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https://www.readbyqxmd.com/read/28922767/photosynthetic-and-metabolic-acclimation-to-repeated-drought-events-play-key-roles-in-drought-tolerance-in-coffee
#1
Paulo E Menezes-Silva, Lilian M V P Sanglard, Rodrigo T Ávila, Leandro E Morais, Samuel C V Martins, Priscilla Nobres, Camila M Patreze, Marcio A Ferreira, Wagner L Araújo, Alisdair R Fernie, Fábio M DaMatta
Over the last decades, most information on the mechanisms underlying tolerance to drought has been gained by considering this stress as a single event that happens just once in the life of a plant, in contrast to what occurs under natural conditions where recurrent drought episodes are the rule. Here we explored mechanisms of drought tolerance in coffee (Coffea canephora) plants from a broader perspective, integrating key aspects of plant physiology and biochemistry. We show that plants exposed to multiple drought events displayed higher photosynthetic rates, which were largely accounted for by biochemical rather than diffusive or hydraulic factors, than those submitted to drought for the first time...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28922728/hepatoprotective-effect-of-fraxin-against-carbon-tetrachloride-induced-hepatotoxicity-in-vitro-and-in-vivo-through-regulating-hepatic-antioxidant-inflammation-response-and-the-mapk-nf-%C3%AE%C2%BAb-signaling-pathway
#2
Xiaofeng Niu, Fang Liu, Weifeng Li, Wenbing Zhi, Qing Yao, Jinmeng Zhao, Guoxiang Yang, Xiumei Wang, Lin Qin, Zehong He
Fraxin, a main active component isolated from Cortex Fraxini, possesses a variety of bioactivities. However, there is a research gap in studies related to the hepatoprotective activity of fraxin against carbon tetrachloride (CCl4)-induced liver damage has been rarely studied. Thus, the purpose of this study is to evaluate the protective effect of fraxin against CCl4-induced liver damage in mice as well as in HepG2 cells, in addition to further improve the underlying mechanisms of hepatoprotective effect for fraxin...
September 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922725/ameliorative-impact-of-morus-alba-leaves-aqueous-extract-against-embryonic-ophthalmic-tissue-malformation-in-streptozotocin-induced-diabetic-rats
#3
Adel M A Assiri, Mohamed E El-Beeh, Ali H Amin, Mohamed Fawzy Ramadan
BACKGROUND: Diabetes mellitus (DM) is becoming a serious threat to human health. Morus alba var. multicaulis (Perr.) Loudon (Moraceae) showed a bright future in DM therapy. OBJECTIVE: The study evaluates the antioxidant activity of Morus alba leaves aqueous extract (MLAE) and antidiabetic properties of MLAE in streptozotocin-induced diabetic rats focusing on the ameliorative effects against embryogenesis defects. MATERIALS AND METHODS: MLAE was assayed for bioactive compounds, and antiradical potential...
September 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922724/oyster-ostrea-plicatula-gmelin-polysaccharides-intervention-ameliorates-cyclophosphamide-induced-genotoxicity-and-hepatotoxicity-in-mice-via-the-nrf2-are-pathway
#4
Shuting Lin, Gengxin Hao, Min Long, Fei Lai, Qingqin Li, Yongmei Xiong, Yan Tian, Dong Lai
In this study, we explored the protective effects of oyster (Ostrea plicatula Gmelin) polysaccharides (OPS) against genotoxicity and liver injury induced by cyclophosphamide (CP) in BALB/c mice. OPS was administered to mice at doses of 100 and 200mg/kg for 7 consecutive days, then 50mg/kg CP was injected via abdomen. Then mice were sacrificed and samples were collected. Bone marrow micronuclei (MN) and polychromatic erythrocytes (PCE): normochromatic erythrocytes (NCE) ratio were calculated to evaluate CP induced genetic toxicity...
September 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922723/protective-effects-of-mirtazapine-and-chrysin-on-experimentally-induced-testicular-damage-in-rats
#5
Alaa E El-Sisi, Magda E El-Sayad, Nermine M Abdelsalam
Mirtazapine is an antidepressant with prominent antioxidant effects. Chrysin, a natural flavone, exhibits multiple pharmacological actions. This study was designed to investigate the potential protective effects of chrysin and mirtazapine against nitrofurazone-induced testicular damage in rats. Possible underlying mechanisms such as oxidative stress, inflammation and apoptosis were also investigated. Testicular damage was induced by oral administration of nitrofurazone (50mg/kg/day) for two weeks. Chrysin (25 and 50mg/kg/day, p...
