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https://www.readbyqxmd.com/read/28088092/aptamer-based-environmental-biosensors-for-small-molecule-contaminants
#1
REVIEW
Van-Thuan Nguyen, Young Seop Kwon, Man Bock Gu
Aptasensors are promising biosensors, which take advantage of using aptamers as a recognition element. The combination of the excellent characteristics of aptamers and the leading detection platform techniques, such as optical, electrochemical with nanomaterial-integrated, or mass-sensitive techniques with high sensitivity and specificity draws a promising view for the application of the aptasensors for the detection of harmful small toxic chemicals and real-time monitoring in the environments. In spite of attraction of aptasensors, application of them is limited to the complex environment due to the facts that how the immobilization of aptamers onto the surface affects the functions of aptamers and their structures for the detection of environmental contaminants are not clearly known...
January 11, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28088073/strategies-to-design-clinical-studies-to-identify-predictive-biomarkers-in-cancer-research
#2
REVIEW
Jose Luis Perez-Gracia, Miguel F Sanmamed, Ana Bosch, Ana Patiño-Garcia, Kurt A Schalper, Victor Segura, Joaquim Bellmunt, Josep Tabernero, Christopher J Sweeney, Toni K Choueiri, Miguel Martín, Juan Pablo Fusco, Maria Esperanza Rodriguez-Ruiz, Alfonso Calvo, Celia Prior, Luis Paz-Ares, Ruben Pio, Enrique Gonzalez-Billalabeitia, Alvaro Gonzalez Hernandez, David Páez, Jose María Piulats, Alfonso Gurpide, Mapi Andueza, Guillermo de Velasco, Roberto Pazo, Enrique Grande, Pilar Nicolas, Francisco Abad-Santos, Jesus Garcia-Donas, Daniel Castellano, María J Pajares, Cristina Suarez, Ramon Colomer, Luis M Montuenga, Ignacio Melero
The discovery of reliable biomarkers to predict efficacy and toxicity of anticancer drugs remains one of the key challenges in cancer research. Despite its relevance, no efficient study designs to identify promising candidate biomarkers have been established. This has led to the proliferation of a myriad of exploratory studies using dissimilar strategies, most of which fail to identify any promising targets and are seldom validated. The lack of a proper methodology also determines that many anti-cancer drugs are developed below their potential, due to failure to identify predictive biomarkers...
December 30, 2016: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28088022/valorization-of-aluminum-scrap-via-an-acid-washing-treatment-for-reductive-removal-of-toxic-bromate-from-water
#3
Kun-Yi Andrew Lin, Jia-Yin Lin, Hsing-Lung Lien
Aluminum scrap (AS) is adopted for the first time as a readily available aluminum source to prepare zero-valent aluminum (ZVAl) for removing bromate from water via a reductive reaction. Since aluminum is easily oxidized to aluminum oxide (Al2O3) on exposure to air, an acid-washing pretreatment on AS is developed to remove the layer of Al2O3. HCl is found as the most effective acid to pretreat AS and the HCl-pretreated or acid-washed AS (AWAS) is able to remove bromate from water and convert it to bromide. Factors, such as temperature, pH, co-existing anions, and particle size, which influence the bromate removal using AWAS are also investigated...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28087591/clinical-trials-in-antineutrophil-cytoplasmic-antibody-associated-vasculitis-what-we-have-learnt-so-far-and-what-we-still-have-to-learn
#4
Divi Cornec, Emilie Cornec-Le Gall, Ulrich Specks
The prognosis of the antineutrophil cytoplasmic antibody associated vasculitides (AAV), microscopic polyangiitis (MPA), granulomatosis with polyangiitis (GPA) and eosinophilic GPA (EGPA), has been fundamentally improved over the last five decades by the use of glucocorticoids and immunosuppressants, turning them from consistently fatal diseases into chronic conditions. The long-term course is now largely determined by the frequency of disease flares and by accruing damage caused by disease activity and treatment-related comorbidities...
January 12, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28087322/cutaneous-exposure-to-vesicant-phosgene-oxime-acute-effects-on-the-skin-and-systemic-toxicity
#5
Neera Tewari-Singh, Dinesh G Goswami, Rama Kant, Claire R Croutch, Robert P Casillas, David J Orlicky, Rajesh Agarwal
Phosgene Oxime (CX), an urticant or nettle agent categorized as a vesicant, is a potential chemical warfare and terrorist weapon. Its exposure can result in widespread and devastating effects including high mortality due to its fast penetration and ability to cause immediate severe cutaneous injury. It is one of the least studied chemical warfare agents with no effective therapy available. Thus, our goal was to examine the acute effects of CX following its cutaneous exposure in SKH-1 hairless mice to help establish a relevant injury model...
