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Liyuan Chai, Huan Li, Zhihui Yang, Xiaobo Min, Qi Liao, Yi Liu, Shuhui Men, Yanan Yan, Jixin Xu
Here, we aim to determine the distribution, ecological risk and sources of heavy metals and metalloids in the surface sediments of the Xiangjiang River, Hunan Province, China. Sixty-four surface sediment samples were collected in 16 sites of the Xiangjiang River, and the concentrations of ten heavy metals and metalloids (Mn, Zn, Cr, V, Pb, Cu, As, Ni, Co, and Cd) in the sediment samples were investigated using an inductively coupled plasma mass spectrometer (ICP-MS) and an atomic fluorescence spectrophotometer (AFS), respectively...
October 19, 2016: Environmental Science and Pollution Research International
Tripti Pandey, Rohit Shukla, Harish Shukla, Amit Sonkar, Timir Tripathi, Arvind Kumar Singh
Peroxides are one of the most important radicals that cause oxidative stress. Certain Glutathione S-transferases (GSTs) have been reported to show peroxidase activity. We report a novel peroxidase activity of Synechocystis GST- sll1545. The recombinant protein was purified to homogeneity and characterized. Low Km (0.109μM) and high Vmax (0.663μmol.min(-1)) values suggest a high preference of sll1545 for cumenehydroperoxide. Disc inhibition assay confirmed the ability of the enzyme to protect cells against peroxide-induced damage...
October 16, 2016: International Journal of Biological Macromolecules
Yunpeng Wang, Lei Chen, Weiwen Zhang
BACKGROUND: 3-hydroxypropionic acid (3-HP) is an important platform chemical with a wide range of applications. In our previous study, the biosynthetic pathway of 3-HP was constructed and optimized in cyanobacterium Synechocystis sp. PCC 6803, which led to 3-HP production directly from CO2 at a level of 837.18 mg L(-1) (348.8 mg/g dry cell weight). As the production and accumulation of 3-HP in cells affect cellular metabolism, a better understanding of cellular responses to 3-HP synthesized internally in Synechocystis will be important for further increasing 3-HP productivity in cyanobacterial chassis...
2016: Biotechnology for Biofuels
Bin Zhang, Shijia Li, Chuanjun Zhuo, Meng Li, Adam Safron, Axel Genz, Wen Qin, Chunshui Yu, Martin Walter
BACKGROUND: Major depressive disorder (MDD) is a highly prevalent psychiatric condition in which patients often have difficulties regulating their emotions. Prior studies have shown that attention bias towards negative emotion is linked to activation in regions of the default mode network (DMN) in MDD individuals. Furthermore, MDD patients showed increased resting-state functional connectivity (FC) between the medial prefrontal cortex and other DMN structures. METHODS: Twenty-one MDD patients that currently experiencing depressive episodes and twenty-five healthy control participants performed the current emotional expectancy paradigm in a gradient-echo SENSE-SPIRAL fMRI...
October 7, 2016: Journal of Affective Disorders
Stephanie Noble, Dustin Scheinost, Emily S Finn, Xilin Shen, Xenophon Papademetris, Sarah C McEwen, Carrie E Bearden, Jean Addington, Bradley Goodyear, Kristin S Cadenhead, Heline Mirzakhanian, Barbara A Cornblatt, Doreen M Olvet, Daniel H Mathalon, Thomas H McGlashan, Diana O Perkins, Aysenil Belger, Larry J Seidman, Heidi Thermenos, Ming T Tsuang, Theo G M van Erp, Elaine F Walker, Stephan Hamann, Scott W Woods, Tyrone D Cannon, R Todd Constable
Recent years have witnessed an increasing number of multisite MRI functional connectivity (fcMRI) studies. While multisite studies are an efficient way to speed up data collection and increase sample sizes, especially for rare clinical populations, any effects of site or MRI scanner could ultimately limit power and weaken results. Little data exists on the stability of functional connectivity measurements across sites and sessions. In this study, we assess the influence of site and session on resting state functional connectivity measurements in a healthy cohort of traveling subjects (8 subjects scanned twice at each of 8 sites) scanned as part of the North American Prodrome Longitudinal Study (NAPLS)...
