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https://www.readbyqxmd.com/read/28343084/role-of-pterostilbene-in-attenuating-immune-mediated-devastation-of-pancreatic-beta-cells-via-nrf2-signaling-cascade
#1
Dornadula Sireesh, Munuswamy-Ramanujam Ganesh, Umapathy Dhamodharan, Murugesan Sakthivadivel, Srinivasan Sivasubramanian, Palani Gunasekaran, Kunka Mohanram Ramkumar
Nrf2 (nuclear factor erythroid 2-related factor-2) is a transcription factor that regulates oxidative/xenobiotic stress response and also suppress inflammation. Nrf2 signaling is associated with an increased susceptibility to various kinds of stress. Nrf2 has been shown as a promising therapeutic target in various human diseases including diabetes. Our earlier studies showed Pterostilbene (PTS) as a potent Nrf2 activator, and it protects the pancreatic β-cells against oxidative stress. In this study, we investigated PTS confer protection against cytokine-induced β-cell apoptosis and its role on insulin secretion in streptozotocin (STZ)-induced diabetic mice...
March 6, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28342932/changes-in-hba2-and-hbf-in-alpha-thalassemia-carriers-with-klf1-mutation
#2
Stefania Satta, Maria Elisabetta Paglietti, Maria Carla Sollaino, Susanna Barella, Paolo Moi, Maria Franca Desogus, Franca Rosa Demartis, Laura Manunza, Raffaella Origa
α-thalassemia carriers are common in Mediterranean regions, particularly in the Sardinian population. Their haematological phenotype is characterized by reduced MCV and/or MCH with normal or slightly reduced HbA2 levels and normal HbF. Krüppel-like factor 1 (KLF1) is a pleiotropic erythroid transcription factor that is essential for haematopoiesis. Mutations in the KLF1 gene trigger a series of benign human red blood phenotypes, such as an increase in HbA2 and HBF. Recently, it has been found that KLF1 mutations were a frequent cause of borderline HbA2 levels in a group of Sardinian subjects...
March 18, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28342757/role-of-enzymatic-free-radical-scavengers-in-management-of-oxidative-stress-and-autoimmune-disorders
#3
REVIEW
Shikha Srivastava, Deependra Singh, Satish Patel, Manju R Singh
Autoimmune disorders are distinct with over production and accumulation of free radicals due to its undisclosed genesis. The cause of numerous disorders as cancer, arthritis, psoriasis, diabetes, alzheimer's, cardiovascular disease, Parkinson's, respiratory distress syndrome, colitis, crohn's, pulmonary fibrosis, obesity and ageing have been associated with immune dysfunction and oxidative stress. In an oxidative stress, reactive oxygen species generally provoke the series of oxidation at cellular level. The buildup of free radicals in turn triggers various inflammatory cells causing release of various inflammatory interleukins, cytokines, chemokines, and tumor necrosis factors which mediate signal transduction and transcription pathways as nuclear factor- kappa B (NF-κB), signal transducer and activator of transcription 3 (STAT3), hypoxia-inducible factor-1 (HIF-1α) and nuclear factor-erythroid 2-related factor (Nrf2)...
March 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28340113/gata1-is-a-sensitive-and-specific-nuclear-marker-for-erythroid-and-megakaryocytic-lineages
#4
Winston Y Lee, Olga K Weinberg, Geraldine S Pinkus
Objectives: GATA binding factor 1 (GATA1) is a transcription factor essential for erythromegakaryocytic differentiation. Given its function in lineage specification, we sought to evaluate the immunohistochemical profile of GATA1 in normal marrow and acute leukemia and assess the use of GATA1 as a specific erythromegakaryocytic immunohistochemical marker. Methods: Immunohistochemical studies for GATA1 expression were performed on bone marrow biopsy specimens to define its role in the evaluation of acute leukemia and other hematologic disorders...
March 15, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28339044/suppression-of-nuclear-factor-erythroid%C3%A2-2%C3%A2-related-factor-2%C3%A2-mediated-antioxidative-defense-in-the-lung-injury-induced-by-chronic-exposure-to-methamphetamine-in-rats
#5
Yang Bai, Yun Wang, Ming Liu, Yu-Han Gu, Bin Jiang, Xu Wu, Huai-Liang Wang
The imbalance between oxidative stress and antioxidant defense is important in the pathogenesis of lung diseases. Nuclear factor erythroid‑2‑related factor 2 (Nrf2) is a key transcriptional factor that regulates the antioxidant response. The purpose of the present study was to investigate whether Nrf2‑mediated antioxidative defense is involved in methamphetamine (MA)‑induced lung injury in rats. Following establishment of chronic MA toxicity in rats, Doppler ultrasonic detection was used to measure the changes of physiological indexes, followed by hematoxylin and eosin staining, ELISA and western blot analysis...
