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https://www.readbyqxmd.com/read/29667814/resolving-confined-7-li-dynamics-of-uranyl-peroxide-capsule-u-24
#1
Jing Xie, Harrison A Neal, Jennifer Szymanowski, Peter C Burns, Todd M Alam, May Nyman, Laura Gagliardi
We obtained a kerosene-soluble form of the lithium salt [UO2 (O2 )(OH)2 ]24 phase (Li-U24 ), by adding cetyltrimethylammonium bromide surfactant to aqueous Li-U24 . Interestingly, its variable-temperature solution 7 Li NMR spectroscopy resolves two narrowly spaced resonances down to -10 °C, which shift upfield with increasing temperature, and finally coalesce at temperatures > 85 °C. Comparison with solid-state NMR demonstrates that the Li dynamics in the Li-U24 -CTA phase involves only exchange between different local encapsulated environments...
April 18, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29667777/induced-pluripotent-stem-cell-derived-conditional-medium-promotes-leydig-cell-anti-apoptosis-and-proliferation-via-autophagy-and-wnt-%C3%AE-catenin-pathway
#2
Xiaoling Guo, Yong Chen, Tingting Hong, Xianwu Chen, Yue Duan, Chao Li, Renshan Ge
Leydig cell transplantation is a better alternative in the treatment of androgen-deficient males. The main purpose of this study was to investigate the effects of induced pluripotent stem cell-derived conditioned medium (iPS-CM) on the anti-apoptosis, proliferation and function of immature Leydig cells (ILCs), and illuminate the underlying mechanisms. ILCs were exposed to 200 μmol/L hydrogen peroxide (H2 O2 ) for 24 hours with or without iPS-CM treatments. Cell apoptosis was detected by flow cytometric analysis...
April 18, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29667773/benzyl-isothiocyanate-attenuates-the-hydrogen-peroxide-induced-interleukin-13-expression-through-glutathione-s-transferase-p-induction-in-t-lymphocytic-leukemia-cells
#3
Yue Tang, Sho Naito, Naomi Abe-Kanoh, Seiji Ogawa, Shu Yamaguchi, Beiwei Zhu, Yoshiyuki Murata, Yoshimasa Nakamura
We investigated the effect of benzyl isothiocyanate (BITC) on the hydrogen peroxide-induced gene expression of a T-helper-2 cytokine, interleukin (IL)-13, in T lymphocytic leukemia Jurkat cells. The 24-h pretreatment of BITC significantly inhibited the IL-13 expression enhanced by hydrogen peroxide. Although the BITC pretreatment did not change the enhanced level of the phosphorylated c-Jun N-terminal kinase (JNK), it significantly inhibited the nuclear translocation of c-Jun induced by hydrogen peroxide. BITC also increased the protein expression of glutathione S-transferase (GST) isozymes, GSTP1/2, as well as the total GST activity...
April 18, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29667662/camel-milk-attenuates-methotrexate-induced-kidney-injury-via-activation-of-pi3k-akt-enos-signaling-and-intervention-with-oxidative-aberrations
#4
Hany H Arab, Samir A Salama, Ibrahim A Maghrabi
Methotrexate (MTX) is a classical chemotherapeutic agent with nephrotoxicity as the most disturbing adverse effect. So far, its underlying molecular mechanisms, particularly PI3K/Akt/eNOS transduction, are inadequately explored. Several antioxidant modalities have been characterized to ameliorate MTX-induced renal injury. In this regard, Camel milk (CM) is a natural product with recognized antioxidant and anti-inflammatory features. Thus, the current study aimed to investigate the potential ameliorating effects of CM in MTX-induced kidney injury in rats...
April 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29667408/a-redox-active-cobalt-ii-iii-metal-organic-framework-for-selective-oxidation-of-cyclohexene
#5
Tao Zhang, Yue-Qiao Hu, Tian Han, Yuan-Qi Zhai, Yan-Zhen Zheng
We report herein a new cobalt(II/III) mixed-valance metal-organic framework (MOF) fomulated as [CoIICo2III(μ3-O)(bdc)3(tpt)]•Guest 1, where bdc = benzene-1,4-dicarboxylate and tpt = 2,4,6-tri(4-pyridinyl)-1,3,5-triazine, can be used as a redox-active heterogeneous catalyst for selective oxidation of cyclohexene on the allylic position without destroying the adjacent double bond. Two oxidants were chosen to demonstrate this result. For using tert-butyl hydroperoxide, the conversion rate is 63 % and only allylic oxidation products (tert-butyl-2-cyclohexenyl-1-peroxide, 86 %; 2-cyclohexen-1-one, 14 %) are found...
