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https://www.readbyqxmd.com/read/28634445/antioxidant-treatment-with-n-acetyl-cysteine-prevents-the-development-of-cognitive-and-social-behavioral-deficits-that-result-from-perinatal-ketamine-treatment
#1
Aarron Phensy, Hasmik E Duzdabanian, Samantha Brewer, Anurag Panjabi, Christopher Driskill, Annuska Berz, George Peng, Sven Kroener
Alterations of the normal redox state can be found in all stages of schizophrenia, suggesting a key role for oxidative stress in the etiology and maintenance of the disease. Pharmacological blockade of N-methyl-D-aspartic acid (NMDA) receptors can disrupt natural antioxidant defense systems and induce schizophrenia-like behaviors in animals and healthy human subjects. Perinatal administration of the NMDA receptor (NMDAR) antagonist ketamine produces persistent behavioral deficits in adult mice which mimic a range of positive, negative, and cognitive symptoms that characterize schizophrenia...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28632169/the-novel-mechanisms-concerning-the-inhibitions-of-palmitate-induced-proinflammatory-factor-releases-and-endogenous-cellular-stress-with-astaxanthin-on-min6-%C3%AE-cells
#2
Atsuko Kitahara, Kazuto Takahashi, Naru Morita, Toshitaka Murashima, Hirohisa Onuma, Yoshikazu Sumitani, Toshiaki Tanaka, Takuma Kondo, Toshio Hosaka, Hitoshi Ishida
Astaxanthin, an antioxidant agent, can protect pancreatic β-cells of db/db mice from glucotoxicity and resolve chronic inflammation in adipose tissue. Nonetheless, the effects of astaxanthin on free-fatty-acid-induced inflammation and cellular stress in β-cells remain to be demonstrated. Meanwhile, palmitate enhances the secretion of pro-inflammatory adipokines monocyte chemoattractant protein-1 (MCP-1) and VEGF120 (vascular endothelial growth factor). We therefore investigated the influence of astaxanthin on palmitate-stimulated MCP-1 and VEGF120 secretion in mouse insulinoma (MIN6) pancreatic β-cells...
June 20, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28623559/ifn-%C3%AE-induced-reactive-oxygen-species-and-mitochondrial-damage-contribute-to-muscle-impairment-and-inflammation-maintenance-in-dermatomyositis
#3
Alain Meyer, Gilles Laverny, Yves Allenbach, Elise Grelet, Vanessa Ueberschlag, Andoni Echaniz-Laguna, Béatrice Lannes, Ghada Alsaleh, Anne Laure Charles, François Singh, Joffrey Zoll, Evelyne Lonsdorfer, François Maurier, Olivier Boyer, Jacques-Eric Gottenberg, Anne Sophie Nicot, Jocelyn Laporte, Olivier Benveniste, Daniel Metzger, Jean Sibilia, Bernard Geny
Dermatomyositis (DM) is an autoimmune disease associated with enhanced type I interferon (IFN) signalling in skeletal muscle, but the mechanisms underlying muscle dysfunction and inflammation perpetuation remain unknown. Transcriptomic analysis of early untreated DM muscles revealed that the main cluster of down-regulated genes was mitochondria-related. Histochemical, electron microscopy, and in situ oxygraphy analysis showed mitochondrial abnormalities, including increased reactive oxygen species (ROS) production and decreased respiration, which was correlated with low exercise capacities and a type I IFN signature...
June 16, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28621211/copper-doping-enhanced-the-oxidative-stress-mediated-cytotoxicity-of-tio2-nanoparticles-in-a549-cells
#4
J Ahmad, M A Siddiqui, M J Akhtar, H A Alhadlaq, A Alshamsan, S T Khan, R Wahab, A A Al-Khedhairy, A Al-Salim, J Musarrat, Q Saquib, M Fareed, M Ahamed
Physicochemical properties of titanium dioxide nanoparticles (TiO2 NPs) can be tuned by doping with metals or nonmetals. Copper (Cu) doping improved the photocatalytic behavior of TiO2 NPs that can be applied in various fields such as environmental remediation and nanomedicine. However, interaction of Cu-doped TiO2 NPs with human cells is scarce. This study was designed to explore the role of Cu doping in cytotoxic response of TiO2 NPs in human lung epithelial (A549) cells. Characterization data demonstrated the presence of both TiO2 and Cu in Cu-doped TiO2 NPs with high-quality lattice fringes without any distortion...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28614987/role-of-amino-acid-supplementation-in-prevention-of-necrotizing-enterocolitis-in-preterm-neonates-a-review-of-current-evidences
#5
Bhawan Deep Garg, Nandkishor S Kabra
BACKGROUND: Necrotizing enterocolitis (NEC) is one of the most common acute and fatal gastrointestinal emergency in very low birth weight (VLBW) preterm neonates with mortality range from 15-30%. NEC is likely due to multifactorial process such as oxidative injury, ischemic necrosis and over reactive inflammatory response to intestinal microbes. AIMS: To evaluate the role of amino acid supplementation for reduction of neonatal NEC in preterm neonates. METHOD: The literature search was done for various randomized control trial (RCT) by searching the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, EMBASE, Web of Science, Scopus, Index Copernicus, African Index Medicus (AIM), Thomson Reuters (ESCI), Chemical Abstracts Service (CAS) and other data base...
