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https://www.readbyqxmd.com/read/28738659/sample-treatment-in-m%C3%A3-ssbauer-spectroscopy-for-protein-related-analyses-nondestructive-possibilities-to-look-inside-metal-containing-biosystems
#1
Alexander A Kamnev, Anna V Tugarova
In this review, the unique possibilities are considered of the (57)Fe transmission (TMS) and (57)Co emission (EMS) variants of Mössbauer (nuclear γ-resonance) spectroscopy as nondestructive techniques with minimal sample preparation/treatment and a significant analytical potential, with a focus on the analysis of cation-binding sites in metalloproteins. The techniques are shown to provide unique structural and quantitative information on the coordination microenvironment, the chemical state and transformations of the Mössbauer nuclides in sophisticated metal-containing proteins, including those within complicated supramolecular structures, and in microbial cells or tissues...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738651/recent-advances-in-sample-pre-treatment-for-emerging-methods-in-proteomic-analysis
#2
María Ramos-Payán, Juan A Ocaña-González, Rut M Fernández-Torres, Santiago Maspoch, Miguel Ángel Bello-López
The objective of proteomics is the study of proteins (including their structure elucidation, the characterization of their role in biochemical process, the detection and identification of anomalous modifications in their structures and behavior, etc.) from both a qualitative and quantitative point of view. These studies have to face several difficulties as (a) the intrinsic complexity of protein molecules, (b) the low concentrations of the studied proteins, (c) the complexity of the biological samples (which could lead to interferences from the components of these matrixes), etc...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738642/terminal-protection-mediated-autocatalytic-cascade-amplification-coupled-with-graphene-oxide-fluorescence-switch-for-sensitive-and-rapid-detection-of-folate-receptor
#3
Rui Wang, Xiaowen Xu, Pei Li, Yan Wang, Wei Jiang
Folate receptor (FR) is over-expressed in most human tumors and has been regarded as biomarker and therapeutic target. Specific and sensitive detection of FR is essential for tumor treatment and drug development. Here, a specific, sensitive and rapid FR detection strategy was proposed based on terminal protection-mediated autocatalytic cascade amplification coupled with graphene oxide fluorescence switch. Firstly, the specific binding of FR to the folate terminally-labeled on a primary trigger DNA (PT-DNA) could protect the PT-DNA from exonuclease I degradation, converting FR detection to PT-DNA detection...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738615/electrochemical-magneto-immunosensor-based-on-endogenous-%C3%AE-galactosidase-enzyme-to-determine-enterotoxicogenic-escherichia-coli-f4-k88-in-swine-feces-using-square-wave-voltammetry
#4
Lorena Viviana Tarditto, María Alicia Zon, Hugo García Ovando, Nelio Roberto Vettorazzi, Fernando Javier Arévalo, Héctor Fernández
Diseases caused by enterotoxicogenic Escherichia coli F4 (K88) (ETEC F4) are a problem in swine production establishments. Due to the high rate of mortality and morbidity of E. coli infections, a rapid and accurate diagnosis is important in order to choose an appropriate treatment to reduce the economic impact. Therefore, an electrochemical magneto-immunosensor (EMI) was developed to detect and quantify ETEC F4 in swine feces samples through a direct non-competitive immunoassay. ETEC F4 was selectively captured by immunomagnetic separation...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738590/extracellular-matrix-characterization-in-plaques-from-carotid-endarterectomy-by-a-proteomics-approach
#5
N Ucciferri, S Rocchiccioli, L Comelli, M Marconi, M Ferrari, G Pelosi, A Cecchettini
