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https://www.readbyqxmd.com/read/28338970/woody-plant-ecosystems-under-climate-change-and-air-pollution-response-consistencies-across-zonobiomes
#1
R Matyssek, A R Kozovits, G Wieser, J King, H Rennenberg
Forests store the largest terrestrial pools of carbon (C), helping to stabilize the global climate system, yet are threatened by climate change (CC) and associated air pollution (AP, highlighting ozone (O3) and nitrogen oxides (NOx)). We adopt the perspective that CC-AP drivers and physiological impacts are universal, resulting in consistent stress responses of forest ecosystems across zonobiomes. Evidence supporting this viewpoint is presented from the literature on ecosystem gross/net primary productivity and water cycling...
March 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338675/biogeography-and-diversity-of-collodaria-radiolaria-in-the-global-ocean
#2
Tristan Biard, Estelle Bigeard, Stéphane Audic, Julie Poulain, Andres Gutierrez-Rodriguez, Stéphane Pesant, Lars Stemmann, Fabrice Not
Collodaria are heterotrophic marine protists that exist either as large colonies composed of hundreds of cells or as large solitary cells. All described species so far harbour intracellular microalgae as photosymbionts. Although recent environmental diversity surveys based on molecular methods demonstrated their consistently high contribution to planktonic communities and their worldwide occurrence, our understanding of their diversity and biogeography is still very limited. Here we estimated the 18S ribosomal DNA (rDNA) gene copies per collodarian cell for solitary (5770±1960 small subunit (SSU) rDNA copies) and colonial specimens (37 474±17 799 SSU rDNA copies, for each individual cell within a colony) using single-specimen quantitative PCR...
March 24, 2017: ISME Journal
https://www.readbyqxmd.com/read/28336476/associations-of-water-balance-and-thermal-sensitivity-of-toads-with-macroclimatic-characteristics-of-geographical-distribution
#3
Braz Titon, Fernando Ribeiro Gomes
Interspecific variation in patterns of geographical distribution of phylogenetically related species of amphibians might be related to physiological adaptation to different climatic conditions. In this way, a comparative study of resistance to evaporative water loss, rehydration rates and sensitivity of locomotor performance to variations on hydration level and temperature was performed for five species of Bufonidae toads (Rhinella granulosa, R. jimi, R. ornata, R. schneideri and R. icterica) inhabiting different Brazilian biomes...
March 20, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28335839/apolipoprotein-l1-variants%C3%A2-and-blood-pressure-traits-in%C3%A2-african-americans
#4
Girish N Nadkarni, Geneviève Galarneau, Stephen B Ellis, Rajiv Nadukuru, Jinglan Zhang, Stuart A Scott, Claudia Schurmann, Rongling Li, Laura J Rasmussen-Torvik, Abel N Kho, M Geoffrey Hayes, Jennifer A Pacheco, Teri A Manolio, Rex L Chisholm, Dan M Roden, Joshua C Denny, Eimear E Kenny, Erwin P Bottinger
BACKGROUND: African Americans (AA) are disproportionately affected by hypertension-related health disparities. Apolipoprotein L1 (APOL1) risk variants are associated with kidney disease in hypertensive AAs. OBJECTIVES: This study assessed the APOL1 risk alleles' association with blood pressure traits in AAs. METHODS: The discovery cohort included 5,204 AA participants from Mount Sinai's BioMe biobank. Replication cohorts included additional BioMe (n = 1,623), Vanderbilt BioVU (n = 1,809), and Northwestern NUgene (n = 567) AA biobank participants...
March 28, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28334520/new-approach-for-vertical-bone-regeneration-using-in-situ-gelling-and-sustained-bmp-2-releasing-poly-phosphazene-hydrogel-system-on-peri-implant-site-with-critical-defect-in-a-canine-model
#5
Bo-Bae Seo, Hae-Im Chang, Hyuck Choi, Jeong-Tae Koh, Kwi-Dug Yun, Jae-Yeol Lee, Soo-Chang Song
An injectable hydrogel system with sustained bone morphogenetic protein 2 (BMP-2) release ability was developed for vertical bone regeneration at peri-implant sites and enhanced osseointegration of dental implants. In three young male beagle dogs, a pair of defects was created on both sides of the mandibular bone. Next, two implants were transplanted into each defect. In situ gelling polymer solutions with or without BMP-2 were applied to cover the implants and mandibular defects. The effects of the in situ gelling and sustained BMP-2 releasing (IGSR) hydrogel system on peri-implant bone regeneration were evaluated by radiologic examination, micro-computed tomography, and histomorphometric analysis...