January 10, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28086920/absence-of-system-xc-on-immune-cells-invading-the-central-nervous-system-alleviates-experimental-autoimmune-encephalitis
#6
Ellen Merckx, Giulia Albertini, Magdalena Paterka, Cathy Jensen, Philipp Albrecht, Michael Dietrich, Joeri Van Liefferinge, Eduard Bentea, Lise Verbruggen, Thomas Demuyser, Lauren Deneyer, Jan Lewerenz, Geert van Loo, Jacques De Keyser, Hideyo Sato, Pamela Maher, Axel Methner, Ann Massie
BACKGROUND: Multiple sclerosis (MS) is an autoimmune demyelinating disease that affects the central nervous system (CNS), leading to neurodegeneration and chronic disability. Accumulating evidence points to a key role for neuroinflammation, oxidative stress, and excitotoxicity in this degenerative process. System xc(-) or the cystine/glutamate antiporter could tie these pathological mechanisms together: its activity is enhanced by reactive oxygen species and inflammatory stimuli, and its enhancement might lead to the release of toxic amounts of glutamate, thereby triggering excitotoxicity and neurodegeneration...
January 13, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28086831/evaluation-of-the-cytotoxicity-of-the-bithionol-cisplatin-combination-in-a-panel-of-human-ovarian-cancer-cell-lines
#7
Vijayalakshmi N Ayyagari, Tsung-Han Jeff Hsieh, Paula L Diaz-Sylvester, Laurent Brard
BACKGROUND: Combination drug therapy appears a promising approach to overcome drug resistance and reduce drug-related toxicities in ovarian cancer treatments. In this in vitro study, we evaluated the antitumor efficacy of cisplatin in combination with Bithionol (BT) against a panel of ovarian cancer cell lines with special focus on cisplatin-sensitive and cisplatin-resistant cell lines. The primary objectives of this study are to determine the nature of the interactions between BT and cisplatin and to understand the mechanism(s) of action of BT-cisplatin combination...
January 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28086830/sigma-2-receptor-agonist-derivatives-of-1-cyclohexyl-4-3-5-methoxy-1-2-3-4-tetrahydronaphthalen-1-yl-propyl-piperazine-pb28-induce-cell-death-via-mitochondrial-superoxide-production-and-caspase-activation-in-pancreatic-cancer
#8
Maria Laura Pati, John R Hornick, Mauro Niso, Francesco Berardi, Dirk Spitzer, Carmen Abate, William Hawkins
BACKGROUND: Despite considerable efforts by scientific research, pancreatic cancer is the fourth leading cause of cancer related mortalities. Sigma-2 receptors, which are overexpressed in several tumors, represent promising targets for triggering selective pancreatic cancer cells death. METHODS: We selected five differently structured high-affinity sigma-2 ligands (PB28, PB183, PB221, F281 and PB282) to study how they affect the viability of diverse pancreatic cancer cells (human cell lines BxPC3, AsPC1, Mia PaCa-2, and Panc1 and mouse Panc-02, KCKO and KP-02) and how this is reflected in vivo in a tumor model...
January 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28086803/compendium-of-tcdd-mediated-transcriptomic-response-datasets-in-mammalian-model-systems
#9
Stephenie D Prokopec, Kathleen E Houlahan, Ren X Sun, John D Watson, Cindy Q Yao, Jamie Lee, Christine P'ng, Renee Pang, Alexander H Wu, Lauren C Chong, Ashley B Smith, Nicholas J Harding, Ivy D Moffat, Jere Lindén, Sanna Lensu, Allan B Okey, Raimo Pohjanvirta, Paul C Boutros
BACKGROUND: 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is the most potent congener of the dioxin class of environmental contaminants. Exposure to TCDD causes a wide range of toxic outcomes, ranging from chloracne to acute lethality. The severity of toxicity is highly dependent on the aryl hydrocarbon receptor (AHR). Binding of TCDD to the AHR leads to changes in transcription of numerous genes. Studies evaluating the transcriptional changes brought on by TCDD may provide valuable insight into the role of the AHR in human health and disease...