October 13, 2016: NeuroImage
Karinne Saucedo-Vence, Armando Elizalde-Velázquez, Octavio Dublán-García, Marcela Galar-Martínez, Hariz Islas-Flores, Nely SanJuan-Reyes, Sandra García-Medina, María Dolores Hernández-Navarro, Leobardo Manuel Gómez-Oliván
Sucralose (SUC) is an artificial sweetener that is now widely used in North American and Europe; it has been detected in a wide variety of aquatic environments. It is considered safe for human consumption but its effects in the ecosystem have not yet been studied in depth, since limited ecotoxicological data are available in the peer-reviewed literature. This study aimed to evaluate potential SUC-induced toxicological hazard in the blood, brain, gill, liver and muscle of Cyprinus carpio using oxidative stress biomarkers...
October 13, 2016: Science of the Total Environment
Wei Xiong, Gaozhong Shen, Donald A Bryant
The genome of the model cyanobacterium, Synechococcus sp. PCC 7002, encodes two paralogs of CruA-type lycopene cyclases, SynPCC7002_A2153 and SynPCC7002_A0043, which are denoted cruA and cruP, respectively. Unlike the wild-type strain, a cruA deletion mutant is light-sensitive, grows slowly, and accumulates lycopene, γ-carotene, and 1-OH-lycopene; however, this strain still produces β-carotene and other carotenoids derived from it. Expression of cruA from Synechocystis sp. PCC 6803 (cruA 6803) in Escherichia coli strains that synthesize either lycopene or γ-carotene did not lead to the synthesis of either γ-carotene or β-carotene, respectively...
October 14, 2016: Photosynthesis Research
Bradley W Abramson, Benjamin Kachel, David M Kramer, Daniel C Ducat
In plants, a limited capacity to utilize or export the end products of the Calvin Benson cycle (CB) from photosynthetically-active source cells to non-photosynthetic sink cells can result in reduced carbon capture, photosynthetic electron transport (PET) and lowered photochemical efficiency. The downregulation of photosynthesis caused by reduced capacity to utilize photosynthate has been termed "sink limitation". Recently, several cyanobacterial and algal strains engineered to over-produce target metabolites have exhibited increased photochemistry suggesting possible source-sink regulatory mechanisms may be involved...
October 13, 2016: Plant & Cell Physiology
Tarek Assi, Elie El Rassy, Tony Ibrahim, Tania Moussa, Aline Tohme, Fadi El Karak, Fadi Farhat, Salma Faddoul, Marwan Ghosn, Joseph Kattan
INTRODUCTION: One major health care issue encountered in elderly cancer patients is the alteration of the quality of life. The purpose of our study is to evaluate the administration of chemotherapy in the last month of life (CLML) and to evaluate the impact of the palliative care consult (PCC) in the elderly patients. METHODS: We conducted a retrospective observational study that included elderly patients diagnosed with an end-stage cancer and who were deceased between the 1st of January 2012 and the 31st of December 2015...
October 13, 2016: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
François Trompier, Marion Baumann, Lleonard Barrios, Eric Gregoire, Michael Abend, Elizabeth Ainsbury, Stephen Barnard, Joan Francesc Barquinero, Juan Antonio Bautista, Beata Brzozowska, Jose Perez-Calatayud, Cinzia De Angelis, Inmaculada Domínguez, Valeria Hadjidekova, Ulrike Kulka, Juan Carlos Mateos, Roberta Meschini, Octávia Monteiro Gil, Jayne Moquet, Ursula Oestreicher, Alegria Montoro Pastor, Roel Quintens, Natividad Sebastià, Sylwester Sommer, Orlin Stoyanov, Hubert Thierens, Georgia Terzoudi, Juan Ignacio Villaescusa, Anne Vral, Andrzej Wojcik, Demetre Zafiropoulos, Laurence Roy
PURPOSE: In the frame of the QA program of RENEB, an inter-laboratory comparison (ILC) of calibration sources used in biological dosimetry was achieved to investigate the influence of calibration practices and protocols on the results of the dose estimation performance as a first step to harmonization and standardization of dosimetry and irradiation practices in the European biological dosimetry network. MATERIALS AND METHODS: Delivered doses by irradiation facilities used by RENEB partners were determined with EPR/alanine dosimetry system...
