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Stéphanie Leruez, Thomas Bresson, Juan M Chao de la Barca, Alexandre Marill, Grégoire de Saint Martin, Adrien Buisset, Jeanne Muller, Lydie Tessier, Cédric Gadras, Christophe Verny, Patrizia Amati-Bonneau, Guy Lenaers, Philippe Gohier, Dominique Bonneau, Gilles Simard, Dan Milea, Vincent Procaccio, Pascal Reynier
Purpose: To determine the plasma metabolomic signature of the exfoliative syndrome (XFS), the most common cause worldwide of secondary open-angle glaucoma. Methods: We performed a targeted metabolomic study, using the standardized p180 Biocrates Absolute IDQ p180 kit with a QTRAP 5500 mass spectrometer, to compare the metabolomic profiles of plasma from individuals with XFS (n = 16), and an age- and sex-matched control group with cataract (n = 18). Results: A total of 151 metabolites were detected correctly, 16 of which allowed for construction of an OPLS-DA model with a good predictive capability (Q2cum = 0...
February 1, 2018: Investigative Ophthalmology & Visual Science
Andrei Mocan, Cadmiel Moldovan, Gökhan Zengin, Onur Bender, Marcello Locatelli, Mario Simirgiotis, Arzu Atalay, Dan C Vodnar, Sascha Rohn, Gianina Crișan
Goji (Lycium barbarum L.) berries are emphasized as healthy food or are used widely as dietary supplements. In the present study, the antioxidant and enzyme inhibitory activities of berries extracts from two selected Romanian cultivars (cv. Erma and cv. Biglifeberry) have been evaluated. UHPLC-QTOF-MS analysis results revealed the presence of vitamin C and related compounds, phenolic acids, flavonoids, fatty acids (oxylipins), and spermidine derivatives. In particular, cv. Erma showed a strong tyrosinase-inhibitory effect, whereas cv...
February 12, 2018: Food and Chemical Toxicology
Xinna Wang, Yawei Liang, Yaqi Wang, Mingqin Fan, Yanni Sun, Jianli Liu, Ning Zhang
We described a simple, rapid, selective and sensitive HPLC method coupled with fluorescence detection (HPLC-FLD) for simultaneous determination of ten kinds of biogenic amines (BAs: tryptamine, 2-phenethylamine, putrescine, cadaverine, histamine, 5-hydroxytryptamine, tyramine, spermidine, dopamine, spermine). BAs and I.S were derivated with dansyl chloride. A fluorescence detection (λex/λem = 340/510 nm) was used. A satisfactory result of method validation was obtained. The assay was shown to be linear over the range of 0...
February 15, 2018: Biomedical Chromatography: BMC
W Brooks
"Polyamine patterns in plasma of patients with systemic lupus erythematosus and fever" by Kim et al. provides insight into possible involvement of polyamines in systemic lupus erythematosus (SLE). The authors report decreases in N1-acetylspermidine, spermidine, spermine, and N1-acetylcadaverine and increased cadaverine in SLE. Polyamine involvement in many cellular processes and their unique characteristics (high charge, length, flexibility, and ubiquity) give polyamines importance in health and disease...
January 1, 2018: Lupus
Manuela Cervelli, Alessia Leonetti, Guglielmo Duranti, Stefania Sabatini, Roberta Ceci, Paolo Mariottini
Skeletal muscle comprises approximately 40% of the total body mass. Preserving muscle health and function is essential for the entire body in order to counteract chronic diseases such as type II diabetes, cardiovascular diseases, and cancer. Prolonged physical inactivity, particularly among the elderly, causes muscle atrophy, a pathological state with adverse outcomes such as poor quality of life, physical disability, and high mortality. In murine skeletal muscle C2C12 cells, increased expression of the spermine oxidase (SMOX) enzyme has been found during cell differentiation...
February 14, 2018: Medical Sciences: Open Access Journal
Leena Mattsson, Jingjing Xu, Claudia Preininger, Bernadette Tse Sum Bui, Karsten Haupt
We developed a competitive fluorescent molecularly imprinted polymer (MIP) assay to detect biogenic amines in fish samples. MIPs synthesized by precipitation polymerization using histamine as template were used in a batch binding assay analogous to competitive fluoroimmunoassays. Introducing a complex sample matrix, such as fish extract, into the assay changes the environment and the binding conditions, therefore the importance of the sample preparation is extensively discussed. Several extraction and purification methods for fish were comprehensively studied, and an optimal clean-up procedure for fish samples using liquid-liquid extraction was developed...
May 1, 2018: Talanta
Yujiao Ji, Qiuping Guo, Yulong Yin, Francois Blachier, Xiangfeng Kong
Background: Pregnancy is associated with important changes in gut microbiota composition. Dietary factors may affect the diversity, composition, and metabolic activity of the intestinal microbiota. Among amino acids, proline is known to play important roles in protein metabolism and structure, cell differentiation, conceptus growth and development, and gut microbiota re-equilibration in case of dysbiosis. Results: Dietary supplementation with 1% proline decreased (P < 0...