April 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29667399/emissions-of-tetrachlorobiphenyls-pcbs-47-51-and-68-from-polymer-resin-on-kitchen-cabinets-as-a-non-aroclor-source-to-residential-air
#6
Nicholas J Herkert, Jacob C Jahnke, Keri C Hornbuckle
Both Aroclor and non-Aroclor sources of airborne polychlorinated biphenyls (PCBs) were found in residential homes. We deployed passive air samplers at 16 residences and found PCB-47, PCB-51, and PCB-68 to account for up to 50% of measured indoor ΣPCBs (2700 pg m-3 ). Although PCB-47 and PCB-51 are neurotoxins present in Aroclor mixtures (<2.5 and <0.3 wt %, respectively), we found them at much higher levels than expected for any Aroclor source. PCB-68 is not present in Aroclor mixtures. Another non-Aroclor congener, PCB-11, a byproduct of pigment manufacturing, was found inside and outside of every household and was frequently the predominate congener...
April 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29667128/epigallocatechin-3-gallate-protects-and-prevents-paraquat-induced-oxidative-stress-and-neurodegeneration-in-knockdown-dj-1-%C3%AE-drosophila-melanogaster
#7
Daniel A Martinez-Perez, Marlene Jimenez-Del-Rio, Carlos Velez-Pardo
Epigallocatechin-3-gallate (EGCG) is a polyhydroxyphenol constituent of green tea (e.g., Camellia sinensis) with known antioxidant properties. Due to these properties, others have proposed it as a potential therapeutic agent for the treatment of Parkinson's disease (PD). Previously, we demonstrated that EGCG prolonged the lifespan and locomotor activity in wild-type Canton-S flies exposed to the neurotoxicant paraquat (PQ), suggesting neuroprotective properties. Both gene mutations and environmental neurotoxicants (e...
April 17, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29667062/comparison-of-different-advanced-degradation-processes-for-the-removal-of-the-pharmaceutical-compounds-diclofenac-and-carbamazepine-from-liquid-solutions
#8
Andrea G Capodaglio, Anna Bojanowska-Czajka, Marek Trojanowicz
Carbamazepine and diclofenac are two examples of drugs with widespread geographical and environmental media proliferation that are poorly removed by traditional wastewater treatment processes. Advanced oxidation processes (AOPs) have been proposed as alternative methods to remove these compounds in solution. AOPs are based on a wide class of powerful technologies, including UV radiation, ozone, hydrogen peroxide, Fenton process, catalytic wet peroxide oxidation, heterogeneous photocatalysis, electrochemical oxidation and their combinations, sonolysis, and microwaves applicable to both water and wastewater...
April 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29666541/antiglycation-and-antioxidant-activities-of-mogroside-extract-from-siraitia-grosvenorii-swingle-fruits
#9
Hesheng Liu, Chengcheng Wang, Xiangyang Qi, Jian Zou, Zhida Sun
Siraitia grosvenorii (Swingle) is one kind of medical and edible plants with various health-promoting properties. Recently, its hypoglycemic and antidiabetic activities have been reported, but the underlying mechanism remains to be explored. The current study was aimed to investigate the antioxidant and antiglycation activities of mogroside extract (MGE) from Siraitia grosvenorii (Swingle). The results showed that compared to glycated BSA, MGE at middle (125 μg/mL) and high dose (500 μg/mL) significantly inhibited BSA glycation evidenced by decreased fluorescent AGEs formation, protein carbonyls and Nε -(carboxymethyl) lysine (CML) level at 500 μg/mL by 58...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666533/purple-head-broccoli-brassica-oleracea-l-var-italica-plenck-a-functional-food-crop-for-antioxidant-and-anticancer-potential
#10
Ashun Chaudhary, Sonika Choudhary, Upendra Sharma, Adarsh Pal Vig, Bikram Singh, Saroj Arora
Natural foods are used in many folks and household treatments and have immense potential to treat a serious complication and health benefits, in addition to the basic nutritional values. These food products improve health, delay the aging process, increase life expectancy, and possibly prevent chronic diseases. Purple head Brassica oleracea L. var. italica Plenck is one of such foods and in current studies was explored for chemical compounds at different development stages by gas chromatography-mass spectrometry...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666523/process-optimization-and-oxidative-stability-of-omega-3-ice-cream-fortified-with-flaxseed-oil-microcapsules