September 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922722/molecular-mechanisms-of-anticancer-effects-of-glucosamine
#6
REVIEW
Fatemeh Zahedipour, Razieh Dalirfardouei, Gholamreza Karimi, Khadijeh Jamialahmadi
Glucosamine is an amino sugar that is produced naturally in human body. It is an essential carbohydrate component of many cellular glycoproteins, glycolipids, and glycosaminoglycans (GAGs). This popular over-the-counter supplement is also found in the exoskeleton of crustaceans. Glucosamine and its derivatives have a long history in medicine for inflammatory conditions specially to relieve arthritis. This dietary supplement has numerous biological and pharmacological properties, including anti-inflammatory, antioxidant, anti-aging, anti-fibrotic, neuroprotective and cardioprotective activities...
September 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922713/peppermint-essential-oil-alleviates-hyperglycemia-caused-by-streptozotocin-nicotinamide-induced-type-2-diabetes-in-rats
#7
Suhair A Abdellatief, Rasha R Beheiry, Shefaa A M El-Mandrawy
The prevalence of diabetes mellitus is steadily growing throughout the world. Traditional medicine has an excellent potential in the treatment of diabetes mellitus. The present study was undertaken to evaluate the potential antidiabetic effect of peppermint essential oil (PEO) on streptozotocin (STZ) and nicotinamide induced diabetic rats. Diabetes was induced in rats fasting overnight by the intraperitoneal administration of nicotinamide followed by a single dose of STZ. After 72h, two groups of diabetic rats were treated with different doses of PEO (40 and 80mg/kg BW) respectively and one group was treated with the standard hypoglycemic agent glibenclamide...
September 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922646/synthesis-spectral-characterization-and-computed-optical-analysis-of-potent-triazole-based-compounds
#8
Sajjad H Sumrra, Fazila Mushtaq, Muhammad Khalid, Muhammad Asam Raza, Muhammad Faizan Nazar, Bakhat Ali, Ataualpa A C Braga
Biologically active triazole Schiff base ligand (L) and metal complexes [Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)] are reported herein. The ligand acted as tridentate and coordinated towards metallic ions via azomethine-N, triazolic-N moiety and deprotonated-O of phenyl substituents in an octahedral manner. These compounds were characterized by physical, spectral and analytical analysis. The synthesized ligand and metal complexes were screened for antibacterial pathogens against Chromohalobacter salexigens, Chromohalobacter israelensi, Halomonas halofila and Halomonas salina, antifungal bioassay against Aspergillus niger and Aspergellus flavin, antioxidant (DPPH, phosphomolybdate) and also for enzyme inhibition [butyrylcholinesterase (BChE) and acetylcholinesterase (AChE)] studies...
September 13, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28922594/dose-dependent-response-to-3-nitrobenzanthrone-exposure-in-human-urothelial-cancer-cells
#9
Mario Pink, Nisha Verma, Anna Zerries, Simone Schmitz-Spanke
A product of incomplete combustion of diesel fuel, 3-nitrobenzanthrone (3-NBA), has been classified as a cancer-causing substance. It first gained attention as a potential urinary bladder carcinogen due to the presence of its metabolite in urine and formation of DNA adducts. The aim of the present study was to characterise the dose-response relationship of 3-NBA in human urothelial cancer cell line (RT4) exposed to concentrations ranging from 0.0003 µM (environmentally relevant) to 80 µM by utilising toxicological and metabolomic approaches...
September 18, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28922532/redox-modulatory-mn3o4-nanozyme-with-multi-enzyme-activity-provides-efficient-cytoprotection-to-human-cells-in-parkinson-s-disease-model
#10
Govindasamy Mugesh, Namrata Singh, Mohammed Azharuddin Savanur, Shubhi Srivastava, Patrick D'Silva
Nanomaterials with enzyme-like activities (nanozymes) attracts significant interest due to their therapeutic potential for the treatment of various diseases. Herein, we report that a Mn3O4 nanozyme functionally mimic three major antioxidant enzymes, i.e. superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) and the multienzyme activity is size as well as morphology-dependent. The redox modulatory effect of Mn3O4 plays a crucial role in protecting the cells from MPP+ induced cytotoxicity in a Parkinson disease (PD)-like cellular model, indicating that manganese-based nanomaterials having multi-enzyme activity can robustly rescue the cells from oxidative damage and thereby possess therapeutic potential to prevent ROS-mediated neurological disorders...