March 22, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28336526/identification-of-unipotent-megakaryocyte-progenitors-in-human-hematopoiesis
#6
Kohta Miyawaki, Hiromi Iwasaki, Takashi Jiromaru, Hirotake Kusumoto, Ayano Yurino, Takeshi Sugio, Yasufumi Uehara, Jun Odawara, Shinya Daitoku, Yuya Kunisaki, Yasuo Mori, Yojiro Arinobu, Hirofumi Tsuzuki, Yoshikane Kikushige, Tadafumi Iino, Koji Kato, Katsuto Takenaka, Toshihiro Miyamoto, Takahiro Maeda, Koichi Akashi
The developmental pathway for human megakaryocytes remains unclear and the definition of pure unipotent megakaryocyte progenitor is still controversial. Using single-cell transcriptome analysis, we have identified a cluster of cells within immature hematopoietic stem and progenitor cell populations that specifically express genes related to the megakaryocyte lineage. We used CD41 as a positive marker to identify these cells within the CD34(+)CD38(+)IL-3Rα(dim)CD45RA(-) common myeloid progenitor (CMP) population...
March 23, 2017: Blood
https://www.readbyqxmd.com/read/28335502/catechins-and-their-therapeutic-benefits-to-inflammatory-bowel-disease
#7
REVIEW
Fei-Yan Fan, Li-Xuan Sang, Min Jiang
Catechins are natural polyphenolic phytochemicals that exist in food and medicinal plants, such as tea, legume and rubiaceae. An increasing number of studies have associated the intake of catechins-rich foods with the prevention and treatment of chronic diseases in humans, such as inflammatory bowel disease (IBD). Some studies have demonstrated that catechins could significantly inhibit the excessive oxidative stress through direct or indirect antioxidant effects and promote the activation of the antioxidative substances such as glutathione peroxidases (GPO) and glutathione (GSH), reducing the oxidative damages to the colon...
March 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28334550/geraniol-promotes-functional-recovery-and-attenuates-neuropathic-pain-in-rats-with-spinal-cord-injury
#8
Yan Lv, Liang Zhang, Na Li, Naiken Mai, Yu Zhang, Shuyi Pan
Geraniol, a plant derived monoterpene, has been extensively studied and showed a wide variety of beneficial effects. The aim of this study was to investigate the therapeutic effect of geraniol on functional recovery and neuropathic pain in rats with spinal cord injury (SCI). Rats received a clip-compression SCI and were treated with geraniol 6 hours following SCI. Treatment of SCI rats with geraniol markedly improved locomotor function, and reduced sensitivity to the mechanical allodynia and thermal hyperalgesia...
March 23, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28334048/hepatoprotective-effect-of-sitagliptin-against-methotrexate-induced-liver-toxicity
#9
Hany M Abo-Haded, Mohamed A Elkablawy, Zeyad Al-Johani, Osama Al-Ahmadi, Dina S El-Agamy
Sitagliptin is selective dipeptidyl peptidase-4 inhibitor (DPP4-I), used clinically as a new oral anti-diabetic agent. This study explored the underlying mechanisms of the hepatoprotective role of sitagliptin pretreatment against methotrexate (MTX) induced hepatotoxicity in mice. Forty mice were divided into four groups (10 mice each); control, MTX, and two sitagliptin groups (pretreated with sitagliptin 10 and 20 mg/kg/day, respectively) for five consecutive days prior to MTX injection. Results showed that MTX induced marked hepatic injury in the form of cloudy swelling, hydropic degeneration, apoptosis and focal necrosis in all hepatic zones...
2017: PloS One
https://www.readbyqxmd.com/read/28333129/protection-against-oxidative-stress-mediated-by-the-nrf2-keap1-axis-is-impaired-in-primary-biliary-cholangitis
#10
Urszula Wasik, Małgorzata Milkiewicz, Agnieszka Kempinska-Podhorodecka, Piotr Milkiewicz
In response to oxidative stress, nuclear factor (erythroid-derived 2)-like2 (Nrf2) induces expression of cytoprotective genes. The Nrf2 pathway is controlled by microRNAs and Kelch-like ECH-associated protein1 (Keap1). Nrf2 is stabilized when Keap1 is degraded through the autophagy pathway in a p62-dependent manner. The inhibition of autophagy causes protein accumulation, and Keap1 is inactivated by binding to p62. We investigated the role of the Nrf2/Keap1 axis in the amelioration of oxidative stress in primary biliary cholangitis (PBC)...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330870/nuclear-factor-erythroid-2-related-factor-2-enhances-carcinogenesis-by-suppressing-apoptosis-and-promoting-autophagy-in-nickel-transformed-cells
#11
Young-Ok Son, Poyil Pratheeshkumar, Sasidharan Padmaja Divya, Zhuo Zhang, Xianglin Shi
Nickel-containing compounds are used widely in industry. Nickel is a known human carcinogen that primarily targets the lungs. Proposed mechanisms of nickel-induced carcinogenesis include disruption of cellular iron homeostasis, generation of reactive oxygen species (ROS), and induction of hypoxia signaling. The precise molecular mechanisms of nickel-induced malignant transformation and tumor development remain unclear. This study shows that the transcription factor Nrf2 is highly expressed in lung tumor tissue and in nickel-transformed human lung bronchial epithelial BEAS-2B cells (NiT cells)...
