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https://www.readbyqxmd.com/read/28531204/messinian-age-and-savannah-environment-of-the-possible-hominin-graecopithecus-from-europe
#1
Madelaine Böhme, Nikolai Spassov, Martin Ebner, Denis Geraads, Latinka Hristova, Uwe Kirscher, Sabine Kötter, Ulf Linnemann, Jérôme Prieto, Socrates Roussiakis, George Theodorou, Gregor Uhlig, Michael Winklhofer
Dating fossil hominids and reconstructing their environments is critically important for understanding human evolution. Here we date the potentially oldest hominin, Graecopithecus freybergi from Europe and constrain the environmental conditions under which it thrived. For the Graecopithecus-bearing Pikermi Formation of Attica/Greece, a saline aeolian dust deposit of North African (Sahara) provenance, we obtain an age of 7.37-7.11 Ma, which is coeval with a dramatic cooling in the Mediterranean region at the Tortonian-Messinian transition...
2017: PloS One
https://www.readbyqxmd.com/read/28531157/hybrid-aware-model-for-senior-wellness-service-in-smart-home
#2
Yuchae Jung
Smart home technology with situation-awareness is important for seniors to improve safety and security. With the development of context-aware computing, wearable sensor technology, and ubiquitous computing, it is easier for seniors to manage their health problem in smart home environment. For monitoring senior activity in smart home, wearable, and motion sensors-such as respiration rate (RR), electrocardiography (ECG), body temperature, and blood pressure (BP)-were used for monitoring movements of seniors. For context-awareness, environmental sensors-such as gas, fire, smoke, dust, temperature, and light sensors-were used for senior location data collection...
May 22, 2017: Sensors
https://www.readbyqxmd.com/read/28531096/the-lys-asp-tyr-triad-within-the-mite-allergen-der-p-1-propeptide-is-a-critical-structural-element-for-the-ph-dependent-initiation-of-the-protease-maturation
#3
Andy Chevigné, Vincenzo Campizi, Martyna Szpakowska, David Bourry, Marie-Eve Dumez, José C Martins, André Matagne, Moreno Galleni, Alain Jacquet
The major house dust mite allergen, Der p 1, is a papain-like cysteine protease expressed as an inactive precursor, proDer p 1, carrying an N-terminal propeptide with a unique structure. The maturation of the zymogen into an enzymatically-active form of Der p 1 is a multistep autocatalytic process initiated under acidic conditions through conformational changes of the propeptide, leading to the loss of its inhibitory ability and its subsequent gradual cleavage. The aims of this study were to characterize the residues present in the Der p 1 propeptide involved in the initiation of the zymogen maturation process, but also to assess the impact of acidic pH on the propeptide structure, the activity of Der p 1 and the fate of the propeptide...
May 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28529118/early-life-allergen-and-air-pollutant-exposures-alter-longitudinal-blood-immune-profiles-in-infant-rhesus-monkeys
#4
Candace M Crowley, Justin H Fontaine, Joan E Gerriets, Edward S Schelegle, Dallas M Hyde, Lisa A Miller
Early life is a critical period for the progressive establishment of immunity in response to environmental stimuli; the impact of airborne challenges on this process is not well defined. In a longitudinal fashion, we determined the effect of episodic house dust mite (HDM) aerosol and ozone inhalation, both separately and combined, on peripheral blood immune cell phenotypes and cytokine expression from 4 to 25weeks of age in an infant rhesus monkey model of childhood development. Immune profiles in peripheral blood were compared with lung lavage at 25weeks of age...
May 18, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28528474/toxicity-assessment-of-ash-and-dust-from-handmade-gold-jewelry-manufacturing-workshops-in-bangladesh
#5
Arif M Sikder, Tanvir Hossain, Manzurul H Khan, M Aziz Hasan, M Fakhruzzaman, Joseph B Turner, Dmitry Pestov, Leigh S McCallister, K Maudood Elahi
Traditionally, handmade gold jewelry played a very important role in the cultural heritage of Bangladesh. Goldsmiths still are partially using ancient manufacturing process with coal fire, candle flame blowing, and nitric and sulfuric acid treatments. Such process leads to the contamination of workplace with the dust of toxic metals, acidic vapors, and particles of different natures. To evaluate contamination by particulate matter (PM), the passive particle collectors were installed in different manufacturing units for a period of 85 days at Tanti Bazar, Dhaka, Bangladesh...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28528420/soil-or-dust-for-health-risk-assessment-studies-in-urban-environment
#6
M Gabarrón, A Faz, J A Acosta
To identify the best material (soil or dust) to be selected for health-risk assessment studies, road dust and urban soil from three cities with different population densities were collected, and size fractions were analysed for metal content (Pb, Zn, Cu, Cd, Cr, Co, and Ni). Results showed similar distribution of the size particles among cities, predominating fractions between 75 and 2000 μm in road dust and particles below 75 μm in soil. Metals were mainly bound to PM10 in both soil and road dust increasing the risk of adverse health effects, overall through inhalation exposure...
