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https://www.readbyqxmd.com/read/28436420/key-role-of-15-lo-15-hete-in-angiogenesis-and-functional-recovery-in-later-stages-of-post-stroke-mice
#1
Di Wang, Yu Liu, Li Chen, Pengyan Li, Youyang Qu, Yanmei Zhu, Yulan Zhu
This study sought to clarify the effects of 15-lipoxygenase/15-hydroxyeicosatetraenoic acid in angiogenesis and neurological functional recovery after cerebral ischaemic stroke in mice. In vivo, we performed behavioural tests to determine functional recovery after stroke. Double immunofluorescence staining of CD31 and Ki67/PCNA was performed to evaluate the effects of 15-lipoxygenase/15-hydroxyeicosatetraenoic acid on angiogenesis in an MCAO mouse model. In vitro, we investigated the effects of 15-hydroxyeicosatetraenoic acid on BMVEC proliferation and migration...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28411230/interaction-of-12-15-lipoxygenase-with-fatty-acids-alters-the-leukocyte-kinetics-leading-to-improved-post-myocardial-infarction-healing
#2
Ganesh V Halade, Vasundhara Kain, Kevin A Ingle, Sumanth D Prabhu
The metabolic transformation of fatty acids to form oxylipids using 12/15lipoxygenase (LOX) can promote either resolving or non-resolving inflammation. However, the mechanism of how 12/15LOX interacts with PUFA (polyunsaturated fatty acids) in post-myocardial infarction (MI) healing is unclear. Here, we reported the role of 12/15LOX in post-MI cardiac remodeling in a PUFA (10% w/w, 22 Kcal) enriched environment. Wild-type (WT; C57BL/6J) and 12/15LOX null (12/15LOX(-/-)) male mice of 8-12-weeks age were fed PUFA-enriched diet for 1 month and subjected to permanent coronary artery ligation...
April 14, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28409415/%C3%AE-aminobutyric-acid-gaba-confers-chromium-stress-tolerance-in-brassica-juncea-l-by-modulating-the-antioxidant-defense-and-glyoxalase-systems
#3
Jubayer Al Mahmud, Mirza Hasanuzzaman, Kamrun Nahar, Anisur Rahman, Md Shahadat Hossain, Masayuki Fujita
Chromium (Cr) toxicity is hazardous to the seed germination, growth, and development of plants. γ-aminobutyric acid (GABA) is a non-protein amino acid and is involved in stress tolerance in plants. To investigate the effects of GABA in alleviating Cr toxicity, we treated eight-d-old mustard (Brassica juncea L.) seedlings with Cr (0.15 and 0.3 mM K2CrO4, 5 days) alone and in combination with GABA (125 µM) in a semi-hydroponic medium. The roots and shoots of the seedlings accumulated Cr in a dose-dependent manner, which led to an increase in oxidative damage [lipid peroxidation; hydrogen peroxide (H2O2) content; superoxide (O2(•-)) generation; lipoxygenase (LOX) activity], methylglyoxal (MG) content, and disrupted antioxidant defense and glyoxalase systems...
April 13, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28403941/obesity-is-positively-associated-with-arachidonic-acid-derived-5-and-11-hydroxyeicosatetraenoic-acid-hete
#4
Charles Austin Pickens, Lorraine M Sordillo, Chen Zhang, Jenifer I Fenton
BACKGROUND: Oxylipids are oxygenated polyunsaturated fatty acid (PUFA) metabolites that are responsible for the onset and resolution of the inflammatory response. Enzymatic oxygenation through the lipoxygenase (LOX) or cytochrome P450 (CYP) pathways can form oxylipids that have either proinflammatory or proresolving functions depending on the type of PUFA substrate and degree of metabolism. The objective of this study was to determine how PUFA substrates and their corresponding oxylipids are associated with obesity...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28393703/mir-106a-is-associated-with-diabetic-peripheral-neuropathy-through-the-regulation-of-12-15-lox-mediated-oxidative-nitrative-stress
#5
Yuanbo Wu, Dandan Xu, Xiang Zhu, Guangwei Yang, Mingshan Ren
BACKGROUND: Diabetic peripheral neuropathy (DPN) is a common complication of diabetes that with a complex pathogenesis. Study has reported that oxidative stress and nitrative stress were all involved in the DPN, however, the mechanism between them was still unclear. In the present study, we investigated whether miR-106a signaling regulated 12/15-Lipoxygenase (12/15-LOX) on oxidative/nitrative stress in DPN. METHODS: Dorsal root ganglion (DRG) was isolated from 10 healthy mice and 10 DPN mice...
