-towards-vehicles-during-road-crossing-at-nighttime
#7
Venkatesh Balasubramanian, Rahul Bhardwaj
Pedestrian being involved in road traffic accidents (RTA) is about 22% of all road traffic related deaths. In this study, we have estimated the pedestrian's response towards an approaching vehicle and the time taken to correctly recognize it while they crossed the road in dim-light nighttime conditions. This is also extendable to cycles and other low powered vehicles. Thirty volunteers participated in this study. A collection of six videos, which comprised of different vehicle scenarios were shown to each of the participants...
November 10, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/29127575/bright-light-therapy-improves-cancer-related-fatigue-in-cancer-survivors-a-randomized-controlled-trial
#8
Jillian A Johnson, Sheila N Garland, Linda E Carlson, Josée Savard, J Steven A Simpson, Sonia Ancoli-Israel, Tavis S Campbell
PURPOSE: Cancer-related fatigue (CRF) is a common and distressing symptom that can persist after cancer treatment has concluded. Bright light therapy has shown preliminary efficacy in reducing CRF, but its impact on other psychosocial factors is unclear. The purpose was to examine the impact of a 1-month light therapy intervention on fatigue, mood, and quality of life in cancer survivors with fatigue. METHODS: This 4-week blinded randomized controlled trial recruited cancer survivors who met diagnostic criteria for CRF...
November 10, 2017: Journal of Cancer Survivorship: Research and Practice
https://www.readbyqxmd.com/read/29119510/spatiotemporal-fluctuation-analysis-of-molecular-diffusion-laws-in-live-cell-membranes
#9
Francesco Cardarelli
A present challenge of membrane biophysics is deciphering the dynamic behavior of molecules, such as lipids and proteins, within the natural environment of a living-cell membrane. Here, a fluorescence fluctuation-based approach will be described, which makes it possible to probe the "diffusion law" of molecules directly from imaging, in the form of a mean square displacement vs time-delay plot (iMSD), with no need for interpretative models. Of note, the presented approach does not require extraction of the molecular trajectories nor the use of bright fluorophores...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29117518/protein-sequence-and-membrane-lipid-roles-in-the-activation-kinetics-of-bovine-and-human-rhodopsins
#10
Istvan Szundi, Chie Funatogawa, Ying Guo, Elsa C Y Yan, David S Kliger
Rhodopsin is a G protein-coupled receptor found in the rod outer segments in the retina, which triggers a visual response under dim light conditions. Recently, a study of the late, microsecond-to-millisecond kinetics of photointermediates of the human and bovine rhodopsins in their native membranes revealed a complex, double-square mechanism of rhodopsin activation. In this kinetic scheme, the human rhodopsin exhibited more Schiff base deprotonation than bovine rhodopsin, which could arise from the ∼7% sequence difference between the two proteins, or from the difference between their membrane lipid environments...
November 7, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29113330/flow-cytometric-analysis-of-cd64-expression-pattern-and-density-in-the-diagnosis-of-acute-promyelocytic-leukemia-a-multi-center-study-in-shanghai-china
#11
Min Liu, Xiangqin Weng, Shenglan Gong, Hui Chen, Jing Ding, Mengqiao Guo, Xiaoxia Hu, Jianmin Wang, Jianmin Yang, Gusheng Tang
No unified immunophenotypic profiles and corresponding analytic strategies have been established for the rapid diagnosis of acute promyelocytic leukemia (APL) using flow cytometry (FCM). Here we describe a characteristic immunophenotypic panel that can rapidly and accurately distinguish APL from other types of adult acute myeloid leukemia (AML) using only FCM. By comparing APL cells and non-APL AML cells that share APL common immunophenotypes (CD34(-)CD117(+)HLA(-)DR(-)) we found that CD64 was a significant factor that differentiated APL from other AMLs...