March 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28324486/mitopho8%C3%AE-60-assay-as-a-tool-to-quantitatively-measure-mitophagy-activity
#12
Zhiyuan Yao, Xu Liu, Daniel J Klionsky
Mitophagy, a selective type of macroautophagy (hereafter referred to as autophagy), specifically mediates the vacuole/lysosome-dependent degradation of damaged or surplus mitochondria. Because this process regulates the number and quality of mitochondria, it is vital for proper cellular homeostasis. Mitophagy also plays critical roles in the clearance of paternal mitochondria in C. elegans embryos, in erythroid cell maturation, and in the prevention of neurodegenerative disease and cancer. In order to study the molecular mechanism and regulation of mitophagy, sensitive assays are necessary to quantitatively measure mitophagy activity...
March 22, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28324005/insulin-inhibits-nrf2-gene-expression-via-heterogeneous-nuclear-ribonucleoprotein-f-k-in-diabetic-mice
#13
Anindya Ghosh, Shaaban Abdo, Shuiling Zhao, Chin-Han Wu, Yixuan Shi, Chao-Sheng Lo, Isabelle Chenier, Thierry Alquier, Janos G Filep, Julie R Ingelfinger, Shao-Ling Zhang, John S D Chan
Oxidative stress induces endogenous antioxidants via nuclear factor erythroid 2-related factor 2 (Nrf2), potentially preventing tissue injury. We investigated whether insulin affects renal Nrf2 expression in type 1 diabetes (T1D) and studied its underlying mechanism. Insulin normalized hyperglycemia, hypertension, oxidative stress and renal injury, inhibited renal Nrf2 and angiotensinogen (Agt) gene expression and up-regulated heterogeneous nuclear ribonucleoprotein F (hnRNP F) and hnRNP K expression in Akita mice with T1D...
January 23, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323011/apocynin-protects-against-neurological-damage-induced-by-quinolinic-acid-by-an-increase-in-glutathione-synthesis-and-nrf2-levels
#14
Silvia Cruz-Álvarez, Ricardo Santana-Martínez, Euclides Avila-Chávez, Diana Barrera-Oviedo, Rogelio Hernández-Pando, José Pedraza-Chaverri, Perla D Maldonado
Apocynin (APO) is a well-known NADPH oxidase (NOX) inhibitor. However, several studies have reported its ability to increase glutathione (GSH) levels. Due to GSH is a major non-enzymatic antioxidant in brain, the aim of this study was to evaluate, in the striatum of control and quinolinic acid (QUIN) injected rats, the effect of APO administration on: (1) GSH levels, (2) activity of some enzymes involved in the GSH metabolism, and (3) nuclear factor erythroid-2-related factor 2 (Nrf2) mRNA levels. Animals received QUIN 240nmol in right striatum and APO (5mg/kg, i...
March 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28320516/l-f001-a-novel-multifunctional-rock-inhibitor-suppresses-neuroinflammation-in-vitro-and-in-vivo-involvement-of-nf-%C3%AE%C2%BAb-inhibition-and-nrf2-pathway-activation
#15
Jingkao Chen, Wei Yin, Yalin Tu, Shengnan Wang, Xiaohong Yang, Qiuhe Chen, Xiao Zhang, Yifan Han, Rongbiao Pi
Microglia and astrocytes are largely responsible for inflammatory injury in the brain of Alzheimer's disease (AD). Increasing evidence has indicated that Rho kinase (ROCK) plays an important role in the regulation of neuroinflammation. Previously, we synthesized a new chemical entity L-F001 and proved its potential inhibitory effects on ROCK and oxidative stress. Here, we investigated the anti-inflammatory effects and the molecular mechanisms of L-F001 in vitro and in vivo. L-F001 remarkably suppressed lipopolysaccharides (LPS)-elevated expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) as well as LPS-induced production of nitric oxide (NO), reactive oxygen species, interleukin-6 (IL-6) and tumor necreactive oxygen speciesis factor-α (TNF-α) in microglial BV-2 cells and in cultured astrocytes...