#11
Avinash Gowda, Vivek Sharma, Ankit Goyal, A K Singh, Sumit Arora
Microencapsulated flaxseed oil powder (MFOP) was supplemented for the fortification of α-linolenic acid (ALA, ω-3 fatty acid) in ice cream. Processing parameters were optimized in terms of the stage of homogenization of ice-cream mix, level of fortification (3, 4 and 5%) and flavors (vanilla, butter scotch and strawberry). Data revealed that free fatty acids increased significantly during first 15 days in all the samples and then remained constant. Peroxide value and thiobarbituric acid value first increased up to 30 and 45 days, respectively; and then decreased followed by a gradual increase up to 120 days...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666522/development-of-a-novel-colorimetric-sensor-based-on-alginate-beads-for-monitoring-rainbow-trout-spoilage
#12
Marjan Majdinasab, Seyed Mohammad Hashem Hosseini, Marziyeh Sepidname, Manizheh Negahdarifar, Peiwu Li
Alginate is a non-toxic, renewable, and linear copolymer obtained from the brown algae Laminaria digitata that can be easily shaped into beads. Its good gel forming properties have made it useful for entrapping food and pharmaceutical ingredients. In this study, alginate beads were used in a novel application as a colorimetric sensor in food intelligent packaging. Colorimetric sensor was developed through entrapping red cabbage extract as a pH indicator in alginate beads. The pH indicator beads were used in rainbow trout packaging for monitoring fillets spoilage...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666112/increased-erythrophagocytosis-induces-ferroptosis-in-red-pulp-macrophages-in-a-mouse-model-of-transfusion
#13
Lyla A Youssef, Abdelhadi Rebbaa, Sergey Pampou, Stuart P Weisberg, Brent R Stockwell, Eldad A Hod, Steven L Spitalnik
Macrophages play important roles in recycling iron derived from the clearance of red blood cells (RBCs). They are also a critically important component of host defense, protecting against invading pathogens. However, the effects on macrophage biology of acutely ingesting large numbers of RBCs are not completely understood. To investigate this issue, we used a mouse model of RBC transfusion and clearance, which mimics the clinical setting. In this model, transfusions of refrigerator storage-damaged (i.e., "old") RBCs led to increased erythrophagocytosis by splenic red pulp macrophages (RPMs)...
April 17, 2018: Blood
https://www.readbyqxmd.com/read/29666023/the-influence-of-lens-care-systems-on-eyelid-tissue-changes-during-silicone-hydrogel-contact-lens-wear
#14
Michel Guillon, Cécile Maissa, Stéphanie Wong, Trisha Patel, Renée Garofalo
PURPOSE: To compare the effects of a hydrogen peroxide (H2 O2 )-based lens care solution and a polyhexamethylene biguanide (PHMB) multi-purpose solution on the eyelids when used with silicone hydrogel (SiHy) contact lenses. METHODS: A total of 74 symptomatic wearers of ACUVUE® OASYS® (senofilcon A; n = 39) or PureVision® (balafilcon A; n = 35) contact lenses were randomised 1:1 to either CLEAR CARE® Cleaning & Disinfecting Solution or renu® fresh™ multi-purpose solution (n = 37 each)...
April 14, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29665769/sublethal-chronic-effects-of-oral-dietary-exposure-to-deltamethrin-in-swiss-albino-mice
#15
Anita Tewari, R S Banga, Jps Gill
The hazards of dietary exposure to environmentally relevant levels of deltamethrin are poorly understood though studies enunciate the acute toxicity hazards. In this study, prolonged exposure to low levels of deltamethrin in mice was investigated. The mice were exposed daily via gavage method for 60 days. Four doses (0.1, 0.05, 0.01, and 0.005 mg/kg bwt/d) were selected, which are equal to or less than the maximum residue limits for deltamethrin permitted in animal food/feed. Liver, kidney, lungs, spleen, and testes were collected on day 61 for histology, residue, and biochemical analysis (aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALKP), total bilirubin (TBIL), total proteins (TPs), cholesterol (CHOL), urea, and creatinine)...
