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https://www.readbyqxmd.com/read/28918338/a-short-term-swimming-speed-alteration-test-with-nauplii-of-artemia-franciscana
#1
Silvia Morgana, Noelia Estévez-Calvar, Chiara Gambardella, Marco Faimali, Francesca Garaventa
The presence of toxicant needs to be assessed within short time in order to effectively protect the aquatic environment from serious threat. Based on the observation that at high temperatures aquatic organisms become more vulnerable to stressors than those maintained at room temperature, a new test was developed. The proposed bioassay consisted in the evaluation of the swimming speed alteration (SSA) of nauplii of Artemia franciscana incubated at 39°C (± 1) for 6h, using a Swimming Behavior Recorder system (SBR)...
September 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28916650/differential-expression-of-mirnas-in-the-respiratory-tree-of-the-sea-cucumber-apostichopus-japonicus-under-hypoxia-stress
#2
Da Huo, Lina Sun, Xiaoni Li, Xiaoshang Ru, Shilin Liu, Libin Zhang, Lili Xing, Hongsheng Yang
Sea cucumber, an important economic species, has encountered high mortality since 2013 in northern China because of seasonal environmental stress such as hypoxia, high temperature, and low salinity. MicroRNAs (miRNAs) are important in regulating gene expression in marine organisms in response to environmental change. In the present study, high-throughput sequencing was used to investigate alterations in miRNA expression in the sea cucumber under different levels of dissolved oxygen (DO). Nine small RNA libraries were constructed from the sea cucumber respiratory trees...
September 15, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28914800/effect-of-clotting-duration-and-temperature-on-bdnf-measurement-in-human-serum
#3
Patrizia Amadio, Leonardo Sandrini, Alessandro Ieraci, Elena Tremoli, Silvia Stella Barbieri
Brain-derived neurothrophic factor (BDNF) is a neurotrophin expressed in different tissues and cells, including neurons, endothelial cells, leukocytes, megakaryocytes and platelets. Modifications of BDNF in plasma and/or in serum are associated with neurodegenerative and psychiatric disorders, cardiovascular diseases, metabolic syndrome and with mortality risk. Indeed, changes in blood levels of BDNF may reflect those of its tissue of origin and/or promote pathological dysfunctions. The measurement of BDNF amount in plasma or in serum has been characterized with particular attention in the impact of different anti-coagulants, clotting duration, temperature (≤21 °C) and delay in blood sample centrifugation as well as in stability of storage...
September 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28914447/are-brown-trout-salmo-trutta-fario-and-rainbow-trout-oncorhynchus-mykiss-two-of-a-kind-a-comparative-study-of-salmonids-to-temperature-influenced-tetracapsuloides-bryosalmonae-infection
#4
C Bailey, H Schmidt-Posthaus, H Segner, T Wahli, N Strepparava
Proliferative kidney disease (PKD) of salmonids caused by Tetracapsuloides bryosalmonae causes high mortalities of wild brown trout (Salmo trutta fario) and farmed rainbow trout (Oncorhynchus mykiss) at elevated water temperatures. Here the aim was to compare the temperature-dependent modulation of T. bryosalmonae in the two salmonid host species, which display different temperature optima. We used a novel experimental set-up in which we exposed brown trout and rainbow trout to an identical quantified low concentration of T...
September 15, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28914171/exploring-the-effects-of-high-temperature-on-mortality-in-four-cities-in-the-philippines-using-various-heat-wave-definitions-in-different-mortality-subgroups
#5
Xerxes T Seposo, Tran Ngoc Dang, Yasushi Honda
BACKGROUND: Sustained high temperatures, specifically heat waves (HW), increase the risk of dying, especially among risk populations, which are highly vulnerable to its additional effect. In developing countries, there are only a few studies which focused on the magnitude of the risks attributed to HWs. OBJECTIVES: This study explored the HW effects using 15 HW definitions through the combination of duration (> 2, > 4, and > 7 consecutive days) and intensity (at the ≥ 90th, ≥ 95th, ≥ 97th, ≥ 98th, and ≥ 99th temperature percentiles)...
