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https://www.readbyqxmd.com/read/28741501/retinoblastoma-binding-protein-6-another-p53-monitor
#1
Monde Ntwasa
The retinoblastoma binding protein 6 (RBBP6), a p53 negative regulator, is essential for embryonic development. Its loss-of-function phenotype is similar to mouse double minute homolog (MDM2), the prototypical negative regulator of p53. This article draws attention to the molecular and biological functions of RBBP6 and to its association with carcinogenesis.
November 2016: Trends in Cancer
https://www.readbyqxmd.com/read/28741302/estimates-of-biologic-variation-in-specific-feline-pancreatic-lipase-concentrations-in-cats-without-clinical-or-ultrasonographic-evidence-of-pancreatitis
#2
Margaret Cohn-Urbach, Craig G Ruaux, Sarah Nemanic
BACKGROUND: Serum concentrations of feline-specific pancreatic lipase are commonly used for diagnosis and monitoring of pancreatitis in cats, but little is known regarding biologic variation of this analyte. OBJECTIVES: The purpose of the study was to determine biologic variation, index of individuality, and reference change values (RCV) for specific feline pancreatic lipase concentrations (Spec fPL) in apparently healthy cats. METHODS: Four blood samples were collected prospectively from 12 apparently healthy cats at 2-week intervals...
July 24, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28740553/a-fluorogenic-probe-for-ultrafast-and-reversible-detection-of-formaldehyde-in-neurovascular-tissues
#3
Xing-Guang Liang, Bo Chen, Ling-Xiao Shao, Juan Cheng, Ming-Zhu Huang, Yu Chen, Yong-Zhou Hu, Yi-Feng Han, Feng Han, Xin Li
Formaldehyde (FA) is endogenously produced in live systems and has been implicated in a diverse array of pathophysiological processes. To disentangle the detailed molecular mechanisms of FA biology, a reliable method for monitoring FA changes in live cells would be indispensable. Although there have been several fluorescent probes reported to detect FA, most are limited by the slow detection kinetics and the intrinsic disadvantage of detecting FA in an irreversible manner which may disturb endogenous FA homeostasis...
2017: Theranostics
https://www.readbyqxmd.com/read/28738906/next-generation-sequencing-to-monitor-the-spread-of-antimicrobial-resistance
#4
Michael Otto
Next-generation sequencing is increasingly being used to monitor current and historic events related to the emergence and spread of antimicrobial resistance. In a recent publication, researchers analyzed the rise of methicillin-resistant Staphylococcus aureus in the 1960s, emphasizing that adaptations conferring antibiotic resistance might pre-date the introduction of novel antibiotic derivatives. Other researchers have evaluated the role of transmission within a healthcare network, using the example of extended-spectrum beta-lactamase-resistant Escherichia coli...
July 25, 2017: Genome Medicine
https://www.readbyqxmd.com/read/28738662/highly-efficient-enrichment-of-low-abundance-intact-proteins-by-core-shell-structured-fe3o4-chitosan-graphene-composites
#5
Peng Zhang, Xiaoni Fang, Guoquan Yan, Mingxia Gao, Xiangmin Zhang
In proteomics research, the screening and monitoring of disease biomarkers is still a major challenge, mainly due to their low concentration in biological samples. However, the universal enrichment of intact proteins has not been further studied. In this work, we developed a Fe3O4-chitosan@graphene (Fe3O4-CS@G) core-shell composite to enrich low-abundance proteins from biological samples. Fe3O4-CS@G composite holds chitosan layer decorated Fe3O4 core, which improves the hydrophilicity of materials greatly. Meanwhile, the graphene nanosheets shell formed via electrostatic assembly endows the composite with huge surface area (178m(2)/g)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738631/a-review-aptamer-based-analytical-strategies-using-the-nanomaterials-for-environmental-and-human-monitoring-of-toxic-heavy-metals
#6
REVIEW
Leila Farzin, Mojtaba Shamsipur, Shahab Sheibani
Recent developments in biotechnology offer the new methods for the sensitive detection of heavy metals based on the affinity and specificity of aptamers, as nucleic acid ligands selected from random sequence pools in vitro. Heavy metals have received considerable importance as the most toxic metallic pollutants which may cause serious environmental damages. They are classified as trace elements because of their presence in trace concentrations in various environmental matrices. Thus, the precise and sensitive methods to detect heavy metals are important to ensure human and environment safety...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738608/a-fast-bioanalytical-method-based-on-microextraction-by-packed-sorbent-and-uplc-ms-ms-for-determining-new-psychoactive-substances-in-oral-fluid