Extracellular matrix (ECM) is a fundamental component of multicellular organisms. Alteration of its structure and/or molecular composition are associated with several pathologies, among the others with atherosclerosis. To determine how the overall ECM architecture of a tissue as complex as the atheroma may change under varying pathological conditions constitutes a great technical challenge. This entails removing cell components and solubilisation of fibrillar proteins in order to allow enzymatic digestion and mass spectrometry analyses...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738567/application-of-thermoresponsive-hydrogel-gold-nanorods-composites-in-the-detection-of-diquat
#6
Caiyun Jiang, Xiaoyuan Ma, Maoyun Xue, Hong-Zhen Lian
Gallic acid (GA) was employed as a reducing agent for facile in situ preparation of gold nanorods (GNRs) in thermoresponsive P(NIPAM-NVP) hydrogel films. Based on the surface-enhanced Raman scattering (SERS) effect of GNRs and the enrichment effect of thermoresponsive hydrogel film on test molecules through a shrinkage process, the obtained P(NIPAM-NVP)/GNRs composites have been used as SERS substrate for the rapid detection of diquat. The influences of substrate pre-treatment, laser wavelength, and sample treatment method on diquat determination have been investigated comprehensively...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738565/zwitterionic-hydrophilic-interaction-liquid-chromatography-tandem-mass-spectrometry-with-hybridspe-precipitation-for-the-determination-of-intact-cisplatin-in-human-plasma
#7
Feifan Xie, Pieter Colin, Jan Van Bocxlaer
Cisplatin is a first-line chemotherapeutic for the treatment of a wide variety of cancers since its discovery in the 1960s. Although various techniques have been reported for the measurement of total platinum in biological matrices, such as inductively coupled plasma-mass spectrometry and derivatization procedures, a specific, sensitive and robust assay for the quantification of intact cisplatin is still lacking. Therefore, we present a rapid, selective, sensitive, and reliable UHPLC-MS/MS based method for the determination of intact cisplatin in human plasma in support of a Phase II clinical trial...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738563/urinary-volatile-fingerprint-based-on-mass-spectrometry-for-the-discrimination-of-patients-with-lung-cancer-and-controls
#8
Álvaro García Ramos, Ana Pérez Antón, Miguel Del Nogal Sánchez, José Luis Pérez Pavón, Bernardo Moreno Cordero
Profile signals of urine samples corresponding to patients with lung cancer and controls were obtained using a non-separative methodology. The method is based on the coupling of a headspace sampler, a programed temperature vaporizer and a mass spectrometer (HS-PTV-MS). With only a centrifugation step as prior sample treatment, the samples were subjected to the headspace generation process and the volatiles generated were introduced into the PTV where they were trapped in the Tenax® packed liner while the solvent was purged...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738551/biomass-saccharification-is-largely-enhanced-by-altering-wall-polymer-features-and-reducing-silicon-accumulation-in-rice-cultivars-harvested-from-nitrogen-fertilizer-supply
#9
Zahoor, Dan Sun, Ying Li, Jing Wang, Yuanyuan Tu, Yanting Wang, Zhen Hu, Shiguang Zhou, Lingqiang Wang, Guosheng Xie, Jianliang Huang, Aftab Alam, Liangcai Peng
In this study, two rice cultivars were collected from experimental fields with seven nitrogen fertilizer treatments. All biomass samples contained significantly increased cellulose contents and reduced silica levels, with variable amounts of hemicellulose and lignin from different nitrogen treatments. Under chemical (NaOH, CaO, H2SO4) and physical (hot water) pretreatments, biomass samples exhibited much enhanced hexoses yields from enzymatic hydrolysis, with high bioethanol production from yeast fermentation...