September 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28922499/antioxidants-wonder-drugs-or-quackery
#11
REVIEW
Angelo Azzi
An answer to the question posed by the title must be simple not to disturb in his tomb Albert Einstein, who wrote "Man muß die Dinge so einfach wie möglich machen. Aber nicht einfacher". A simple answer (not simpler) can be: Antioxidants are not antioxidants, they are not wonder drugs and they are not all quackery; but they are not nothing. The arguments in support of this conundrumic statement will be developed below. © 2017 BioFactors, 2017.
September 18, 2017: BioFactors
https://www.readbyqxmd.com/read/28922384/effects-of-salinity-and-drought-on-growth-ionic-relations-compatible-solutes-and-activation-of-antioxidant-systems-in-oleander-nerium-oleander-l
#12
Dinesh Kumar, Mohamad Al Hassan, Miguel A Naranjo, Veena Agrawal, Monica Boscaiu, Oscar Vicente
Nerium oleander is an ornamental species of high aesthetic value, grown in arid and semi-arid regions because of its drought tolerance, which is also considered as relatively resistant to salt; yet the biochemical and molecular mechanisms underlying oleander's stress tolerance remain largely unknown. To investigate these mechanisms, one-year-old oleander seedlings were exposed to 15 and 30 days of treatment with increasing salt concentrations, up to 800 mM NaCl, and to complete withholding of irrigation; growth parameters and biochemical markers characteristic of conserved stress-response pathways were then determined in stressed and control plants...
2017: PloS One
https://www.readbyqxmd.com/read/28922365/isothiocyanate-enriched-moringa-seed-extract-alleviates-ulcerative-colitis-symptoms-in-mice
#13
Youjin Kim, Alex G Wu, Asha Jaja-Chimedza, Brittany L Graf, Carrie Waterman, Michael P Verzi, Ilya Raskin
Moringa (Moringa oleifera Lam.) seed extract (MSE) has anti-inflammatory and antioxidant activities. We investigated the effects of MSE enriched in moringa isothiocyanate-1 (MIC-1), its putative bioactive, on ulcerative colitis (UC) and its anti-inflammatory/antioxidant mechanism likely mediated through Nrf2-signaling pathway. Dextran sulfate sodium (DSS)-induced acute (n = 8/group; 3% DSS for 5 d) and chronic (n = 6/group; cyclic rotations of 2.5% DSS/water for 30 d) UC was induced in mice that were assigned to 4 experimental groups: healthy control (water/vehicle), disease control (DSS/vehicle), MSE treatment (DSS/MSE), or 5-aminosalicyic acid (5-ASA) treatment (positive control; DSS/5-ASA)...
2017: PloS One
https://www.readbyqxmd.com/read/28922153/sex-dependent-associations-of-serum-uric-acid-with-brain-function-during-aging
#14
Alexandra M Kueider, Yang An, Toshiko Tanaka, Melissa H Kitner-Triolo, Stephanie Studenski, Luigi Ferrucci, Madhav Thambisetty
Serum uric acid (SUA) is an abundant natural antioxidant which could reduce the burden of cellular oxidation, a major cause of neurodegenerative disease. In line with this, SUA levels are lower in those with Alzheimer's disease; however, the association between SUA and cognition remains unclear. Results from studies examining the effects of SUA on cognition may be difficult to interpret in the context of normal versus pathological aging. This study examined sex-specific associations of baseline SUA with cognition during aging...
September 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28921917/changes-on-the-pancreas-in-experimental-diabetes-and-the-effect-of-lycopene-on-these-changes-pdx-1-ngn-3-and-nestin-expressions
#15
Mustafa Sandıkcı, Levent Karagenc, Mustafa Yıldız
The aim of the present study was to investigate changes occurring in the number of beta cells, as well as the expressions of Ngn-3, nestin and Pdx-1 of pancreatic progenitor cells in the pancreas of experimentally-induced adult diabetic rats and to determine the effect of orally-administered lycopene on these changes. Following the administration of 50 mg/kg streptozotocin to rats, four groups of animals were established: control+corn oil, control+lycopene, diabetic+corn oil and diabetic+lycopene. The animals in the control+lycopene and diabetic+lycopene groups received 4 mg/kg lycopene for a period of four weeks...