October 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/29112016/b-lymphoblastic-leukemia-lymphoma-with-burkitt-like-morphology-and-igh-myc-rearrangement-report-of-3-cases-in-adult-patients
#12
Yiting Li, Gunjan Gupta, Ari Molofsky, Yi Xie, Nader Shihabi, Jane McCormick, Elaine S Jaffe
Isolated MYC rearrangement without other recurrent genetic abnormalities is rare in B lymphoblastic leukemia/lymphoma (B-ALL/LBL), with most cases reported in pediatric patients. We report 3 adult cases with lymphoblasts showing a precursor B cell immunophenotype, and isolated MYC/IGH translocation. All 3 cases occurred in male patients with initial presentation of diffuse lymphadenopathy. Cases 1 and 2 had B-ALL with significantly increased lymphoblasts in peripheral blood and bone marrow. Case 3, a patient with human immunodeficiency virus infection, had the diagnosis of B-LBL made on a retroperitoneal lymph node biopsy and had no peripheral blood or bone marrow involvement...
November 3, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29111217/ruxolitinib-partially-reverses-functional-nk-cell-deficiency-in-patients-with-stat1-gain-of-function-mutations
#13
Alexander Vargas-Hernandez, Emily M Mace, Ofer Zimmerman, Christa S Zerbe, Alexandra F Freeman, Sergio Rosenzweig, Jennifer W Leiding, Troy Torgerson, Matthew C Altman, Edith Schussler, Charlotte Cunningham-Rundles, Ivan K Chinn, Alexandre F Carisey, Imelda C Hanson, Nicholas L Rider, Steven M Holland, Jordan S Orange, Lisa R Forbes
BACKGROUND: Natural Killer (NK) cells are critical innate effector cells whose development is dependent on the JAK-STAT pathway. NK deficiency can result in severe or refractory viral infections. Patients with Signal Transducer and Activator of Transcription (STAT)1 gain of function (GOF) mutations have increased viral susceptibility. OBJECTIVE: We sought to investigate NK cell function in STAT1 GOF patients. METHODS: NK cell phenotype and function were determined in 16 STAT1 GOF patients...
October 27, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29109877/pax5-negative-classical-hodgkin-lymphoma-a-case-report-of-a-rare-entity-and-review-of-the-literature
#14
Elham Vali Betts, Denis M Dwyre, Huan-You Wang, Hooman H Rashidi
Classical Hodgkin lymphoma (CHL) is recognized as a B-cell neoplasm arising from germinal center or postgerminal center B-cells. The hallmark of CHL is the presence of CD30 (+) Hodgkin and Reed-Sternberg (HRS) cells with dim expression of PAX5. Nearly all of the HRS cells are positive for PAX5. However, a small minority of HRS cells may lack PAX5 expression, which can cause a diagnostic dilemma. Herein we describe two cases of PAX5-negative CHL and review of the English literature on this very rare entity. It is crucial to be aware of this phenomenon, which in some cases may lead to misdiagnosis and may ultimately adversely affect patient's management...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/29109441/buildup-of-a-highly-twisted-magnetic-flux-rope-during-a-solar-eruption
#15
Wensi Wang, Rui Liu, Yuming Wang, Qiang Hu, Chenglong Shen, Chaowei Jiang, Chunming Zhu
The magnetic flux rope is among the most fundamental magnetic configurations in plasma. Although its presence after solar eruptions has been verified by spacecraft measurements near Earth, its formation on the Sun remains elusive, yet is critical to understanding a broad spectrum of phenomena. Here we study the dynamic formation of a magnetic flux rope during a classic two-ribbon flare. Its feet are identified unambiguously with conjugate coronal dimmings completely enclosed by irregular bright rings, which originate and expand outward from the far ends of flare ribbons...
