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https://www.readbyqxmd.com/read/28918511/the-role-of-major-virulence-factors-of-aiec-involved-in-inflammatory-bowl-disease-a-mini-review
#1
REVIEW
Yuqian Yang, Yuexia Liao, Yan Ma, Weijuan Gong, Guoqiang Zhu
Adherent-invasive Escherichia coli (AIEC) has recently attracted more attention because it is closely related to the pathogenicity of human inflammatory bowel disease (IBD). AIEC possesses a multitude of virulence factors. Considering these virulence factors belonging to various virulence groups, including adhesins, invasins, toxins, protectins, and siderophore-mediated iron acquisition, this review summarizes the current knowledge of how the major virulence factors assisting in AIEC survive in, adhere to, and invade host cells...
September 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28918495/the-stingless-bee-melipona-solani-deposits-a-signature-mixture-and-methyl-oleate-to-mark-valuable-food-sources
#2
David Alavez-Rosas, Edi A Malo, Miguel A Guzmán, Daniel Sánchez-Guillén, Rogel Villanueva-Gutiérrez, Leopoldo Cruz-López
Stingless bees foraging for food improve recruitment by depositing chemical cues on valuable food sites or pheromone marks on vegetation. Using gas chromatography/mass spectrometry and bioassays, we showed that Melipona solani foragers leave a mixture composed mostly of long chain hydrocarbons from their abdominal cuticle plus methyl oleate from the labial gland as a scent mark on rich food sites. The composition of hydrocarbons was highly variable among individuals and varied in proportions, depending on the body part...
September 16, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28918375/synthesis-of-fluorescent-dendrimers-with-aggregation-induced-emission-features-through-a-one-pot-multi-component-reaction-and-their-utilization-for-biological-imaging
#3
Weihua Luo, Ruming Jiang, Meiying Liu, Qing Wan, Jianwen Tian, Yuanqing Wen, Qian-Yong Cao, Junfeng Hui, Xiaoyong Zhang, Yen Wei
Hyperbranched polymers have attracted wide research attention owing to their unique topological structure, physicochemical properties and great potential for applications such asadditives, drug delivery, catalysts and nanotechnology. Among these, the polyamidoamine(PAMAM) dendrimers are some of the most important dendrimers. However, the synthesis and biomedical applications of fluorescent PAMAM dendrimers have received only limited attention. In this work, we present a rather effective and convenient approach for synthesis of fluorescent PAMAM dendrimers with aggregation-induced emission (AIE) properties through a one-pot catalyst-free Mannich reaction under rather mild experimental conditions (e...
September 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28918369/the-development-of-biodiversity-conservation-measures-in-china-s-hydro-projects-a-review
#4
REVIEW
Ruiqiao Bai, Xuehua Liu, Xiaofei Liu, Lanmei Liu, Jianping Wang, Sihui Liao, Annah Zhu, Zhouyuan Li
The hydropower capacity of China ranks first in the world and accounts for approximately 20% of the total energy production in the country. While hydropower has substantially contributed to meeting China's renewable energy targets and providing clean energy to rural areas, the development of hydropower in China has been met with significant controversy. Ecologically, hydro projects alter the landscape, with potential impacts to the country's aquatic biodiversity. Over the past four decades in China, various mainstream opinions and misunderstandings have been presented concerning how to alleviate the negative impacts of hydro projects on aquatic ecosystems...
September 14, 2017: Environment International
https://www.readbyqxmd.com/read/28918338/a-short-term-swimming-speed-alteration-test-with-nauplii-of-artemia-franciscana
#5
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/28918064/synthesis-and-in-vitro-study-of-benzofuran-hydrazone-derivatives-as-novel-alpha-amylase-inhibitor
#6
Muhammad Taha, Syed Adnan Ali Shah, Syahrul Imran, Muhammad Afifi, Sridevi Chigurupati, Manikandan Selvaraj, Fazal Rahim, Hayat Ullah, Khalid Zaman, Shantini Vijayabalan
The α-amylase acts as attractive target to treat type-2 diabetes mellitus. Therefore in discovering a small molecule as α-amylase inhibitor, we have synthesized benzofuran carbohydrazide analogs (1-25), characterized through different spectroscopic techniques such as (1)HNMR and EI-MS. All screened analog shows good α-amylase inhibitory potentials with IC50 value ranging between 1.078±0.19 and 2.926±0.05µM when compared with acarbose having IC50=0.62±0.22µM. Only nine analogs among the series such as analogs 3, 5, 7, 8, 10, 12, 21, 23 and 24 exhibit good inhibitory potential with IC50 values 1...
