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https://www.readbyqxmd.com/read/28346980/ecological-intensification-to-mitigate-impacts-of-conventional-intensive-land-use-on-pollinators-and-pollination
#1
REVIEW
Anikó Kovács-Hostyánszki, Anahí Espíndola, Adam J Vanbergen, Josef Settele, Claire Kremen, Lynn V Dicks
Worldwide, human appropriation of ecosystems is disrupting plant-pollinator communities and pollination function through habitat conversion and landscape homogenisation. Conversion to agriculture is destroying and degrading semi-natural ecosystems while conventional land-use intensification (e.g. industrial management of large-scale monocultures with high chemical inputs) homogenises landscape structure and quality. Together, these anthropogenic processes reduce the connectivity of populations and erode floral and nesting resources to undermine pollinator abundance and diversity, and ultimately pollination services...
March 27, 2017: Ecology Letters
https://www.readbyqxmd.com/read/28346965/point-of-care-coagulation-tests-monitoring-of-direct-oral-anticoagulants-and-their-reversal-therapy-state-of-the-art
#2
Giacomo E Iapichino, Paolo Bianchi, Marco Ranucci, Ekaterina Baryshnikova
Direct oral anticoagulants (DOACs) exert similar anticoagulant effects to vitamin K antagonists and are increasingly used worldwide. Nevertheless, an evidence-based approach to patients receiving DOACs when any unplanned urgent surgery or bleeding (either spontaneous or traumatic) occurs is still missing. In this review, we investigate the role of point-of-care coagulation tests when other, more specific tests are not available. Indeed, thromboelastography and activated clotting time can detect dabigatran-induced coagulopathy, while their accuracy is limited for apixaban and rivaroxaban, mostly in cases of low drug plasma concentrations...
March 27, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28346928/diet-and-gut-microbiota-in-health-and-disease
#3
Ting-Chin David Shen
Gut microbiota plays an important role in host health maintenance and disease pathogenesis. The development of a stable and diverse gut microbiota is essential to various host physiologic functions such as immunoregulation, pathogen prevention, energy harvest, and metabolism. At the same time, a dysbiotic gut microbiota associated with disease is altered in structure and function, and often characterized by a decrease in species richness and proliferation of pathogenic bacterial taxa. As a shared substrate between the host and the gut microbiota, diet significantly impacts the health and disease states of the host both directly and through gut microbial metabolite production...
2017: Nestlé Nutrition Institute Workshop Series
https://www.readbyqxmd.com/read/28346883/identification-and-characterization-of-a-thermally-cleaved-fragment-of-monoclonal-antibody-a-detected-by-sodium-dodecyl-sulfate-capillary-gel-electrophoresis
#4
Kei Kubota, Naoki Kobayashi, Masayuki Yabuta, Motomu Ohara, Toyohiro Naito, Takuya Kubo, Koji Otsuka
This report describes a novel, comprehensive approach to identifying a fragment peak of monoclonal antibody-A (mAb-A), detected by sodium dodecyl sulfate-capillary gel electrophoresis (SDS-cGE). The fragment migrated close to the internal standard (10kDa marker) of SDS-cGE and increased about 0.5% under a 25°C condition for 6 months. Generally, identification of fragments observed in SDS-cGE is challenging to carry out due to the difficulty of collecting analytical amounts of fractionations from the capillary...
March 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28346874/protective-effects-of-hepatocyte-specific-glycyrrhetic-derivatives-against-carbon-tetrachloride-induced-liver-damage-in-mice
#5
Yifei Yang, Lingyun Yang, Yaodan Han, Zhenwei Wu, Pan Chen, Huibin Zhang, Jinpei Zhou
Glycyrrhetic acid (GA), the main hydrolysate of glycyrrhizic acid extracted from the roots of the Chinese herb Glycyrrhiza glabra, was reported to be accumulated in hepatocytes due to the extensive distribution of GA receptors in liver. A series of hepatocyte-specific derivatives on the basis of anetholtrithione and glycyrrhizic were designed and synthesized. The potential beneficial effect was evaluated in carbon tetrachloride (CCl4)-induced liver injury model. In addition, the hepatoprotective activity of these derivatives was assessed by measuring levels of serum marker enzymes, including serum glutamate oxaloacetate transaminase (GOT), serum glutamate pyruvate transaminase (GPT), alkaline phosphatase (AKP), lactate dehydrogenase (LDH) and the ratio of GSH to GSSG...
