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https://www.readbyqxmd.com/read/28093200/postoperative-serum-thioredoxin-concentrations-correlate-with-delirium-and-cognitive-dysfunction-after-hip-fracture-surgery-in-elderly-patients
#1
Xiao-Min Wu, Wei-Cai Xu, Yong-Jian Yu, Liang Han, Jun Zhang, Li-Jiao Yang
BACKGROUND: Oxidative stress correlates with occurrence and development of postoperative delirium (POD) and cognitive dysfunction (POCD). Thioredoxin (TRX) is a potent anti-oxidant and its circulating concentrations reflect extent of brain injury. We determined the relation of serum TRX concentrations to POD and POCD in elderly patients undergoing hip fracture surgery. METHODS: In this prospective, observatory study, TRX concentrations in preoperative and postoperative serum from 192 patients and serum from 192 controls were measured using an enzyme-linked immunosorbent assay...
January 13, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28087409/thioredoxin-a-novel-biomarker-of-post-injury-sepsis
#2
Jesper Eriksson, Andreas Gidlöf, Mikael Eriksson, Emma Larsson, Olof Brattström, Anders Oldner
BACKGROUND: Thioredoxin (TRX), an endogenous anti-oxidant protein induced in inflammatory conditions, has been shown to increase in plasma and to be associated with outcome in septic patients. This biomarker has never been studied in a trauma setting. We hypothesized that TRX would be increased after trauma and associated with post-injury sepsis. METHODS: Single-centre prospective observational study conducted at the intensive care unit (ICU) at the Karolinska University Hospital, Stockholm, Sweden, a level-1 trauma centre...
January 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28075401/anti-neuroblastoma-properties-of-a-recombinant-sunflower-lectin
#3
Marcela Pinedo, Melanie Genoula, María Ximena Silveyra, André De Oliveira Carvalho, Mariana Regente, Marianela Del Río, Júlia Ribeiro Soares, Valdirene Moreira Gomes, Laura De La Canal
According to their sugar recognition specificity, plant lectins are proposed as bioactive proteins with potential in cancer treatment and diagnosis. Helja is a mannose-specific jacalin-like lectin from sunflower which was shown to inhibit the growth of certain fungi. Here, we report its recombinant expression in a prokaryotic system and its activity in neurobalstoma cells. Helja coding sequence was fused to the pET-32 EK/LIC, the enterokinase/Ligation-independent cloning vector and a 35 kDa protein was obtained in Escherichia coli representing Helja coupled to thioredoxin (Trx)...
January 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28063949/vitamin-d-supplementation-inhibits-oxidative-stress-and-upregulate-sirt1-ampk-glut4-cascade-in-high-glucose-treated-3t3l1-adipocytes-and-in-adipose-tissue-of-high-fat-diet-fed-diabetic-mice
#4
Prasenjit Manna, Arunkumar E Achari, Sushil K Jain
This study examined the hypothesis that vitamin-D prevents oxidative stress and upregulates glucose metabolism via activating insulin-independent signaling molecules in 3T3-L1 adipocytes and in high fat diet (HFD)-fed mice. To investigate the mechanism 3T3L1 adipocytes were treated with high glucose (HG, 25 mM) and 1,25(OH)2D3 (1,25-dihydroxyvitamin D3) (0-50 nM). Results showed that 1,25(OH)2D3 supplementation decreased NOX4 expression, ROS production, NF-κB phosphorylation, and increased the expression of Nrf2 and Trx in HG-treated cells...
January 4, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28063347/disruption-of-redox-catalytic-functions-of-peroxiredoxin-thioredoxin-complex-in-mycobacterium-tuberculosis-h37rv-using-small-interface-binding-molecules
#5
Arun Bahadur Gurung, Amit Kumar Das, Atanu Bhattacharjee
Mycobacterium tuberculosis has distinctive ability to detoxify various microbicidal superoxides and hydroperoxides via a redox catalytic cycle involving thiol reductants of peroxiredoxin (Prx) and thioredoxin (Trx) systems which has conferred on it resistance against oxidative killing and survivability within host. We have used computational approach to disrupt catalytic functions of Prx-Trx complex which can possibly render the pathogen vulnerable to oxidative killing in the host. Using protein-protein docking method, we have successfully constructed the Prx-Trx complex...