January 13, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28086782/in-vivo-antiplasmodial-activity-and-toxicological-assessment-of-hydroethanolic-crude-extract-of-ajuga-remota
#10
Aschalew Nardos, Eyasu Makonnen
BACKGROUND: Malaria is one of the most life-threatening health problems worldwide and treatment has been compromised by drug resistance. Identifying lead molecules from natural products might help to find better anti-malarial drugs, since those obtained from natural sources are still effective against malarial parasites. This study aimed at investigating the in vivo antiplasmodial activity of crude extract of the leaves of Ajuga remota together with its safety in mice models. METHODS: In vivo parasite growth inhibitory effect of crude extract was assessed in mice inoculated with Plasmodium berghei (ANKA strain)...
January 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28081197/morphine-withdrawal-modifies-prion-protein-expression-in-rat-hippocampus
#11
Vincenzo Mattei, Stefano Martellucci, Francesca Santilli, Valeria Manganelli, Tina Garofalo, Niccolò Candelise, Alessandra Caruso, Maurizio Sorice, Sergio Scaccianoce, Roberta Misasi
The hippocampus is a vulnerable brain structure susceptible to damage during aging and chronic stress. Repeated exposure to opioids may alter the brain so that it functions normally when the drugs are present, thus, a prolonged withdrawal might lead to homeostatic changes headed for the restoration of the physiological state. Abuse of morphine may lead to Reacting Oxygen Species-induced neurodegeneration and apoptosis. It has been proposed that during morphine withdrawal, stress responses might be responsible, at least in part, for long-term changes of hippocampal plasticity...
2017: PloS One
https://www.readbyqxmd.com/read/28080135/characteristics-properties-and-analytical-methods-of-amoxicillin-a-review-with-green-approach
#12
Bianca Aparecida de Marco, Jéssica Sayuri Hisano Natori, Stefany Fanelli, Eliane Gandolpho Tótoli, Hérida Regina Nunes Salgado
Bacterial infections are the second leading cause of global mortality. Considering this fact, it is extremely important studying the antimicrobial agents. Amoxicillin is an antimicrobial agent that belongs to the class of penicillins; it has bactericidal activity and is widely used in the Brazilian health system. In literature, some analytical methods are found for the identification and quantification of this penicillin, which are essential for its quality control, which ensures maintaining the product characteristics, therapeutic efficacy and patient's safety...
January 12, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28080075/cognitive-outcomes-in-early-treated-adults-with-phenylketonuria-pku-a-comprehensive-picture-across-domains
#13
Liana Palermo, Tarekegn Geberhiwot, Anita MacDonald, Ellie Limback, S Kate Hall, Cristina Romani
OBJECTIVE: Phenylketonuria (PKU) is an inherited metabolic disease which affects cognitive functions due to an inability to metabolize phenylalanine which leads to the accumulation of toxic by-products (Phe) in the brain. PKU can be effectively treated with a low phenylalanine diet, but some cognitive deficits remain. Studies have reported impairments, especially for processing speed and executive functions, but there is a lack of comprehensive assessment across cognitive domains. Moreover, it is important to establish outcomes in early treated adults with PKU (AwPKU) who have better metabolic control than groups previously reported in the literature...
January 12, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28079886/hiv-1-nef-is-released-in-extracellular-vesicles-derived-from-astrocytes-evidence-for-nef-mediated-neurotoxicity
#14
A Sami Saribas, Stephanie Cicalese, Taha Mohseni Ahooyi, Kamel Khalili, Shohreh Amini, Ilker Kudret Sariyer
Human immunodeficiency virus-associated neurological disorders (HANDs) affect the majority of AIDS patients and are a significant problem among HIV-1-infected individuals who live longer because of combined anti-retroviral therapies. HIV-1 utilizes a number of viral proteins and subsequent cytokine inductions to unleash its toxicity on neurons. Among HIV-1 viral proteins, Nef is a small protein expressed abundantly in astrocytes of HIV-1-infected brains and has been suggested to have a role in the pathogenesis of HAND...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28079805/toxicities-of-different-first-line-chemotherapy-regimens-in-the-treatment-of-advanced-ovarian-cancer-a-network-meta-analysis
#15
Chang-Ping Qu, Gui-Xia Sun, Shao-Qin Yang, Jun Tian, Jin-Ge Si, Yi-Feng Wang