March 20, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28346848/cardiovascular-protective-effects-and-clinical-applications-of-resveratrol
#6
Sanghyun Cho, Kyung Namkoong, Minji Shin, Jueun Park, Eunyeong Yang, Jinsoo Ihm, Vu Thi Thu, Hyoung Kyu Kim, Jin Han
Resveratrol is a naturally occurring phenol that is generated by plant species following injury or attack by bacterial and fungal pathogens. This compound was first described as the French Paradox in 1992. Later in 2003, resveratrol was reported to activate sirtuins in yeast cells. Recent experimental studies have found that resveratrol offers a variety of benefits that include both anticarcinogenic and anti-inflammatory effects in addition to the ability to reverse obesity, attenuate hyperglycemia and hyperinsulinemia, protect heart and endothelial function, and increase the life span...
March 27, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28346814/nicotinamide-riboside-a-form-of-vitamin-b3-and-nad-precursor-relieves-the-nociceptive-and-aversive-dimensions-of-paclitaxel-induced-peripheral-neuropathy-in-female-rats
#7
Marta V Hamity, Stephanie R White, Roxanne Y Walder, Mark S Schmidt, Charles Brenner, Donna L Hammond
Injury to sensory afferents may contribute to the peripheral neuropathies that develop after administration of chemotherapeutic agents. Manipulations that increase levels of nicotinamide adenine dinucleotide (NAD) can protect against neuronal injury. This study examined whether nicotinamide riboside (NR), a third form of vitamin B3 and precursor of NAD, diminishes tactile hypersensitivity and place escape-avoidance behaviors in a rodent model of paclitaxel-induced peripheral neuropathy. Female Sprague-Dawley rats received 3 intravenous injections of 6...
January 30, 2017: Pain
https://www.readbyqxmd.com/read/28346709/synthetic-%C3%AE-nitrostyrene-derivative-cyt-rx20-as-inhibitor-of-oral-cancer-cell-proliferation-and-tumor-growth-through-glutathione-suppression-and-reactive-oxygen-species-induction
#8
Yen-Yun Wang, Yuk-Kwan Chen, Ya-Ling Hsu, Wen-Chin Chiu, Chun-Hao Tsai, Stephen Chu-Sung Hu, Pei-Wen Hsieh, Shyng-Shiou F Yuan
BACKGROUND: The β-nitrostyrene family possesses anticancer properties. In this study, β-nitrostyrene derivative CYT-Rx20 (3'-hydroxy-4'-methoxy-β-methyl-β-nitrostyrene) was synthesized and investigated its anticancer activity in oral cancer. METHODS: Anticancer activity of CYT-Rx20 and the underlying mechanisms were analyzed using cell viability assay, reactive oxygen species (ROS) generation assay, fluorescence-activated cell sorter analysis, annexin V staining, comet assay, glutathione (GSH)/glutathione disulfide (GSSG) ratio, immunoblotting, soft agar assay, nude mice xenograft study, and immunohistochemistry...
March 27, 2017: Head & Neck
https://www.readbyqxmd.com/read/28346538/discrimination-of-rippled-spectrum-patterns-in-noise-a-manifestation-of-compressive-nonlinearity
#9
Olga N Milekhina, Dmitry I Nechaev, Vladimir O Klishin, Alexander Ya Supin
In normal-hearing listeners, rippled-spectrum discrimination was psychophysically investigated in both silence and with a simultaneous masker background using the following two paradigms: measuring the ripple density resolution with the phase-reversal test and measuring the ripple-shift threshold with the ripple-shift test. The 0.5-oct wide signal was centered on 2 kHz, the signal levels were 50 and 80 dB SPL, and the masker levels varied from 30 to 100 dB SPL. The baseline ripple density resolutions were 8...
2017: PloS One
https://www.readbyqxmd.com/read/28346491/a-genetic-switch-controls-the-production-of-flagella-and-toxins-in-clostridium-difficile
#10
Brandon R Anjuwon-Foster, Rita Tamayo
In the human intestinal pathogen Clostridium difficile, flagella promote adherence to intestinal epithelial cells. Flagellar gene expression also indirectly impacts production of the glucosylating toxins, which are essential to diarrheal disease development. Thus, factors that regulate the expression of the flgB operon will likely impact toxin production in addition to flagellar motility. Here, we report the identification a "flagellar switch" that controls the phase variable production of flagella and glucosylating toxins...