March 23, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28334507/comparative-study-of-cytotoxicity-and-genotoxicity-of-commercial-jeffamines%C3%A2-and-polyethylenimine-in-cho-k1-cells
#6
Leniher Castan, Cristiano José da Silva, Eduardo Ferreira Molina, Raquel Alves Dos Santos
Jeffamines(®) are a family of polymers containing primary amine groups attached to the extremities of polyether backbone which can be used as biomaterials. They have been used in combination with polyethylenimine (PEI) to improve biocompatibility in drug and gene delivery systems. Despite these facts, very few studies have been done on cytotoxicity and genotoxicity of pure Jeffamines(®) or compared with PEI. The present study aimed to evaluate and compare the cytotoxic and genotoxic effects of Jeffamines(®) and PEI in CHO-K1 cells...
March 23, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28334073/do-distinct-biomes-influence-the-cuticular-chemical-profile-in-orchid-bees
#7
A B Santos, F S Nascimento
Cuticular chemical profiles of Euglossa cordata L. males were analyzed to test whether ecological predictors affect their composition and relative proportion. Males were collected in areas of Caatinga and Atlantic Forest from Brazil during two distinct seasonal periods. We found 48 compounds from the cuticular extracts of males, which consisted of hydrocarbons (71.39%), acetates (16.79%), esters (10.5%), alcohols and others (1.31%). We verified that when specimens were separated between biomes, they did not show a qualitative differentiation, but a small quantitative variation of compounds was found between some alkanes...
February 17, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334046/enhancing-sampling-design-in-mist-net-bat-surveys-by-accounting-for-sample-size-optimization
#8
Leonardo Carreira Trevelin, Roberto Leonan Morim Novaes, Paul François Colas-Rosas, Thayse Cristhina Melo Benathar, Carlos A Peres
The advantages of mist-netting, the main technique used in Neotropical bat community studies to date, include logistical implementation, standardization and sampling representativeness. Nonetheless, study designs still have to deal with issues of detectability related to how different species behave and use the environment. Yet there is considerable sampling heterogeneity across available studies in the literature. Here, we approach the problem of sample size optimization. We evaluated the common sense hypothesis that the first six hours comprise the period of peak night activity for several species, thereby resulting in a representative sample for the whole night...
2017: PloS One
https://www.readbyqxmd.com/read/28332165/low-microchimeric-cell-density-in-tumors-suggests-alternative-antineoplastic-mechanism
#9
Timothy W Jolis, Brenna M Brucker, Christoph Schorl, James N Butera, Peter J Quesenberry
Microchimerism has generally been shown to protect against cancer (Gilmore et al. in Exp Hematol 36(9):1073-1077, 2008). The mechanism of how this occurs is an area of intense study, as it may lead to new cancer treatments. The leading theory is that microchimeric cells perform immune surveillance by directly fighting cancerous cells and that they also act as stem cells, repairing damaged tissue (Khosrotehrani et al. in JAMA 292:75-80, 2004). However, there is conflicting evidence to support this theory. Several small studies have found few microchimeric cells in tumor tissue (Gadi in Breast Cancer Res Treat 121(1):241-244, 2010; Cirello et al...
April 2017: Medical Oncology
https://www.readbyqxmd.com/read/28326541/manipulating-the-baby-biome-what-are-the-issues
#10
Lai-Yang Lee, Suzanne M Garland, Michelle L Giles, Andrew J Daley
Establishing a baby biome through the controversial practice of 'vaginal seeding' has generated interest among the general public and healthcare providers alike. We discuss the potential risks of this practice and offer a harm minimisation approach to managing women requesting vaginal microbiome transfer after delivery by caesarean section.