2017: Global Health Action
https://www.readbyqxmd.com/read/28913869/fast-growing-oysters-show-reduced-capacity-to-provide-a-thermal-refuge-to-intertidal-biodiversity-at-high-temperatures
#6
Dominic McAfee, Wayne A O'Connor, Melanie J Bishop
1.Ecosystem engineers that modify the thermal environment experienced by associated organisms might assist in the climate change adaptation of species. This depends upon the ability of ecosystem engineers to persist and continue to ameliorate thermal stress under changing climatic conditions - traits that may display significant intraspecific variation. 2.In the physically stressful intertidal, the complex three-dimensional structure of oysters provides shading and traps moisture during aerial exposure at low tide...
September 15, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28912362/sympathetic-function-during-whole-body-cooling-is-altered-in-hypertensive-adults
#7
Jody L Greaney, W Larry Kenney, Lacy M Alexander
During moderate cold exposure, cardiovascular-related morbidity and mortality increase disproportionately in hypertensive adults (HTN); however, the mechanisms underlying this association are not well defined. We hypothesized that whole-body cold stress would evoke exaggerated increases in blood pressure (BP) and muscle sympathetic nerve activity (MSNA) in HTN compared to normotensive adults (NTN) and that sympathetic baroreflex function would be altered during cooling in HTN. MSNA (peroneal microneurography) and beat-to-beat BP (Finometer) were measured continuously in 10 NTN (6M/4W; age 53±3 yrs; resting BP 125±3/79±1 mmHg) and 13 HTN (7M/6W; age 58±2 yrs; resting BP 146±5/88±2 mmHg) during whole-body cooling-induced reductions in mean skin temperature (Tsk; water-perfused suit) from 34...
September 14, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28912148/thermal-imaging-is-a-non-invasive-alternative-to-pet-ct-for-measurement-of-brown-adipose-tissue-activity-in-humans
#8
James Matthew Law, David Edward Morris, Chioma Izzi Engbeaya, Victoria Salem, Christopher Coello, Lindsay Robinson, Maduka Jayasinghe, Rebecca Scott, Roger Gunn, Eugenii Rabiner, Tricia Tan, Waljit Dhillo, Stephen Bloom, Helen Budge, Michael Symonds
Background: Obesity and its metabolic consequences are a major cause of morbidity and mortality. Brown adipose tissue (BAT) utilises glucose and free fatty acids to produce heat, thereby increasing energy expenditure. Effective evaluation of human BAT stimulators is constrained by current standard BAT assessment methods as positron emission tomography-computed tomography (PET-CT) requires exposure to high doses of ionising radiation. Infrared thermography (IRT) is a potential non-invasive, safe alternative, although direct corroboration with PET-CT has not previously been established...
September 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28910392/karyotype-analysis-and-sex-determination-in-australian-brush-turkeys-alectura-lathami
#9
Madison T Ortega, Dustin J Foote, Nicholas Nees, Jason C Erdmann, Charles D Bangs, Cheryl S Rosenfeld
Sexual differentiation across taxa may be due to genetic sex determination (GSD) and/or temperature sex determination (TSD). In many mammals, males are heterogametic (XY); whereas females are homogametic (XX). In most birds, the opposite is the case with females being heterogametic (ZW) and males the homogametic sex (ZZ). Many reptile species lack sex chromosomes, and instead, sexual differentiation is influenced by temperature with specific temperatures promoting males or females varying across species possessing this form of sexual differentiation, although TSD has recently been shown to override GSD in Australian central beaded dragons (Pogona vitticeps)...
2017: PloS One
https://www.readbyqxmd.com/read/28900902/derivation-and-validation-of-a-prognostic-model-for-postoperative-risk-stratification-of-critically-ill-patients-with-faecal-peritonitis
#10
Ascanio Tridente, Julian Bion, Gary H Mills, Anthony C Gordon, Geraldine M Clarke, Andrew Walden, Paula Hutton, Paul A H Holloway, Jean-Daniel Chiche, Frank Stuber, Christopher Garrard, Charles Hinds
BACKGROUND: Prognostic scores and models of illness severity are useful both clinically and for research. The aim of this study was to develop two prognostic models for the prediction of long-term (6 months) and 28-day mortality of postoperative critically ill patients with faecal peritonitis (FP). METHODS: Patients admitted to intensive care units with faecal peritonitis and recruited to the European GenOSept study were divided into a derivation and a geographical validation subset; patients subsequently recruited to the UK GAinS study were used for temporal validation...