BACKGROUND: Ovarian cancer (OC) is the 5th leading cause of cancer-related deaths around the world, and several chemotherapy regimens have been applied in the treatment of OC. We aim to compare toxicities of different chemotherapy regimens in the treatment of advanced ovarian cancer (AOC) using network meta-analysis. METHODS: Literature research in Cochrane Library, PubMed, and EMBASE was performed up to November 2015. Eligible randomized controlled trials (RCTs) of different chemotherapy regimens were included...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28079179/transcriptome-and-network-analyses-in-saccharomyces-cerevisiae-reveal-that-amphotericin-b-and-lactoferrin-synergy-disrupt-metal-homeostasis-and-stress-response
#16
Chi Nam Ignatius Pang, Yu-Wen Lai, Leona T Campbell, Sharon C-A Chen, Dee A Carter, Marc R Wilkins
Invasive fungal infections are difficult to treat. The few available antifungal drugs have problems with toxicity or efficacy, and resistance is increasing. To overcome these challenges, existing therapies may be enhanced by synergistic combination with another agent. Previously, we found amphotericin B (AMB) and the iron chelator, lactoferrin (LF), were synergistic against a range of different fungal pathogens. This study investigates the mechanism of AMB-LF synergy, using RNA-seq and network analyses. AMB treatment resulted in increased expression of genes involved in iron homeostasis and ATP synthesis...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078813/host-defense-peptide-derived-privileged-scaffolds-for-anti-infective-drug-discovery
#17
Ersilia Nigro, Irene Colavita, Daniela Sarnataro, Olga Scudiero, Aurora Daniele, Francesco Salvatore, Antonello Pessi
'Privileged scaffolds' are molecular frameworks which have been successfully exploited for small molecule drug discovery. Peptide privileged scaffolds, featuring a strictly conserved multiple-disulfide framework and high variability in the rest of the sequence, display a broad range of biological effects, including antimicrobial and antiviral activity. Unlike small molecules, however, the cost of manufacturing these peptides is high, and their synthesis challenging. We previously described a simplified privileged scaffold corresponding to the γ-core of human β-defensin-3 (HBD3)...
January 12, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28078787/targeting-nasopharyngeal-carcinoma-by-artesunate-through-inhibiting-akt-mtor-and-inducing-oxidative-stress
#18
Qin Li, Wei Ni, Zhifeng Deng, Minghe Liu, Lazhi She, Qiong Xie
Drug repurposing has become an alternative therapeutic strategy for cancer treatment given the known pharmacokinetics and toxicity. The inhibitory effects of artesunate have been reported in various cancers. In this work, we investigated the effects of artesunate in nasopharyngeal carcinoma (NPC). We demonstrate that artesunate significantly inhibits proliferation via arresting NPC cells at G2/M phase. It also induces apoptosis through caspase-dependent and mitochondria-independent pathways in multiple NPC cell lines...
January 11, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28078119/surgical-outcomes-of-post-chemoradiotherapy-unresectable-locally-advanced-rectal-cancers-improve-with-interim-chemotherapy-is-folfirinox-better-than-capox
#19
Vikas Ostwal, Reena Engineer, Anant Ramaswamy, Arvind Sahu, Saurabh Zanwar, Suprita Arya, Supriya Chopra, Munita Bal, Prachi Patil, Ashwin Desouza, Avanish Saklani
BACKGROUND: Role of chemotherapy in patients who continue to have unresectable disease after pre-operative chemo-radiotherapy (CRT) remains largely unaddressed. METHODS: Patients with LA rectal cancer from January 2013 to June 2015 were evaluated. Post-CRT, patients, who were deemed unresectable, were considered for further interim chemotherapy (i-CT). RESULTS: Seventy six patients (15%) with median age of 38.5 years received i-CT after CRT...
December 2016: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28077781/effects-of-an-unusual-poison-identify-a-lifespan-role-for-topoisomerase-2-in-saccharomyces-cerevisiae
#20
Gregory Tombline, Jonathan I Millen, Bogdan Polevoda, Matan Rapaport, Bonnie Baxter, Michael Van Meter, Matthew Gilbertson, Joe Madrey, Gary A Piazza, Lynn Rasmussen, Krister Wennerberg, E Lucile White, John L Nitiss, David S Goldfarb
A progressive loss of genome maintenance has been implicated as both a cause and consequence of aging. Here we present evidence supporting the hypothesis that an age-associated decay in genome maintenance promotes aging in Saccharomyces cerevisiae (yeast) due to an inability to sense or repair DNA damage by topoisomerase 2 (yTop2). We describe the characterization of LS1, identified in a high throughput screen for small molecules that shorten the replicative lifespan of yeast. LS1 accelerates aging without affecting proliferative growth or viability...
January 5, 2017: Aging
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