2018: Journal of Animal Science and Biotechnology
Chantal Reigada, Otto Phanstiel, Mariana R Miranda, Claudio A Pereira
Polyamines play critical roles as regulators of cell growth and differentiation. In contrast with other protozoa, the human parasite Trypanosoma cruzi, the etiological agent of Chagas disease, is auxotrophic for polyamines. Therefore, their intracellular availability depends exclusively on polyamine transport and inhibition of these uptake processes can alter the viability of the parasite. The polyamine analogues used in this work were successfully tested as antiproliferative agents in cancer cells, bacteria, fungi and also showed a potent antiplasmodial effect...
January 31, 2018: European Journal of Medicinal Chemistry
Flávia Beatriz Custódio, Milton C Vasconcelos-Neto, Karine H Theodoro, Renan Campos Chisté, Maria Beatriz A Gloria
Pork loin and leg were evaluated 24h after slaughter and during refrigerated (5°C) and frozen storage for microbial counts, pH, total volatile base nitrogen (TVB-N), thiobarbituric acid reactive substances (TBARS) and bioactive amines. Spermine was the prevalent amine in fresh pork loin and leg, followed by spermidine and agmatine. During refrigerated storage, pH, TVB-N, mesophilic and psychrotrophic counts increased and no changes (p<0.05) were observed on polyamines; however putrescine, cadaverine and histamine were produced and accumulated throughout storage...
January 10, 2018: Meat Science
Runhui Ke, Zongsu Wei, Christian Bogdal, Recep Kaya Göktaş, Ruiyang Xiao
Biogenic amines (BAs), a class of nitrogenous compounds that are frequently detected in wine, pose adverse effects to humans. However, with the largest red wine consumption in the world, little is known about national profiles correlating BAs in wines to toxicological/health risks in China. In this study, we conducted a nationwide survey of commercially available wines for the occurrence of BAs. Our sampling campaign covered >90% of wine brands (n = 456) in China in a three year span (2014-2016). The target BAs included tryptamine, phenylethylamine, putrescine, cadaverine, histamine, tyramine, spermidine and spermine...
June 1, 2018: Food Chemistry
Yasser Y Lenis, Gregory A Johnson, Xiaoqiu Wang, Wendy W Tang, Kathrin A Dunlap, M Carey Satterfield, Guoyao Wu, Thomas R Hansen, Fuller W Bazer
Background: Polyamines stimulate DNA transcription and mRNA translation for protein synthesis in trophectoderm cells, as well as proliferation and migration of cells; therefore, they are essential for development and survival of conceptuses (embryo/fetus and placenta). The ovine conceptus produces polyamines via classical and non-classical pathways. In the classical pathway, arginine (Arg) is transformed into ornithine, which is then decarboxylated by ornithine decarboxylase (ODC1) to produce putrescine which is the substrate for the production of spermidine and spermine...
2018: Journal of Animal Science and Biotechnology
Pooja Jadiya, Snober S Mir, Aamir Nazir
The accumulation of aggregate-prone proteins is a major representative of many neurological disorders, including Parkinson's disease (PD) wherein the cellular clearance mechanisms, such as the ubiquitin-proteasome and autophagy pathways are impaired. PD, known to be associated with multiple genetic and environmental factors, is characterized by the aggregation of α-synuclein protein and loss of dopaminergic neurons in midbrain. This disease is also associated with other cardiovascular ailments. Herein, we report our findings from studies on the effect of hyper and hypo-osmotic induced toxicity representing hyper and hypotensive condition as an extrinsic epigenetic factor towards modulation of Parkinsonism, using a genetic model Caenorhabditis elegans (C...
February 2, 2018: Cellular Signalling
Jens-Ole Bartz, Jochen Blom, Hans-Jürgen Busse, Jacques B Mvie, Martin Hardt, Patrick Schubert, Thomas Wilke, Alexander Goessmann, Gottfried Wilharm, Jennifer Bender, Peter Kämpfer, Stefanie P Glaeser
Two Gram-stain-negative, facultative anaerobic, motile, rod-shaped strains, S-B4-1UT and JOB-63a, forming small whitish transparent colonies on marine agar, were isolated from a sponge of the genus Haliclona. The strains shared 99.7% 16S rRNA gene sequence identity and a DNA-DNA hybridization value of 100%, but were differentiated by genomic fingerprinting using rep-PCRs. 16S rRNA gene sequence phylogeny placed the strains as a sister branch to the monophyletic genus Endozoicomonas (Oceanospirillales; Gammaproteobacteria) with 92...