December 31, 2016: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28056070/screening-expression-purification-and-functional-characterization-of-novel-antimicrobial-peptide-genes-from-hermetia-illucens-l
#6
Osama Elhag, Dingzhong Zhou, Qi Song, Abdul Aziz Soomro, Minmin Cai, Longyu Zheng, Ziniu Yu, Jibin Zhang
Antimicrobial peptides from a wide spectrum of insects possess potent microbicidal properties against microbial-related diseases. In this study, seven new gene fragments of three types of antimicrobial peptides were obtained from Hermetia illucens (L), and were named cecropinZ1, sarcotoxin1, sarcotoxin (2a), sarcotoxin (2b), sarcotoxin3, stomoxynZH1, and stomoxynZH1(a). Among these genes, a 189-basepair gene (stomoxynZH1) was cloned into the pET32a expression vector and expressed in the Escherichia coli as a fusion protein with thioredoxin...
2017: PloS One
https://www.readbyqxmd.com/read/28028022/multiple-myeloma-cells-capacity-to-decompose-h2o2-determines-lenalidomide-sensitivity
#7
Sinto Sebastian, Yuan X Zhu, Esteban Braggio, Chang-Xin Shi, Sonali C Panchabhai, Scott A Van Wier, Greg J Ahmann, Marta Chesi, P Leif Bergsagel, A Keith Stewart, Rafael Fonseca
Lenalidomide is an immunomodulatory drug (IMiDs) with clinical efficacy in multiple myeloma (MM) and other late B-cell neoplasms. Although cereblon (CRBN) is an essential requirement for IMiD action, the complete molecular and biochemical mechanisms responsible for lenalidomide-mediated sensitivity or resistance remain unknown. Here, we report that IMiDs work primarily via inhibition of peroxidase-mediated intracellular H2O2 decomposition in MM cells. MM cells with lower H2O2-decomposition capacity were more vulnerable to lenalidomide-induced H2O2 accumulation and associated cytotoxicity...
December 27, 2016: Blood
https://www.readbyqxmd.com/read/28017778/rhoa-s-nitrosylation-as-a-regulatory-mechanism-influencing-endothelial-barrier-function-in-response-to-g-bacterial-toxins
#8
F Chen, Y Wang, R Rafikov, S Haigh, W B Zhi, S Kumar, P T Doulias, O Rafikova, H Pillich, T Chakraborty, R Lucas, A V Verin, J D Catravas, J X She, S M Black, D J R Fulton
Disruption of the endothelial barrier in response to Gram positive (G(+)) bacterial toxins is a major complication of acute lung injury (ALI) and can be further aggravated by antibiotics which stimulate toxin release. The integrity of the pulmonary endothelial barrier is mediated by the balance of disruptive forces such as the small GTPase RhoA, and protective forces including endothelium-derived nitric oxide (NO). How NO protects against the barrier dysfunction is incompletely understood and our goal was to determine whether NO and S-nitrosylation can modulate RhoA activity and whether this mechanism is important for G(+) toxin-induced microvascular permeability...
December 22, 2016: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28017611/regulation-of-differentiation-of-nitrogen-fixing-bacteria-by-microsymbiont-targeting-of-plant-thioredoxin-s1
#9
Carolina Werner Ribeiro, Fabien Baldacci-Cresp, Olivier Pierre, Marie Larousse, Sofiane Benyamina, Annie Lambert, Julie Hopkins, Claude Castella, Julie Cazareth, Geneviève Alloing, Eric Boncompagni, Jérémy Couturier, Peter Mergaert, Pascal Gamas, Nicolas Rouhier, Françoise Montrichard, Pierre Frendo
Legumes associate with rhizobia to form nitrogen (N2)-fixing nodules, which is important for plant fitness [1, 2]. Medicago truncatula controls the terminal differentiation of Sinorhizobium meliloti into N2-fixing bacteroids by producing defensin-like nodule-specific cysteine-rich peptides (NCRs) [3, 4]. The redox state of NCRs influences some biological activities in free-living bacteria, but the relevance of redox regulation of NCRs in planta is unknown [5, 6], although redox regulation plays a crucial role in symbiotic nitrogen fixation [7, 8]...