March 27, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28346464/sympathetic-nervous-system-activity-and-anti-lipolytic-response-to-iv-glucose-load-in-subcutaneous-adipose-tissue-of-obese-and-obese-type-2-diabetic-subjects
#11
Uwe Schumann, Christopher P Jenkinson, Andreas Alt, Martina Zügel, Jürgen M Steinacker, Marion Flechtner-Mors
The study aim was to investigate the effect of endogenous insulin release on lipolysis in subcutaneous adipose tissue after adrenergic stimulation in obese subjects diagnosed with type 2 diabetes (T2D). In 14 obese female T2D subjects, or 14 obese non-T2D controls, glycerol concentration was measured in response to the α1,2,ß-agonist norepinephrine, the α1-agonist norfenefrine and the ß2-agonist terbutaline (each 10-4 M), using the microdialysis technique. After 60 minutes of stimulation, an intravenous glucose load (0...
2017: PloS One
https://www.readbyqxmd.com/read/28346433/a-cytosolic-ezh1-isoform-modulates-a-prc2-ezh1-epigenetic-adaptive-response-in-postmitotic-cells
#12
Beatrice Bodega, Federica Marasca, Valeria Ranzani, Alessandro Cherubini, Francesco Della Valle, Maria Victoria Neguembor, Michel Wassef, Alessio Zippo, Chiara Lanzuolo, Massimiliano Pagani, Valerio Orlando
The evolution of chromatin-based epigenetic cell memory may be driven not only by the necessity for cells to stably maintain transcription programs, but also by the need to recognize signals and allow plastic responses to environmental stimuli. The mechanistic role of the epigenome in adult postmitotic tissues, however, remains largely unknown. In vertebrates, two variants of the Polycomb repressive complex (PRC2-Ezh2 and PRC2-Ezh1) control gene silencing via methylation of histone H3 on Lys27 (H3K27me). Here we describe a reversible mechanism that involves a novel isoform of Ezh1 (Ezh1β)...
March 27, 2017: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/28346409/the-metabolic-er-stress-sensor-ire1%C3%AE-suppresses-alternative-activation-of-macrophages-and-impairs-energy-expenditure-in-obesity
#13
Bo Shan, Xiaoxia Wang, Ying Wu, Chi Xu, Zhixiong Xia, Jianli Dai, Mengle Shao, Feng Zhao, Shengqi He, Liu Yang, Mingliang Zhang, Fajun Nan, Jia Li, Jianmiao Liu, Jianfeng Liu, Weiping Jia, Yifu Qiu, Baoliang Song, Jing-Dong J Han, Liangyou Rui, Sheng-Zhong Duan, Yong Liu
Obesity is associated with metabolic inflammation and endoplasmic reticulum (ER) stress, both of which promote metabolic disease progression. Adipose tissue macrophages (ATMs) are key players orchestrating metabolic inflammation, and ER stress enhances macrophage activation. However, whether ER stress pathways underlie ATM regulation of energy homeostasis remains unclear. Here, we identified inositol-requiring enzyme 1α (IRE1α) as a critical switch governing M1-M2 macrophage polarization and energy balance...
March 27, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28346406/diabetes-reversal-by-inhibition-of-the-low-molecular-weight-tyrosine-phosphatase
#14
Stephanie M Stanford, Alexander E Aleshin, Vida Zhang, Robert J Ardecky, Michael P Hedrick, Jiwen Zou, Santhi R Ganji, Matthew R Bliss, Fusayo Yamamoto, Andrey A Bobkov, Janna Kiselar, Yingge Liu, Gregory W Cadwell, Shilpi Khare, Jinghua Yu, Antonio Barquilla, Thomas D Y Chung, Tomas Mustelin, Simon Schenk, Laurie A Bankston, Robert C Liddington, Anthony B Pinkerton, Nunzio Bottini
Obesity-associated insulin resistance plays a central role in type 2 diabetes. As such, tyrosine phosphatases that dephosphorylate the insulin receptor (IR) are potential therapeutic targets. The low-molecular-weight protein tyrosine phosphatase (LMPTP) is a proposed IR phosphatase, yet its role in insulin signaling in vivo has not been defined. Here we show that global and liver-specific LMPTP deletion protects mice from high-fat diet-induced diabetes without affecting body weight. To examine the role of the catalytic activity of LMPTP, we developed a small-molecule inhibitor with a novel uncompetitive mechanism, a unique binding site at the opening of the catalytic pocket, and an exquisite selectivity over other phosphatases...
