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Loiy E Ahmed Hassan, Saad S Dahham, Sultan Ayesh Mohammed Saghir, Abdelhafeez M A Mohammed, Nagla M Eltayeb, Amin Malik Shah Abdul Majid, Aman Shah Abdul Majid
BACKGROUND: Balanite aegyptiaca (L.) Delile, is a plant with extensive medicinal properties. Its stem bark is traditionally known for its spasmolytic and antiepileptic properties and used to treat yellow fever, jaundice and syphilis. Angiogenesis (sprouting of new blood vessels) is crucial for tumor growth and metastasis. The goal of this study is investigate the antiangiogenic, cytotoxicity and antioxidant activity as well as antitumor in vivo properties of B. aegyptiaca stem bark extracts...
October 19, 2016: BMC Complementary and Alternative Medicine
Chengchao Chu, Shengxiang Ge, Jing Zhang, Huirong Lin, Gang Liu, Xiaoyuan Chen
We present a simple colorimetric assay for EV71 virus detection based on the aggregation of 4-mercaptobenzoic acid (4-MBA) and melamine (MA) modified silver nanoparticles (4-MBA-MA-AgNPs) in the presence of Mn(2+). The EV71-Ab1 was incubated on a 96-well plate and the EV71-Ab2 was labeled on the surface of three-dimensional nanoflower-like MnO2-PEG (3D-MnO2-PEG). After layer-by-layer immunoreactions, the EV71 virus and the corresponding 3D-MnO2-PEG-Ab2 were captured on the plate. With the addition of Vitamin C (Vc), Mn(2+) was released from the 3D-MnO2-PEG and then the aggregation of the 4-MBA-MA-AgNPs was induced, allowing a naked-eye detection limit of EV71 virus to be as low as 5 × 10(4) particles per mL, which is about three orders of magnitude lower than the conventional enzyme-linked immunosorbent assay (ELISA)...
September 15, 2016: Nanoscale
Tanja Lahtinen, Eero Hulkko, Karolina Sokołowska, Tiia-Riikka Tero, Ville Saarnio, Johan Lindgren, Mika Pettersson, Hannu Häkkinen, Lauri Lehtovaara
We present the synthesis, separation, and characterization of covalently-bound multimers of para-mercaptobenzoic acid (p-MBA) protected gold nanoclusters. The multimers were synthesized by performing a ligand-exchange reaction of a pre-characterized Au102(p-MBA)44 nanocluster with biphenyl-4,4'-dithiol (BPDT). The reaction products were separated using gel electrophoresis yielding several distinct bands. The bands were analyzed by transmission electron microscopy (TEM) revealing monomer, dimer, and trimer fractions of the nanocluster...
September 21, 2016: Nanoscale
Alfredo Tlahuice-Flores
The effect of chiral and achiral ligands protecting the inner Au9 core of the Au18(SR)14 cluster is studied based on density functional theory (DFT) and its corrected long-range interaction (DFT-D) approach. It was found that the electronic properties (energy levels) depend on the specific ligands, which induce distinct distortions on the Au-S framework. However, the substitution of S-c-C6H11 as SCH3 ligands may be considered to be correct given the obtained resemblance to the displayed bonding, optical and chiroptical properties...
October 12, 2016: Physical Chemistry Chemical Physics: PCCP
Wenna Liu, Tao Yang, Junhong Chen, Yingzhi Chen, Xinmei Hou, Xuemei Han, Kuo-Chih Chou
Enhanced reproducible Raman signals of the 4-MBA molecule were observed on the surface of semiconducting SiC nanowhiskers (SiCNWs) by surface-enhanced Raman spectroscopy (SERS). The SERS enhancement was further tuned and boosted by doping with B. Theoretical calculations were performed to unravel the mechanism of the SERS enhancement and it was found that the SERS effect was strongly associated with the energy level structure between the substrate and analyte. Appropriate energy level matching facilitated the charge transfer process during laser illumination, enhancing the SERS signal...
October 5, 2016: Physical Chemistry Chemical Physics: PCCP
Christopher L Bowlus, James T Kenney, Gary Rice, Robert Navarro
BACKGROUND: Chronic liver disease and cirrhosis are a leading cause of morbidity and mortality in the United States. Primary biliary cholangitis (PBC), previously known as primary biliary cirrhosis and which has been designated an orphan condition, is a chronic autoimmune disease resulting in the destruction of the small bile ducts in the liver. Without effective treatment, disease progression frequently leads to liver failure and death. Until May 2016, the only FDA-approved treatment for PBC was ursodiol (UDCA), an oral hydrophilic bile acid, which can slow progression of liver damage due to PBC...
October 2016: Journal of Managed Care & Specialty Pharmacy
Haibin Li, Chusheng Liu, Qiqin Wang, Haibo Zhou, Zhengjin Jiang
In order to investigate the effect of charged groups present in hydrophilic monolithic stationary phases on their chromatographic properties, three charged hydrophilic monomers, i.e. N,N-dimethyl-N-acryloyloxyethyl-N-(3-sulfopropyl)ammonium betaine (SPDA), [2-(acryloyloxy)ethyl]trimethylammonium chloride (AETA), and 3-sulfopropyl acrylate potassium salt (SPA) were co-polymerized with the crosslinker N,N'-methylenebisacrylamide (MBA), respectively. The physicochemical properties of the three resulting charged hydrophilic monolithic columns were evaluated using scanning electron microscopy, ζ-potential analysis and micro-HPLC...
