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https://www.readbyqxmd.com/read/29101061/antimicrobial-efficacy-of-drug-blended-biosynthesized-colloidal-gold-nanoparticles-from-justicia-glauca-against-oral-pathogens-a-nanoantibiotic-approach
#1
Rayappan Emmanuel, Muthupandian Saravanan, Muhammad Ovais, Sethuramasamy Padmavathy, Zabta Khan Shinwari, Periyakaruppan Prakash
Antimicrobial resistance is a challenging task for researchers to develop new strategies. Green synthesis of AuNPs is an eco-friendly approach, which can be utilized in the microbistatic and microbicidal activities. The current study is focused on Justicia glauca (aqueous leaf extract) mediated AuNPs synthesis at room temperature by treating chloroaurate ions, that shows an antagonistic effect with Azithromycin (AZM) and Clarithromycin (CLR) antibiotics against oral pathogenic bacteria and fungi (Micrococcus luteus, Bacillus subtilis, Staphylococcus aureus, Streptococcus mutans, Lactobacillus acidophilus, Escherichia coli, Pseudomonas aeruginosa, Saccharomyces cerevisiae and Candida albicans)...
October 31, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29068831/crystalloid-versus-colloid-for-intraoperative-goal-directed-fluid-therapy-using-a-closed-loop-system-a-randomized-double-blinded-controlled-trial-in-major-abdominal-surgery
#2
Alexandre Joosten, Amelie Delaporte, Brigitte Ickx, Karim Touihri, Ida Stany, Luc Barvais, Luc Van Obbergh, Patricia Loi, Joseph Rinehart, Maxime Cannesson, Philippe Van der Linden
BACKGROUND: The type of fluid and volume regimen given intraoperatively both can impact patient outcome after major surgery. This two-arm, parallel, randomized controlled, double-blind, bi-center superiority study tested the hypothesis that when using closed-loop assisted goal-directed fluid therapy, balanced colloids are associated with fewer postoperative complications compared to balanced crystalloids in patients having major elective abdominal surgery. METHODS: One hundred and sixty patients were enrolled in the protocol...
October 25, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29064872/no-differences-in-renal-function-between-balanced-6-hydroxyethyl-starch-130-0-4-and-5-albumin-for-volume-replacement-therapy-in-patients-undergoing-cystectomy-a-randomized-controlled-trial
#3
Tobias Kammerer, Florian Brettner, Sebastian Hilferink, Nikolai Hulde, Florian Klug, Judith Pagel, Alexander Karl, Alexander Crispin, Klaus Hofmann-Kiefer, Peter Conzen, Markus Rehm
BACKGROUND: The use of artificial colloids has declined in critical care, whereas they are still used in perioperative medicine. Little is known about the nephrotoxic potential in noncritically ill patients during routine surgery. The objective of this trial was to evaluate the influences of albumin 5% and balanced hydroxyethyl starch 6% (130/0.4) on renal function and kidney injury. METHODS: One-hundred urologic patients undergoing elective cystectomy were randomly assigned for this prospective, single-blinded, controlled study with two parallel groups to receive either albumin 5% or balanced hydroxyethyl starch 6% (130/0...
October 24, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29059118/early-haemorrhage-control-and-management-of-trauma-induced-coagulopathy-the-importance-of-goal-directed-therapy
#4
Jakob Stensballe, Hanne H Henriksen, Pär I Johansson
PURPOSE OF REVIEW: The aim of this study was to discuss the recent developments in trauma-induced coagulopathy and the evolvement of goal-directed therapy. RECENT FINDINGS: Mortality from major trauma continues to be a worldwide problem, and massive haemorrhage remains a major cause in 40% of potentially preventable trauma deaths. Development of trauma-induced coagulopathy challenges 25-35% of the patients further increasing trauma mortality. The pathophysiology of coagulopathy in trauma reflects at least two distinct mechanisms: Acute traumatic coagulopathy, consisting of endogenous heparinization, activation of the protein C pathway, hyperfibrinolysis and platelet dysfunction, and resuscitation associated coagulopathy...