June 14, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28605780/uremia-induces-adipose-tissue-inflammation-and-muscle-mitochondrial-dysfunction
#6
Maria P Martinez Cantarin, Diana Whitaker-Menezes, Zhao Lin, Bonita Falkner
Background.: End-stage renal disease (ESRD) is associated with inflammation and increased reactive oxygen species (ROS). Inflammation and oxidative stress are associated with several complications of ESRD. The aim of this study was to determine histological characteristics of adipose tissue and muscle mitochondrial function in uremia and its relationship with inflammation. Methods.: ESRD patients ( n  = 18) and controls ( n  = 6) were enrolled for studies of adipose and muscle tissue by immunohistochemistry and western blot...
June 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28600879/ifn-gamma-priming-of-adipose-derived-stromal-cells-at-physiological-hypoxia-and-under-acute-hypoxic-stress
#7
E R Andreeva, O O Udartseva, O V Zhidkova, S V Buravkov, M I Ezdakova, L B Buravkova
Multipotent mesenchymal stromal cells (MSCs) are considered cue regulators of tissue remodelling. Their activity is strongly governed by local milieu, where O2 level is most important. The elevation of inflammatory mediators and acute O2 lowering may additionally modulate MSC activity. In present paper the priming effects of IFN-gamma on adipose tissue-derived MSCs (ASCs) at tissue-related O2 level (5%) and acute hypoxic stress (0.1% O2 ) were assessed as alterations of ASCs' CFU-F, proliferation, migration, osteo-commitment...
June 10, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28600122/oxidative-stress-plays-a-key-role-in-butyrate-mediated-autophagy-via-akt-mtor-pathway-in-hepatoma-cells
#8
Kishor Pant, Anoop Saraya, Senthil K Venugopal
Hepatocellular Carcinoma (HCC) is one of the most aggressive forms of cancer, responsible for a number of deaths in humans. Butyrate, one of the short chain fatty acids produced by the gut microbiota during anaerobic fermentation, was shown to be beneficial for inhibiting cancer growth. In this study, we showed that sodium butyrate induced autophagy via reactive oxygen species (ROS) in hepatoma cells. Butyrate (0-6 mM) incubation significantly increased intracellular ROS levels (45.2% compared to control), which in turn inhibited phosphorylation of akt and mTOR, leading to the upregulation of autophagic proteins, such as beclin 1, ATG 5, LC3-II, followed by the increased autophagosome formation (34...
June 11, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28596494/role-of-a-kinase-anchor-protein-akap4-in-growth-and-survival-of-ovarian-cancer-cells
#9
Vikash Kumar, Nirmala Jagadish, Anil Suri
Ovarian cancer represents one of the most common malignancies among women with very high mortality rate worldwide. A-kinase anchor protein 4 (AKAP4), a unique cancer testis (CT) antigen has been shown to be associated with various malignant properties of cancer cells. However, its involvement in various molecular pathways in ovarian cancer remains unknown. In present investigation, employing gene silencing approach, we examined the role of AKAP4 in cell cycle, apoptosis and epithelial-mesenchymal transition (EMT)...
May 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28595554/sulphur-containing-amino-acids-protective-role-against-free-radicals-and-heavy-metals
#10
Mirjana B Čolović, Vesna M Vasić, Dragan M Djuric, Danijela Z Krstić
Sulphur is an abundant element in biological systems, which plays an important role in processes essential for life as a constituent of proteins, vitamins and other crucial biomolecules. The major source of sulphur for humans is plants being able to use inorganic sulphur in the purpose of sulphur-containing amino acids synthesis. Sulphur-containing amino acids include methionine, cysteine, homocysteine, and taurine. Among them, methionine and cysteine are classified as proteinogenic, canonic amino acids incorporated in proteins structure...
