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https://www.readbyqxmd.com/read/28641150/polyamine-and-tyramine-involvement-in-nacl-induced-improvement-of-cd-resistance-in-the-halophyte-inula-chrithmoides-l
#1
Rim Ghabriche, Tahar Ghnaya, Mejda Mnasri, Hanen Zaier, Raoudha Baioui, Delphine Vromman, Chedly Abdelly, Stanley Lutts
The aim of the present work was to analyze the impact of salinity on the plant response to Cd toxicity in the Mediterranean halophyte species Inula crithmoides. For this purpose, cuttings were cultivated hydroponically during 21d in the presence of 0, 25 or 50μM CdCl2 combined or not with 0, 100, 200 and 400mM NaCl. The obtained data demonstrated that, in the absence of Cd, NaCl strongly increased plant growth (the maximal dry weight being observed at 100mM) and enhanced the Na(+)/K(+) ratio in the shoot. Cd alone strongly affected plant growth in this halophyte...
June 6, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28633130/synthesis-screening-and-pro-apoptotic-activity-of-novel-acyl-spermidine-derivatives-on-human-cancer-cell-lines
#2
Syed Shoeb Razvi, Hany Choudhry, Said Salama Moselhy, Taha Abduallah Kumosani, Mohammed Nihal Hasan, Mazin A Zamzami, Khalid Omer Abualnaja, Abdulrahman Labeed Al-Malki, Mahmoud Alhosin, Tadao Asami
The polyamines putrescine, spermidine, and spermine are polycationic, alkyl polyamines which play a significant role in eukaryotic cell proliferation. The polyamine metabolism and function are dysregulated in tumor cells making them an attractive therapeutic target by employing polyamine analogs. These analogs have a high degree of similarity with the structure of polyamines but not with their function. Multidrug resistance is a major factor in the failure of many chemotherapeutic drugs which necessitates further research and exploration of better novel alternatives...
June 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28632118/tessaracoccus-arenae-sp-nov-isolated-from-sea-sand
#3
Chutimon Thongphrom, Jong-Hwa Kim, Nagamani Bora, Wonyong Kim
A Gram-stain positive, non-spore-forming, non-motile, facultatively anaerobic bacterial strain, designated CAU 1319T, was isolated from sea sand and the strain's taxonomic position was investigated using a polyphasic approach. Strain CAU 1319T grew optimally at 30 °C and at pH 7.5 in the presence of 2 % (w/v) NaCl. Phylogenetic analysis, based on the 16S rRNA gene sequence, revealed that strain CAU 1319T belongs to the genus Tessaracoccus, and is closely related to Tessaracoccus lapidicaptus IPBSL-7T (similarity 97...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28622455/intestinal-metabolites-are-profoundly-altered-in-the-context-of-hla-b27-expression-and-functionally-modulate-disease-in-a-rat-model-of-spondyloarthropathy
#4
Mark Asquith, Sean Davin, Patrick Stauffer, Claire Michell, Cathleen Janowitz, Phoebe Lin, Joe Ensign-Lewis, Jason M Kinchen, Dennis R Koop, Jim Rosenbaum
Objective HLA-B27 associated spondyloarthropathies are associated with an altered intestinal microbiota and bowel inflammation. Therefore, we sought to identify B27-dependent changes in both host and microbial metabolites in the HLA-B27/β2m rat and whether microbiota-derived metabolites could impact disease in this major model of spondyloarthropathy. Methods Cecal contents were collected from 6wk (pre-diseased) and 16wk (diseased) Fischer 344 HLA-B27/β2m transgenic rats and WT controls. Metabolomic profiling was performed by high-throughput gas- and liquid-chromatography-based mass spectrometry...
June 16, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28614056/spermine-and-spermidine-reversed-age-related-cardiac-deterioration-in-rats
#5
Hao Zhang, Junying Wang, Lingxu Li, Nannan Chai, Yuhan Chen, Feixiang Wu, Weihua Zhang, Lina Wang, Sa Shi, Li Zhang, Shuling Bian, Changqing Xu, Ye Tian, Yajun Zhao
Aging is the most important risk factor for cardiovascular disease (CVD). Slowing or reversing the physiological impact of heart aging may reduce morbidity and mortality associated with age-related CVD. The polyamines, spermine (SP) and spermidine (SPD) are essential for cell growth, differentiation and apoptosis, and levels of both decline with age. To explore the effects of these polyamines on heart aging, we administered SP or SPD intraperitoneally to 22- to 24-month-old rats for 6 weeks. Both treatments reversed and inhibited age-related myocardial morphology alterations, myocardial fibrosis, and cell apoptosis...
