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Antioxidant enzymes

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https://www.readbyqxmd.com/read/28735471/effect-of-processing-conditions-on-degree-of-hydrolysis-ace-inhibition-and-antioxidant-activities-of-protein-hydrolysate-from-acetes-indicus
#1
Vignaesh Dhanabalan, Martin Xavier, Nagalakshmi Kannuchamy, Kurukkan Kunnath Asha, Chongtham Baru Singh, Amjad Balange
Protein hydrolysate was prepared from Acetes indicus which is a major bycatch among non-penaeid prawn landings of India. Hydrolysis conditions (enzyme to substrate ratio and time) for preparing protein hydrolysates using alcalase enzyme were optimized by response surface methodology using central composite design. The optimum conditions for enzyme-substrate ratio (mL/100 g) of 1.57, 1.69, 1.60, 1.56, and 1.50 and for hydrolysis time of 97.18, 96.5, 98.15 min, 102.48, and 88.44 min were established for attaining maximum yield, degree of hydrolysis, 2,2-diphenyl-1-picrylhydrazyl, angiotensin I-converting enzyme-inhibiting activity, and metal-chelating activity, respectively...
July 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28734722/guidelines-for-the-understanding-and-management-of-pain-in-chronic-pancreatitis
#2
REVIEW
Asbjørn M Drewes, Stefan A W Bouwense, Claudia M Campbell, Güralp O Ceyhan, Myriam Delhaye, Ihsan Ekin Demir, Pramod K Garg, Harry van Goor, Christopher Halloran, Shuiji Isaji, John P Neoptolemos, Søren S Olesen, Tonya Palermo, Pankaj Jay Pasricha, Andrea Sheel, Tooru Shimosegawa, Eva Szigethy, David C Whitcomb, Dhiraj Yadav
Abdominal pain is the foremost complication of chronic pancreatitis (CP). Pain can be related to recurrent or chronic inflammation, local complications or neurogenic mechanisms with corresponding changes in the nervous systems. Both pain intensity and the frequency of pain attacks have been shown to reduce quality of life in patients with CP. Assessment of pain follows the guidelines for other types of chronic pain, where the multidimensional nature of symptom presentation is taken into consideration. Quantitative sensory testing may be used to characterize pain, but is currently used in a research setting in advanced laboratories...
July 13, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28733880/effect-of-asiatic-acid-on-the-ang-ii-at1r-nadph-oxidase-nf-%C3%AE%C2%BAb-pathway-in-renovascular-hypertensive-rats
#3
Putcharawipa Maneesai, Sarawoot Bunbupha, Upa Kukongviriyapan, Laddawan Senggunprai, Veerapol Kukongviriyapan, Parichat Prachaney, Poungrat Pakdeechote
Asiatic acid, a triterpenoid compound derived from Centella asiatica, has been demonstrated to have antioxidant and anti-inflammatory effects. The present study evaluated the effects of asiatic acid on hemodynamic alterations, renin-angiotensin system (RAS), oxidative stress, and inflammation in 2K-1C hypertensive rats. Renovascular hypertension was induced in male Sprague-Dawley rats and treated with vehicle, asiatic acid (30 mg/kg/day), or captopril (5 mg/kg/day) for 4 weeks. We observed that 2K-1C hypertensive rats exhibited hemodynamic alterations such as high blood pressure, heart rate, hindlimb vascular resistance, and low hindlimb blood flow...
July 21, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28733231/tussilagonone-induced-nrf2-pathway-activation-protects-hepg2-cells-from-oxidative-injury
#4
Kyung-Mi Lee, Tae Yeon Kwon, Unwoo Kang, Eun Kyoung Seo, Ji Ho Yun, Chu Won Nho, Yeong Shik Kim
Tussilagonone is a compound derived from the medicinal plant Tussilago farfara L., which is used as a traditional medicine for respiratory diseases, including asthma and pneumonia. Recent reports suggest that tussilagonone exhibits anti-inflammatory effects; however, the scope of protective functions has not been elucidated yet. In this study, we demonstrate that tussilagonone enhances cellular detoxification by increasing quinone reductase activity in Hepa1c1c7 cells. In addition, tussilagonone decreased tert-butyl hydroperoxide(t-BHP)-induced ROS production and cell death, suggesting that it also acts as a potent antioxidant...
