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Toxic stress syndrome

Doc Mariano, D de Souza, D F Meinerz, J Allebrandt, A F de Bem, W Hassan, Oed Rodrigues, Jbt da Rocha
Acquired immunodeficiency syndrome (AIDS) is a worldwide disease characterized by impairments of immune function. AIDS can be associated with oxidative stress (OS) that can be linked to selenium (Se) deficiency. Se is fundamental for the synthesis of selenoproteins, such as glutathione peroxidase and thioredoxin reductase. These enzymes catalyze the decomposition of reactive oxygen species and contribute to maintain equilibrium in cell redox status. Literature data indicate that organoselenium compounds, such as ebselen and diphenyl diselenide, have antioxidant properties in vitro and in vivo models associated with OS...
October 24, 2016: Human & Experimental Toxicology
Die Dai, Yiqiao Gao, Jiaqing Chen, Yin Huang, Zunjian Zhang, Fengguo Xu
Lipopolysaccharide (LPS) can lead to uncontrollable cytokine production and eventually cause fatal sepsis syndrome. Individual toxicity difference of LPS has been widely reported. In our study we observed that two thirds of the rats (24/36) died at a given dose of LPS, while the rest (12/36) survived. Tracking the dynamic metabolic change in survival and non-survival rats in the early stage may reveal new system information to understand the inter-individual variation in response to LPS. As the time-resolved datasets are very complex and no single method can elucidate the problem clearly and comprehensively, the static and dynamic metabolomics methods were employed in combination as cross-validation...
October 3, 2016: Scientific Reports
Michael Rutter
Translational research focuses on innovation in healthcare settings, but this is a two-way process that may have implications for either treatment or prevention. Smoking and lung cancer and the fetal alcohol syndrome are used as examples. Experimental medicine that budges basic and clinical science often constitutes a key way forward. Areas of scientific progress and challenge are discussed in relation to drug action, social cognition, cognitive neuroscience, molecular genetics, gene-environment interaction, and epigenetics...
October 3, 2016: Development and Psychopathology
María Eugenia Orqueda, Marisa Rivas, Iris Catiana Zampini, María Rosa Alberto, Sebastian Torres, Soledad Cuello, Jorge Sayago, Samanta Thomas-Valdes, Felipe Jiménez-Aspee, Guillermo Schmeda-Hirschmann, María Inés Isla
The aim of this work was to assess the nutritional and functional components of powder obtained by lyophilization of whole fruits, seeds, pulp and skin from chilto (Solanum betaceum Cav) cultivated in the ecoregion of Yungas, Argentina. The powders have low carbohydrate and sodium content and are a source of vitamin C, carotenoid, phenolics, potassium and fiber. The HPLC-ESI-MS/MS analysis of the fractions enriched in phenolics allowed the identification of 12 caffeic acid derivatives and related phenolics, 10 rosmarinic acid derivatives and 7 flavonoids...
February 1, 2017: Food Chemistry
L Liu, D Zhang, J K Rodzinka-Pasko, Y-M Li
BACKGROUND: Autism spectrum disorders (ASD) are syndromes that are predominantly defined by behavioral features such as impaired social interactions, restricted verbal and nonverbal communication, and repetitive or stereotyped behavior. In the past few decades, the reported prevalence of ASD has increased dramatically. This growth can be partially explained by an increased level of awareness of the problem among professionals and better diagnostic methods. Nevertheless, underpinning causes of ASD have not yet been detailed and explained...
August 16, 2016: Der Nervenarzt
Yijia Guan, Nan Gao, Jinsong Ren, Xiaogang Qu
Alzheimer's disease (AD) is a complicated multifactorial syndrome. Lessons have been learned through failed clinical trials that targeting multiple key pathways of the AD pathogenesis is necessary to halt the disease progression. Here, we construct core-shell nanoparticles (CeNP@MnMoS4 ) targeting multiple key pathways of the AD pathogenesis, including elimination of toxic metal ions, decrease of oxidative stress, and promotion of neurite outgrowth. The SOD activity and copper removal capacity of CeNP@MnMoS4 -n (n represents the number of layers of MnMoS4 , n=1-5) was investigated in vitro...