April 4, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28386601/on-the-mechanism-of-cytoprotection-by-ferrostatin-1-and-liproxstatin-1-and-the-role-of-lipid-peroxidation-in-ferroptotic-cell-death
#6
Omkar Zilka, Ron Shah, Bo Li, José Pedro Friedmann Angeli, Markus Griesser, Marcus Conrad, Derek A Pratt
Ferroptosis is a form of regulated necrosis associated with the iron-dependent accumulation of lipid hydroperoxides that may play a key role in the pathogenesis of degenerative diseases in which lipid peroxidation has been implicated. High-throughput screening efforts have identified ferrostatin-1 (Fer-1) and liproxstatin-1 (Lip-1) as potent inhibitors of ferroptosis - an activity that has been ascribed to their ability to slow the accumulation of lipid hydroperoxides. Herein we demonstrate that this activity likely derives from their reactivity as radical-trapping antioxidants (RTAs) rather than their potency as inhibitors of lipoxygenases...
March 22, 2017: ACS Central Science
https://www.readbyqxmd.com/read/28375641/a-pilot-study-to-examine-the-effects-of-an-anti-inflammatory-supplement-on-eicosanoid-derivatives-in-patients-with-chronic-kidney-disease
#7
Brian D Shelmadine, Rodney G Bowden, Jennifer J Moreillon, Matthew B Cooke, Peiying Yang, Erika Deike, Jackson O Griggs, Ron L Wilson
BACKGROUND: Chronic kidney disease (CKD) is a progressive disease with an inverse relationship between kidney function and levels of inflammation and oxidative stress. Curcumin and Boswellia serrata have been reported to exert anti-inflammatory effects on the cyclooxygenase and lipoxygenase pathways. Therefore, the purpose of this study was to study the effects of a supplement containing curcumin and B. serrata on eicosanoid derivatives in early stage CKD patients who had not initiated hemodialysis...
April 4, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28356517/protectin-d1n-3-dpa-and-resolvin-d5n-3-dpa-are-effectors-of-intestinal-protection
#8
Thomas Gobbetti, Jesmond Dalli, Romain A Colas, Donata Federici Canova, Marius Aursnes, Delphine Bonnet, Laurent Alric, Nathalie Vergnolle, Celine Deraison, Trond V Hansen, Charles N Serhan, Mauro Perretti
The resolution of inflammation is an active process orchestrated by specialized proresolving lipid mediators (SPM) that limit the host response within the affected tissue; failure of effective resolution may lead to tissue injury. Because persistence of inflammatory signals is a main feature of chronic inflammatory conditions, including inflammatory bowel diseases (IBDs), herein we investigate expression and functions of SPM in intestinal inflammation. Targeted liquid chromatography-tandem mass spectrometry-based metabololipidomics was used to identify SPMs from n-3 polyunsaturated fatty acids in human IBD colon biopsies, quantifying a significant up-regulation of the resolvin and protectin pathway compared with normal gut tissue...
April 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28351645/targeting-of-12-15-lipoxygenase-in-retinal-endothelial-cells-but-not-in-monocytes-macrophages-attenuates-high-glucose-induced-retinal-leukostasis
#9
Ahmed S Ibrahim, Heba Saleh, Mohamed El-Shafey, Khaled A Hussein, Khaled El-Masry, Babak Baban, Nader Sheibani, Mong-Heng Wang, Amany Tawfik, Mohamed Al-Shabrawey
AIMS: Our previous studies have established a role for 12/15-lipoxygenase (LO) in mediating the inflammatory response in diabetic retinopathy (DR). However, the extent at which the local or systemic induction of 12/15-LO activity involved is unclear. Thus, the current study aimed to characterize the relative contribution of retinal endothelial versus monocytic/macrophagic 12/15-LO to inflammatory responses in DR. MATERIALS & METHODS: We first generated a clustered heat map for circulating bioactive lipid metabolites in the plasma of streptozotocin (STZ)-induced diabetic mice using liquid chromatography coupled with mass-spectrometry (LC-MS) to evaluate changes in circulating 12/15-LO activity...
March 27, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28347845/global-assessment-of-oxidized-free-fatty-acids-in-brain-reveals-an-enzymatic-predominance-to-oxidative-signaling-after-trauma
#10
Tamil S Anthonymuthu, Elizabeth M Kenny, Andrew A Amoscato, Jesse Lewis, Patrick M Kochanek, Valerian E Kagan, Hülya Bayır
Traumatic brain injury (TBI) is a major health problem associated with significant morbidity and mortality. The pathophysiology of TBI is complex involving signaling through multiple cascades, including lipid peroxidation. Oxidized free fatty acids, a prominent product of lipid peroxidation, are potent cellular mediators involved in induction and resolution of inflammation and modulation of vasomotor tone. While previous studies have assessed lipid peroxidation after TBI, to our knowledge no studies have used a systematic approach to quantify the global oxidative changes in free fatty acids...