September 7, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28917920/one-step-hydrothermal-synthesis-of-fluorescent-nanocrystalline-cellulose-carbon-dot-hydrogels
#7
Wei Li, Sichun Wang, Ying Li, Chunhui Ma, Zhanhua Huang, Chunsheng Wang, Jian Li, Zhijun Chen, Shouxin Liu
Fluorescent nanocrystalline cellulose/carbon dots (NCC/CDs) hydrogels were successfully prepared by a facile one-step green hydrothermal carbonization process. The properties of NCC/CDs hydrogels prepared at different temperatures were investigated by fluorescence spectroscopy, transmission electron microscopy, nuclear magnetic resonance spectroscopy, X-ray diffraction, and thermogravimetric analysis. NCC/CDs hydrogels with high crystallinity, high thermal stability, and excellent fluorescence properties can be obtained by controlling the hydrothermal treatment temperature...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917917/characterization-of-structural-cell-wall-polysaccharides-in-cattail-typha-latifolia-evaluation-as-potential-biofuel-feedstock
#8
Diego Rebaque, Romina Martínez-Rubio, Silvia Fornalé, Penélope García-Angulo, Ana Alonso-Simón, Jesús M Álvarez, David Caparros-Ruiz, José L Acebes, Antonio Encina
Second generation bioethanol produced from lignocellulosic biomass is attracting attention as an alternative energy source. In this study, a detailed knowledge of the composition and structure of common cattail (Typha latifolia L.) cell wall polysaccharides, obtained from stem or leaves, has been conducted using a wide set of techniques to evaluate this species as a potential bioethanol feedstock. Our results showed that common cattail cellulose content was high for plants in the order Poales and was accompanied by a small amount of cross-linked polysaccharides...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917818/assessment-of-shipping-emissions-on-four-ports-of-portugal
#9
R A O Nunes, M C M Alvim-Ferraz, F G Martins, S I V Sousa
In the last few years, ship emissions have attracted growing attention in the scientific community. The main reason is the constant increase of marine emissions over the last twenty years due to the intensification of port traffic. Thus, this study aimed to evaluate ship emissions (PM10, PM2.5, NOx, SO2, CO, CO2, N2O CH4, NMVOC, and HC) through the activity-based methodology in four of the main ports of Portugal (Leixões, Setúbal, Sines and Viana do Castelo) during 2013 and 2014. The analysis was performed according to ship types (bulk carrier, container, general cargo, passenger, Ro-Ro cargo, tanker and others) and operational modes (manoeuvring, hotelling and during cruising)...
September 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28917803/atp-mediated-rolling-circle-amplification-and-opening-dna-gate-for-drug-delivery-to-cell
#10
Yujie Wang, Xinxin Shang, Jia Liu, Yingshu Guo
Here, we have developed a facile fluorometric system for the detection of adenosine triphosphate (ATP) by a rolling circle amplification (RCA) based on proximity ligation mediated amplification, and simultaneously achieved the release of the anticancer drug doxorubicin (DOX) through the mesoporous silicon system. Once the ATP molecule is present, the linker DNA will be released from the graphene oxide (GO) surface and hybridized to the template DNA of the GO surface joining with ligation enzyme. RCA reaction is followed by the addition of the phi29 DNA polymerase...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917624/small-heat-shock-protein-27-an-effective-adjuvant-for-enhancement-of-hiv-1-nef-antigen-specific-immunity
#11
Alireza Milani, Azam Bolhassani, Sepideh Shahbazi, Fatemeh Motevalli, Seyed Mehdi Sadat, Sepehr Soleymani
Novel vaccine modalities have been designed to improve the efficiency of vaccines against HIV infections. In this way, the HIV-1 Nef protein has been known as an attractive antigenic candidate in therapeutic vaccine development. Moreover, the endogenous adjuvants such as heat shock proteins (HSPs) and high mobility group box 1 protein (HMGB1) have been suggested effectively to induce antigen-specific humoral and cellular immune responses. In this study, different Nef DNA and protein constructs were produced in eukaryotic and prokaryotic expression systems, and their immunostimulatory properties were evaluated using small heat shock protein 27 (Hsp27) and the HMGB1-derived peptide (Hp91) in a mouse model...
September 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28917531/hollow-microneedle-mediated-intradermal-delivery-of-model-vaccine-antigen-loaded-plga-nanoparticles-elicits-protective-t-cell-mediated-immunity-to-an-intracellular-bacterium
#12
Anne Marit de Groot, Guangsheng Du, Juha Mönkäre, Anouk C M Platteel, Femke Broere, Joke A Bouwstra, Alice J A M Sijts
The skin is an attractive organ for immunization due to the presence of a large number of epidermal and dermal antigen-presenting cells. Hollow microneedles allow for precise and non-invasive intradermal delivery of vaccines. In this study, ovalbumin (OVA)-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles with and without TLR3 agonist poly(I:C) were prepared and administered intradermally by hollow microneedles. The capacity of the PLGA nanoparticles to induce a cytotoxic T cell response, contributing to protection against intracellular pathogens, was examined...