June 8, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28594401/upconversion-nanoparticle-mediated-photodynamic-therapy-induces-autophagy-and-cholesterol-efflux-of-macrophage-derived-foam-cells-via-ros-generation
#11
Xiaobo B Han, Hongxia X Li, Yueqing Q Jiang, Hao Wang, Xuesong S Li, Jiayuan Y Kou, Yinghong H Zheng, Zhongni N Liu, Hong Li, Jing Li, Dou Dou, You Wang, Ye Tian, Liming M Yang
Macrophage-derived foam cells are a major component of atherosclerotic plaques and have an important role in the progression of atherosclerotic plaques, thus posing a great threat to human health. Photodynamic therapy (PDT) has emerged as a therapeutic strategy for atherosclerosis. Here, we investigated the effect of PDT mediated by upconversion fluorescent nanoparticles encapsulating chlorin e6 (UCNPs-Ce6) on the cholesterol efflux of THP-1 macrophage-derived foam cells and explored the possible mechanism of this effect...
June 8, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28591670/novel-synthetic-analogs-of-diallyl-disulfide-triggers-cell-cycle-arrest-and-apoptosis-via-ros-generation-in-mia-paca-2-cells
#12
Vikas Saini, Apra Manral, Rashi Arora, Poonam Meena, Siddharth Gusain, Daman Saluja, Manisha Tiwari
BACKGROUND: Diallyl disulfide (DADS), a principal organosulfur component of garlic, is known for its medicinal properties including anti-cancer activity. Prior studies have demonstrated that the compounds containing Diallyl disulfide moieties exhibited diverse therapeutic potential with promising biological activities. In the present study, we have investigated the in vitro anticancer activity of Diallyl disulfide derivatives (5a-5l and 7e-7m) against human cancer cell lines. METHODS: The effect of DADS analogs on different cancer cell lines was measured through MTT assay...
March 14, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28588678/mechanism-of-n-acetyl-cysteine-inhibition-on-the-cytotoxicity-induced-by-titanium-dioxide-nanoparticles-in-jb6-cells-transfected-with-activator-protein-1
#13
Hongbo Shi, Yuanliang Gu, Zhenhua Xie, Qi Zhou, Guochuan Mao, Xialu Lin, Kui Liu, Yu Liu, Baobo Zou, Jinshun Zhao
The present study investigated the mechanism of N-acetyl-cysteine (NAC) inhibition on the cytotoxicity induced by titanium dioxide (TiO2) nanoparticles (NPs) using murine epidermal JB6 cells transfected with activator protein-1 (AP-1), JB6-AP-1 cells. Confocal microscopy was performed to localize TiO2 NPs in cultured cells. The level of reactive oxygen species (ROS) present in cells was evaluated by staining with 2',7'-dichlorodihydrofluorescein diacetate and dihydroethidium. AP-1 gene expression levels in the cells were detected using the luciferase assay...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28580603/enhancement-of-high-glucose-induced-pink1-expression-by-melatonin-stimulates-neuronal-cell-survival-involvement-of-mt2-akt-nf-%C3%AE%C2%BAb-pathway
#14
Xaykham Onphachanh, Hyun Jik Lee, Jae Ryong Lim, Young Hyun Jung, Jun Sung Kim, Chang Woo Chae, Sei-Jung Lee, Amr Ahmed Gabr, Ho Jae Han
Hyperglycemia is a representative hallmark and risk factor for diabetes mellitus (DM) and is closely linked to DM-associated neuronal cell death. Previous investigators reported on a genome-wide association study and showed relationships between DM and melatonin receptor (MT), highlighting the role of MT signaling by assessing melatonin in DM. However, the role of MT signaling in DM pathogenesis is unclear. Therefore, we investigated the role of mitophagy regulators in high glucose-induced neuronal cell death and the effect of melatonin against high glucose-induced mitophagy regulators in neuronal cells...
June 5, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28580117/two-photon-fluorescent-probe-for-revealing-drug-induced-hepatotoxicity-via-mapping-fluctuation-of-peroxynitrite
#15
Yong Li, Xilei Xie, Xiu'e Yang, Mengmeng Li, Xiaoyun Jiao, Yuhui Sun, Xu Wang, Bo Tang
Drug-induced injury has attracted increasing attention in public health issues. Among them, hepatotoxicity has been regarded as the leading clinical problem caused by drug toxicity. However, owing to the complexity of the involved pathophysiological mechanisms and the lack of noninvasive, straightforward, and real-time tools, drug-induced hepatotoxicity has rarely been predicted satisfactorily. In this paper, by utilizing the reactive species peroxynitrite (ONOO(-)) as a biomarker, we present a two-photon fluorescent probe, TP-KA, holding rapid response, high specificity and sensitivity towards ONOO(-), to investigate drug (acetaminophen and tolcapone)-related liver injury and the remediate effect of N-acetyl cysteine (NAC)...