May 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28613148/sphingopyxis-solisilvae-sp-nov-isolated-from-forest-soil
#6
Dhiraj Kumar Chaudhary, Ram Hari Dahal, Jaisoo Kim
A yellow-coloured, Gram-staining-negative, motile and rod shaped bacterium, designated strain R366T, was isolated from forest soil of Kyonggi University, South Korea. It was able to grow at 15-42 °C, pH 6.0-10.0 and with 0-4 % (w/v) NaCl concentration. Based on the 16S rRNA gene sequence analysis, strain R366T belongs to the genus Sphingopyxis and is closely related to Sphingopyxis italica SC13E-S71T (98.72 % sequence similarity), Sphingopyxis chilensis S37T (98.51 %), Sphingopyxis fribergensis Kp5...
June 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28588603/short-term-effect-of-salt-shock-on-ethylene-and-polyamines-depends-on-plant-salt-sensitivity
#7
Pedro J Zapata, María Serrano, Manuel F García-Legaz, M T Pretel, M A Botella
In the present manuscript the short term effect (3-24 h) of a saline shock (NaCl 100 mM) on fresh weight, water content, respiration rate, ethylene production and Na(+), Cl(-), ACC and polyamine concentration was studied in four plant species with different salt sensitivity, pepper, lettuce, spinach, and beetroot. Higher reduction in fresh weight and water content as a consequence of saline shock was found in pepper and lettuce plants than in spinach and beetroot, the latter behaving as more salinity tolerant...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28587687/physiological-importance-of-polyamines
#8
Yasser Y Lenis, Mohammed A Elmetwally, Juan G Maldonado-Estrada, Fuller W Bazer
Polyamines are polycationic molecules that contain two or more amino groups (-NH3 +) and are present in all eukaryotic and prokaryotic cells. Polyamines are synthesized from arginine, ornithine, and proline, and from methionine as the methyl-group donor. In the traditional pathway for polyamine synthesis, arginase converts arginine into ornithine, which is decarboxylated by ornithine decarboxylase (ODC1) to generate putrescine. The latter is converted to spermidine and spermine. Recent studies have indicated the existence of 'non-classical pathways' for the generation of putrescine from arginine and proline in animal cells...
June 7, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28586222/structural-characterization-of-histatin-5-spermidine-conjugates-a-combined-experimental-and-theoretical-study
#9
Stephanie Jephthah, João Henriques, Carolina Cragnell, Sumant Puri, Mira Edgerton, Marie Skepö
Histatin 5 (Hst5) is a naturally occurring antimicrobial peptide that acts as the first line of defense against oral candidiasis. It has been shown that conjugation of the active Hst5 fragment, Hst54-15, and the polyamine spermidine (Spd) improves the candidacidal effect. Knowledge about the structure of these conjugates is, however, very limited. Thus, the aim of this study was to characterize the structural properties of the Hst54-15-Spd conjugates by performing atomistic molecular dynamics simulations in combination with small-angle X-ray scattering...
June 6, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28578006/increased-sat2-expression-is-associated-with-busulfan-induced-testicular-sertoli-cell-injury
#10
Yi Xian, Mingjun Wu, Yaping Liu, Jie Hao, Yu Wu, Xiaogang Liao, Gang Li
Busulfan is a chemotherapeutic agent used to treat chronic myelogenous leukemia and other myeloproliferative disorders. Increasing evidence has demonstrated that busulfan may induce testicular dysfunction by targeting genes that are expressed in the testis. Here, we showed that spermidine/spermine N1-acetyltransferase 2 (Sat2) was present in testicular Sertoli cells, and its expression was significantly increased by busulfan treatment. To investigate the implications of Sat2 upregulation for cell growth and function, a Sat2-overexpressing TM4 Sertoli cell model was established...