July 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28730645/effect-of-metformin-on-germ-cell-specific-apoptosis-oxidative-stress-and-epididymal-sperm-quality-after-testicular-torsion-detorsion-in-rats
#5
M Ghasemnejad-Berenji, M Ghazi-Khansari, I Yazdani, M Nobakht, A Abdollahi, H Ghasemnejad-Berenji, J Mohajer Ansari, S Pashapour, A R Dehpour
The study was designed to evaluate the effects of metformin on apoptosis and epididymal sperm quality in a rat testicular ischaemia/reperfusion (I/R) injury model. A total of 72 male rats were divided into four groups (n = 18 for each group): group 1 (sham-operated group), group 2 (metformin group), group 3 (torsion/detorsion [T/D] + saline) and group 4 (T/D + 300 mg kg(-1) metformin). Testicular torsion was achieved by rotating the right testis 720° in a clockwise direction for 1 hr. Tissue malondialdehyde (MDA) level and caspase-3 activity increased and the activities of catalase, superoxide dismutase and glutathione peroxidase decreased in comparison with sham-operated group 4 hr after detorsion (p < ...
July 21, 2017: Andrologia
https://www.readbyqxmd.com/read/28730560/impairment-of-ntca-gene-revealed-its-role-in-regulating-iron-homeostasis-ros-production-and-cellular-phenotype-under-iron-deficiency-in-cyanobacterium-anabaena-sp-pcc-7120
#6
Manish Singh Kaushik, Meenakshi Srivastava, Anumeha Singh, Arun Kumar Mishra
Iron deficiency ends up into several unavoidable consequences including damaging oxidative stress in cyanobacteria. NtcA is a global nitrogen regulator controls wide range of metabolisms in addition to regulation of nitrogen metabolism. In present communication, NtcA based regulation of iron homeostasis, ROS production and cellular phenotype under iron deficiency in Anabaena 7120 has been investigated. NtcA regulates the concentration dependent iron uptake by controlling the expression of furA gene. NtcA also regulated pigment synthesis and phenotypic alterations in Anabaena 7120...
August 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28730510/antiinflammation-and-antioxidant-effects-of-thalidomide-on-pulmonary-fibrosis-in-mice-and-human-lung-fibroblasts
#7
Xiaoying Dong, Xin Li, Minghui Li, Ming Chen, Qian Fan, Wei Wei
In this study, the potential effects of thalidomide (Thal) on bleomycin (BLM)-induced pulmonary fibrosis were investigated. BALB/C mice model of pulmonary fibrosis induced by an intratracheal instillation of BLM was adopted, and then was intraperitoneally injected with Thal (10, 20, 50 mg/kg) daily for 8 days, while the control and BLM-treated mouse groups were injected with a saline solution. The effects of Thal on pulmonary injury were evaluated by the lung wet/dry weight ratios and histopathological examination...
July 20, 2017: Inflammation
https://www.readbyqxmd.com/read/28730509/effect-of-a-2000-m-running-test-on-antioxidant-and-cytokine-response-in-plasma-and-circulating-cells
#8
Lucrecia Carrera-Quintanar, Lorena Funes, Miguel Sánchez-Martos, Pascual Martinez-Peinado, José M Sempere, Antoni Pons, Vicente Micol, Enrique Roche
Exercise intensity usually correlates with increased oxidative stress and enhanced cytokine production. However, it is unknown if all types of exercise that induce muscle damage can cause a parallel response in the oxidation balance and cytokine production. To this end, the effect of a 2000-m running test in a group of volunteers that regularly train in aerobic routines was studied. Different circulating parameters were measured, oxidative stress markers (protein carbonyls and malondialdehyde), antioxidant enzyme activity, and cytokine levels in plasma as well as in the main circulating cells of blood samples obtained in basal conditions and after test execution...
July 20, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28730330/effect-of-the-phosphogypsum-amendment-of-saline-and-agricultural-soils-on-growth-productivity-and-antioxidant-enzyme-activities-of-tomato-solanum-lycopersicum-l
#9
Mariem Smaoui-Jardak, Walid Kriaa, Mohamed Maalej, Mohamed Zouari, Lotfi Kamoun, Wassim Trabelsi, Ferjani Ben Abdallah, Nada Elloumi
The objective of this study was to investigate the effects of phosphogypsum (PG) amendment on the physiochemical proprieties of saline and agricultural soils along with the growth, productivity and antioxidant enzyme activities of tomato plants ( Solanum lycopersicum L.) grown on the amended soils under controlled conditions. Obtained results showed that the amendment of saline soil (H) by PG induced a decrease in pH as well as in electrical conductivity. However, for the non saline soil (MC), there was a decrease in pH associated with an increase in electrical conductivity...