October 4, 2016: Chemistry: a European Journal
S Maya, T Prakash, Krishna Das Madhu, Divakar Goli
Aluminium (Al) is the most common metal and widely distributed in our environment. Al was first isolated as an element in 1827, and its use began only after 1886. Al is widely used for industrial applications and consumer products. Apart from these it is also used in cooking utensils and in pharmacological agents, including antacids and antiperspirants from which the element usually enters into the human body. Evidence for the neurotoxicity of Al is described in various studies, but still the exact mechanism of Al toxicity is not known...
July 29, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Kitti Sárközi, András Papp, Edina Horváth, Zsuzsanna Máté, Edit Hermesz, Gábor Kozma, Zoltán Péter Zomborszki, Ildikó Kálomista, Gábor Galbács, Andrea Szabó
BACKGROUND: Inhalation of manganese-containing metal fumes at workplaces can cause central nervous damage including a Parkinson-like syndrome. Oxidative stress is likely to be involved in the pathomechanism, due to the presence of nano-sized metal oxide particles with high biological and chemical activity. Oxidative damage of the nervous system could be prevented or ameliorated by properly applied antioxidants; preferably natural ones such as green tea, a popular drink. The aim of this work was to see if orally applied green tea brew can diminish the functional neurotoxicity of manganese dioxide nanoparticles give into the airways of rats...
July 20, 2016: Journal of the Science of Food and Agriculture
Baikuntha Aryal, V Ashutosh Rao
Cardiolipin (CL) is an inner mitochondrial membrane phospholipid which plays an important role in mitochondrial function. Perturbation in CL biosynthesis alters mitochondrial bioenergetics causing a severe genetic disorder commonly known as Barth syndrome. Barth syndrome patients are known to have a reduced concentration and altered composition of CL. Cardiolipin is also known to have a high affinity for the chemotherapeutic agent doxorubicin (Dox), resulting in an extensive mitochondrial accumulation of the drug...
2016: PloS One
Jing-Qiong Kang, Robert L Macdonald
OBJECTIVE: In this review article, we focus on the molecular pathogenic basis for genetic generalized epilepsies associated with mutations in the inhibitory γ-aminobutyric acid (GABAA) receptor γ2 subunit gene, GABRG2 (OMIM 137164), an established epilepsy gene. OBSERVATIONS: The γ-aminobutyric acid (GABAA) receptor γ2 subunit gene, GABRG2, is abundantly expressed in the mammalian brain, and its encoded γ2 subunit is assembled into αβγ2 receptors, which are the major GABAA receptor isoforms in the brain...
August 1, 2016: JAMA Neurology
Michael S Goligorsky
No abstract text is available yet for this article.
July 20, 2016: Antioxidants & Redox Signaling
Jurjan Aman, Ester M Weijers, Geerten P van Nieuw Amerongen, Asrar B Malik, Victor W M van Hinsbergh
Despite considerable progress in the understanding of endothelial barrier regulation and the identification of approaches that have the potential to improve endothelial barrier function, no drug- or stem cell-based therapy is presently available to reverse the widespread vascular leak that is observed in acute respiratory distress syndrome (ARDS) and sepsis. The translational gap suggests a need to develop experimental approaches and tools that better mimic the complex environment of the microcirculation in which the vascular leak develops...
August 1, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
Siobhan M Scullion, Claudine Hahn, Karolina Tyka, Peter R Flatt, Neville H McClenaghan, Sigurd Lenzen, Ewa Gurgul-Convey
Homocysteine (HC) is considered to play an important role in the development of metabolic syndrome complications. Insulin-producing cells are prone to HC toxicity and this has been linked to oxidative stress. However, the exact mechanisms remain unknown. Therefore it was the aim of this study to determine the nature of reactive oxygen species responsible for HC toxicity. Chronic exposure of RINm5F and INS1E insulin-producing cells to HC decreased cell viability and glucose-induced insulin secretion in a concentration-dependent manner and led to a significant induction of hydrogen peroxide generation in the cytosolic, but not the mitochondrial compartment of the cell...
August 25, 2016: Chemico-biological Interactions
Montserrat Rojo de la Vega, Matthew Dodson, Christine Gross, Heidi Manzour, R Clark Lantz, Eli Chapman, Ting Wang, Stephen M Black, Joe G N Garcia, Donna D Zhang
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are the clinical manifestations of severe lung damage and respiratory failure. Characterized by severe inflammation and compromised lung function, ALI/ARDS result in very high mortality of affected individuals. Currently, there are no effective treatments for ALI/ARDS, and ironically, therapies intended to aid patients (specifically mechanical ventilation, MV) may aggravate the symptoms. Key events contributing to the development of ALI/ARDS are: increased oxidative and proteotoxic stresses, unresolved inflammation, and compromised alveolar-capillary barrier function...