March 24, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28344594/articular-inflammation-induced-by-an-enzymatically-inactive-lys49-phospholipase-a2-activation-of-endogenous-phospholipases-contributes-to-the-pronociceptive-effect
#11
Renata Gonçalves Dias, Sandra Coccuzzo Sampaio, Morena Brazil Sant'Anna, Fernando Queiroz Cunha, José María Gutiérrez, Bruno Lomonte, Yara Cury, Gisele Picolo
BACKGROUND: Arthritis is a set of inflammatory conditions that induce aching, stiffness, swelling, pain and may cause functional disability with severe consequences to the patient's lives. These are multi-mediated pathologies that cannot be effectively protected and/or treated. Therefore, the aim of this study was to establish a new model of acute arthritis, using a Lys49-PLA2 (Bothrops asper myotoxin II; MT-II) to induce articular inflammation. METHODS: The articular inflammation was induced by MT-II (10 μg/joint) injection into the left tibio-tarsal or femoral-tibial-patellar joints...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28339608/inhibition-of-arachidonate-15-lipoxygenase-prevents-4-hydroxynonenal-induced-protein-damage-in-male-germ-cells%C3%A2
#12
Elizabeth G Bromfield, Bettina P Mihalas, Matthew D Dun, R John Aitken, Eileen A McLaughlin, Jessica L H Walters, Brett Nixon
Lipid peroxidation products, such as 4-hydroxynonenal (4HNE), are causative agents responsible for extensive protein damage within the male and female germlines. Recently, we have demonstrated that 4HNE production can initiate the proteolytic degradation of the molecular chaperone Heat Shock Protein A2 (HSPA2) in male germ cells. These events may be partially responsible for HSPA2 deficiency in the spermatozoa of patients that repeatedly fail in vitro fertilization. Given this, mechanisms that limit the production of 4HNE will be highly advantageous for the preservation of male fertility...
March 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28318946/easy-and-rapid-preparation-of-benzoylhydrazides-and-their-diazene-derivatives-as-inhibitors-of-15-lipoxygenase
#13
Cristian Tirapegui, Williams Acevedo-Fuentes, Pablo Dahech, Claudia Torrent, Pablo Barrias, Macarena Rojas-Poblete, Carolina Mascayano
Two series of diaza derivatives were prepared by solvent-free condensation of benzoic acid and 4-substituted phenylhydrazines in order to obtain phenylhydrazides (HYD series) and, by oxidation of these compounds, the corresponding benzoyldiazenes (DIA series). Both sets were evaluated as inhibitors of soybean 15-lipoxygenase activity and antioxidant capability in the FRAP and CUPRAC assays. The most potent inhibitors of both series exhibited IC50 values in the low micromolar range. Kinetic studies showed that at least the more active compounds were competitive inhibitors...
March 8, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28314621/docosahexaenoic-acid-dha-an-essential-nutrient-and-a-nutraceutical-for-brain-health-and-diseases
#14
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
https://www.readbyqxmd.com/read/28303711/phenolic-elderberry-extracts-anthocyanins-procyanidins-and-metabolites-influence-glucose-and-fatty-acid-uptake-in-human-skeletal-muscle-cells
#15
Giang Thanh Thi Ho, Eili Tranheim Kase, Helle Wangensteen, Hilde Barsett
Uptake of glucose and fatty acids in skeletal muscle is of interest for type 2 diabetes treatment. The aim was to study glucose and fatty acid uptake in skeletal muscle cells, antioxidant effects, and inhibition of carbohydrate-hydrolyzing enzymes by elderberries. Enhanced glucose and oleic acid uptake in human skeletal muscle cells were observed after treatment with phenolic elderberry extracts, anthocyanins, procyanidins, and their metabolites. The 96% EtOH and the acidified MeOH extracts were highly active...