March 27, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28346384/intensive-sleep-re-training-from-bench-to-bedside
#15
REVIEW
Leon Lack, Hannah Scott, Gorica Micic, Nicole Lovato
Intensive sleep re-training is a promising new therapy for chronic insomnia. Therapy is completed over a 24-h period during a state of sleep deprivation. Improvements of sleep and daytime impairments are comparable to the use of stimulus control therapy but with the advantage of a rapid reversal of the insomnia. The initial studies have been laboratory based and not readily accessible to the patient population. However, new smart phone technology, using a behavioral response to external stimuli as a measure of sleep/wake state instead of EEG determination of sleep, has made this new therapy readily available...
March 27, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28346349/electrodes-for-semiconductor-gas-sensors
#16
REVIEW
Sung Pil Lee
The electrodes of semiconductor gas sensors are important in characterizing sensors based on their sensitivity, selectivity, reversibility, response time, and long-term stability. The types and materials of electrodes used for semiconductor gas sensors are analyzed. In addition, the effect of interfacial zones and surface states of electrode-semiconductor interfaces on their characteristics is studied. This study describes that the gas interaction mechanism of the electrode-semiconductor interfaces should take into account the interfacial zone, surface states, image force, and tunneling effect...
March 25, 2017: Sensors
https://www.readbyqxmd.com/read/28346331/reverse-attenuation-gradient-sign
#17
Harold Goerne, Sachin S Saboo, Prabhakar Rajiah
No abstract text is available yet for this article.
March 24, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28346321/growth-arrest-and-dna-damage-inducible-protein-45%C3%AE-mediated-dna-demethylation-of-voltage-dependent-t-type-calcium-channel-3-2-subunit-enhances-neuropathic-allodynia-after-nerve-injury-in-rats
#18
Cheng-Yuan Lai, Ming-Chun Hsieh, Yu-Cheng Ho, An-Sheng Lee, Hsueh-Hsiao Wang, Jen-Kun Cheng, Yat-Pang Chau, Hsien-Yu Peng
BACKGROUND: Growth arrest and DNA-damage-inducible protein 45β reactivates methylation-silenced neural plasticity-associated genes through DNA demethylation. However, growth arrest and DNA-damage-inducible protein 45β-dependent demethylation contributes to neuropathic allodynia-associated spinal plasticity remains unclear. METHODS: Adult male Sprague-Dawley rats (654 out of 659) received a spinal nerve ligation or a sham operation with or without intrathecal application of one of the following: growth arrest and DNA-damage-inducible protein 45β messenger RNA-targeted small interfering RNA, lentiviral vector expressing growth arrest and DNA-damage-inducible protein 45β, Ro 25-6981 (an NR2B-bearing N-methyl-D-aspartate receptor antagonist), or KN-93 (a calmodulin-dependent protein kinase II antagonist) were used for behavioral measurements, Western blotting, immunofluorescence, dot blots, detection of unmodified cytosine enrichment at cytosine-phosphate-guanine site, chromatin immunoprecipitation quantitative polymerase chain reaction analysis, and slice recordings...
March 27, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28346095/identification-by-high-throughput-screening-of-pseudomonas-acyl-coenzyme-a-synthetase-inhibitors
#19
Lorenzo Turcano, Daniela Visaggio, Emanuela Frangipani, Antonino Missineo, Matteo Andreini, Sergio Altamura, Paolo Visca, Alberto Bresciani
Pseudomonas infections are common among hospitalized, immunocompromised, and chronic lung disease patients. These infections are recalcitrant to common antibacterial therapies due to inherent antibiotic resistance. To meet the need of new anti- Pseudomonas drugs, a sensitive, homogenous, and robust assay was developed with the aim of identifying inhibitors of acyl-coenzyme A synthetases (ACSs) from Pseudomonas. Given the importance of fatty acids for in vivo nutrition of Pseudomonas, such inhibitors might have the potential to reduce the bacterial fitness during infection...
January 1, 2017: SLAS Discov
https://www.readbyqxmd.com/read/28345998/pharmacokinetics-of-a-single-dose-of-voriconazole-administered-orally-with-and-without-food-to-red-tailed-hawks-buteo-jamaicensus
#20
Ruth A Parsley, Lisa A Tell, Ronette Gehring
OBJECTIVE To determine the pharmacokinetics of voriconazole administered PO with or without food to red-tailed hawks (Buteo jamaicensus) and whether any observed variability could be explained by measured covariates to inform dose adjustments. ANIMALS 7 adult red-tailed hawks. PROCEDURES In a crossover study design, hawks were randomly assigned to first receive voriconazole (15 mg/kg, PO) injected into a dead mouse (n = 3; fed birds) or without food (4; unfed birds). Sixteen days later, treatments were reversed...
April 2017: American Journal of Veterinary Research
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