May 20, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28528011/vitreous-seeds-in-retinoblastoma-clinicopathologic-classification-and-correlation
#7
Alec L Amram, Grecia Rico, Jonathan W Kim, Murali Chintagumpala, Cynthia E Herzog, Dan S Gombos, Patricia Chévez-Barrios
PURPOSE: A recent classification scheme for retinoblastoma vitreous seeds has shown promise in predicting treatment response. For the first time, we correlate this clinical classification scheme with its histopathologic features. DESIGN: Retrospective review. PARTICIPANTS: Enucleated eyes received at the pathology department of the Retinoblastoma Center of Houston from 2010 to 2015. METHODS: Macroscopic photographs of the enucleated eyes of patients with retinoblastoma were analyzed to select those with vitreous seeds...
May 17, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28526767/migraine-and-cerebrovascular-atherosclerosis-in-patients-with-ischemic-stroke
#8
Hendrikus J A van Os, Inge A Mulder, Alexander Broersen, Ale Algra, Irene C van der Schaaf, L Jaap Kappelle, Birgitta K Velthuis, Gisela M Terwindt, Wouter J Schonewille, Marieke C Visser, Michel D Ferrari, Marianne A A van Walderveen, Marieke J H Wermer
BACKGROUND AND PURPOSE: Migraine is a well-established risk factor for ischemic stroke, but migraine is also related to other vascular diseases. This study aims to investigate the association between migraine and cerebrovascular atherosclerosis in patients with acute ischemic stroke. METHODS: We retrieved data on patients with ischemic stroke from the DUST (Dutch Acute Stroke Study). Migraine history was assessed with a migraine screener and confirmed by telephone interview based on the ICHD criteria (International Classification of Headache Disorders)...
May 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28526682/aeroallergens-induce-reactive-oxygen-species-production-and-dna-damage-and-dampen-antioxidant-responses-in-bronchial-epithelial-cells
#9
Tze Khee Chan, W S Daniel Tan, Hong Yong Peh, W S Fred Wong
Exposure to environmental allergens is a major risk factor for asthma development. Allergens possess proteolytic activity that is capable of disrupting the airway epithelium. Although there is increasing evidence pointing to asthma as an epithelial disease, the underlying mechanism that drives asthma has not been fully elucidated. In this study, we investigated the direct DNA damage potential of aeroallergens on human bronchial epithelial cells and elucidated the mechanisms mediating the damage. Human bronchial epithelial cells, BEAS-2B, directly exposed to house dust mites (HDM) resulted in enhanced DNA damage, as measured by the CometChip and the staining of DNA double-strand break marker, γH2AX...
May 19, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28526624/guideline-recommendations-on-the-use-of-allergen-immunotherapy-in-house-dust-mite-allergy-time-for-a-change
#10
Moisés A Calderón, Jean Bousquet, G Walter Canonica, Lars-Olaf Cardell, Dolores Hernandez Fernandez de Rojas, Jörg Kleine-Tebbe, Pascal Demoly
Guidelines on the treatment of asthma, allergic rhinitis (AR) and allergen immunotherapy (AIT) lack recommendations for house dust mite (HDM) allergy. An expert panel reviewed current guidelines in the light of new data, to assess whether guidelines could be improved. Most guidelines and key position papers did not provide specific recommendations on treatment of allergic asthma (AA) caused by HDM allergy, although some included AIT as a treatment option for AA in general. Around half of the guidelines stated that AIT with HDM extract was an effective treatment for AR, with several indicating sublingual immunotherapy (SLIT) as an option...