July 20, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28730112/evaluation-of-antioxidants-and-argpyrimidine-in-normal-and-cataractous-lenses-in-north-indian-population
#10
Bharani K Mynampati, Sujata Ghosh, Thungapathra Muthukumarappa, Jagat Ram
AIM: To assess the level of glutathione, thioltransferase, and argpyrimidine in nuclear and cortical cataractous lenses as well as in the clear lenses in the north Indian population. METHODS: Human cataractous lenses were collected from the patients who underwent extracapsular cataract extraction surgery; clear lenses were collected from the freshly donated eye bank eyes. Antioxidant molecules such as glutathione and thioltransferase enzyme activity were measured; simultaneously in these lenses a blue fluorophore argpyrimidine, an advanced glycation end (AGE) product level was assessed using high performance liquid chromatography (HPLC)...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28729606/transcriptome-profiling-of-the-spermatheca-identifies-genes-potentially-involved-in-the-long-term-sperm-storage-of-ant-queens
#11
Ayako Gotoh, Shuji Shigenobu, Katsushi Yamaguchi, Satoru Kobayashi, Fuminori Ito, Kazuki Tsuji
Females of social Hymenoptera only mate at the beginning of their adult lives and produce offspring until their death. In most ant species, queens live for over a decade, indicating that ant queens can store large numbers of spermatozoa throughout their long lives. To reveal the prolonged sperm storage mechanisms, we identified enriched genes in the sperm-storage organ (spermatheca) relative to those in body samples in Crematogaster osakensis queens using the RNA-sequencing method. The genes encoding antioxidant enzymes, proteases, and extracellular matrix-related genes, and novel genes that have no similar sequences in the public databases were identified...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729393/time-course-effects-of-aerobic-physical-training-in-the-prevention-of-cigarette-smoke-induced-copd
#12
Alessandra Choqueta Toledo-Arruda, Rodolfo Paula Vieira, Flavia Alessandra Guarnier, Camila Liyoko Suehiro, Agostinho Caleman-Neto, Clarice Rosa Olivo, Petra Mello Motta Arantes, Francine Maria Almeida, Fernanda Degobbi Tenorio Quirino Dos Santos Lopes, Ercy Mara Cipulo Ramos, Rubens Cecchini, Chin Jia Lin, Mílton A Martins
A previous study by our group showed that regular exercise training (ET) attenuated pulmonary injury in an experimental model of chronic exposure to cigarette smoke (CS) in mice, but the time-course effects of the mechanisms involved in this protection remain poorly understood. We evaluated the temporal effects of regular ET in an experimental model of chronic CS exposure. MaleC57BL/6 mice were divided into four groups: Control (sedentary+air), Exercise (aerobic training+air), Smoke (sedentary+smoke) and Smoke+Exercise (aerobic training+smoke)...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28729172/ascorbic-acid-supplementation-partially-prevents-the-delayed-reproductive-development-in-juvenile-male-rats-exposed-to-rosuvastatin-since-prepuberty
#13
Gabriel Adan Araújo Leite, Thamiris Moreira Figueiredo, Marciana Sanabria, Ana Flávia Mota Gonçalves Dias, Patrícia Villela E Silva, Airton da Cunha Martins, Fernando Barbosa, Wilma De Grava Kempinas
Dyslipidemias are occurring earlier in the population due to the increase of obesity and bad eating habits. Rosuvastatin inhibits the enzyme HMG-CoA reductase, decreasing total cholesterol. Ascorbic acid is an important antioxidant compound for male reproductive system. This study aimed to evaluate whether ascorbic acid supplementation may prevent the reproductive damage provoked by rosuvastatin administration at prepuberty. Male pups were distributed into six experimental groups that received saline solution 0...
July 17, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28728562/low-oxygen-tension-increases-mitochondrial-membrane-potential-and-enhances-expression-of-antioxidant-genes-and-implantation-protein-of-mouse-blastocyst-cultured-in-vitro
#14
Yun-Yi Ma, Huei-Wen Chen, Chii-Ruey Tzeng
BACKGROUND: In human IVF, embryos cultured with a lower O2 tension (5%) can give rise to higher success rates when compared with normoxic conditions (20%). However, the mechanisms behind the beneficial effects of reduced oxygen tension in embryogenesis remain unclear. The aim of this study was to evaluate the expression of oxygen related and antioxidant genes and mitochondrial function in mouse embryo cultured under hypoxic and normoxic conditions, to investigate the beneficial effect of low oxygen tension in preimplantation embryogenesis...
July 20, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28728079/probucol-ameliorates-renal-injury-in-diabetic-nephropathy-by-inhibiting-the-expression-of-the-redox-enzyme-p66shc
#15
Shikun Yang, Li Zhao, Yachun Han, Yu Liu, Chao Chen, Ming Zhan, Xiaofen Xiong, Xuejing Zhu, Li Xiao, Chun Hu, Fuyou Liu, Zhiguang Zhou, Yashpal S Kanwar, Lin Sun
AIMS: Probucol is an anti-hyperlipidemic agent and a potent antioxidant drug that can delay progression of diabetic nephropathy (DN) and reverses renal oxidative stress in diabetic animal models; however, the mechanisms underlying these effects remain unclear. p66Shc is a newly recognized mediator of mitochondrial ROS production in renal cells under high-glucose (HG) ambience. We previously showed that p66Shc can serve as a biomarker for renal oxidative injury in DN patients and that p66Shc up-regulation is correlated with renal damage in vivo and in vitro...