July 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28738550/employing-microbial-electrochemical-technology-driven-electro-fenton-oxidation-for-the-removal-of-recalcitrant-organics-from-sanitary-landfill-leachate
#10
Muhammad Hassan, Narcis Pous, Bing Xie, Jesús Colprim, M Dolors Balaguer, Sebastia Puig
The feasibility of employing Microbial Electrochemical Technology (MET)-driven electro-Fenton oxidation was evaluated as a post-treatment of an anammox system treating sanitary landfill leachate. Two different MET configuration systems were operated using effluent from partial nitrification-anammox reactor treating mature leachate. In spite of the low organic matter biodegradability of the anammox's effluent (2401±562mgCODL(-1); 237±57mgBOD5L(-1)), the technology was capable to reach COD removal rates of 1077-1244mgL(-1)d(-1) with concomitant renewable electricity production (43...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28738545/municipal-wastewater-treatment-via-co-immobilized-microalgal-bacterial-symbiosis-microorganism-growth-and-nutrients-removal
#11
Yu Shen, Jingqing Gao, Linshuai Li
A symbiotic microalgal-bacterial system may be an optional technology for wastewater treatment. In this study, co-immobilized of a bacterium isolated from a municipal wastewater treatment plant (Pseudomonas putida) and a microalgae Chlorella vulgaris was used in the study of cell growth and nutrient removal during wastewater treatment under batch and continuous culture conditions. Under batch culture conditions, co-immobilization treatment significantly increased the cell density of C. vulgaris and P. putida compared with other treatments...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28738542/protective-effects-of-tannic-acid-on-acute-doxorubicin-induced-cardiotoxicity-involvement-of-suppression-in-oxidative-stress-inflammation-and-apoptosis
#12
Jianping Zhang, Lijing Cui, Xue Han, Yuanyuan Zhang, Xuan Zhang, Xi Chu, Fenghua Zhang, Ying Zhang, Li Chu
Doxorubicin (DOX) is a highly effective drug, but its cardiotoxicity restricts its therapeutic index. Oxidative stress is the major etiopathological factor in DOX-induced cardiotoxicity. Tannic acid (TA) has various anti-cancer, antioxidant, and anti-inflammatory activities. The purpose of the study was to survey the possible effects of TA against acute DOX-induced cardiotoxicity. Male Sprague-Dawleyrats were randomly divided into five groups: control, DOX (10mg/kg) alone, DOX with TA (20 and 40mg/kg), or DOX withcaptopril (30mg/kg) treatments...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738541/research-progress-on-osteoarthritis-treatment-mechanisms
#13
REVIEW
Yun-Yao Gu, Jian Chen, Zhu-Long Meng, Wan-Yu Ge, Yang-Yang Bian, Shao-Wen Cheng, Chen-Kun Xing, Jiang-Ling Yao, Jian Fu, Lei Peng
Osteoarthritis is a common disease and is frequently encountered in the older population; the incidence rises sharply with age. It is estimated that more than 360 million people suffer from OA. However, the pathogenesis of osteoarthritis remains unclear, and we cannot effectively prevent the progression of OA. The aim of this review was to explore the molecular markers and signaling pathways that induce chondrocyte apoptosis in OA. We searched, using the key words osteoarthritis, chondrocyte apoptosis, autophagy, endoplasmic reticulum stress, molecular targets, and biomarkers, in PubMed, Web of Science, and Google Scholar from 1994 to 2017...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738539/lncrna-ab073614-regulates-proliferation-and-metastasis-of-colorectal-cancer-cells-via-the-pi3k-akt-signaling-pathway
#14
Yanan Wang, Haoyu Kuang, Jinfang Xue, Liya Liao, Fang Yin, Xiaojun Zhou
The expression profiles of long noncoding RNAs (lncRNAs) in colorectal cancer (CRC) have remained unclear. LncRNA AB073614 is known to be upregulated in ovarian cancer and glioma tissues, and is associated with the occurrence and progression of those cancers. In the present study, we investigated the lncRNA AB073614 gene expression patterns in CRC cell lines and tissue samples from CRC patients, and then analyzed them for possible associations with various clinicopathological characteristics. Furthermore, the roles played by lncRNA AB073614 in CRC cell proliferation, apoptosis, cell cycle progression, migration, and invasion were examined in vitro by using gene knockdown and overexpression techniques...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738538/diosmin-improved-cognitive-deficit-and-amplified-brain-electrical-activity-in-the-rat-model-of-traumatic-brain-injury
#15
Mohammad Ali Mirshekar, Hamed Fanaei, Fereshteh Keikhaei, Fatemeh Sargolzaee Javan