October 21, 2016: Journal of Chromatography. A
Yu-Ting Zuo, Yu Hu, Wei-Wei Lu, Jing-Jing Cao, Fan Wang, Xue Han, Wen-Qing Lu, Ai-Lin Liu
Scarce toxicological data are available for 2,6-dichloro-1,4-benzoquinone (DCBQ), an emerging water disinfection by-product (DBP) that is of potential public health concern. This study investigated the effects of DCBQ on the lethality, respiration rate, and DNA damage in the Caenorhabditis elegans nematode. Meanwhile, the toxic effects of five regulated DBPs, dichloroacetic acid (DCA), trichloroacetic acid (TCA), monobromoacetic acid (MBA), dibromoacetic acid (DBA), and N-nitrosodimethylamine (NDMA), have also been evaluated...
September 17, 2016: Journal of Hazardous Materials
Bhavna Sikarwar, Virendra V Singh, Pushpendra K Sharma, Ashu Kumar, Duraipandian Thavaselvam, Mannan Boopathi, Beer Singh, Yogesh K Jaiswal
Surface plasmon resonance (SPR) immunosensor using 4-mercaptobenzoic acid (4-MBA) modified gold (4-MBA/Au) SPR chip was developed first time for the detection of Brucella melitensis (B. melitensis) based on the screening of its complementary DNA target by using two different newly designed DNA probes of IS711 gene. Herein, interaction between DNA probes and target molecule are also investigated and result revealed that the interaction is spontaneous. The kinetics and thermodynamic results derived from the experimental data showed that the interaction between complementary DNA targets and probe 1 is more effective than that of probe 2...
September 18, 2016: Biosensors & Bioelectronics
Shogo Nakano, Kazuyuki Yasukawa, Takaki Tokiwa, Takeshi Ishikawa, Erika Ishitsubo, Naoya Matsuo, Sohei Ito, Hiroaki Tokiwa, Yasuhisa Asano
Elucidation of the molecular mechanism of amine oxidases (AOx) will help to extend their reactivity by rational design and their application to deracemization of various amine compounds. To date, several studies have been performed on S-selective AOx, but relatively few have focused on R-selective AOx. In this study, we sought to elucidate the mechanism of pkAOx, an R-selective AOx that we designed by introducing the Y228L and R283G mutations into d-amino acid oxidase from pig kidney. Four crystal structures of the substrate-bound protein and first-principles calculations based on the correlated fragment molecular orbital (FMO) indicated that two aromatic residues, Tyr224 and Phe242, form stable π-π stacking interaction with substrates...
October 10, 2016: Journal of Physical Chemistry. B
Hugo Kavunga Membo, Aaron Mweene, Serge Alain Sadeuh-Mba, Justin Masumu, Riziki Yogolelo, Norbert Ngendabanyikwa, Eddy Sokolua, Fred Sagamiko, Edgar Simulundu, Steve Ahuka, Jean Jacques Muyembe
INTRODUCTION: The last wild poliovirus (WPV) case in Africa was reported in July 2014, thus underscoring the tremendous progress towards polio eradication worldwide. This study aimed to analyze the results of a seven-year surveillance of Acute Flaccid Paralysis (AFP) in the Democratic Republic of Congo (DRC) and to identify potential gaps that need to be addressed. METHODS: Epidemiological and virological data obtained from AFP surveillance among AFP cases less than 15 years from January 2008 to December 2014 in DRC were retrospectively considered and analyzed in this study...
2016: Pan African Medical Journal
Sachin H Jain, Elaine B Goodman, Brian W Powers, Joel T Katz
No abstract text is available yet for this article.
September 2016: Healthcare
Janice L Clarke, Alexis Skoufalos, Alice Medalia, A Mark Fendrick
Improving Health Outcomes for Patients with Depression: A Population Health Imperative. Report on an Expert Panel Meeting Janice L. Clarke, RN, Alexis Skoufalos, EdD, Alice Medalia, PhD, and A. Mark Fendrick, MD Editorial: A Call to Action : David B. Nash, MD, MBA   S-2 OVERVIEW: Depression and the Population Health Imperative    S-3 Promoting Awareness of the Issues and Opportunities for Improvement    S-5 Cognitive Dysfunction in Affective Disorders    S-5 Critical Role of Employers in Improving Health Outcomes for Employees with Depression    S-6 Closing the Behavioral Health Professional and Process Gaps    S-6 Achieving the Triple Aim for Patients with Depressive Disorders    S-6 Improving the Experience of Care for Patients with Depression    S-6 Improving Quality of Care and Health Outcomes for Patients with Depression    S-7 Changing the Cost of Care Discussion from How Much to How Well    S-8 Panel Insights and Recommendations    S-9 Conclusion    S-10...