#7
A M Ares, P Fernández, M Regenjo, A M Fernández, A M Carro, R A Lorenzo
The emergence in recent years of potentially dangerous new psychoactive substances (NPS) that are not under international control has led to the development of multi-analyte procedures for their unequivocal quantification. A fast ultra-performance liquid chromatography-tandem mass spectrometry method (UPLC-MS/MS), in combination with a sample pretreatment based on microextraction by packed sorbent (MEPS), was for the first time used in this work for the simultaneous determination of NPS in oral fluid. This matrix is an effective alternative to typical biological samples for drug control in substitution therapy programs, and also for the prevention and reduction of traffic accidents...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738574/a-highly-selective-and-sensitive-fluorescent-probe-for-hypochlorous-acid-and-its-lysosome-targetable-biological-applications
#8
Chang Liu, Xiaojie Jiao, Song He, Liancheng Zhao, Xianshun Zeng
A novel lysosome-targetable fluorescence probe PT-1 based on a photoinduced electron transfer (PET) mechanism has been designed and synthesized. For comparison, the probe PT-2 without morpholine moiety as a lysosome-directing group was also synthesized and investigated. Probes PT-1 and PT-2 exhibited high selectivity, high sensitivity (with the detection limits down to the 10(-10)M range) and response in real time (within 10s) toward HOCl over other reactive oxygen species (ROS). Both PT-1 and PT-2 were cell permeable and enabled them to be used for monitoring of HOCl in living cells...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738230/fluorinated-tripodal-receptors-for-potentiometric-chloride-detection-in-biological-fluids
#9
Nadezda Pankratova, Maria Cuartero, Laura A Jowett, Ethan N W Howe, Philip A Gale, Eric Bakker, Gastón A Crespo
Fluorinated tripodal compounds were recently reported to be efficient transmembrane transporters for a series of inorganic anions. In particular, this class of receptors has been shown to be suitable for the effective complexation of chloride, nitrate, bicarbonate and sulfate anions via hydrogen bonding. The potentiometric properties of urea and thiourea-based fluorinated tripodal receptors are explored here for the first time, in light of the need for reliable sensors for chloride monitoring in undiluted biological fluids...
July 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28737687/new-cinchona-oximes-evaluated-as-reactivators-of-acetylcholinesterase-and-butyrylcholinesterase-inhibited-by-organophosphorus-compounds
#10
Maja Katalinić, Antonio Zandona, Alma Ramić, Tamara Zorbaz, Ines Primožič, Zrinka Kovarik
For the last six decades, researchers have been focused on finding efficient reactivators of organophosphorus compound (OP)-inhibited acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). In this study, we have focused our research on a new oxime scaffold based on the Cinchona structure since it was proven to fit the cholinesterases active site and reversibly inhibit their activity. Three Cinchona oximes (C1, C2, and C3), derivatives of the 9-oxocinchonidine, were synthesized and investigated in reactivation of various OP-inhibited AChE and BChE...
July 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28736778/facile-synthesis-of-black-phosphorus-au-nanocomposites-for-enhanced-photothermal-cancer-therapy-and-surface-enhanced-raman-scattering-analysis
#11
Guangcun Yang, Zhiming Liu, Yi Li, Yuqing Hou, Xixi Fei, Chengkang Su, Songmao Wang, Zhengfei Zhuang, Zhouyi Guo
Black phosphorus (BP), a new type of two-dimensional nanomaterial, has attracted crucial attention in recent years owing to its excellent properties and great potential in various chemical, physical, and biological fields. In this study, BP nanosheets loaded with Au nanoparticles (BP-Au NSs) are obtained by a one-step facile synthetic method. The Au nanostructures can not only enhance the photothermal efficiency of the nanocomposites, but also endow BP-Au NSs with the potential to act as effective surface-enhanced Raman scattering (SERS) substrates for Raman biodetection...