June 1, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28572828/apigenin-inhibits-human-sw620-cell-growth-by-targeting-polyamine-catabolism
#11
Jing Wang, TongMing Li, Linquan Zang, Xuediao Pan, Sujun Wang, Yanyan Wu, Guixiang Wang
Apigenin is a nonmutagenic flavonoid that has antitumor properties. Polyamines are ubiquitous cellular polycations, which play an important role in the proliferation and differentiation of cancer cells. Highly regulated pathways control the biosynthesis and degradation of polyamines. Ornithine decarboxylase (ODC) is the rate-limiting enzyme in the metabolism, and spermidine/spermine-N1-Acetyl transferase (SSAT) is the rate-limiting enzyme in the catabolism of polyamines. In the current study, the effect of increasing concentrations of apigenin on polyamine levels, ODC and SSAT protein expression, mRNA expression, cell proliferation and apoptosis, and the production of reactive oxygen species (ROS) was investigated in SW620 colon cancer cells...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28566446/cortisol-related-metabolic-alterations-assessed-by-mass-spectrometry-assay-in-patients-with-cushing-s-syndrome
#12
Guido Di Dalmazi, Marcus Quinkler, Timo Deutschbein, Cornelia Prehn, Nada Rayes, Matthias Kroiss, Christina Maria Berr, Günter K Stalla, Martin Fassnacht, Jerzy Adamski, Martin Reincke, Felix Beuschlein
OBJECTIVE: Endogenous hypercortisolism is a chronic condition associated with severe metabolic disturbances and cardiovascular sequela. The aim of this study was to characterize metabolic alterations in patients with different degrees of hypercortisolism by mass-spectrometry-based targeted plasma metabolomic profiling and correlate the metabolomic profile with clinical and hormonal data. DESIGN: Cross-sectional study. METHODS: Subjects (n=149) were classified according to clinical and hormonal characteristics: Cushing's syndrome (n=46), adrenocortical adenomas with autonomous cortisol secretion (n=31) or without hypercortisolism (n=27)...
May 31, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28559909/differential-responses-of-polyamines-and-antioxidants-to-drought-in-a-centipedegrass-mutant-in-comparison-to-its-wild-type-plants
#13
Mingxi Liu, Jingjing Chen, Zhenfei Guo, Shaoyun Lu
Centipedegrass (Eremochloa ophiuroides [Munro] Hack.) is an important warm-season turfgrass species with low turf maintenance requirements. However, our knowledge on physiological adaptation of centipedegrass to drought stress is limited. Physiological responses to drought in a gamma-ray-induced mutant 22-1 as compared with two wild type (WT) lines were analyzed for understanding of drought tolerance mechanism of centipedegrass. The mutant showed an elevated drought tolerance with higher levels of relative water content, net photosynthetic rate (A) and stomatal conductance (gs) and lower levels of ion leakage and malondialdehyde (MDA) under drought stress as compared with WT plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28546427/spermidine-promotes-bacillus-subtilis-biofilm-formation-by-activating-expression-of-the-matrix-regulator-slrr
#14
Laura Hobley, Bin Li, Jennifer L Wood, Sok-Ho Kim, Jacinth Naidoo, Ana Sofia Ferreira, Maxim Khomutov, Alexey Khomutov, Nicola R Stanley-Wall, Anthony J Michael
Ubiquitous polyamine spermidine is not required for normal planktonic growth of Bacillus subtilis but is essential for robust biofilm formation. However, the structural features of spermidine required for B. subtilis biofilm formation are unknown and so are the molecular mechanisms of spermidine-stimulated biofilm development. We report here that in a spermidine-deficient B. subtilis mutant, the structural analogue norspermidine, but not homospermidine, restored biofilm formation. Intracellular biosynthesis of another spermidine analogue, aminopropylcadaverine, from exogenously supplied homoagmatine also restored biofilm formation...
May 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28544195/long-and-branched-polyamines-are-required-for-maintenance-of-the-ribosome-trna-his-and-trna-tyr-in-thermus-thermophilus-cells-at-high-temperatures
#15
Misa Nakashima, Ryota Yamagami, Chie Tomikawa, Yuki Ochi, Toshiyuki Moriya, Haruichi Asahara, Dominique Fourmy, Satoko Yoshizawa, Tairo Oshima, Hiroyuki Hori
Thermus thermophilus is an extremely thermophilic eubacterium that produces various polyamines. Aminopropylagmatine ureohydrolase (SpeB) and SAM decarboxylase-like protein 1 (SpeD1) are involved in the biosynthesis of spermidine from arginine. Because long and branched polyamines in T. thermophilus are synthesized from spermidine, the speB and speD1 gene-deleted strains (ΔspeB and ΔspeD1, respectively) cannot synthesize long and branched polyamines. Although neither strain grew at high temperatures (>75°C) in minimal medium, both strains survived at 80°C when they were cultured at 70°C until the mid-log phase and then shifted to 80°C...