January 1, 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29665635/a-mechanism-study-on-toxicity-of-graphene-oxide-to-daphnia-magna-direct-link-between-bioaccumulation-and-oxidative-stress
#16
Xiaohui Lv, Yao Yang, Yi Tao, Yuelu Jiang, Baiyang Chen, Xiaoshan Zhu, Zhonghua Cai, Bing Li
Graphene oxide (GO) possesses versatile applicability and high hydrophilicity, thus may have frequent contact with aquatic organisms. However, the ecological risks of GO in aquatic ecosystems remain largely unexplored currently. This study evaluated the comprehensive toxicological effects of GO on Daphnia magna, a key species in fresh water ecosystem. The results revealed nonsevere acute toxicities, including immobility (72 h EC50 : 44.3 mg/L) and mortality (72 h LC50 : 45.4 mg/L), of GO on D. magna. To understand the underlying mechanism of GO exposure, changes in superoxide dismutase (SOD) and lipid peroxidation (LPO) of D...
March 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29665386/enzymatically-crosslinked-and-mechanically-tunable-silk-fibroin-pullulan-hydrogels-for-mesenchymal-stem-cells-delivery
#17
Tao Li, Xiongbo Song, Changmei Weng, Xin Wang, Jiangyi Wu, Li Sun, Xiaoyuan Gong, Wei-Nan Zeng, Liu Yang, Cheng Chen
Hydrogels with good biocompatibility, proper degradation rates, and tissue-matched elasticity are widely used in tissue engineering, regenerative medicine, and drug delivery. In this study, enzymatically crosslinked biocompatible hydrogels were successfully developed using silk fibroin (SF) and pullulan (PL) under physiological conditions in the presence of both horseradish peroxidase (HRP) and hydrogen peroxide (H2 O2 ). A series of properties of the hydrogels including gelation time, equilibrium swelling, enzyme degradation, morphology, rheological property, and compression modulus of SF/PL hydrogels were studied by varying the concentration of PL...
April 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29665335/x-ray-diffraction-and-density-functional-theory-provide-insight-into-vanadate-binding-to-homohexameric-bromoperoxidase-ii-and-the-mechanism-of-bromide-oxidation
#18
Madlen Radlow, Mirjam Czjzek, Alexandra Jeudy, Jerome Dabin, Ludovic Delage, Catherine Leblanc, Jens Hartung
X-ray diffraction of native bromoperoxidase II (EC 1.11.1.18) from the brown alga Ascophyllum nodosum reveals at a resolution of 2.26 Ångström details of orthovanadate binding and homohexameric protein organization. Three dimers interwoven in contact regions and tightened by hydrogen bond-clamped guanidinium stacks along with regularly aligned water molecules form the basic structure of the enyzme. Intra- and intermolecular disulfide bridges further stabilize the enzyme preventing altogether the protein from denaturing up to a temperature of 90 °C, as evident from dynamic light scattering and the on-gel ortho-dianisidine assay...
April 17, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29665163/lowered-quality-of-life-in-mood-disorders-is-associated-with-increased-neuro-oxidative-stress-and-basal-thyroid-stimulating-hormone-levels-and-use-of-anticonvulsant-mood-stabilizers
#19
Caroline Sampaio Nunes, Michael Maes, Chutima Roomruangwong, Juliana Brum Moraes, Kamila Landucci Bonifacio, Heber Odebrecht Vargas, Decio Sabbatini Barbosa, George Anderson, Luiz Gustavo Piccoli de Melo, Stoyanov Drozdstoj, Estefania Moreira, André F Carvalho, Sandra Odebrecht Vargas Nunes
RATIONALE, AIMS: Major affective disorders including bipolar disorder (BD) and major depressive disorder (MDD) are associated with impaired health-related quality of life (HRQoL). Oxidative stress and subtle thyroid abnormalities may play a pathophysiological role in both disorders. Thus, the current study was performed to examine whether neuro-oxidative biomarkers and thyroid-stimulating hormone (TSH) levels could predict HRQoL in BD and MDD. METHODS: This cross-sectional study enrolled 68 BD and 37 MDD patients and 66 healthy controls...
April 17, 2018: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/29664028/dyslipidaemia-oxidative-stress-in-patients-of-psoriasis-emerging-cardiovascular-risk-factors
#20
Kumari Asha, Archana Singal, Suman Bala Sharma, Vinod Kumar Arora, Amitesh Aggarwal
Background & objectives: Psoriasis is a recurrent hyper-proliferative skin disease which is often associated with free radical generation, abnormal lipid metabolism and increased inflammatory secretion that induce cardiovascular risk in these patients. The present study was intended to evaluate serum lipids, lipoprotein and oxidants-antioxidants status and to establish their relationship with atherogenic risk markers [oxidized low-density lipoprotein (oxLDL) and high-sensitivity C-reactive protein (hsCRP)] in patients with psoriasis...
December 2017: Indian Journal of Medical Research
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