March 22, 2017: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28325976/arthropod-and-oligochaete-assemblages-from-grasslands-of-the-southern-kenai-peninsula-alaska
#11
Matthew L Bowser, John M Morton, John Delton Hanson, Dawn R Magness, Mallory Okuly
BACKGROUND: By the end of this century, the potential climate-biome of the southern Kenai Peninsula is forecasted to change from transitional boreal forest to prairie and grasslands, a scenario that may already be playing out in the Caribou Hills region. Here, spruce (Picea × lutzii Little [glauca × sitchensis]) forests were heavily thinned by an outbreak of the spruce bark beetle (Dendroctonus rufipennis (Kirby, 1837)) and replaced by the native but invasive grass species, Calamagrostis canadensis (Michx...
2017: Biodiversity Data Journal
https://www.readbyqxmd.com/read/28324174/combining-climatic-and-soil-properties-better-predicts-covers-of-brazilian-biomes
#12
Daniel M Arruda, Elpídio I Fernandes-Filho, Ricardo R C Solar, Carlos E G R Schaefer
Several techniques have been used to model the area covered by biomes or species. However, most models allow little freedom of choice of response variables and are conditioned to the use of climate predictors. This major restriction of the models has generated distributions of low accuracy or inconsistent with the actual cover. Our objective was to characterize the environmental space of the most representative biomes of Brazil and predict their cover, using climate and soil-related predictors. As sample units, we used 500 cells of 100 km(2) for ten biomes, derived from the official vegetation map of Brazil (IBGE 2004)...
April 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/28323397/in-vivo-response-to-decellularized-mesothelium-scaffolds
#13
Michael J Cronce, Renea A Faulknor, Irina Pomerantseva, Xiang-Hong Liu, Scott M Goldman, Emmanuel C Ekwueme, Olive Mwizerwa, Craig M Neville, Cathryn A Sundback
Biological surgical scaffolds are used in plastic and reconstructive surgery to support structural reinforcement and regeneration of soft tissue defects. Macrophage and fibroblast cell populations heavily regulate scaffold integration into host tissue following implantation. In the present study, the biological host response to a commercially available surgical scaffold (Meso BioMatrix Surgical Mesh (MBM)) was investigated for up to 9 weeks after subcutaneous implantation; this scaffold promoted superior cell migration and infiltration previously in in vitro studies relative to other commercially available scaffolds...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28323392/influence-of-steel-implant-surface-microtopography-on-soft-and-hard-tissue-integration
#14
J S Hayes, H Klöppel, R Wieling, C M Sprecher, R G Richards
After implantation of an internal fracture fixation device, blood contacts the surface, followed by protein adsorption, resulting in either soft-tissue adhesion or matrix adhesion and mineralization. Without protein adsorption and cell adhesion under the presence of micro-motion, fibrous capsule formation can occur, often surrounding a liquid filled void at the implant-tissue interface. Clinically, fibrous capsule formation is more prevalent with electropolished stainless steel (EPSS) plates than with current commercially pure titanium (cpTi) plates...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28323389/atomic-force-microscopy-in-the-production-of-a-biovital-skin-graft-based-on-human-acellular-dermal-matrix-produced-in-house-and-in-vitro-cultured-human-fibroblasts
#15
Wojciech Łabuś, Justyna Glik, Agnieszka Klama-Baryła, Diana Kitala, Małgorzata Kraut, Mariusz Maj, Mariusz Nowak, Marcelina Misiuga, Andrzej Marcinkowski, Barbara Trzebicka, Ryszard Poloczek, Marek Kawecki
The most efficient method in III° burn treatment is the use of the autologous split thickness skin grafts that were donated from undamaged body area. The main limitation of this method is lack of suitable donor sites. Tissue engineering is a useful tool to solve this problem. The goal of this study was to find the most efficient way of producing biovital skin substitute based on in house produced acellular dermal matrix ADM and in vitro cultured fibroblasts. Sixty samples of sterilized human allogeneic skin (that came from 10 different donors) were used to examine the influence of decellularizing substances on extracellular matrix and clinical usefulness of the test samples of allogeneic human dermis...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28323388/enhanced-intestinal-absorption-of-curcumin-in-caco-2-cell-monolayer-using-mucoadhesive-nanostructured-lipid-carriers