October 13, 2016: International Journal of Radiation Biology
Kazuyoshi Murata, Sayuri Hagiwara, Yoshitaka Kimori, Yasuko Kaneko
Some cyanobacteria exhibit compaction of DNA in synchrony with their circadian rhythms accompanying cell division. Since the structure is transient, it has not yet been described in detail. Here, we successfully visualize the ultrastructure of compacted DNA in the cyanobacterium Synechococcus elongatus PCC 7942 under rigorous synchronized cultivation by means of high-voltage cryo-electron tomography. In 3D reconstructions of rapidly frozen cells, the compacted DNA appears as an undulating rod resembling a eukaryotic condensed chromosome...
October 12, 2016: Scientific Reports
Shumyla Jabeen, Irfan Robbani, Naseer A Choh, Obaid Ashraf, Feroze Shaheen, Tariq Gojwari, Sabeeha Gul
OBJECTIVE: To characterize biliary abnormalities seen in portal cavernoma cholangiopathy (PCC) on Magnetic Resonance Cholangiopancreaticography(MRCP) and elucidate certain salient features of the disease by collaborating our findings with those of previous studies. METHODS: We prospectively enrolled 52 patients with portal cavernoma secondary to idiopathic Extrahepatic portal vein obstruction(EHPVO) who underwent a standard MRCP protocol. Images were analysed for abnormalities involving the entire biliary tree...
October 12, 2016: British Journal of Radiology
Leah D McGurn, Maryam Moazami-Goudarzi, Sean A White, Tannu Suwal, Beant Brar, Jason Q Tang, George S Espie, Matthew S Kimber
CcaA is a b-carbonic anhydrase that is a component of the carboxysomes of a subset of b-cyanobacteria. This protein, which has a characteristic C-terminal extension of unknown function, is recruited to the carboxysome via interactions with CcmM, which is itself a γ-carbonic anhydrase homolog with enzymatic activity in many, but not all cyanobacteria. We have determined the structure of CcaA from Synechocystis sp. PCC 6803 at 1.45 Å. In contrast to the dimer of dimers organization of most bacterial β-carbonic anhydrases, or the loose dimer-of-dimers-of-dimers organization found in the plant enzymes, CcaA shows a well-packed trimer-of-dimers organization...
October 11, 2016: Biochemical Journal
Rajesha K Nairy, Narayana Yerol, Nagesh N Bhat, Utkarsha Desai, Kapil Shirsath, Usha Yadav, Rajesh K Chaurasia, Sapra B K
OBJECTIVE: In the present study an attempt was made to estimate coefficients of dose response curves for PCC aberrations induced by CalyculinA and Okadaic acid, using(60)Co gamma radiation and 8 MeV pulsed electron beam for biodosimetry application. MATERIALS AND METHODS: The modified method outlined by Puig et al. 2013 was used to conduct Calyculin A and Okadaic acid induced PCC assay in human blood lymphocytes.Chemical treatment was given for the last 1 h of a 48 h culture...
October 7, 2016: Journal of Occupational Health
Jun Ke, Feng Chen, Rongfeng Qi, Qiang Xu, Yuan Zhong, Lida Chen, Jianjun Li, Li Zhang, Guangming Lu
Post-traumatic stress disorder (PTSD) is associated with alterations in regional brain activation and remote functional connectivity (FC) in limbic and prefrontal cortex. However, little is known about local FC changes following a traumatic event. Resting-state functional magnetic resonance images were collected for typhoon survivors with (n = 27) and without PTSD (n = 33), and healthy controls (n = 30). Local FC was examined by calculating regional homogeneity (ReHo), and remote FC was investigated between regions showing significant ReHo group differences...