September 12, 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28900770/how-regularities-of-mortality-statistics-explain-why-we-age-despite-having-potentially-ageless-somatic-stem-cells
#11
Alexander V Khalyavkin, Vyacheslav N Krut'ko
Researchers working in the area of ageing have found numerous manifestations of this process at the molecular biological level, including DNA and protein damage, accumulation of metabolic by-products, lipids peroxidation, macromolecular cross-linking, non-enzymatic glycosylation, anti-oxidant/pro-oxidant misbalance, rising of pro-inflammatory cytokines, etc. This results in an increase in the proportion of cells in growth arrest, reduction of the rate of information processing, metabolic rate decrease, and decrease in rates of other processes characterizing dynamic aspects of the organism's interaction with its environment...
September 12, 2017: Biogerontology
https://www.readbyqxmd.com/read/28891111/construction-of-polylysine-dendrimer-nanocomposites-carrying-nattokinase-and-their-application-in-thrombolysis
#12
Can Wu, Chunmei Gao, Shaoyu Lü, Xiubin Xu, Na Wen, Shaofei Zhang, Mingzhu Liu
Thrombotic disease has become one of the leading causes of mortality among humans globally. Nattokinase (NK), a novel thrombolytic agent, has attracted the attention of researchers. However, NK is a serine protease that is vulnerable to environmental effects resulting in its inactivation. In this study, polylysine dendrimer (PLLD) was synthesized via divergence-convergence method, and a series of NK/PLLD nanocomposites with different molar ratio was prepared. In addition, NK was successfully incorporated into the cores of PLLD G4 through hydrogen bonds and van der Waals forces...
September 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28888197/does-a-lag-structure-of-temperature-confound-air-pollution-lag-response-relation-simulation-and-application-in-7-major-cities-korea-1998-2013
#13
Honghyok Kim, Michelle L Bell, Jong-Tae Lee
BACKGROUND: Temperature must be controlled when estimating the associations of short-term exposure to air pollution and mortality. Given that multi-country studies have implied temperature has lagged effects, we aim to explore confounding by temperature-lag-response and investigate PM10-lag-mortality relation in 7 cities, Korea. METHODS: In a simulation study, we compared the performance of different methods to control for: the same day temperature, a lagged temperature and distributed lags of temperature...
September 6, 2017: Environmental Research
https://www.readbyqxmd.com/read/28888022/effective-induction-of-death-in-mesothelioma-cells-with-magnetite-nanoparticles-under-an-alternating-magnetic-field
#14
Shofu Matsuda, Eri Nakajima, Takuya Nakanishi, Airi Hitsuji, Hong Zhang, Akane Tanaka, Hiroshi Matsuda, Toshiyuki Momma, Tetsuya Osaka
With the objective of finding an avenue for development of magnetic hyperthermia as an effective mesothelioma treatment, the influence of heating by magnetite nanoparticles (MNPs) with a diameter of ~40nm, which were incorporated into cells and then subjected to AC magnetic field, on induction of cell death was investigated in all three histological subtypes of human mesothelioma cells (i.e., epithelioid NCI-H28, sarcomatoid NCI-H2052, and biphasic MSTO-211H cells). Cellular uptake of MNPs was observed in all cell types, but the amount of MNPs incorporated per cell into MSTO-211H cells was smaller than in NCI-H28 and NCI-H2052 cells...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28886702/safety-and-effectiveness-of-oral-misoprostol-for-induction-of-labour-in-a-resource-limited-setting-a-dose-escalation-study
#15
Marilyn Morris, John W Bolnga, Ovoi Verave, Jimmy Aipit, Allanie Rero, Moses Laman
BACKGROUND: Oral misoprostol as an induction of labour (IOL) agent is rapidly gaining popularity in resource-limited settings because it is cheap, stable at ambient temperatures, and logistically easier to administer compared to dinoprostone and oxytocin. We aim to investigate the safety and effectiveness of a regimen of oral misoprostol in Papua New Guinean women undergoing IOL. METHODS: As part of a prospective dose escalation study conducted at Modilon Hospital in Papua New Guinea, women with a singleton pregnancy in cephalic presentation and an unfavourable cervix who gave written informed consent were administered oral misoprostol, commencing at 25mcg once every 2 h for 4 doses and increased to 50mcg once every 2 h for 8 doses within 24 h...