#16
Sanipon Chanburee, Waree Tiyaboonchai
This study aimed to compare the intestinal permeation of curcumin-loaded polymer coated nanostructured lipid carriers (NLCs) and uncoated NLCs using the Caco-2 cell model. The uncoated NLCs were prepared using a warm microemulsion technique, while polymer-coated NLCs were prepared with the same method but were followed by coating particle surface with polyethylene glycol (PEG) 400 or polyvinyl alcohol (PVA). After lyophilization, all formulations possessed a mean size of <400 nm with a zeta potential of ∼-30 mV and a high entrapment efficacy up to 90%...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28323384/the-effect-of-mg-ca-sr-alloy-degradation-products-on-human-mesenchymal-stem-cells
#17
Ida S Berglund, Elliott W Dirr, Vidhya Ramaswamy, Josephine B Allen, Kyle D Allen, Michele V Manuel
Biodegradable Mg alloys have the potential to replace currently used metallic medical implant devices, likely eliminating toxicity concerns and the need for secondary surgeries, while also providing a potentially stimulating environment for tissue growth. A recently developed Mg-Ca-Sr alloy possesses advantageous characteristics over other Mg alloys, having a good combination of strength and degradation behavior, while also displaying potentially osteogenic properties. To better understand the effect of alloy degradation products on cellular mechanisms, in vitro studies using human bone marrow-derived mesenchymal stem cells were conducted...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28323330/insights-on-the-evolutionary-origin-of-detarioideae-a-clade-of-ecologically-dominant-tropical-african-trees
#18
Manuel de la Estrella, Félix Forest, Jan J Wieringa, Marie Fougère-Danezan, Anne Bruneau
African tropical forests are generally considered less diverse than their Neotropical and Asian counterparts. By contrast, the Detarioideae is much more diverse in Africa than in South America and Asia. To better understand the evolution of this contrasting diversity pattern, we investigated the biogeographical and ecological origin of this subfamily, testing whether they originated in dry biomes surrounding the Tethys Seaway as currently hypothesized for many groups of Leguminosae. We constructed the largest time-calibrated phylogeny for the subfamily to date, reconstructed ancestral states for geography and biome/habitat, estimated diversification and extinction rates, and evaluated biome/habitat and geographic shifts in Detarioideae...
March 21, 2017: New Phytologist
https://www.readbyqxmd.com/read/28323289/clonality-testing-of-lymphoproliferative-disorders-in-a-large-cohort-of-primary-and-consultant-biopsies
#19
Michaela Svachova, Martin Tichy, Patrik Flodr, Jana Steigerova, Zdenek Kolar, Jan Bouchal
BACKGROUND: Lymphoproliferative disease often presents the clinician and pathologist with a diagnostic dilemma, particularly in the early course of the disease. METHODS: We used modified BIOMED-2 protocols to detect monoclonal expansions of immunoglobulin heavy chain (IgH) and T-cell receptor (TCR) genes in 957 formalin-fixed paraffin-embedded samples from 717 patients. To eliminate false-positive results, heteroduplex analysis was used after PCR reactions. The impact of different fixatives on DNA quality and performance of PCR was assessed...
March 14, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28317109/what-if-plant-functional-types-conceal-species-specific-responses-to-environment-study-on-arctic-shrub-communities
#20
Patrick Saccone, Kristiina Hoikka, Risto Virtanen
Plant functional types (PFT) are increasingly used to outline biome-scale plant-environment relationship and predict global change effects on community structure. However, the potentials and limitations of the PFT approach have to be tested as they can be less sensitive than trait-based or species-level approaches. Here, we compare the responses of deciduous-evergreen shrub PFTs and species to gradual snow-related environmental conditions by also considering effects of aboveground architectural traits and neighboring shrubs...
March 19, 2017: Ecology
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