December 19, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/28013349/pharmacology-and-toxicology-of-the-novel-investigational-agent-cantrixil-trx-e-002-1
#10
REVIEW
Muhammad Wasif Saif, Andrew Heaton, Kimberley Lilischkis, James Garner, David M Brown
PURPOSE: Recurrent, chemo-resistant ovarian cancer is thought to be due to a subgroup of slow-growing, drug-resistant cancer cells with stem-like properties and a high capacity for tumour repair. Cantrixil targets this sub-population of cells and is being developed as an intraperitoneal therapy to be used as first-line therapy in combination with carboplatin for epithelial ovarian cancer. The studies presented here justify further development. METHODS: A GLP dog CV study using a 4 × 4 Latin Square Crossover study was conducted using telemetric ECG recordings from dogs post IP administration to assess for cardiac abnormalities...
December 24, 2016: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28011872/functional-significance-of-nadph-thioredoxin-reductase-c-in-the-antioxidant-defense-system-of-cyanobacterium-anabaena-sp-pcc-7120
#11
Shoko Mihara, Keisuke Yoshida, Akiyoshi Higo, Toru Hisabori
The redox regulation system is widely accepted as a crucial mechanism for controlling the activities of various metabolic enzymes. In addition to thioredoxin reductase/thioredoxin cascades, NADPH-thioredoxin reductase C (NTRC), a hybrid protein formed by an NADPH-thioredoxin reductase domain and a thioredoxin (Trx) domain, is present in chloroplasts and in most cyanobacteria species. Although several target proteins and physiological functions of NTRC in chloroplasts have been characterized, little is known about NTRC functions in cyanobacteria...
December 22, 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28003361/thioredoxin-1-selectively-activates-transglutaminase-2-in-the-extracellular-matrix-of-the-small-intestine-implications-for-celiac-disease
#12
Nicholas M Plugis, Brad A Palanski, Chih-Hisang Weng, Megan Albertelli, Chaitan Khosla
Transglutaminase 2 (TG2) catalyzes transamidation or deamidation of its substrates and is ordinarily maintained in a catalytically inactive state in the intestine and other organs. Aberrant TG2 activity is thought to play a role in celiac disease, suggesting that a better understanding of TG2 regulation could help to elucidate the mechanistic basis of this malady. Structural and biochemical analysis has led to the hypothesis that extracellular TG2 activation involves reduction of an allosteric disulfide bond by thioredoxin-1 (TRX), but cellular and in vivo evidence for this proposal is lacking...
December 21, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27994500/resveratrol-alleviate-hypoxic-pulmonary-hypertension-via-anti-inflammation-and-anti-oxidant-pathways-in-rats
#13
Dunquan Xu, Yan Li, Bo Zhang, Yanxia Wang, Yi Liu, Ying Luo, Wen Niu, Mingqing Dong, Manling Liu, Haiying Dong, Pengtao Zhao, Zhichao Li
Resveratrol, a plant-derived polyphenolic compound and a phytoestrogen, was shown to possess multiple protective effects including anti-inflammatory response and anti-oxidative stress. Hypoxic pulmonary hypertension (HPH) is a progressive disease characterized by sustained vascular resistance and marked pulmonary vascular remodeling. The exact mechanisms of HPH are still unclear, but inflammatory response and oxidative stress was demonstrated to participate in the progression of HPH. The present study was designed to investigate the effects of resveratrol on HPH development...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27993994/development-of-a-novel-therapeutic-vaccine-carrier-that-sustains-high-antibody-titers-against-several-targets-simultaneously
#14
Falk Saupe, Matthias Reichel, Elisabeth J M Huijbers, Julia Femel, Per-Olof Markgren, C Evalena Andersson, Sebastian Deindl, U Helena Danielson, Lars T Hellman, Anna-Karin Olsson
With the aim to improve the efficacy of therapeutic vaccines that target self-antigens, we have developed a novel fusion protein vaccine on the basis of the C-terminal multimerizing end of the variable lymphocyte receptor B (VLRB), the Ig equivalent in jawless fishes. Recombinant vaccines were produced in Escherichia coli by fusing the VLRB sequence to 4 different cancer-associated target molecules. The anti-self-immune response generated in mice that were vaccinated with VLRB vaccines was compared with the response in mice that received vaccines that contained bacterial thioredoxin (TRX), previously identified as an efficient carrier...
December 19, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27993729/modulation-of-signaling-mechanisms-in-the-heart-by-thioredoxin-1
#15
REVIEW
Narayani Nagarajan, Shinichi Oka, Junichi Sadoshima
Myocardial ischemia/reperfusion and heart failure are the major cardiac conditions in which an imbalance between oxidative stress and anti-oxidant mechanisms is observed. The myocardium has endogenous reducing mechanisms, including the thioredoxin (Trx) and glutathione systems, that act to scavenge reactive oxygen species (ROS) and reduce oxidized proteins. The Trx system consists of Trx, Trx reductase (TrxR), and an electron donor, NADPH, where Trx is maintained in a reduced state in the presence of TrxR and NADPH...