April 2016: Current Pharmacology Reports
Stefanie Groepper, Jerome Schlue, Claudia Haferlach, Aristoteles Giagounidis
BACKGROUND: Iron overload is a common problem in patients with primary myelofibrosis and anemia due to transfusion dependency. This results in organ damage and toxic effects on hematopoietic cells in the bone marrow. At present, iron chelation therapy is not recommended in patients with myeloproliferative syndromes. CASE REPORT: We describe a very interesting development in a patient with primary myelofibrosis receiving iron chelation. Transfusion independency and a nearly complete histological remission of the underlying disease occurred within a few weeks of therapy...
2016: Oncology Research and Treatment
Daniela Dinu, Chun Chu, Alex Veith, Krithika Lingappan, Xanthi Couroucli, Colin R Jefcoate, Nader Sheibani, Bhagavatula Moorthy
Supplemental oxygen, which is routinely administered to preterm infants with pulmonary insufficiency, contributes to bronchopulmonary dysplasia (BPD) in these infants. Hyperoxia also contributes to the development of acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) in adults. The mechanisms of oxygen-mediated pulmonary toxicity are not completely understood. Recent studies have suggested an important role for cytochrome P450 (CYP)1A1/1A2 in the protection against hyperoxic lung injury...
August 5, 2016: Biochemical and Biophysical Research Communications
Marco Capolupo, Paola Valbonesi, Alisar Kiwan, Sara Buratti, Silvia Franzellitti, Elena Fabbri
The occurrence of caffeine (CF), a biologically active drug, has widely been documented in coastal waters, and whether its environmental concentrations do represent a threat for marine organisms is unclear. The present study aimed at assessing sub-lethal effects induced by a 7-day exposure to environmentally relevant concentrations of CF (5, 50 and 500ng/L) in the Mediterranean mussel, Mytilus galloprovincialis. CF in water and mussel tissues, and a battery of biomarkers, including lysosomal parameters of general stress, oxidative stress responses and endpoints of neurological and genetic damages, were evaluated and tested for significance vs controls (p<0...
September 1, 2016: Science of the Total Environment
Sakhila K Banu, Jone A Stanley, Kirthiram K Sivakumar, Joe A Arosh, Robert C Burghardt
Resveratrol (RVT), a polyphenolic component in grapes and red wine, has been known for its cytoprotective actions against several diseases. However, beneficial effects of RVT against early exposure to endocrine disrupting chemicals (EDCs) have not been understood. EDCs are linked to several ovarian diseases such as premature ovarian failure, polycystic ovary syndrome, early menopause and infertility in women. Hexavalent chromium (CrVI) is a heavy metal EDC, and widely used in >50 industries. Environmental contamination with CrVI in the US is rapidly increasing, predisposing the human to several illnesses including cancers and still birth...
July 15, 2016: Toxicology and Applied Pharmacology
Hye Jin Hwang, Peter Dornbos, Michelle Steidemann, Taylor K Dunivin, Mike Rizzo, John J LaPres
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor within the Per-Arnt-Sim (PAS) domain superfamily. Exposure to the most potent AHR ligand, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), is associated with various pathological effects including metabolic syndrome. While research over the last several years has demonstrated a role for oxidative stress and metabolic dysfunction in AHR-dependent TCDD-induced toxicity, the role of the mitochondria in this process has not been fully explored...
August 1, 2016: Toxicology and Applied Pharmacology
Iris Mangas, Jorge Estevez, Eugenio Vilanova
OPs are a large diverse class of chemicals used for several purposes (pesticides, warfare agents, flame retardants, etc.). They can cause several neurotoxic disorders: acute cholinergic toxicity, organophosphorus-induced delayed neuropathy, long-term neurobehavioral and neuropsychological symptoms, and potentiation of neuropathy. Some of these syndromes cannot be fully understood with known molecular targets. Many enzyme systems have the potential to interact with OPs. Since the discovery of neuropathy target esterase (NTE), the esterases that hydrolyze phenyl valerate (PVases) have been of interest...
April 14, 2016: Chemico-biological Interactions
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