May 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28577134/role-of-oxidative-stress-in-the-suppression-of-immune-responses-in-peripheral-blood-mononuclear-cells-exposed-to-combustible-tobacco-product-preparation
#16
Subhashini Arimilli, Eckhardt Schmidt, Brad E Damratoski, G L Prasad
Cigarette smoking is a major risk factor for several human diseases. Chronic inflammation, resulting from increased oxidative stress, has been suggested as a mechanism that contributes to the increased susceptibility of smokers to cancer and microbial infections. We have previously shown that whole-smoke conditioned medium (WS-CM) and total particulate matter (TPM) prepared from Kentucky 3R4F reference cigarettes [collectively called as combustible tobacco product preparations (TPPs)] potently suppressed agonist-stimulated cytokine secretion and target cell killing in peripheral blood mononuclear cells (PBMCs)...
June 2, 2017: Inflammation
https://www.readbyqxmd.com/read/28560439/isoliquiritigenin-inhibits-the-proliferation-of-human-renal-carcinoma-caki-cells-through-the-ros-mediated-regulation-of-the-jak2-stat3-pathway
#17
Do-Hee Kim, Ji Eun Park, In Gyeong Chae, Geumi Park, Sooyeun Lee, Kyung-Soo Chun
Isoliquiritigenin (ISL) is a flavonoid with chalcone structure that has been noted in licorice and shallot, which are generally used in traditional Chinese medicine. ISL has demonstrated various pharmacological effects including antioxidant, anti-inflammatory and antitumor activity. However, the molecular mechanisms underlying the anticancer effects of ISL remain poorly understood. The present study revealed that ISL significantly decreased viability and induced apoptosis in human renal carcinoma Caki cells...
May 30, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28546450/fatty-acid-binding-protein-4-ap2-dependent-blt1r-expression-and-signaling
#18
Ann V Hertzel, Hongliang Xu, Michael Downey, Nicholas Kvalheim, David A Bernlohr
Previous studies have shown that reduced levels of the adipocyte fatty acid binding protein 4, FABP4 (AFABP/aP2), result in metabolic improvement including potentiated insulin sensitivity and attenuated atherosclerosis. Mechanistically, pharmacologic or genetic inhibition of FABP4 in macrophages upregulates UCP2, attenuates ROS production, polarizes cells towards the anti-inflammatory M2 state and reduces leukotriene secretion. At the protein level, FABP4 stabilizes LTA4 towards chemical hydrolysis thereby potentiating inflammatory LTC4 synthesis...
May 25, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28545464/c10orf10-depp-mediated-ros-accumulation-is-a-critical-modulator-of-foxo3-induced-autophagy
#19
S Salcher, M Hermann, U Kiechl-Kohlendorfer, M J Ausserlechner, P Obexer
BACKGROUND: Neuroblastoma is the most common solid tumor in childhood and develops from undifferentiated progenitor cells of the sympathetic nervous system. In neuronal tumor cells DNA-damaging chemotherapeutic agents activate the transcription factor FOXO3 which regulates the formation of reactive oxygen species (ROS) and cell death as well as a longevity program associated with therapy resistance. We demonstrated before that C10ORF10/DEPP, a transcriptional target of FOXO3, localizes to peroxisomes and mitochondria and impairs cellular ROS detoxification...
May 25, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28543603/silver-nanoparticles-antimicrobial-activity-cytotoxicity-and-synergism-with-n-acetyl-cysteine
#20
Selwan Hamed, Mohamed Emara, Riham M Shawky, Ramadan A El-Domany, Tareq Youssef
The fast progression of nanotechnology has led to novel therapeutic interventions. Antimicrobial activities of silver nanoparticles (Ag NPs) were tested against standard ATCC strains of Staphylococcus aureus (ATCC 9144), Escherichia coli (O157:H7), Pseudomonas aeruginosa (ATCC 27853), and Candida albicans (ATCC 90028) in addition to 60 clinical isolates collected from cancer patients. Antimicrobial activity was tested by disk diffusion method and MIC values for Ag NPs alone and in combination with N-acetylcysteine (NAC) against tested pathogens were determined by broth microdilution method...
May 22, 2017: Journal of Basic Microbiology
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