December 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/29058874/multibranched-gold-nanoparticles-with-intrinsic-lat-1-targeting-capabilities-for-selective-photothermal-therapy-of-breast-cancer
#5
Zhan Yuin Ong, Shu Chen, Elham Nabavi, Anna Regoutz, David J Payne, Daniel S Elson, David T Dexter, Iain E Dunlop, Alexandra E Porter
Because of the critical role of the large neutral amino acid transporter-1 (LAT-1) in promoting tumor growth and proliferation, it is fast emerging as a highly attractive biomarker for the imaging and treatment of human malignancies, including breast cancer. While multibranched gold nanoparticles (AuNPs) have emerged as a promising modality in the photothermal therapy (PTT) of cancers, some of the key challenges limiting their clinical translation lie in the need to develop reproducible and cost-effective synthetic methods as well as the selective accumulation of sufficient AuNPs at tumor sites...
November 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29032674/doxorubicin-loaded-unimolecular-micelle-stabilized-gold-nanoparticles-as-a-theranostic-nanoplatform-for-tumor-targeted-chemotherapy-and-computed-tomography-imaging
#6
Wenjing Lin, Xiaofang Zhang, Long Qian, Na Yao, Ya Pan, Lijuan Zhang
Current research is mainly trending toward addressing the development of multifunctional nanocarriers that could precisely reach disease sites, release drugs in a controlled-manner, and act as an imaging agent for both diagnosis and targeted therapy. In this study, a pH-sensitive theranostic nanoplatform as a promising dual-functional nanovector for tumor therapy and computed tomography (CT) imaging was developed. The 21-arm star-like triblock polymer of β-cyclodextrin-{poly(ε-caprolactone)-poly(2-aminoethyl methacrylate)-poly[poly(ethylene glycol) methyl ether methacrylate]}21 [β-CD-(PCL-PAEMA-PPEGMA)21] with stable unimolecular micelles formed in aqueous solution was first synthesized by combined ROP with ARGET ATRP techniques and then was used as a template for fabricating gold nanoparticles (AuNPs) with uniform sizes and excellent colloidal stability in situ followed by the encapsulation of doxorubicin (DOX) with maximum entrapment efficiency up to 60% to generate the final product β-CD-(PCL-PAEMA-PPEGMA)21/AuNPs/DOX...
October 26, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29022942/facile-synthesis-of-gold-nanomaterials-with-unusual-crystal-structures
#7
Zhanxi Fan, Xiao Huang, Ye Chen, Wei Huang, Hua Zhang
Gold (Au) nanomaterials have attracted wide research attention, owing to their high chemical stability, promising catalytic properties, excellent biocompatibility, unique electronic structure and outstanding localized surface plasmon resonance (LSPR) absorption properties; all of which are closely related to their size and shape. Recently, crystal-phase-controlled synthesis of noble metal nanomaterials has emerged as a promising strategy to tune their physicochemical properties. This protocol describes the detailed experimental procedures for the crystal-phase-controlled syntheses of Au nanomaterials with unusual crystal structures under mild conditions...
November 2017: Nature Protocols
https://www.readbyqxmd.com/read/28994280/stable-and-biocompatible-mushroom-%C3%AE-glucan-modified-gold-nanorods-for-cancer-photothermal-therapy
#8
Xiaojie Li, Jiajing Zhou, Chaoran Liu, Qirong Xiong, Hongwei Duan, Peter C K Cheung
Naturally occurring β-glucans have been widely regarded as a natural source for functional foods and pharmaceuticals due to their immunomodulatory property and antitumor activity. However, physicochemically stable and biocompatible β-glucans are rarely explored as a carrier for nanomaterials to overcome the problems of aggregation and nanotoxicity. Here, we developed highly stable and biocompatible mushroom β-glucan coated gold nanorods (AuNR-Glu) for cancer photothermal therapy by integrating Pleurotus tuber-regium sclerotial β-glucan (Glu) and plasmonic gold nanorods (AuNRs) possessing photothermal property in the second near-infrared (NIR-II) window...
October 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28992877/perioperative-fluid-management-in-major-hepatic-resection-an-integrative-review
#9
REVIEW
Osamu Yoshino, Marcos Vinicius Perini, Christopher Christophi, Laurence Weinberg
BACKGROUND: Fluid intervention and vasoactive pharmacological support during hepatic resection depend on the preference of the attending clinician, institutional resources, and practice culture. Evidence-based recommendations to guide perioperative fluid management are currently limited. Therefore, we provide a contemporary clinical integrative overview of the fundamental principles underpinning fluid intervention and hemodynamic optimization for adult patients undergoing major hepatic resection...
