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https://www.readbyqxmd.com/read/29778465/roles-for-selenium-and-selenoprotein-p-in-the-development-progression-and-prevention-of-intestinal-disease
#1
REVIEW
Sarah P Short, Jennifer M Pilat, Christopher S Williams
Selenium (Se) is a micronutrient essential to human health, the function of which is mediated in part by incorporation into a class of proteins known as selenoproteins (SePs). As many SePs serve antioxidant functions, Se has long been postulated to protect against inflammation and cancer development in the gut by attenuating oxidative stress. Indeed, numerous studies over the years have correlated Se levels with incidence and severity of intestinal diseases such as inflammatory bowel disease (IBD) and colorectal cancer (CRC)...
May 17, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29778398/antipsychotic-induced-disorders-reported-cases-and-prospective-study-on-muscle-biomarkers-after-high-exposure-to-haloperidol
#2
Abderrezak Khelfi, Mohammed Azzouz, Rania Abtroun, Mohammed Reggabi, Berkahoum Alamir
Antipsychotic drugs are known to induce neuromuscular effects. In this study, we review 13 years (2002-2014) of antipsychotic intoxications reported by the anti-poisoning center of Algiers (APCA). The most recorded symptoms were neuromuscular/muscular disorders, of which haloperidol was the most inducer among all antipsychotics. A prospective study was conducted between December 2012 and January 2017 to evaluate muscle effects generated after intentional or accidental ingestion of haloperidol. Fifty-one patients admitted in different emergency departments in Algiers were included in this study...
May 17, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29777993/toenail-selenium-genetic-variation-in-selenoenzymes-and-risk-and-outcome-in-glioma
#3
Noah C Peeri, Jordan H Creed, Gabriella M Anic, Reid C Thompson, Jeffrey J Olson, Renato V LaRocca, Sajeel A Chowdhary, John D Brockman, Travis A Gerke, L Burton Nabors, Kathleen M Egan
BACKGROUND: Selenium is an essential trace element obtained through diet that plays a critical role in DNA synthesis and protection from oxidative damage. Selenium intake and polymorphisms in selenoproteins have been linked to the risk of certain cancers though data for glioma are sparse. METHODS: In a case-control study of glioma, we examined the associations of selenium in toenails and genetic variants in the selenoenzyme pathway with the risk of glioma and patient survival...
May 16, 2018: Cancer Epidemiology
https://www.readbyqxmd.com/read/29775743/redox-regulation-of-protein-kinase-c-by-selenometabolites-and-selenoprotein-thioredoxin-reductase-limits-cancer-prevention-by-selenium
#4
REVIEW
Rayudu Gopalakrishna, Usha Gundimeda, Sarah Zhou, Bui Helena, Arne Holmgren
The cancer-preventive mechanism of selenium should address the way low concentrations of selenometabolites react with cellular targets without being diffused from the sites of generation, the way selenium selectively kills tumor cells, and the intriguing U-shaped curve that is seen with dietary supplementation of selenium and cancer prevention. Protein kinase C (PKC), a receptor for tumor promoters, is well suited for this mechanism. Due to the catalytic redox cycle, low concentrations of methylselenol, a postulated active metabolite of selenium, react with the tumor-promoting lipid hydroperoxide bound to PKC to form methylseleninic acid (MSA), which selectively reacts with thiol residues present within the vicinity of the PKC catalytic domain to inactivate it...