March 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28320085/down-regulation-of-microrna-142-5p-attenuates-oxygen-glucose-deprivation-and-reoxygenation-induced-neuron-injury-through-up-regulating-nrf2-are-signaling-pathway
#16
Ning Wang, Lingmin Zhang, Yang Lu, Mingxin Zhang, Zhenni Zhang, Kui Wang, Jianrui Lv
MicroRNAs (miRNAs) play vital roles in regulating neuron survival during cerebral ischemia/reperfusion injury. miR-142-5p is reported to be an important regulator of cellular survival. However, little is known about the role of miR-142-5p in regulating neuron survival during cerebral ischemia/reperfusion injury. In this study, we aimed to investigate the precise function and mechanism of miR-142-5p in the regulation of neuron ischemia/reperfusion injury using a cellular model of oxygen-glucose deprivation and reoxygenation (OGD/R)-induced injury in hippocampal neurons in vitro...
March 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28315822/protective-effect-of-zerumbone-reduces-lipopolysaccharide-induced-acute-lung-injury-via-antioxidative-enzymes-and-nrf2-ho-1-pathway
#17
Wai-Shing Leung, Ming-Ling Yang, Shiuan-Shinn Lee, Chi-Wen Kuo, Yung-Chyuan Ho, Rosa Huang-Liu, Hui-Wen Lin, Yu-Hsiang Kuan
Acute lung injury (ALI) is a serious disease with high morbidity and mortality rate. Although there are effective strategies for treatment of ALI; a widely accepted specific pharmacotherapy has not yet established. Zerumbone, the major active phytochemical compound from Zingiber zerumbet Smith, exhibits various beneficial biological and pharmacological activities, such as antioxidation, anti-inflammation, immunomodulation, and anti-cancer. We aimed to study the potential protective effects and mechanisms of zerumbone in mouse model of lipopolysaccharide (LPS)-induced ALI...
March 15, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28315454/astragaloside-iv-attenuates-lead-acetate-induced-inhibition-of-neurite-outgrowth-through-activation-of-akt-dependent-nrf2-pathway-in-vitro
#18
Chunlei Yu, Siwen Pan, Miaoxian Dong, Yingcai Niu
Recently, oxidative stress is strongly associated with lead (Pb)-induced neurotoxicity. We reported previously that Astragaloside IV (AS-IV) possesses potent antioxidant properties. Here, we evaluate the hypothesis that AS-IV attenuates lead acetate (PbAc)-mediated inhibition of neurite outgrowth might mainly result from its antioxidant property via serine/threonine protein kinase (Akt)-dependent activation of the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway. Interestingly, AS-IV attenuates PbAc-induced inhibition of neurite outgrowth and displayed potential antioxidant properties by inhibiting reactive oxygen species (ROS)...
March 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28314773/glucocorticoid-receptor-signaling-represses-the-antioxidant-response-by-inhibiting-histone-acetylation-mediated-by-the-transcriptional-activator-nrf2
#19
Md Morshedul Alam, Keito Okazaki, Linh Thi Thao Nguyen, Nao Ota, Hiroshi Kitamura, Shohei Murakami, Hiroki Shima, Kazuhiko Igarashi, Hiroki Sekine, Hozumi Motohashi
NRF2 (nuclear factor erythroid 2-related factor 2) is a key transcriptional activator that mediates the inducible expression of antioxidant genes. NRF2 is normally ubiquitinated by KEAP1 (Kelch-like ECH-associated protein 1) and subsequently degraded by proteasomes. Inactivation of KEAP1 by oxidative stress or electrophilic chemicals allows NRF2 to activate transcription through binding to antioxidant response elements (AREs) and recruiting histone acetyltransferase CBP (CREB-binding protein). While KEAP1-dependent regulation is a major determinant of NRF2 activity, NRF2-mediated transcriptional activation varies from context to context, suggesting other intracellular signaling cascades may impact NRF2 function...
March 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28314621/docosahexaenoic-acid-dha-an-essential-nutrient-and-a-nutraceutical-for-brain-health-and-diseases
#20
REVIEW
Grace Y Sun, Agnes Simonyi, Kevin L Fritsche, Dennis Y Chuang, Mark Hannink, Zezong Gu, C Michael Greenlief, Jeffrey K Yao, James C Lee, David Q Beversdorf
Docosahexaenoic acid (DHA), a polyunsaturated fatty acid (PUFA) enriched in phospholipids in the brain and retina, is known to play multi-functional roles in brain health and diseases. While arachidonic acid (AA) is released from membrane phospholipids by cytosolic phospholipase A2 (cPLA2), DHA is linked to action of the Ca(2+)-independent iPLA2. DHA undergoes enzymatic conversion by 15-lipoxygenase (Alox 15) to form oxylipins including resolvins and neuroprotectins, which are powerful lipid mediators. DHA can also undergo non-enzymatic conversion by reacting with oxygen free radicals (ROS), which cause the production of 4-hydoxyhexenal (4-HHE), an aldehyde derivative which can form adducts with DNA, proteins and lipids...
March 10, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
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