July 24, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28736676/label-free-photoacoustic-imaging-of-the-cardio-cerebrovascular-development-in-the-embryonic-zebrafish
#12
Qian Chen, Tian Jin, Weizhi Qi, Xianming Mo, Lei Xi
Zebrafish play an important role in biology, pharmacology, toxicology, and medicine. The cardio-cerebrovascular development of zebrafish is particularly critical to understand both brain disorders and cardiovascular diseases in human. In this paper, we applied optical resolution photoacoustic microscopy (ORPAM) to image the whole-body vasculature of the embryonic zebrafish with a special focus on the development of the cardio-cerebrovascular system. Using the intrinsic optical absorption contrast of the embryo, we successfully visualized the formation of the cardio-cerebrovascular network in high-resolution using a 10 × objective, and monitored the whole-body vascular development using a 4 × objective...
April 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28736274/biomarkers-as-a-treatment-guide-in-rheumatoid-arthritis
#13
Tsutomu Takeuchi
It is anticipated that biomarkers support rheumatologists to judge a group of patients that can improve the diagnosis and prognosis, and further facilitate appropriate and precise treatment with targeted therapy. In particular, biomarkers for predicting and monitoring response to biological disease modifying anti-rheumatic drugs (DMARDs) are demanding. Given the mechanism action of biological DMARDs is much more simple than the conventional synthetic DMARDs, a variety of approaches to find such biomarkers has been taken recent years...
July 20, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28736056/variability-of-glycated-hemoglobin-levels-in-the-first-year-post-renal-transplantation-in-patients-without-diabetes
#14
Ana Laura Pimentel, Joíza Lins Camargo
BACKGROUND: Glycated hemoglobin (HbA1c) is an alternative test used for the diagnosis and monitoring of diabetes in kidney transplant recipients. Immunosuppressive drugs are the most important risk factors related with changes in the glucose metabolism after transplant. It is still unknown if they impact on the variability of HbA1c. We assessed the variability of HbA1c levels in a group of renal transplant recipients without diabetes during the first year after transplant. METHODS: We estimated the variability of HbA1c in a group of 95 Brazilian kidney transplant recipients...
July 20, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28735534/investigation-and-application-of-a-new-passive-sampling-technique-for-in-situ-monitoring-of-illicit-drugs-in-waste-waters-and-rivers
#15
Changsheng Guo, Tingting Zhang, Song Hou, Jiapei Lv, Yuan Zhang, Fengchang Wu, Zhendong Hua, Wei Meng, Hao Zhang, Jian Xu
Illicit drugs constitute a class of emerging contaminants that has been drawing significant concern due to its potent pharmacological and biological activities. In this study, an in situ passive sampling approach that uses diffusive gradients in thin films (DGT) was successfully tested for measuring ketamine (KET), methamphetamine (METH), and amphetamine (AMP) in water. The diffusion coefficients of KET, METH, and AMP in diffusive gel were (8.13±0.12)×10-6, (8.55±0.14)×10-6, and (7.72±0.18)×10-6 cm2 s-1 at 22 °C, respectively...