May 15, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29775719/the-characteristics-and-antioxidation-of-oudemansiella-radicata-selenium-polysaccharides-on-lipopolysaccharide-induced-endo-toxemic-mice
#5
Zheng Gao, Chen Zhang, Hui Liu, Yongfa Zhu, Zhenzhen Ren, Huijuan Jing, Shangshang Li, Jianjun Zhang, Xingtian Liu, Le Jia
The selenium polysaccharides (SPS) by Oudemansiella radicata were isolated, and two hydrolysates (enzymatic-SPS (ESPS) and acidic-SPS (ASPS)) were obtained by enzymolysis and acidolysis. The endo-toxemic-induced lung and kidney damages were successfully established by the lipopolysaccharides (LPS) injection (5 mg/kg/d). The in vivo mice experiments indicated that the ESPS showed superior antioxidant and protective effects against the LPS-toxicities by increasing the antioxidant activities, reducing lipid peroxidation, improving the inflammatory response and elevating the kidney and lung functions than SPS and ASPS...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29774513/coordinated-effects-of-lead-toxicity-and-nutrient-deprivation-on-growth-oxidative-status-and-elemental-composition-of-primed-and-non-primed-rice-seedlings
#6
Fahad Khan, Saddam Hussain, Mohsin Tanveer, Sehrish Khan, Hafiz Athar Hussain, Biland Iqbal, Mingjian Geng
Rice crop is highly susceptible to the toxic levels of lead (Pb) during early growth stages. Moreover, a sufficient availability of mineral nutrients is critical for survival of plants particularly under stressful conditions. An experiment was carried out to unravel the coordinated effects of Pb stress (1-mM PbCl2 ) and different nutrient treatments (sufficient nutrient supply, nitrogen (N) deprivation, phosphorus (P) deprivation, and potassium (K) deprivation) on morphological growth, reactive oxygen species (ROS), antioxidants, and nutrient status in primed and non-primed rice seedlings...
May 17, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29773477/selenium-bioaccumulation-and-associated-nutraceutical-properties-in-calocybe-indica-mushroom-cultivated-on-se-enriched-wheat-straw
#7
Himanshi Rathore, Abhishek Sharma, Shalinee Prasad, Satyawati Sharma
Calocybe indica was cultivated on wheat straw enriched with various concentrations of sodium selenite (Na2 SeO3 ), (2.5-40 μg/ml). The content of selenium (Se) in fruit bodies increased linearly by increasing the amount of Na2 SeO3 , although the biomass yield inhibited above 5 μg/ml. The fruit bodies accumulated inorganic Se into organic forms by integrating the Se into proteins (56%-68%), polysaccharides (22%-29%), and nucleic acids (1.4%-2.7%). Maximum protein content (25.31 g/100 g) was observed in fruit bodies harvested from the substrate enriched with 10 μg/ml Se...
May 15, 2018: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29773192/total-content-and-in-vitro-bioaccessibility-of-tellurium-in-brazil-nuts
#8
Otávio Berenguel, Gustavo de S Pessôa, Marco A Z Arruda
Alongside the Brazil nut's role as an excellent source of vitamins, oil, fatty acids, lipids and nutrients, it is also recognized as a rich source of selenium. The pathway along which selenium and sulfur are metabolized in plants is theorized to be the same as that used for tellurium. Total tellurium content and its bioaccessibility are then evaluated by ICP-MS. Interferences and sample preparation are evaluated for the accurate determination of tellurium, and the accuracy determined through analysis of the certified reference material 1643e...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29773186/association-between-cadmium-and-androgen-receptor-protein-expression-differs-in-prostate-tumors-of-african-american-and-european-american-men
#9
Christine M Neslund-Dudas, Russell B McBride, Ashoka Kandegedara, Benjamin A Rybicki, Oleksandr N Kryvenko, Dhananjay Chitale, Nilesh Gupta, Sean R Williamson, Craig G Rogers, Carlos Cordon-Cardo, Andrew G Rundle, Albert M Levin, Q Ping Dou, Bharati Mitra
Cadmium is a known carcinogen that has been implicated in prostate cancer, but how it affects prostate carcinogenesis in humans remains unclear. Evidence from basic science suggests that cadmium can bind to the androgen receptor causing endocrine disruption. The androgen receptor is required for normal prostate development and is the key driver of prostate cancer progression. In this study, we examined the association between cadmium content and androgen receptor protein expression in prostate cancer tissue of African American (N = 22) and European American (N = 30) men...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29773181/mercury-and-selenium-in-fishes-from-the-tapaj%C3%A3-s-river-in-the-brazilian-amazon-an-evaluation-of-human-exposure
#10
A S Lino, D Kasper, Y S Guida, J R Thomaz, O Malm
This work aimed to evaluate associated risks of fish consumption to human health, concerning mercury (Hg) and selenium (Se) concentrations in fish species largely consumed in the Tapajós River basin in the Brazilian Amazon. Total mercury (THg), methylmercury (MeHg) and Se concentrations were measured in 129 fish specimens from four sites of the Tapajós River basin. Estimated daily intake (EDI) of Hg and Se were reported regarding fish consumption. EDI were compared with the reference value of provisional tolerable daily intake proposed by the World Health Organization (WHO)...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772226/potential-role-of-peroxisome-proliferator-activated-receptor-gamma-activation-on-serum-visfatin-and-trace-elements-in-high-fat-diet-induced-type-2-diabetes-mellitus
#11
Arshia Tabassum, Syeda Nuzhat Fatima Zaidi, Kausar Yasmeen, Tabassum Mahboob
AIMS: Electrolytes and trace elements dysregulation play an important role in the progression of obesity and diabetes complications. The present study was designed to evaluate the insulin sensitizing effects of peroxisomes proliferators activated receptor gamma (PPAR-γ) agonist on trace elements in obesity induced type 2 diabetes mellitus and correlate with serum visfatin. MATERIALS AND METHODS: Wistar rats were categorized into five groups. Group I served as control; Group II fed on high fat diet (HFD); Group III fed on HFD and treated with rosiglitazone (3 mg/kg) for 7 days; Group IV were T2DM rats induce by HFD and low dose of streptozotocin (i...