October 15, 2017: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/28985674/iodide-switched-deposition-for-the-synthesis-of-segmented-pd-au-pd-nanorods-crystal-facet-matters
#10
Siyu Liu, Wenxin Niu, Shaik Firdoz, Weiqing Zhang
Segmented metallic nanorods with well-defined shapes and controllable components play an important role on the systematic investigation of their shape-dependent catalytic, electric, and plasmonic properties of metal nanostructures. Unfortunately, the shape and composition of segmented nanorods are difficult to be precisely controlled via colloidal methods. Here, we reported the growth of Pd-Au-Pd bimetallic heterostructures by using Au 5-fold twinned bipyramids (BPs) as seeds, with KI as a structure-directing reagent...
October 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28981592/comparison-of-two-stroke-volume-variation-based-goal-directed-fluid-therapies-for-supratentorial-brain-tumour-resection-a-randomized-controlled-trial
#11
C Y Wu, Y S Lin, H M Tseng, H L Cheng, T S Lee, P L Lin, W H Chou, Y J Cheng
Background: The optimal volume status for neurosurgery has yet to be determined. We compared two fluid protocols based on different stroke volume variation (SVV) cut-offs for goal-directed fluid therapy (GDFT) during supratentorial brain tumour resection. Methods: A randomized, single-blind, open-label trial was conducted. Eighty adult patients undergoing elective supratentorial brain tumour resection were randomly divided into a low SVV and a high SVV group. The SVV cut-offs were used to determine when to initiate colloid infusion...
November 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28976345/-impact-of-a-goal-directed-therapy-in-the-implementation-of-an-eras-enhanced-recovery-after-surgery-protocol-in-laparoscopic-radical-cystectomy
#12
Rafael Uña Orejón, Ivan Huercio Martinez, Estrella Mateo Torres, Cristina Jofré Escudero, Juan Gomez Rivas, Jesús Diez Sebastián, Maria Prado Ureta Tolsada
OBJECTIVES: The intraoperative goaldirected fluid therapy (GDT) has become the base of perioperative management in the fast-track protocols. This program using technology to estimate cardiac output, with the aim of minimizing splanchnic hypoperfusion. However, there is insufficient evidence to confirm its application in radical laparoscopic cystectomy. METHODS: In a retrospective study, we have included 52 patients that were scheduled for radical cystectomy. In group A (n=32) patients were treated following GDT...
October 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28953310/adverse-effects-of-crystalloid-and-colloid-fluids
#13
Robert G Hahn
Guidelines for infusion fluid therapy rarely take into account that adverse effects occur in a dose-dependent fashion. Adverse effects of crystalloid fluids are related to their preferential distribution to the interstitium of the subcutis, the gut, and the lungs. The gastrointestinal recovery time is prolonged by 2 days when more than 2 litres is administered. Infusion of 6-7 litres during open abdominal surgery results in poor wound healing, pulmonary oedema, and pneumonia. There is also a risk of fatal postoperative pulmonary oedema that might develop several days after the surgery...
September 27, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28941551/light-controlled-drug-release-from-singlet-oxygen-sensitive-nanoscale-coordination-polymers-enabling-cancer-combination-therapy
#14
Jingjing Liu, Guangbao Yang, Wenwen Zhu, Ziliang Dong, Yu Yang, Yu Chao, Zhuang Liu
The development of smart drug delivery systems to realize controlled drug release for highly specific cancer treatment has attracted tremendous attention. Herein, nanoscale coordination polymers (NCPs) constructed from hafnium ions and bis-(alkylthio) alkene (BATA), a singlet-oxygen responsive linker, are fabricated and applied as nanocarriers to realize light-controlled drug release under a rather low optical power density. In this system, NCPs synthesized through a solvothermal method are sequentially loaded with chlorin e6 (Ce6), a photosensitizer, and doxorubicin (DOX), a chemotherapeutic drug, and then coated with lipid bilayer to allow modification with polyethylene glycol (PEG) to acquire excellent colloidal stability...
