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https://www.readbyqxmd.com/read/28889190/anti-apoptotic-role-of-spermine-against-lead-and-or-gamma-irradiation-induced-hepatotoxicity-in-male-rats
#1
Rasha Abu-Khudir, Mahmoud E Habieb, Marwa A Mohamed, Asrar M Hawas, Tarek M Mohamed
Exposure to either lead (Pb) or γ-irradiation (IR) results in oxidative stress in biological systems. Herein, we explored the potential anti-apoptotic effect of spermine (Spm) against lead and/or γ-irradiation-induced hepatotoxicity in male albino rats. Rats were divided into eight experimental groups of ten rats each: groups including negative control, whole body γ-irradiated (6 Gray (Gy)), lead acetate (PbAct) trihydrate orally administered (75 mg/kg bw ≡ 40 mg/kg bw Pb for 14 consecutive days), and Spm intraperitoneally dosed (10 mg/kg bw for 14 consecutive days) rats and groups subjected to combinations of Pb + IR, Spm + IR, Spm + Pb, and Spm + Pb followed by IR on day 14 (Spm + Pb + IR)...
September 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28886510/polyamine-based-analogs-and-conjugates-as-antikinetoplastid-agents
#2
REVIEW
Elodie Jagu, Sébastien Pomel, Stéphanie Pethe, Philippe M Loiseau, Raphaël Labruère
Naturally occurring polyamines: putrescine, spermidine and spermine are crucial for Kinetoplastid growth and persistence. These aliphatic polycations are either biosynthesized or internalized into Kinetoplastid by active transport. Impairing the polyamine metabolism using polyamine derivatives is an interesting path in the search of new antikinetoplastid chemotherapy. In the past 30 years, research interest in this field has been constantly expanding and recent results demonstrated that the discovery of a polyamine-based antikinetoplastid drug is undoubtedly possible...
August 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28886181/activation-of-endoplasmic-reticulum-stress-response-by-enhanced-polyamine-catabolism-is-important-in-the-mediation-of-cisplatin-induced-acute-kidney-injury
#3
Kamyar Zahedi, Sharon Barone, Christina Destefano-Shields, Marybeth Brooks, Tracy Murray-Stewart, Matthew Dunworth, Weimin Li, Joanne R Doherty, Mark A Hall, Roger D Smith, John L Cleveland, Robert A Casero, Manoocher Soleimani
Cisplatin-induced nephrotoxicity limits its use in many cancer patients. The expression of enzymes involved in polyamine catabolism, spermidine/spermine N1-acetyltransferase (SSAT) and spermine oxidase (SMOX) increase in the kidneys of mice treated with cisplatin. We hypothesized that enhanced polyamine catabolism contributes to tissue damage in cisplatin acute kidney injury (AKI). Using gene knockout and chemical inhibitors, the role of polyamine catabolism in cisplatin AKI was examined. Deficiency of SSAT, SMOX or neutralization of the toxic products of polyamine degradation, H2O2 and aminopropanal, significantly diminished the severity of cisplatin AKI...
2017: PloS One
https://www.readbyqxmd.com/read/28881427/active-site-geometry-of-a-novel-aminopropyltransferase-for-biosynthesis-of-hyperthermophile-specific-branched-chain-polyamine
#4
Ryota Hidese, Ka Man Tse, Seigo Kimura, Eiichi Mizohata, Junso Fujita, Yuhei Horai, Naoki Umezawa, Tsunehiko Higuchi, Masaru Niitsu, Tairo Oshima, Tadayuki Imanaka, Tsuyoshi Inoue, Shinsuke Fujiwara
Branched-chain polyamines are found exclusively in thermophilic bacteria and Euryarchaeota and play essential roles in survival at high temperatures. In the present study, kinetic analyses of a branched-chain polyamine synthase from the hyperthermophilic archaeon Thermococcus kodakarensis (Tk-BpsA) were conducted, showing that N(4) -bis(aminopropyl)spermidine was produced by sequential additions of decarboxylated S-adenosyladenosine (dcSAM) aminopropyl groups to spermidine, through bifunctional catalytic action...
September 7, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28873527/enzymes-loaded-chitosan-coconut-fibre-zinc-oxide-nanoparticles-strip-for-polyamine-determination
#5
Vinita Hooda, Archita
Most often, the immobilized enzyme based quantification is an attractive alternative to other chromatographic, electrochemical and mass spectrometry based methods due to its specificity and simplicity. In the present study, polyamine oxidase specific for spermine and spermidine and diamine oxidase specific for putrescine, were co-immobilized onto a novel chitosan/coconut fibre/zinc oxide nanoparticles (CS/CF/nZnO) hybrid support to yield a polyamine sensing strip. The strip worked optimally at pH 7.0, temperature 25°C and 6min of incubation time...