July 4, 2017: Redox Biology
https://www.readbyqxmd.com/read/28728048/accumulation-and-detoxification-dynamics-of-chromium-and-antioxidant-responses-in-juvenile-rare-minnow-gobiocypris-rarus
#16
Cong Yuan, Meng Li, Yao Zheng, Ying Zhou, Feili Wu, Zaizhao Wang
Hexavalent chromium (Cr(6+)) compounds are hazardous via all exposure routes. To explore the dynamics of Cr accumulation and elimination and to reveal the mechanisms underlying detoxification and antioxidation in juvenile Gobiocypris rarus, one-month old G. rarus larvae were exposed to 0.1mgL(-1) Cr(6+) for four weeks for accumulation and subsequently placed to clean water for another week for depuration. The contents of Cr were measured weekly in the whole body of G. rarus juveniles. The activities of catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD), glutathione S-transferase (GST) and glutathione reductase (GR), and contents of glutathione (GSH) and malonaldehyde (MDA), and transcripts of cat, Cu/Zn-sod, Mn-sod, gpx1, gstpi, gr, mt1, nrf2 and uba52 were determined...
July 11, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28727098/transport-stress-induced-cerebrum-oxidative-stress-is-not-mitigated-by-activating-the-nrf2-antioxidant-defense-response-in-newly-hatched-chicks
#17
J Ge, H Li, F Sun, X-N Li, J Lin, J Xia, C Zhang, J-L Li
Transportation of newly hatched chicks from the hatchery to the farm is inevitable, especially for parent stock and grandsire parent stock chicks. However, the possible effects of transport stress in the newly hatched chicks are poorly understood. The aim of this study was to determine the adaptive responses to transport stress by activing the nuclear factor-erythroid 2-related factor 2 (Nrf2)-induced antioxidant defense. One hundred twenty newly hatched chicks were divided into 3 groups (control group, transport group, and simulation transport group) for 2, 4, and 8 h of real or simulated transportation...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726984/physiology-and-endocrinology-symposium-alterations-in-uteroplacental-hemodynamics-during-melatonin-supplementation-in-sheep-and-cattle
#18
C O Lemley, K A Vonnahme
Compromised placental function can result in fetal growth restriction which is associated with greater risk of neonatal morbidity and mortality. Large increases in transplacental nutrient and waste exchange, which support the exponential increase in fetal growth during the last half of gestation, are dependent primarily on the rapid growth and vascularization of the uteroplacenta. The amplitude of melatonin secretion has been associated with improved oxidative status and altered cardiovascular function in several mammalian species; however, melatonin mediated alterations of uteroplacental capacity in sheep and cattle are lacking...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726777/humanin-g-hng-protects-age-related-macular-degeneration-amd-transmitochondrial-arpe-19-cybrids-from-mitochondrial-and-cellular-damage
#19
Sonali Nashine, Pinchas Cohen, Marilyn Chwa, Stephanie Lu, Anthony B Nesburn, Baruch D Kuppermann, M Cristina Kenney
Age-related macular degeneration (AMD) ranks third among the leading causes of visual impairment with a blindness prevalence rate of 8.7%. Despite several treatment regimens, such as anti-angiogenic drugs, laser therapy, and vitamin supplementation, being available for wet AMD, to date there are no FDA-approved therapies for dry AMD. Substantial evidence implicates mitochondrial damage and retinal pigment epithelium (RPE) cell death in the pathogenesis of AMD. However, the effects of AMD mitochondria and Humanin G (HNG), a more potent variant of the mitochondrial-derived peptide (MDP) Humanin, on retinal cell survival have not been elucidated...
July 20, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28726715/overexpression-of-the-osimp-gene-increases-the-accumulation-of-inositol-and-confers-enhanced-cold-tolerance-in-tobacco-through-modulation-of-the-antioxidant-enzymes-activities
#20
Rong-Xiang Zhang, Li-Jun Qin, De-Gang Zhao
Inositol is a cyclic polyol that is involved in various physiological processes, including signal transduction and stress adaptation in plants. l-myo-inositol monophosphatase (IMPase) is one of the metal-dependent phosphatase family members and catalyzes the last reaction step of biosynthesis of inositol. Although increased IMPase activity induced by abiotic stress has been reported in chickpea plants, the role and regulation of the IMP gene in rice (Oryza sativa L.) remains poorly understood. In the present work, we obtained a full-length cDNA sequence coding IMPase in the cold tolerant rice landraces in Gaogonggui, which is named as OsIMP...
July 20, 2017: Genes
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