October 8, 2016: Brain Imaging and Behavior
Robert J Zalenski, Spencer S Jones, Cheryl Courage, Denise R Waselewsky, Anna S Kostaroff, David Kaufman, Afzal Beemath, John Bronfman, James W Castillo, Hicham Krayem, Anthony Marinelli, Bradley Milner, Maria Teresa Palleschi, Mona Tareen, Sheri Testani, Ayman Soubani, Julie Walch, Judy Wheeler, Sonali Wilborn, Hanna Granovsky, Robert D Welch
CONTEXT: There are few multi-center studies that examine the impact of systematic screening for palliative care and specialty consultation in the ICU. OBJECTIVE: To determine the outcomes of receiving palliative care consultation (PCC) for patients who screened positive on palliative care referral criteria. METHODS: In a prospective quality assurance intervention with a retrospective analysis, the covariate balancing propensity score method was utilized to estimate the conditional probability of receiving a PCC and to balance important covariates...
October 5, 2016: Journal of Pain and Symptom Management
Alexander Klotz, Jens Georg, Lenka Bučinská, Satoru Watanabe, Viktoria Reimann, Witold Januszewski, Roman Sobotka, Dieter Jendrossek, Wolfgang R Hess, Karl Forchhammer
The molecular and physiological mechanisms involved in the transition of microbial cells from a resting state to the active vegetative state are critically relevant for solving problems in fields ranging from microbial ecology to infection microbiology. Cyanobacteria that cannot fix nitrogen are able to survive prolonged periods of nitrogen starvation as chlorotic cells in a dormant state. When provided with a usable nitrogen source, these cells re-green within 48 hr and return to vegetative growth. Here we investigated the resuscitation of chlorotic Synechocystis sp...
October 5, 2016: Current Biology: CB
Chieh-Kai Chan, Yu-Lin Tsai, Yi-Ling Chan, Meng-Yang Chang
A new, four-step synthetic route for substituted 2,3-benzodiazepines 1, starting from aldehyde 4, was developed with excellent overall yields. This route was carried out by the 1,2-addition of 4 with various aromatic Grignard reagents, PCC-oxidation, and aerobic Wacker-type oxidation of the olefinic group of 6, followed by condensation of the resulting 1,5-dicarbonyl 7 with N2H4. Isoquinolones 9 were obtained when an aldehyde group was used instead of a ketone. The key structures were confirmed by X-ray single crystal diffraction analysis...
October 7, 2016: Journal of Organic Chemistry
N Appleby, E Groarke, M Crowley, F A Wahab, A M McCann, L Egan, D Gough, G McMahon, D O'Donghaile, D O'Keeffe, N O'Connell
BACKGROUND: Real-world studies of the emergency reversal of warfarin using 4-factor prothrombin complex concentrate (PCC) report unwarranted delays. The delay to receiving PCC was ≥ 8 h in 46·7% of patients with warfarin-associated bleeding (PWAB) treated with a variable PCC dosing protocol in our retrospective audit. OBJECTIVE: To report the impact of a simplified PCC dosing protocol on the interval to reversal of anticoagulation. METHODS: We developed a PCC dosing protocol standardising the initial PCC dose and simplifying dosing calculations...
October 7, 2016: Transfusion Medicine
Ying Cui, Xia Liang, Hong Gu, Yuzheng Hu, Zhen Zhao, Xiang-Yu Yang, Cheng Qian, Yihong Yang, Gao-Jun Teng
To explore the effect of T2DM on cerebral perfusion, and the relationship between cerebral perfusion changes and cognitive impairment as well as diabetic variables, by using a whole-brain arterial spin-labeling (ASL) MRI technique. This prospective study was approved by the local institutional review board and was performed between November 2012 and October 2013. All subjects provided informed consent. Forty T2DM patients and 41 age-, sex- and education-matched healthy controls were included. Cerebral blood flow (CBF) map was obtained by pulsed ASL perfusion imaging at 3 T MRI...
October 6, 2016: Brain Imaging and Behavior
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