November 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/29102140/different-durations-of-whole-raw-soybean-supplementation-during-the-prepartum-period-milk-fatty-acid-profile-and-oocyte-and-embryo-quality-of-early-lactating-holstein-cows
#16
R Gardinal, G D Calomeni, F Zanferari, T H A Vendramini, C S Takiya, T A Del Valle, F P Renno
The objective of this study was to evaluate different durations of whole raw soybeans (WS) supplementation during the prepartum period on nutrient digestibility, milk yield and composition, energy balance, blood metabolites, and oocyte and embryo quality of transition cows. Thirty-one Holstein cows were used in a completely randomized design and assigned to 4 experimental groups (G): G90, G60, G30, and G0 (control), supplemented with a diet containing 12% of WS from 90, 60, 30, and 0 d relative to the calving date, respectively...
October 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29102135/different-durations-of-whole-raw-soybean-supplementation-during-the-prepartum-period-measures-of-cellular-immune-function-in-transition-cows
#17
R Gardinal, G D Calomeni, F Zanferari, T H A Vendramini, C S Takiya, H G Bertagnon, C F Batista, A M M P Della Libera, F P Renno
The objective of this study was to evaluate different durations of whole raw soybean (WS) supplementation (diet rich in n-6 fatty acid) during the prepartum period on cellular immune function of dairy cows in the transition period and early lactation. Thirty-one Holstein cows were used in a completely randomized design and assigned to 4 experimental groups (G) [G90, G60, G30, and G0 (control)] supplemented with a diet containing 12% of WS from 90, 60, 30 and 0 d relative to the calving date, respectively. Cows were dried off 60 d before the expected calving date...
October 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29097992/circadian-and-metabolic-effects-of-light-implications-in-weight-homeostasis-and-health
#18
REVIEW
Santiago A Plano, Leandro P Casiraghi, Paula García Moro, Natalia Paladino, Diego A Golombek, Juan J Chiesa
Daily interactions between the hypothalamic circadian clock at the suprachiasmatic nucleus (SCN) and peripheral circadian oscillators regulate physiology and metabolism to set temporal variations in homeostatic regulation. Phase coherence of these circadian oscillators is achieved by the entrainment of the SCN to the environmental 24-h light:dark (LD) cycle, coupled through downstream neural, neuroendocrine, and autonomic outputs. The SCN coordinate activity and feeding rhythms, thus setting the timing of food intake, energy expenditure, thermogenesis, and active and basal metabolism...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29096379/systematic-identification-of-the-druggable-interactions-between-human-protein-kinases-and-naturally-occurring-compounds-in-endometriosis
#19
Lai Jiang, Chaoliang Tang, Jie Rao, Qing Xue, Hao Wu, Dabao Wu, Aijun Zhang, Ling Chen, Zhen Shen, Lei Lei
Diverse kinase signaling pathways have been involved in the pathogenesis of endometriosis (EM), which can be modulated either by directly targeting the hub kinases or by indirectly regulating marginal members in the pathways. Here, a systematic kinase-inhibitor interaction profile was created for 8 naturally occurring compounds against 20 human protein kinases. The compounds are all non-sterid that have been reported as pharmacologically active molecular entities potential for EM therapeutics, while the kinases were curated via gene ontology terms enriched from the gene co-citation network with EM...
October 16, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29089553/homeostatic-plasticity-shapes-the-visual-system-s-first-synapse
#20
Robert E Johnson, Nai-Wen Tien, Ning Shen, James T Pearson, Florentina Soto, Daniel Kerschensteiner
Vision in dim light depends on synapses between rods and rod bipolar cells (RBCs). Here, we find that these synapses exist in multiple configurations, in which single release sites of rods are apposed by one to three postsynaptic densities (PSDs). Single RBCs often form multiple PSDs with one rod; and neighboring RBCs share ~13% of their inputs. Rod-RBC synapses develop while ~7% of RBCs undergo programmed cell death (PCD). Although PCD is common throughout the nervous system, its influences on circuit development and function are not well understood...
October 31, 2017: Nature Communications
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