OBJECTIVE: Traumatic brain injury (TBI) is one of the main causes of intellectual and cognitive disabilities in humans. Clinically, it is essential to limit the progress of cognitive impairment after TBI. It is reported that diosmin has a neuroprotective effect that can limit the progress of the impairment. The aim of this study was to evaluate the effects of diosmin on neurological score, memory, tumor necrosis factor-α (TNF-α) level and long-term potentiation in hippocampal dentate gyrus after the injury...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738537/phosphodiesterase-inhibitor-ameliorates-neuronal-injury-in-spinal-cord-ischemia-reperfusion-injured-rat-model
#16
Xiao-Gang Chen, Fu Hua, Shou-Guo Wang, Yong-Yi Xu, Hai-Tao Yue
This study investigated the mechanisms responsible for the neuroprotective effect of sildenafil citrate (SFC) on ischemia-reperfusion spinal cord (SC) injuries. Balloon occlusion of the thoracic aorta was used to induce SC ischemia. The animals (n=30) were separated into three groups: sham, SC injury with saline, and SC injury with 5mg/kg i.p. SFC treatment (SFC). The Basso, Beattie, and Bresnahan (BBB) score was determined to assess neurological function at different time intervals after reperfusion. After 48h, histopathology of the SC was assessed by triphenyltetrazolium chloride (TTC) and Nissl staining...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738536/effect-of-apigenin-kaempferol-and-resveratrol-on-the-gene-expression-and-protein-secretion-of-tumor-necrosis-factor-alpha-tnf-%C3%AE-and-interleukin-10-il-10-in-raw-264-7-macrophages
#17
Marta Palacz-Wrobel, Paulina Borkowska, Monika Paul-Samojedny, Malgorzata Kowalczyk, Anna Fila-Danilow, Renata Suchanek-Raif, Jan Kowalski
Polyphenols such as apigenin, kaempferol or resveratrol are typically found in plants, including fruits, vegetables, herbs and spices, which have a wide range of biological functions such as antioxidative, anti-inflammatory, vasodilative, anticoagulative and proapoptotic. Discovering such multifunctional compounds in widely consumed plant-based products - ones that both inhibit the release of TNF-α from tissue macrophages and at the same time enhance the secretion of IL-10 - would be an important signpost in the quest for effective pharmacological treatment of numerous diseases that have an inflammatory etiology...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738535/role-of-gab1-pi3k-akt-signaling-high-glucose-induced-cardiomyocyte-apoptosis
#18
Dongmei Su, Yunjun Zhou, Shanshan Hu, Lina Guan, Cuige Shi, Qi Wang, Yingyu Chen, Cailing Lu, Qian Li, Xu Ma
Gestational diabetes mellitus (GDM) is a risk factor for abnormal heart development. Previous work showed that a decrease of myocardial cells and an increase of apoptotic cells leading to heart defects under hyperglycemia, and many genes and protein have been found to play important roles in cardiomyocyte apoptosis. However, there are still many blind nodes in HG-induced cardiac apoptosis. Our study showed that down-regulation of GAB1 occurred concurrently with HG-induced cardiomyocytes apoptosis and in the heart tissues of offspring of diabetic rats in vitro and in vivo...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738532/genipin-attenuates-cisplatin-induced-nephrotoxicity-by-counteracting-oxidative-stress-inflammation-and-apoptosis
#19
Eglal Mahgoub, Shanmugam Muthu Kumaraswamy, Kamal Hassan Kader, Balaji Venkataraman, Shreesh Ojha, Ernest Adeghate, Mohanraj Rajesh
Cisplatin (CP) is a potent and widely used chemotherapeutic agent. However, the clinical benefits of CP are compromised because it elicits nephrotoxicity and ototoxicity. In this study, we investigated the nephroprotective effects of the phytochemical genipin (GP) isolated from the gardenia (Gardenia jasminoides) fruit, using a murine model of CP-induced nephropathy. GP pretreatment attenuated the CP-induced renal tissue injury by diminishing the serum blood urea nitrogen, creatinine, and cystatin C levels, as well as those of kidney injury molecule-1...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738528/molecular-basis-for-oxidative-stress-induced-by-simulated-microgravity-in-nematode-caenorhabditis-elegans
#20
Li Zhao, Qi Rui, Dayong Wang
Caenorhabditis elegans is an important in vivo assay system for toxicological studies. Herein, we investigated the role of oxidative stress and the underlying molecular mechanism for induced adverse effects of simulated microgravity. In nematodes, simulated microgravity treatment induced a significant induction of oxidative stress. Genes (mev-1, gas-1, and isp-1) encoding a molecular machinery for the control of oxidative stress were found to be dysregulated in simulated microgravity treated nematodes. Meanwhile, genes (sod-2, sod-3, sod-4, sod-5, aak-2, skn-1, and gst-4) encoding certain antioxidant defense systems were increased in simulated microgravity treated nematodes...
July 19, 2017: Science of the Total Environment
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