May 14, 2018: Life Sciences
https://www.readbyqxmd.com/read/29771529/copper-catalyzed-sulfenylation-sulfonylation-and-selenylation-of-2-3-allenoic-acids-with-disulfides-or-diselenides
#12
Ya-Xun Xin, Shen Pan, Yangen Huang, Xiu-Hua Xu, Feng-Ling Qing
The efficient copper-catalyzed sulfenylation and selenylation of 2,3-allenoic acids with disulfides or diselenides were developed, respectively. These reactions proceeded through tandem radical addition/intramolecular cyclization processes, affording a series of 4-sulfenylated and 4-selenylated butenolides in moderate to excellent yields. Moreover, 4-sulfonylated butenolides could be also obtained by sulfenylation of 2,3-allenoic acids and subsequent oxidation. Further transformation of the sulfur- and selenium-containing butenolides afforded the corresponding furan derivatives in good yields...
May 17, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29771500/rational-design-of-cancer-targeted-selenadiazole-derivative-as-efficient-radiosensitizer-for-precise-cancer-therapy
#13
Delong Zeng, Shulin Deng, Chengcheng Sang, Jianfu Zhao Zhao, Tianfeng Chen
Chemical drug design based on the biochemical characteristics of cancer cells has become an important strategy for discovery of targeted therapies for personalized cancer medicine. Herein, cancer targeting RGD peptide has been covalently conjugated to selenadiazole derivative (RGD-SeD) to improve its cancer selectivity. The RGD decoration significantly enhances the anticancer efficacy of RGD-SeD in αVβ3 integrin-overexpressing HepG2 liver cancer cells, but not in normal liver cells. Cellular uptake assay and fluorescent imaging confirmed the selectivity of RGD-SeD to integrin overexpressing cancer cells...
May 17, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29770949/selenium-ameliorates-afb-1-induced-excess-apoptosis-in-chicken-splenocytes-through-death-receptor-and-endoplasmic-reticulum-pathways
#14
Jing Fang, Panpan Zhu, Zhuangzhi Yang, Xi Peng, Zhicai Zuo, Hengmin Cui, Ping Ouyang, Gang Shu, Zhengli Chen, Chao Huang, Wentao Liu
Aflatoxin B1 (AFB1 ) can cause hepatotoxicity, genotoxicity, and immunosuppressive effects for a variety of organisms. Selenium (Se), as an essential nutrient element, plays important protective effects against cell apoptosis induced by AFB1 . This research aimed to reveal the ameliorative effects of selenium on AFB1 -induced excess apoptosis in chicken splenocytes through death receptor and endoplasmic reticulum pathways in vivo. Two hundred sixteen neonatal chickens, randomized into four treatments, were fed with basal diet (control treatment), 0...