November 2017: Biomaterials
https://www.readbyqxmd.com/read/28933805/perioperative-administration-of-buffered-versus-non-buffered-crystalloid-intravenous-fluid-to-improve-outcomes-following-adult-surgical-procedures
#15
REVIEW
Sohail Bampoe, Peter M Odor, Ahilanandan Dushianthan, Elliott Bennett-Guerrero, Suzie Cro, Tong J Gan, Michael Pw Grocott, Michael Fm James, Michael G Mythen, Catherine Mn O'Malley, Anthony M Roche, Kathy Rowan, Edward Burdett
BACKGROUND: Perioperative fluid strategies influence clinical outcomes following major surgery. Many intravenous fluid preparations are based on simple solutions, such as normal saline, that feature an electrolyte composition that differs from that of physiological plasma. Buffered fluids have a theoretical advantage of containing a substrate that acts to maintain the body's acid-base status - typically a bicarbonate or a bicarbonate precursor such as maleate, gluconate, lactate, or acetate...
September 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28929101/current-trends-in-volume-replacement-therapy-and-the-use-of-synthetic-colloids-in-small-animals-an-internet-based-survey-2016
#16
Ivayla D Yozova, Judith Howard, Nadja E Sigrist, Katja-Nicole Adamik
The use of synthetic colloids (SCs), particularly hydroxyethyl starch (HES), in people has changed in recent years following new evidence raising concerns about their efficacy and safety. Although fluid therapy guidelines for small animals are often extrapolated from human medicine, little information exists on current practice in veterinary medicine. The objective of the present study was to investigate current fluid selection, use of plasma volume expanders including SCs, and recent changes in their use in small animal practice...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28923716/investigation-of-the-effect-of-pomegranate-extract-and-monodisperse-silver-nanoparticle-combination-on-mcf-7-cell-line
#17
Birgütay Şahin, Enes Demir, Ayşenur Aygün, Hülya Gündüz, Fatih Şen
In this study, we aimed to investigate whether the combination therapy of pomegranate extract and silver nanoparticle is effective on MCF-7 cell culture. The pomegranate extract was mixed and incubated with silver nitrate for the microwave assisted green synthesized of silver nanoparticle. Obtained nanoparticles were investigated using X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), UV-vis, Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM) methods The spectroscopic and morphological studies of the monodisperse Ag NPs which have particle size of 15...
September 18, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28884212/routine-sildenafil-does-not-improve-clinical-outcomes-after-fontan-operation
#18
J Leslie Gaddis Collins, Mark A Law, Santiago Borasino, W Clinton Erwin, David C Cleveland, Jeffrey A Alten
Fontan operation can be complicated by persistent chest tube output (CTO) leading to prolonged hospital length of stay (LOS). Postoperative sildenafil administration has been shown to improve clinical outcomes in selected patients after Fontan. We initiated a practice change utilizing intravenous (IV) sildenafil in early postoperative period in all patients undergoing Fontan operation with aim to decrease LOS and CTO. Nineteen patients (February 2014-May 2016) received 0.35 mg/kg sildenafil IV (three doses) followed by enteral, 1 mg/kg every eight hours until hospital discharge...
September 7, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28866195/polyglycerol-mediated-covalent-construction-of-magnetic-mesoporous-silica-nanohybrid-with-aqueous-dispersibility-for-drug-delivery
#19
Xiaoxin Yang, Yu Wen, Anqing Wu, Meiyun Xu, Tsukuru Amano, Luyi Zheng, Li Zhao
Construction of nanohybrids with chemical and colloidal stability is of great importance for the exploration of their potential applications in biomedical field. In this work, a versatile strategy based on polyglycerol (PG) mediated covalent linkage is developed to fabricate a core-satellite nanohybrid, termed MMSN, consisting of a mesoporous silica nanoparticle (MSN) as a core and many superparamagnetic iron oxide nanoparticles (SPION) on the outer surface. In this synthetic strategy, the PG grafted SPION is derivatized to convert partial periphery hydroxyl groups to carboxyl moieties, followed by attachment to aminated MSN through amide bonds...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28855088/drug-nanocarriers-to-treat-autoimmunity-and-chronic-inflammatory-diseases
#20
REVIEW
Davide Prosperi, Miriam Colombo, Ivan Zanoni, Francesca Granucci
Nanoparticles represent a new generation of drug delivery systems that can be engineered to harness optimal target selectivity for specific cells and tissues and high drug loading capacity, allowing for improved pharmacokinetics and enhanced bioavailability of therapeutics. The spontaneous propensity of both organic and colloidal nanoparticles to be captured by the cells of the reticuloendothelial system encouraged their utilization as passive targeting systems that can be preferentially directed to innate immune cells, such as macrophages, dendritic cells and neutrophils...
August 28, 2017: Seminars in Immunology
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