September 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28921887/chemical-components-biological-activities-and-toxicological-evaluation-of-the-fruit-aril-of-two-precious-plant-species-from-genus-taxus
#16
Na Li, Zheng Pan, Dan Zhang, Huaxing Wang, Bao Yu, Shengping Zhao, Jiajia Guo, Jianwei Wang, Ling Yao, Weiguo Cao
The fruit (aril) of the endangered genus Taxus plants is an abandoned herbal resource. Traditionally, people enthusiasticly focus on its bark, its renewable, tremendous arils fall into the soil with seeds after they are mature. The present research investigated the fruit of two species from the genus Taxus, Taxus chinensis var. mairei and Taxus media, with regards to their antioxidant and antihyperglycaemic activities, safety, and bioactive constituents. Results showed that T. chinensis var. mairei and T. media both had certain biological activities with T...
September 18, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28921705/green-tea-makes-polyphenol-nanoparticles-with-radical-scavenging-activities
#17
Siying Xiang, Peng Yang, Hao Guo, Shu Zhang, Xiaokang Zhang, Fang Zhu, Yiwen Li
The constant demand for functional nanomaterials from natural biomass polymers usually requires new "green" synthetic strategies without using any foreign additives. Here, the green fabrication of a series of polyphenol nanoparticles (PNs) only from green tea extraction compounds is reported (i.e., tea polyphenols and theophylline). It is found that the nanoparticle formation process involves covalent copolymerization of monomers, as well as noncovalent self-assembly pathways. Additionally, the resulting PNs exhibit better free-radical scavenging activities compared with similar-sized, polydopamine-based synthetic melanin nanoparticles...
September 15, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28921587/dimethyl-fumarate-treatment-after-traumatic-brain-injury-prevents-depletion-of-antioxidative-brain-glutathione-and-confers-neuroprotection
#18
Tobias Krämer, Theresa Grob, Lutz Menzel, Tobias Hirnet, Eva Griemert, Konstantin Radyushkin, Serge C Thal, Axel Methner, Michael K E Schaefer
Dimethyl fumarate (DMF) is an immunomodulatory therapeutic for multiple sclerosis and psoriasis with neuroprotective potential. Its mechanism of action involves activation of the antioxidant pathway regulator Nuclear factor erythroid 2-related factor 2 (Nrf2) thereby increasing synthesis of the cellular antioxidant glutathione (GSH). The objective of this study was to investigate whether post-traumatic DMF treatment is beneficial after experimental traumatic brain injury (TBI). Adult C57Bl/6 mice were subjected to controlled cortical impact followed by oral administration of DMF (80 mg/kg body weight) or vehicle at 3 h, 24 h, 48 h and 72 h after the inflicted TBI...
September 16, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28921399/artesunate-inhibits-renal-ischemia-reperfusion-stimulated-lung-inflammation-in-rats-by-activating-ho-1-pathway
#19
Zhaohui Liu, Junjie Zhang, Shitong Li, Jihong Jiang
Artesunate (AS), a semi-synthetic derivative of Artemisia, has been shown to exert a wide range of pharmacological effects, such as anti-inflammatory and antioxidant functions. However, the protective functions of AS on renal ischemia reperfusion injury (RIR)-stimulated lung inflammation remain unclear. In this research, acute lung injury (ALI) was stimulated by renal ischemia reperfusion injury (RIR). AS (15 mg/kg) was intraperitoneal administrated to rat 1 h before RIR stimulation. Serum and pulmonary NO, MDA, IL-6, MIP-2, and PGE2 levels, arterial blood gas and biochemistry, lung wet/dry weight ratio and MPO activity, total cell number and protein concentration in BALF, tissue histology, and NF-κB expression were determined...
September 18, 2017: Inflammation
https://www.readbyqxmd.com/read/28921394/combination-therapy-with-pirfenidone-plus-prednisolone-ameliorates-paraquat-induced-pulmonary-fibrosis
#20
Rokhsana Rasooli, Fatemeh Pourgholamhosein, Younes Kamali, Fatemeh Nabipour, Ali Mandegary
Pirfenidone is known to slow the decline in vital capacity and increase survival in idiopathic pulmonary fibrosis (IPF). Besides, administration of glucocorticoids, e.g., prednisolone has been the conventional strategy to the treatment of patients with this disease, although their efficacy is under debate. Since multiple coactivated pathways are involved in the pathogenesis of IPF, combination therapy is a foundation strategy to cover many more synergetic mechanisms and increase response. The aim of the present study was to compare the therapeutic efficacy of prednisolone plus pirfenidone with pirfenidone alone in PQ-induced lung fibrosis...
September 18, 2017: Inflammation
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