December 16, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27991779/rotational-dynamics-of-diazabicyclo-2-2-2-octane-in-isomorphous-halogen-bonded-co-crystals-entropic-and-enthalpic-effects
#16
Luca Catalano, Salvador Perez-Estrada, Hsin-Hua Wang, Anoklase J-L Ayitou, Saeed I Khan, Giancarlo Terraneo, Pierangelo Metrangolo, Stuart Brown, Miguel A Garcia-Garibay
Based on rotational dynamics measurements carried out with isomorphic co-crystals formed by halogen-bonding (XB) between tritylacetylene halides (TrX) and diazabicyclo[2.2.2]octane (dabco), we were able to distinguish the sources of the enthalpic and entropic components in the rotational free energy barrier. We describe the formation of the 1:1 co-crystals (TrX···N(R)3N) obtained from 1 equiv of dabco and 1 equiv of either TrI or TrBr, respectively, to give 4a and 4b instead of the potential 2:1 complexes...
January 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27983767/sulforaphane-improves-neuronal-mitochondrial-function-in-brain-tissue-in-acute-carbon-monoxide-poisoning-rats
#17
Mingjun Bi, Qin Li, Dadong Guo, Xiaoyu Ding, Weikang Bi, Yueheng Zhang, Yong Zou
Carbonmonoxide (CO) poisoning is one of the leading causes of toxicity-related mortality and morbidity worldwide, primarily manifested by acute and delayed central nervous system (CNS) injuries and other organ damages. However, its definite pathogenesis is poorly understood. The aim of the present study was to explore the pathogenesis of the ultrastructural and functional impairment of mitochondria and the protection of sulforaphane (SFP) at different dosages on hippocampus neurons in rats after exposure to CO...
December 16, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27977895/a-soluble-form-of-psgl-1-requires-nrf2-signaling-to-protect-liver-transplant-endothelial-cells-against-ischemia-reperfusion-injury
#18
Cheng Zhang, Yu Zhang, Yuanxing Liu, Yuan Liu, Shoichi Kageyama, Xiu-da Shen, Feng Gao, Shusen Zheng, Ronald W Busuttil, Gray D Shaw, Haofeng Ji, Jerzy W Kupiec-Weglinski
Liver endothelial cell (LEC) damage is essential in the pathogenesis of ischemia-reperfusion injury (IRI) in transplant recipients. We analyzed the mechanism of LEC resistance against IRI by using a novel recombinant soluble form of PSGL-1 (Tandem P-Selectin Glycoprotein Ligand-Immunoglobulin; TSGL-Ig) in a mouse model of hepatic cold preservation (4°C in UW for 20h) and syngeneic orthotopic liver transplantation (OLT). Unlike in controls, TSGL-Ig protected OLT against IR-stress, evidenced by depressed sALT levels, well-preserved hepatic architecture, and improved survival (42% vs...
December 15, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27971418/effectiveness-of-the-trx-suspension-trainer-in-people-with-osteoarthritis
#19
P Tardi, A Tóvári, S Gitta, M Palancsa, I Boncz, M Hock
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27940305/thioredoxins-play-a-crucial-role-in-dynamic-acclimation-of-photosynthesis-in-fluctuating-light
#20
Ina Thormählen, Arkadius Zupok, Josephin Rescher, Jochen Leger, Stefan Weissenberger, Julia Groysman, Anne Orwat, Gilles Chatel-Innocenti, Emmanuelle Issakidis-Bourguet, Ute Armbruster, Peter Geigenberger
Sunlight represents the energy source for photosynthesis and plant growth. When growing in the field, plant photosynthesis has to manage strong fluctuations in light intensities. Regulation based on the thioredoxin (Trx) system is believed to ensure light-responsive control of photosynthetic reactions in the chloroplast. However, direct evidence for a role of this system in regulating dynamic acclimation of photosynthesis in fluctuating conditions is largely lacking. In this report we show that the ferredoxin-dependent Trxs m1 and m2 as well as the NADPH-dependent NTRC are both indispensable for photosynthetic acclimation in fluctuating light intensities...
January 9, 2017: Molecular Plant
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