September 8, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28886602/heat-wave-and-mortality-a-multicountry-multicommunity-study
#16
Yuming Guo, Antonio Gasparrini, Ben G Armstrong, Benjawan Tawatsupa, Aurelio Tobias, Eric Lavigne, Micheline de Sousa Zanotti Stagliorio Coelho, Xiaochuan Pan, Ho Kim, Masahiro Hashizume, Yasushi Honda, Yue-Liang Leon Guo, Chang-Fu Wu, Antonella Zanobetti, Joel D Schwartz, Michelle L Bell, Matteo Scortichini, Paola Michelozzi, Kornwipa Punnasiri, Shanshan Li, Linwei Tian, Samuel David Osorio Garcia, Xerxes Seposo, Ala Overcenco, Ariana Zeka, Patrick Goodman, Tran Ngoc Dang, Do Van Dung, Fatemeh Mayvaneh, Paulo Hilario Nascimento Saldiva, Gail Williams, Shilu Tong
BACKGROUND: Few studies have examined variation in the associations between heat waves and mortality in an international context. OBJECTIVES: We aimed to systematically examine the impacts of heat waves on mortality with lag effects internationally. METHODS: We collected daily data of temperature and mortality from 400 communities in 18 countries/regions and defined 12 types of heat waves by combining community-specific daily mean temperature ≥90th, 92...
August 10, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28885956/combat-casualties-and-severe-shock-risk-factors-for-death-at-role-3-military-facilities
#17
Michelle F Buehner, Brian J Eastridge, James K Aden, Joseph J DuBose, Lorne H Blackbourne, Ramon F Cestero
BACKGROUND: Although significant research has been conducted on combat casualties receiving blood products, there is limited data for the subpopulation presenting in shock. The purpose of this study was to evaluate combat casualties arriving to a role 3 facility with an initial systolic blood pressure (SBP) ≤ 90 in order to identify clinical characteristics and associations between presentation, transfusion therapy, and mortality outcomes. METHODS: The Department of Defense Trauma Registry was queried from 2001 to 2010 for trauma-related casualties who arrived at a role 3 combat surgical facility with a SBP ≤ 90...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28885411/improvement-in-outcomes-of-major-obstetric-hemorrhage-through-systematic-change
#18
Daniel W Skupski, David Brady, Isaac P Lowenwirt, Jason Sample, Stephanie N Lin, Rahul Lohana, Gary S Eglinton
OBJECTIVE: To report the outcomes over 14 years of sustained systematic institutional focus on the care of women with major obstetric hemorrhage, defined as estimated blood loss greater than 1,500 mL. METHODS: A retrospective cohort study of women with major obstetric hemorrhage at our hospital from 2000 to 2014 compares baseline conditions (age, multiparity, prior cesarean delivery, morbidly adherent placenta), morbidity (lowest mean temperature, lowest mean pH, coagulopathy, hysterectomy), and mortality among three time periods (period 1=January 2000 to December 2001, period 2=January 2002 to August 2005, period 3=September 2005 to December 2014)...
September 5, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28882102/monte-carlo-simulation-based-estimation-for-the-minimum-mortality-temperature-in-temperature-mortality-association-study
#19
Whanhee Lee, Ho Kim, Sunghee Hwang, Antonella Zanobetti, Joel D Schwartz, Yeonseung Chung
BACKGROUND: Rich literature has reported that there exists a nonlinear association between temperature and mortality. One important feature in the temperature-mortality association is the minimum mortality temperature (MMT). The commonly used approach for estimating the MMT is to determine the MMT as the temperature at which mortality is minimized in the estimated temperature-mortality association curve. Also, an approximate bootstrap approach was proposed to calculate the standard errors and the confidence interval for the MMT...
September 7, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28881949/heat-tolerance-induction-of-the-indian-meal-moth-lepidoptera-pyralidae-is-accompanied-by-upregulation-of-heat-shock-proteins-and-polyols
#20
Minhyun Kim, Seunghee Lee, Yong Shik Chun, Jahyun Na, Hyeok Kwon, Wook Kim, Yonggyun Kim
The Indian meal moth, Plodia interpunctella, causes massive damage to stored grains and processed foods. Heat treatment has been widely used to control insect pests infesting stored grains. However, heat treatment may result in unsatisfactory control owing to heat tolerance of target insects. This study quantified the heat tolerance and analyzed its induction in P. interpunctella. Susceptibility of P. interpunctella to different high temperatures was assessed in all developmental stages. Heat treatment at 44 °C for 1 h caused significant mortalities to all developmental stages, with late-instar larvae exhibiting the highest tolerance...
August 1, 2017: Environmental Entomology
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