May 16, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28526404/airborne-polycyclic-aromatic-hydrocarbons-trigger-human-skin-cells-aging-through-aryl-hydrocarbon-receptor
#11
Yuan Qiao, Qiang Li, Hong-Yang Du, Qiao-Wei Wang, Ye Huang, Wei Liu
Accumulating evidence suggests that polycyclic aromatic hydrocarbons (PAH) which adsorbed on the surface of ambient air particulate matters (PM), are the major toxic compound to cause cardiovascular and respiratory diseases, even cancer. However, its detrimental effects on human skin cell remain unclear. Here, we demonstrated that SRM1649b, a reference urban dust material of PAH, triggers human skin cells aging through cell cycle arrest, cell growth inhibition and apoptosis. Principally, SRM1649b facilitated Aryl hydrocarbon receptor (AhR) translocated into nucleus, subsequently activated ERK/MAPK signaling pathway, and upregulated aging-related genes expression...
May 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28525835/emerging-and-legacy-flame-retardants-in-uk-human-milk-and-food-suggest-slow-response-to-restrictions-on-use-of-pbdes-and-hbcdd
#12
Fang Tao, Mohamed Abou-Elwafa Abdallah, Danielle C Ashworth, Philippa Douglas, Mireille B Toledano, Stuart Harrad
The legacy flame retardants (LFRs) polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDD), together with six emerging flame retardants (EFRs) were measured in United Kingdom (UK) human milk collected in 2010 (n=25) and 2014-15 (n=10). These data are the first report of the presence of EFRs in UK human milk. The most abundant EFR was β-tetrabromoethylcyclohexane (DBE-DBCH) (average=2.5ng/g lw; geometric mean=1.5ng/g lw), which is comparable to the concentrations of the most abundant LFRs i...
May 16, 2017: Environment International
https://www.readbyqxmd.com/read/28524880/iron-limitation-of-microbial-phosphorus-acquisition-in-the-tropical-north-atlantic
#13
T J Browning, E P Achterberg, J C Yong, I Rapp, C Utermann, A Engel, C M Moore
In certain regions of the predominantly nitrogen limited ocean, microbes can become co-limited by phosphorus. Within such regions, a proportion of the dissolved organic phosphorus pool can be accessed by microbes employing a variety of alkaline phosphatase (APase) enzymes. In contrast to the PhoA family of APases that utilize zinc as a cofactor, the recent discovery of iron as a cofactor in the more widespread PhoX and PhoD implies the potential for a biochemically dependant interplay between oceanic zinc, iron and phosphorus cycles...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28524802/effects-of-occupational-silica-exposure-on-oxidative-stress-and-immune-system-parameters-in-ceramic-workers-in-turkey
#14
Hatice Gul Anlar, Merve Bacanli, Servet İritaş, Ceylan Bal, Türker Kurt, Engin Tutkun, O Hinc Yilmaz, Nursen Basaran
Silica is the second most common element after oxygen, and therefore, exposures to crystalline silica dust occur in a large variety of occupations such as metal foundries, constructions, and ceramic, quarry, and pottery industries. Since crystalline silica exposure has been linked with silicosis, lung cancer, and other pulmonary diseases, adverse effect attributed to this element has be a cause for concern worldwide. Silica dust exposure in workers is still considered to be important health problem especially in developing countries...
May 19, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28522696/apolipoprotein-a-i-mimetic-peptides-discordance-between-in-vitro-and-in-vivo-properties
#15
Michael Ditiatkovski, Jonatan Palsson, Jaye Chin-Dusting, Alan T Remaley, Dmitri Sviridov
OBJECTIVE: Apolipoprotein A-I (apoA-I) mimetic peptides have antiatherogenic properties of high-density lipoprotein in vitro and have been shown to inhibit atherosclerosis in vivo. It is unclear, however, if each in vitro antiatherogenic property of these peptides translates to a corresponding activity in vivo, and if so, which of these contributes most to reduce atherosclerosis. APPROACH AND RESULTS: The effect of 7 apoA-I mimetic peptides, which were developed to selectively reproduce a specific component of the antiatherogenic properties of apoA-I, on the development of atherosclerosis was investigated in apolipoprotein E-deficient mice fed a high-fat diet for 4 or 12 weeks...