December 22, 2017: Systematic and Applied Microbiology
Jan Gimsa, Philipp Wysotzki, Šarka Perutkova, Thomas Weihe, Patrick Elter, Piotr E Marszalek, Veronika Kralj-Iglič, Torsten Müller, Ales Iglic
The ubiquitous molecule spermidine is known for its pivotal roles in the contact mediation, fusion and reorganization of biological membranes and DNA. In our model system, borosilicate beads were attached to atomic-force microscopy (AFM) cantilevers and used to probe mica surfaces in order to study the details of the spermidine-induced attractions. The negative surface charges of both materials were largely constant over the measured pH range of pH 7.8 to 12. The repulsion observed between the surfaces turned into attraction after the addition of spermidine...
January 30, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Frank Madeo, Tobias Eisenberg, Federico Pietrocola, Guido Kroemer
Interventions that delay aging and protect from age-associated disease are slowly approaching clinical implementation. Such interventions include caloric restriction mimetics, which are defined as agents that mimic the beneficial effects of dietary restriction while limiting its detrimental effects. One such agent, the natural polyamine spermidine, has prominent cardioprotective and neuroprotective effects and stimulates anticancer immunosurveillance in rodent models. Moreover, dietary polyamine uptake correlates with reduced cardiovascular and cancer-related mortality in human epidemiological studies...
January 26, 2018: Science
Bartosz Sekula, Zbigniew Dauter
Polyamines are linear polycationic compounds that play a crucial role in the growth and development of higher plants. One triamine (spermidine, SPD) and two tetraamine isomers (spermine, SPM, and thermospermine, TSPM) are obtained by the transfer of the aminopropyl group from decarboxylated S-adenosylmethionine to putrescine and SPD. These reactions are catalyzed by the specialized aminopropyltransferases. In that respect plants are unique eukaryotes that have independently evolved two enzymes, thermospermine synthase (TSPS), encoded by the gene ACAULIS5 , and spermine synthase, that produce TSPM and SPM, respectively...
January 24, 2018: Biochemical Journal
Luís Gaspar, Ross P Coron, Paul KongThoo Lin, David M Costa, Begoña Péres-Cabezas, Joana Tavares, Meritxell Roura-Ferrer, Isbaal Ramos, Céline Ronin, Louise L Major, Fabrice Ciesielski, Iain K Pemberton, Jane MacDougall, Paola Ciapetti, Terry K Smith, Anabela Cordeiro-da-Silva
Chagas disease remains one of the most neglected diseases in the world despite being the most important parasitic disease in Latin America. The characteristic chronic manifestation of chagasic cardiomyopathy is the region's leading cause of heart-related illness, causing significant mortality and morbidity. Due to the limited available therapeutic options, new drugs are urgently needed to control the disease. Sirtuins, also called Silent information regulator 2 (Sir2) proteins have long been suggested as interesting targets to treat different diseases, including parasitic infections...
January 22, 2018: PLoS Neglected Tropical Diseases
Matthias Cuykx, Leen Claes, Robim M Rodrigues, Tamara Vanhaecke, Adrian Covaci
Non-alcoholic Fatty Liver Disease (NAFLD) is a frequently encountered Drug-Induced Liver Injury (DILI). Although this stage of the disease is reversible, it can lead to irreversible damage provoked by non-alcoholic steatohepatitis (NASH), fibrosis and cirrhosis. Therefore, the assessment of NAFLD is a paramount objective in toxicological screenings of new drug candidates. In this study, a metabolomic fingerprint of NAFLD induced in HepaRG® cells at four dosing schemes by a reference toxicant, sodium valproate (NaVPA), was obtained using liquid-liquid extraction followed by liquid chromatography and accurate mass-mass spectrometry (LC-AM/MS)...
January 17, 2018: Toxicology Letters
Lakkakula Satish, Arockiam Sagina Rency, Manikandan Ramesh
Severe drought stress (water deficit) in finger millet (Eleusine coracana L. Gaertn.) plants significantly reduced total leaf chlorophyll and relative water content in shoots and roots, whereas electrolyte leakage, concentrations of proline and hydrogen peroxide, as well as caspase-like activity were significantly increased. The role of spermidine in plant defence to water-stress was investigated after subjected to various drought treatments. Three weeks of daily spermidine sprays (0.2 mM) at early flowering stage significantly changed shoot and root growth, in both fresh and dry weights terms...
January 2018: 3 Biotech
Kavita Raniga, Chen Liang
Viruses exploit the host and induce drastic metabolic changes to ensure an optimal environment for replication and the production of viral progenies. In response, the host has developed diverse countermeasures to sense and limit these alterations to combat viral infection. One such host mechanism is through interferon signaling. Interferons are cytokines that enhances the transcription of hundreds of interferon-stimulated genes (ISGs) whose products are key players in the innate immune response to viral infection...
January 13, 2018: Viruses
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