May 16, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29770420/selenium-species-dependent-toxicity-bioavailability-and-metabolic-transformations-in-caenorhabditis-elegans
#15
Isabelle Rohn, Talke Anu Marschall, Nina Kroepfl, Kenneth Bendix Jensen, Michael Aschner, Simon Tuck, Doris Kuehnelt, Tanja Schwerdtle, Julia Bornhorst
The essential micronutrient selenium (Se) is required for various systemic functions, but its beneficial range is narrow and overexposure may result in adverse health effects. Additionally, the chemical form of the ingested selenium contributes crucially to its health effects. While small Se species play a major role in Se metabolism, their toxicological effects, bioavailability and metabolic transformations following elevated uptake are poorly understood. Utilizing the tractable invertebrate Caenorhabditis elegans allowed for an alternative approach to study species-specific characteristics of organic and inorganic Se forms in vivo, revealing remarkable species-dependent differences in the toxicity and bioavailability of selenite, selenomethionine (SeMet) and Se-methylselenocysteine (MeSeCys)...
May 17, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29769785/the-relevance-of-selenium-to-alopecias
#16
Violeta Duarte Tortelly Costa, Daniel Fernandes Melo, Andrea Mizuno Matsunaga
No abstract text is available yet for this article.
March 2018: International Journal of Trichology
https://www.readbyqxmd.com/read/29768886/morphology-of-cdse-based-coatings-formed-on-polyamide-substrate
#17
Vitalijus Janickis, Neringa Petrašauskienė, Skirma Žalenkienė, Inga Morkvėnaitė-Vilkončcienė, Arūnas Ramanavičcius
Cadmium selenide (CdSe)-based layers were formed on the surface of polyamide 6 (PA) substrate film by treating PA film samples with potassium selenotrithionate (K2SeS2O6) solution (seleniumization) and then with cadmium(II) acetate, Cd(CH3COO)2, solution (cadmiumization). The morphology of CdSe-based layers was investigated by atomic force and scanning electron microscopies. It was determined that the formation of CdSe-based layers proceeds unevenly in the form of islands, which later tends to agglomerate. Therefore the surface of the layers formed is relatively uneven and rather rough...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29767675/a-comparison-of-methods-for-adjusting-biomarkers-of-iron-zinc-and-selenium-status-for-the-effect-of-inflammation-in-an-older-population-a-case-for-interleukin-6
#18
Sue O MacDonell, Jody C Miller, Michelle J Harper, Malcolm R Reid, Jillian J Haszard, Rosalind S Gibson, Lisa A Houghton
Background: Older people are at risk of micronutrient deficiencies, which can be under- or overestimated in the presence of inflammation. Several methods have been proposed to adjust for the effect of inflammation; however, to our knowledge, none have been investigated in older adults in whom chronic inflammation is common. Objective: We investigated the influence of various inflammation-adjustment methods on micronutrient biomarkers associated with anemia in older people living in aged-care facilities in New Zealand...
May 14, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29766201/selenium-deficiency-inhibits-differentiation-and-immune-function-and-imbalances-the-th1-th2-of-dendritic-cells
#19
Zhepeng Sun, Zhe Xu, Dongxu Wang, Haidong Yao, Shu Li
Selenium (Se) deficiency inhibits immune cell differentiation, affects immune response, and leads to cellular and humoral immune dysfunction. However, the impact of Se deficiency on the differentiation and Th1/Th2 balance of dendritic cells is still unclear. In this study, we replicated a model of Se-deficient chickens by feeding the chickens with a low-Se diet (i.e., the content of Se is 0.008 mg per kg diet). On this basis, we explored the effect of Se deficiency on the differentiation of chicken dendritic cells by induction culture of peripheral blood monocyte cells...
May 16, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29764315/effects-of-egg-consumption-and-choline-supplementation-on-plasma-choline-and-trimethylamine-n-oxide-in-a-young-population
#20
Bruno S Lemos, Isabel Medina-Vera, Olga V Malysheva, Marie A Caudill, Maria Luz Fernandez
BACKGROUND: Plasma trimethylamine-N-oxide (TMAO) concentrations have been associated with cardiovascular disease risk. Eggs are a rich source of choline, which is a precursor of TMAO. OBJECTIVE: The effects of egg intake versus daily choline supplementation were evaluated on plasma choline and TMAO in a young, healthy population. METHODS: Thirty participants (14 males, 16 females; 25.6 ± 2.3 years; body mass index = 24.3 ± 2.9 kg/m2 ) were enrolled in this 13-week crossover intervention...
May 15, 2018: Journal of the American College of Nutrition
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