May 24, 2017: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/28530604/biogenic-amine-concentrations-and-evolution-in-chilled-canadian-pork-for-the-japanese-market
#16
Tania M Ngapo, Lise Vachon
The aim of this study was to evaluate concentrations and evolution of biogenic amines in Canadian pork destined for the Japanese market. At 48h post-mortem, export quality loins were aged at -1.7°C for 13, 28, 43 or 58d (chilled) or 4.0°C for 5d (fresh). Increasing concentrations of putrescine, spermine and spermidine were observed with chilled ageing period and were greater in chilled export (43d at -1.7°C) than domestic market (5d at 4.0°C) pork equivalents. Cadaverine was detected, but was not influenced by ageing conditions, and tyramine was only detected in some samples after 43days at -1...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28526281/effects-of-maternal-immune-activation-on-brain-arginine-metabolism-of-postnatal-day-2-rat-offspring
#17
Jiaxian Zhang, Yu Jing, Hu Zhang, David K Bilkey, Ping Liu
l-Arginine is a versatile semi-essential amino acid with a number of bioactive metabolites, and altered arginine metabolism has been implicated in the pathogenesis of schizophrenia. Earlier research has demonstrated that maternal immune activation (MIA; a risk factor for schizophrenia) alters arginine metabolism in the prefrontal cortex and hippocampus of the adult offspring. The present study investigated how MIA affected the levels of l-arginine and its downstream metabolites in the whole forebrain, frontal cortex, hippocampus and cerebellum of male and female rat offspring at the age of postnatal day 2...
May 16, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28523294/autophagy-in-aging-and-disease
#18
Mădălina Fîlfan, Raluca Elena Sandu, Alexandra Daniela Zăvăleanu, Andrei GreşiŢă, Daniela Gabriela Glăvan, Denissa Greta Olaru, Aurel Popa-Wagner
Autophagy is a catabolic degradation system used to destroy and recycle the unnecessary or damaged components of a cell. Autophagy is present at a basal level in all mammals and is regulated by some conditions, such as oxidative stress, starvation or hypoxia. In aged tissues, increased but also decreased expression of autophagy-specific proteins, Beclin 1, LC3, Atg5 and Atg7 has been reported. Likewise, it could be shown that the lifespan of yeast, nematodes and flies is prolonged by pharmacologically stimulated autophagy using exogenous administered spermidine...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28516954/histone-deacetylase-10-structure-and-molecular-function-as-a-polyamine-deacetylase
#19
Yang Hai, Stephen A Shinsky, Nicholas J Porter, David W Christianson
Cationic polyamines such as spermidine and spermine are critical in all forms of life, as they regulate the function of biological macromolecules. Intracellular polyamine metabolism is regulated by reversible acetylation and dysregulated polyamine metabolism is associated with neoplastic diseases such as colon cancer, prostate cancer and neuroblastoma. Here we report that histone deacetylase 10 (HDAC10) is a robust polyamine deacetylase, using recombinant enzymes from Homo sapiens (human) and Danio rerio (zebrafish)...
May 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28514972/the-effect-of-tetraneura-ulmi-l-galling-process-on-the-activity-of-amino-acid-decarboxylases-and-the-content-of-biogenic-amines-in-siberian-elm-tissues
#20
K Kmieć, C Sempruch, G Chrzanowski, P Czerniewicz
Tetraneura ulmi (L.), a member of Eriosomatinae subfamily, is one of the gall-forming aphids occurring on elms. Sap-sucking behaviour of founding mothers results in the formation of new plant organs. This study documents the changes in the content of plant biogenic amines (putrescine, cadaverine, spermidine, tryptamine, spermine and histamine) and key enzymes of their biosynthesis: lysine decarboxylase (LDC), tyrosine decarboxylase and ornithine decarboxylase (ODC) in galls and other parts of Siberian elm (Ulmus pumila L...
May 18, 2017: Bulletin of Entomological Research
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