September 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28917306/evaluation-of-surface-antigen-tf1-17-in-feline-tritrichomonas-foetus-isolates
#13
E N Gould, L B Corbeil, S A Kania, M K Tolbert
Tritrichomonas foetus (T. foetus) is a flagellated protozoa that infects the distal ileum and proximal colon of domestic cats, as well as the urogenital tract of cattle. Feline trichomonosis is recognized as a prevalent cause of chronic diarrhea in cats worldwide. The suspected route of transmission is fecal-oral, with cats in densely crowded environments at highest risk for infection. Thus, the recommended strategy for minimizing spread of infection is to identify and isolate T. foetus-positive cats from the general population...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28916993/periostin-in-the-pathogenesis-of-skin-diseases
#14
REVIEW
Hiroyuki Murota, Yang Lingli, Ichiro Katayama
Skin is an organ that is susceptible to damage by external injury, chronic inflammation, and autoimmunity. Tissue damage causes alterations in both the configuration and type of cells in lesional skin. This phenomenon, called tissue remodeling, is a universal biological response elicited by programmed cell death, inflammation, immune disorders, and tumorigenic, tumor proliferative, and cytoreductive activity. In this process, changes in the components of the extracellular matrix are required to provide an environment that facilitates tissue remodeling...
September 15, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28916901/pulmonic-valve-disease-review-of-pathology-and-current-treatment-options
#15
REVIEW
Mouhammad Fathallah, Richard A Krasuski
PURPOSE OF REVIEW: Our review is intended to provide readers with an overview of disease processes involving the pulmonic valve, highlighting recent outcome studies and guideline-based recommendations; with focus on the two most common interventions for treating pulmonic valve disease, balloon pulmonary valvuloplasty and pulmonic valve replacement. RECENT FINDINGS: The main long-term sequelae of balloon pulmonary valvuloplasty, the gold standard treatment for pulmonic stenosis, remain pulmonic regurgitation and valvular restenosis...
September 16, 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28916504/going-skin-deep-a-direct-comparison-of-penetration-potential-of-lipid-based-nanovesicles-on-the-isolated-perfused-human-skin-flap-model
#16
Selenia Ternullo, Louis de Weerd, Ann Mari Holsæter, Gøril Eide Flaten, Nataša Škalko-Basnet
Phospholipid-based nanocarriers are attractive drug carriers for improved local skin therapy. In the present study, the recently developed isolated perfused human skin flap (IPHSF) model was used to directly compare the skin penetration enhancing potential of the three commonly used nanocarriers, namely conventional liposomes (CLs), deformable liposomes (DLs) and solid lipid nanoparticles (SLNs). Two fluorescent markers, calcein (hydrophilic) or rhodamine (lipophilic), were incorporated individually in the three nanosystems...
September 12, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28916381/perspectives-on-the-production-structural-characteristics-and-potential-applications-of-bioplastics-derived-from-polyhydroxyalkanoates
#17
REVIEW
Priscilla B S Albuquerque, Carolina B Malafaia
Since the last two decades, the use of synthetic materials has increased and become more frequent in this capitalist system. Polymers used as raw materials are usually disposed very rapidly and considered serious damages when they return to the environment. Because of this behaviour, there was an increasing in the global awareness by minimizing the waste generated, in addition to the scientific community concern for technological alternatives to solve this problem. Alternatively, biodegradable polymers are attracting special interest due to their inherent properties, which are similar to the ones of the conventional plastics...
September 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28916340/identification-of-potent-nonabsorbable-agonists-of-the-calcium-sensing-receptor-for-gi-specific-administration
#18
Steven M Sparks, Paul K Spearing, Caroline J Diaz, David J Cowan, Channa Jayawickreme, Grace Chen, Thomas J Rimele, Claudia Generaux, Lindsey T Harston, Shane G Roller
Modulation of gastrointestinal nutrient sensing pathways provides a promising a new approach for the treatment of metabolic diseases including diabetes and obesity. The calcium-sensing receptor has been identified as a key receptor involved in mineral and amino acid nutrient sensing and thus is an attractive target for modulation in the intestine. Herein we describe the optimization of gastrointestinally restricted calcium-sensing receptor agonists starting from a 3-aminopyrrolidine-containing template leading to the identification of GI-restricted agonist 19 (GSK3004774)...
September 7, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28916303/high-throughput-flow-cytometry-for-drug-discovery-principles-applications-and-case-studies
#19
REVIEW
Mei Ding, Karin Kaspersson, David Murray, Catherine Bardelle
Flow cytometry is a technology providing multiparametric analysis of single cells or other suspension particles. High-throughput (HT) flow cytometry has become an attractive screening platform for drug discovery. In this review, we highlight the recent HT flow cytometry applications, and then focus on HT flow cytometry deployment at AstraZeneca (AZ). Practical considerations for successful HT flow cytometry assay development and screening are provided based on experience from four project case studies at AZ...
September 12, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28916284/stereotactic-body-radiotherapy-versus-low-dose-rate-brachytherapy-for-localised-prostate-cancer-a-cost-utility-analysis
#20
J Helou, S Torres, H B Musunuru, J Raphael, P Cheung, D Vesprini, H T Chung, L D'Alimonte, M Krahn, G Morton, A Loblaw
AIMS: To conduct a cost-utility analysis comparing stereotactic body radiotherapy (SBRT) with low dose rate brachytherapy (LDR-BT) for localised prostate cancer (PCa). MATERIALS AND METHODS: A decision-analytic Markov model was developed from the healthcare payer perspective to simulate the history of a 66-year-old man with low-risk PCa. The model followed patients yearly over their remaining lifetimes. Health states included 'recurrence-free', 'biochemical recurrence' (BR), 'metastatic' and 'death'...
September 12, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
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