March 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28302406/docosahexaenoic-acid-in-the-treatment-of-rheumatoid-arthritis-a%C3%A2-double-blind-placebo-controlled-randomized-cross-over-study-with-microalgae-vs-sunflower-oil
#16
C Dawczynski, M Dittrich, T Neumann, K Goetze, A Welzel, P Oelzner, S Völker, A M Schaible, F Troisi, L Thomas, S Pace, A Koeberle, O Werz, P Schlattmann, S Lorkowski, G Jahreis
The potential of fish or fish oil as supplier for eicosapentaenoic acid (EPA, C20:5n3) and docosahexaenoic acid (DHA, C22:6n3) for reducing cardiovascular risk factors and supporting therapy of chronic inflammatory diseases, has been investigated intensively, but our knowledge about the physiological effects of the individual compounds EPA and DHA are limited. STUDY DESIGN: In this double-blind pilot study, thirty-eight patients with defined RA were allocated to consume foods enriched with microalgae oil from Schizochytrium sp...
March 6, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28289905/expression-profile-of-desiccation-tolerance-factors-in-intertidal-seaweed-species-during-the-tidal-cycle
#17
Camila Fierro, Camilo López-Cristoffanini, Andrés Meynard, Carlos Lovazzano, Francisco Castañeda, Eduardo Guajardo, Loretto Contreras-Porcia
The transcriptional modulation of desiccation tolerance factors in P. orbicularis explains its successful recuperation after water deficit. Differential responses to air exposure clarify seaweed distribution along intertidal rocky zones. Desiccation-tolerant seaweed species, such as Pyropia orbicularis, can tolerate near 96% water loss during air exposure. To understand the phenotypic plasticity of P. orbicularis to desiccation, several tolerance factors were assessed by RT-qPCR, Western-blot analysis, and enzymatic assays during the natural desiccation-rehydration cycle...
March 13, 2017: Planta
https://www.readbyqxmd.com/read/28278642/biogenic-guaianolide-type-sesquiterpene-lactones-with-antioxidative-and-anti-inflammatory-properties-from-natural-mangrove-hybrid-rhizophora-annamalayana
#18
Vamshi Krishna Raola, Kajal Chakraborty
Previously undescribed guaianolide-type sesquiterpene lactones were isolated from the chloroform fraction of the natural hybrid mangrove Rhizophora annamalayana, and were characterised as (Z)-3α,4,5,6-tetrahydro-5α-isobutyl-2β-(methoxymethyl)-7-methyl-3H-cyclohepta[b]carbolactone (1) and (7Z)-isopentyl 3α,4,5,6,7,8-hexahydro-2β-((E)-11-methylbut-10-enyl)-1-oxo-2H-cyclohepta[b]furan-6-carboxylate (2). Compound 2 displayed greater antioxidative activities {1, 1-diphenyl-2-picrylhydrazyl (DPPH) and 2, 2'-azino-bis-3 ethylbenzothiozoline-6-sulphonic acid diammonium salt (ABTS), IC50 0...
February 24, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28272321/metabolite-profiling-of-eastern-teaberry-gaultheria-procumbens-l-lipophilic-leaf-extracts-with-hyaluronidase-and-lipoxygenase-inhibitory-activity
#19
Piotr Michel, Aleksandra Owczarek, Magdalena Matczak, Martyna Kosno, Paweł Szymański, Elżbieta Mikiciuk-Olasik, Anna Kilanowicz, Wiktor Wesołowski, Monika A Olszewska
The phytochemical profile and anti-inflammatory activity of Gaultheria procumbens dry lipophilic leaf extracts were evaluated. Forty compounds were identified by GC-MS, representing 86.36% and 81.97% of the petroleum ether (PE) and chloroform (CHE) extracts, respectively, with ursolic acid (28.82%), oleanolic acid (10.11%), methyl benzoate (10.03%), and methyl salicylate (6.88%) dominating in CHE, and methyl benzoate (21.59%), docosane (18.86%), and octacosane (11.72%) prevailing in PE. Three components of CHE were fully identified after flash chromatography isolation and spectroscopic studies as (6S,9R)-vomifoliol (4...
March 6, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28260647/a-lipidomic-study-on-the-regulation-of-inflammation-and-oxidative-stress-targeted-by-marine-%C3%AF-3-pufa-and-polyphenols-in-high-fat-high-sucrose-diets
#20
Gabriel Dasilva, Manuel Pazos, Eduardo García-Egido, José M Gallardo, Sara Ramos-Romero, Josep Lluís Torres, Marta Romeu, María-Rosa Nogués, Isabel Medina
The ability of polyphenols to ameliorate potential oxidative damage of ω-3 PUFAs when they are consumed together and then, to enhance their potentially individual effects on metabolic health is discussed through the modulation of fatty acids profiling and the production of lipid mediators. For that, the effects of the combined consumption of fish oils and grape seed procyanidins on the inflammatory response and redox unbalance triggered by high-fat high-sucrose (HFHS) diets were studied in an animal model of Wistar rats...
February 21, 2017: Journal of Nutritional Biochemistry
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