May 18, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28522399/anti-allergic-and-profilaggrin-proflg-mrna-expression-modulatory-effects-of-sacran
#16
Nlandu R Ngatu, Keiichi Motoyama, Yasumitsu Nishimura, Maiko Kaneko Okajima, Ryoji Hirota, Taishi Higashi, Suni Lee, Hidetoshi Arima, Mitsunori Ikeda, Sayumi Nojima, Tatsuo Kaneko
Atopic dermatitis (AD) is a skin disorder characterized by filaggrin (FLG) defect. We evaluated sacran's effects on dust-mite extracts (DME)-induced AD-like disease and also its effect on profilaggrin (proFLG) in a murine model of 2,4-dinitroflurobenze (DNFB)-induced contact hypersensitivity. In the murine AD-like disease model, allergic NC/Nga mice (N=60) were randomly divided into five treatment groups of 12 animals each: 0.2% and 1%sacran; 0.1% Tacrolimus; Vaseline and buffer-treated controls. Blood samples were drawn and serum levels of representative Th-1, Th-2 and also Th-17 (IL-17A) cytokines were assayed by Cytometric Bead Array (CBA)...
May 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28521165/alteration-of-trace-element-concentrations-in-plants-by-adhering-particles-methods-of-correction
#17
Solveig Pospiech, Wiebke Fahlbusch, Benedikt Sauer, Tino Pasold, Hans Ruppert
Trace element concentrations in plants may be influenced by airborne dust or adhering soil particles. Neglecting adhering particles in plant tissue leads to misinterpretation of trace element concentrations in research fields such as phytomining, phytoremediation, bio-monitoring, uptake of micronutrients and provenance studies. In case washing or brushing the samples prior to analysis is insufficient or impossible due to fragile or pre-processed samples mathematical correction should be applied. In this study three methods are presented allowing to subtract the influence of adhering particles in order to obtain the element concentrations in plants resulting only from uptake...
May 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28515403/analysis-of-wheat-allergen-dispersed-in-air-by-the-action-of-three-types-of-flour-sifter
#18
Hiroyuki Hashimoto, Masato Yoshimitsu, Kyohei Kiyota
BACKGROUND: Since wheat flour, a cause of food allergy, tends to disperse rapidly in air, it can unintentionally mix other foods during the sieving process. Our aim was to analyze the dispersal of wheat flour dust in air in order to prevent unintentional mixing. METHODS: We measured particle size distribution of wheat flour, photographed the scattered flour for 60 seconds every 10 seconds after sieving through three types of flour sifter, constructed a velocity vector diagram of flour dust dispersal by each type of sifter, and measured the distance of wheat allergen dispersal over 20 minutes using a petri dish and immunochromatographic test...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28515363/lung-cd103-dendritic-cells-restrain-allergic-airway-inflammation-through-il-12-production
#19
Laura Conejero, Sofía C Khouili, Sarai Martínez-Cano, Helena M Izquierdo, Paola Brandi, David Sancho
DCs are necessary and sufficient for induction of allergic airway inflammation. CD11b+ DCs direct the underlying Th2 immunity, but debate surrounds the function of CD103+ DCs in lung immunity and asthma after an allergic challenge. We challenged Batf3-/- mice, which lacked lung CD103+ DCs, with the relevant allergen house dust mite (HDM) as a model to ascertain their role in asthma. We show that acute and chronic HDM exposure leads to defective Th1 immunity in Batf3-deficient mice. In addition, chronic HDM challenge in Batf3-/- mice results in increased Th2 and Th17 immune responses and exacerbated airway inflammation...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28515054/longitudinal-decline-in-lung-function-among-older-construction-workers
#20
John M Dement, Laura S Welch, Knut Ringen, Kim Cranford, Patricia Quinn
BACKGROUND: Occupational exposures to vapours, gasses, dusts and fumes (VGDF) and chest X-ray abnormalities by the International Labour Office (ILO) classification system are associated with reduced lung function, with the majority of published studies being cross-sectional. We examined the effects of VGDF exposures, as well as ILO parenchymal changes, pleural plaque and diffuse pleural thickening (DPT) on reduction in lung function in a longitudinal study. METHODS: Chest radiographs and spirometry for 3150 ageing construction workers enrolled in a medical screening programme with a baseline and at least one follow-up examination were studied...
May 17, 2017: Occupational and Environmental Medicine
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