July 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28735492/isolation-of-biologically-active-exosomes-from-plasma-of-patients-with-cancer
#16
Chang-Sook Hong, Sonja Funk, Theresa L Whiteside
A method for exosome isolation from human plasma was developed for rapid, high-throughput processing of plasma specimens obtained from patients with cancer. This method removes the bulk of plasma proteins associated with exosomes and can be used for comparative examinations of exosomes and their content in serial specimens of patients' plasma, allowing for monitoring changes in exosome numbers, profiles, and functions in the course of cancer progression or during therapy. The plasma-derived exosomes can be recovered in quantities sufficient for the characterization of their morphology by transmission electron microscopy (TEM), size and concentration by qNano, protein/lipid ratios, nucleic acid extraction, molecular profiling by Western blots or immune arrays, and functional assays...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28735109/design-and-rationale-for-a-real-world-observational-cohort-of-patients-with-nonalcoholic-fatty-liver-disease-the-target-nash-study
#17
A Sidney Barritt, Norman Gitlin, Samuel Klein, Anna S Lok, Rohit Loomba, Laura Malahias, Margaret Powell, Miriam B Vos, L Michael Weiss, Kenneth Cusi, Brent A Neuschwander-Tetri, Arun Sanyal
Nonalcoholic fatty liver disease (NAFLD) is highly prevalent and can lead to cirrhosis, hepatocellular carcinoma, and end-stage liver disease. NAFLD comprises the spectrum from simple steatosis (nonalcoholic fatty liver, NAFL), to steatosis with inflammation (nonalcoholic steatohepatitis, NASH). Current primary therapy recommended for NAFLD is weight loss induced by lifestyle modification. The difficulty in achieving this has led to robust pharmacological therapy development. While new drugs may show efficacy in selected phase II/III clinical trial populations, their real-world effectiveness is unknown...
July 19, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28734369/systematic-comparison-of-exosomal-proteomes-from-human-saliva-and-serum-for-the-detection-of-lung-cancer
#18
Yan Sun, Sha Liu, Zhi Qiao, Zhi Shang, Zhijun Xia, Xiaomin Niu, Liqiang Qian, Yan Zhang, Liuyin Fan, Cheng-Xi Cao, Hua Xiao
Circulating tumor exosomes harbor plenty of cancer biological information, which have emerged as promising targets for cancer early detection and diagnosis. Human serum and saliva are unique diagnostic body fluids, which contain numerous circulating exosomes. It is necessary to establish standardized isolation method and compare their proteome profiling for translational medicine. High abundant proteins in these body fluids were removed before exosomes isolation and obtained exosomes were further confirmed by morphology analysis and surface biomarker test...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734199/endosulfan-poisoning-an-overview
#19
REVIEW
Ritesh G Menezes, Tooba Fatima Qadir, Ariba Moin, Huda Fatima, Syed Ather Hussain, Mohammed Madadin, Syed Bilal Pasha, Fatima A Al Rubaish, S Senthilkumaran
Endosulfan, an organochlorine (OC) insecticide, is a widely used agricultural pesticide, despite its life threatening toxic effects. In this review, the pharmacokinetics of endosulfan, mechanism of endosulfan toxicity, clinical presentations and management, histopathological findings, and toxicological analysis are described, in addition to its environmental toxicity. The toxic effects of endosulfan can affect many organs and systems presenting in a wide array of signs and symptoms. Although termed a restricted OC-classed pesticide, it continues to be used, especially in the developing world, owing to its beneficial effects on agriculture...
July 5, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28734051/a-user-s-guide-for-%C3%AE-synuclein-biomarker-studies-in-biological-fluids-perianalytical-considerations
#20
REVIEW
Brit Mollenhauer, Richard Batrla, Omar El-Agnaf, Douglas R Galasko, Hilal A Lashuel, Kalpana M Merchant, Lesley M Shaw, Dennis J Selkoe, Robert Umek, Hugo Vanderstichele, Henrik Zetterberg, Jing Zhang, Chelsea Caspell-Garcia, Chris Coffey, Samantha J Hutten, Mark Frasier, Peggy Taylor
Parkinson's disease biomarkers are needed to increase diagnostic accuracy, to objectively monitor disease progression and to assess therapeutic efficacy as well as target engagement when evaluating novel drug and therapeutic strategies. This article summarizes perianalytical considerations for biomarker studies (based on immunoassays) in Parkinson's disease, with emphasis on quantifying total α-synuclein protein in biological fluids. Current knowledge and pitfalls are discussed, and selected perianalytical variables are presented systematically, including different temperature of sample collection and types of collection tubes, gradient sampling, the addition of detergent, aliquot volume, the freezing time, and the different thawing methods...
July 22, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
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