September 2016: Population Health Management
Xian-Ming Qi, Ge-Gu Chen, Xiao-Dong Gong, Gen-Que Fu, Ya-Shuai Niu, Jing Bian, Feng Peng, Run-Cang Sun
Hemicelluloses are widely used to prepare gel materials because of their renewability, biodegradability, and biocompatibility. Here, molecular chain extension of hemicelluloses was obtained in a two-step process. Composite hydrogels were prepared via free radical graft copolymerization of crosslinked quaternized hemicelluloses (CQH) and acrylic acid (AA) in the presence of crosslinking agent N,N'-methylenebisacrylamide (MBA). This chain extension strategy significantly improved the mechanical performance of the resulting hydrogels...
2016: Scientific Reports
Gang Yu, Bo Xia, Zhu Wang, Baisha Huang, Ying Zhang, Chun Hong, Ning Shang, Jing Tang
OBJECTIVE: To summarize our diagnosis and management experience of congenital bronchial atresia (CBA). METHODS: A retrospective review was conducted, clinical data were collected of all patients with CBA. RESULTS: Among the nine patients (5 males and 4 females), six cases with right side and three cases with left cases, including one patient with mainstem bronchial atresia (MBA), two cases with lobar bronchial atresia (LBA), six cases with segmental bronchial atresia (SBA)...
October 3, 2016: Journal of Maternal-fetal & Neonatal Medicine
Cristal Reyna, Felix Mba Medie, Matthew M Champion, Patricia A Champion
Mass spectrometry (MS) for the detection of proteins is an indispensable tool for evaluating the biological processes of the proteome. Proteomics frequently requires proteolysis of proteins into peptide fragments. Proteins can be refractory to ideal proteolysis at the sequence level rendering them difficult to analyze by routine proteomics methods. EsxA (ESAT-6, Early Secreted Antigen, 6kDa) is a major virulence determinant of Mycobacterium tuberculosis, the cause of human tuberculosis. EsxA is routinely used to evaluate mycobacterial virulence in the laboratory and as a biomarker for tuberculosis in humans...
2016: Scientific Reports
Gabriela Fagundez, Hugo Perez-Freixo, Juan Eyene, Juan Carlos Momo, Lucia Biyé, Teodoro Esono, Marcial Ondó Mba Ayecab, Agustín Benito, Pilar Aparicio, Zaida Herrador
Equatorial Guinea has one of the highest burden of tuberculosis (TB) in Africa. Incomplete adherence to TB treatment has been identified as one of the most serious remaining problem in tuberculosis control. The following study is aimed at determining the adherence to anti-tuberculosis treatment in Equatorial Guinea and its determinants, as well as at assessing the knowledge of the people about the disease. In this cross-sectional study, participants were recruited by non-probabilistic consecutive sampling amongst patients who attended the reference units for TB in Bata and Malabo between March and July 2015...
2016: PloS One
Maël Bessaud, Serge A Sadeuh-Mba, Marie-Line Joffret, Richter Razafindratsimandresy, Patsy Polston, Romain Volle, Mala Rakoto-Andrianarivelo, Bruno Blondel, Richard Njouom, Francis Delpeyroux
Enteroviruses are among the most common viruses infecting humans and can cause diverse clinical syndromes ranging from minor febrile illness to severe and potentially fatal diseases. Enterovirus species C (EV-C) consists of more than 20 types, among which the three serotypes of polioviruses, the etiological agents of poliomyelitis, are included. Biodiversity and evolution of EV-C genomes are shaped by frequent recombination events. Therefore, identification and characterization of circulating EV-C strains require the sequencing of different genomic regions...
2016: Frontiers in Microbiology
Kinga Meller, Paweł Pomastowski, Michał Szumski, Bogusław Buszewski
In the present work the preparation of capillary-based microreactors with immobilized trypsin was investigated. The monolithic support was synthesized from 2-hydroxyethyl methacrylate (HEMA) as a functional monomer and N,N'-methylenebis(acrylamide) (MBA) as a hydrophilic crosslinker. Two monomers contents in the polymerization mixture (27% and 35%) at the ratio of HEMA:MBA=3:2 were tested. The results indicated that the heated mixture of the above monomers and the porogen consisting of 40% 1-decanol, 40% 2-propanol and 20% water was the most appropriate polymerization mixture for preparation of HEMA-MBA copolymer...
August 21, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Gang Wang, Kerui Li, Francis J Purcell, De Zhao, Wei Zhang, Zhongyuan He, Shuai Tan, Zhenguan Tang, Hongzhi Wang, Elsa Reichmanis
A materials fabrication concept based on a fluid-construction strategy to create three-dimensional (3D) ZnO@ZnS-Ag active nanostructures at arbitrary position within confined microchannels to form an integrated microfluidic surface-enhanced Raman spectroscopy (SERS) system is presented. The fluid-construction process allowed facile construction of the nanostructured substrates, which were shown to possess a substantial number of integrated hot spots that support SERS activity. Finite-difference time-domain (FDTD) analysis suggested that the 3D clustered geometry facilitated hot spot formation...
September 21, 2016: ACS Applied Materials & Interfaces
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