January 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28869871/biochemical-characterization-and-homology-modeling-of-polyamine-oxidase-from-cyanobacterium-synechocystis-sp-pcc-6803
#6
Khanittha Samasil, Leonor Lopes de Carvalho, Pirkko Mäenpää, Tiina A Salminen, Aran Incharoensakdi
The intracellular polyamine contents are regulated not only by polyamine biosynthesis and transport but also by polyamine degradation catalyzed by copper-dependent amine oxidase (DAO) and FAD-dependent polyamine oxidase (PAO). The genome sequence of Synechocystis sp. PCC 6803 reveals the presence of at least one putative polyamine oxidase gene, slr5093. The open reading frame of slr5093 encoding Synechocystis polyamine oxidase (SynPAO, E.C. 1.5.3.17) was expressed in Escherichia coli. The purified recombinant enzyme had the characteristic absorption spectrum of a flavoprotein with absorbance peaks at 380 and 450 nm...
August 26, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28867747/involvement-of-carrier-mediated-transport-at-the-blood-cerebrospinal-fluid-barrier-in-spermine-clearance-from-rat-brain
#7
Shin-Ichi Akanuma, Hirokazu Shimada, Yoshiyuki Kubo, Ken-Ichi Hosoya
Spermine is the end-product in the polyamine biosynthetic pathway, and its excess accumulation induces neuroexcitatory responses and neurotoxicity. The purpose of this study was to elucidate the involvement of transport systems at the brain barriers in the clearance of spermine. In vivo rat spermine elimination from brain parenchyma across the blood-brain barrier (BBB) and blood-cerebrospinal fluid (CSF) barrier (BCSFB) was assessed by intracerebral and intracerebroventricular administration techniques, respectively...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28852211/mapping-architectural-and-transcriptional-alterations-in-non-lesional-and-lesional-epidermis-in-vitiligo
#8
Archana Singh, Vishvabandhu Gotherwal, Päivi Junni, Vinaya Vijayan, Manisha Tiwari, Parul Ganju, Avinash Kumar, Pankaj Sharma, Tanveer Fatima, Aayush Gupta, Ananthaprasad Holla, Hemanta K Kar, Sangeeta Khanna, Lipi Thukral, Garima Malik, Krishnamurthy Natarajan, Chetan J Gadgil, Riitta Lahesmaa, Vivek T Natarajan, Rajni Rani, Rajesh S Gokhale
In vitiligo, chronic loss of melanocytes and consequent absence of melanin from the epidermis presents a challenge for long-term tissue maintenance. The stable vitiligo patches are known to attain an irreversible depigmented state. However, the molecular and cellular processes resulting in this remodeled tissue homeostasis is unclear. To investigate the complex interplay of inductive signals and cell intrinsic factors that support the new acquired state, we compared the matched lesional and non-lesional epidermis obtained from stable non-segmental vitiligo subjects...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28846729/histones-bundle-f-actin-filaments-and-affect-actin-structure
#9
Edna Blotnick, Asaf Sol, Andras Muhlrad
Histones are small polycationic proteins complexed with DNA located in the cell nucleus. Upon apoptosis they are secreted from the cells and react with extracellular polyanionic compounds. Actin which is a polyanionic protein, is also secreted from necrotic cells and interacts with histones. We showed that both histone mixture (histone type III) and the recombinant H2A histone bundles F-actin, increases the viscosity of the F-actin containing solution and polymerizes G-actin. The histone-actin bundles are relatively insensitive to increase of ionic strength, unlike other polycation, histatin, lysozyme, spermine and LL-37 induced F-actin bundles...
2017: PloS One
https://www.readbyqxmd.com/read/28838697/design-and-multi-step-synthesis-of-chalcone-polyamine-conjugates-as-potent-antiproliferative-agents
#10
Benjamin Rioux, Christelle Pouget, Chloë Fidanzi-Dugas, Aurélie Gamond, Aurélie Laurent, Josiane Semaan, Aline Pinon, Yves Champavier, David Y Léger, Bertrand Liagre, Jean-Luc Duroux, Catherine Fagnère, Vincent Sol
The aim of this study is to synthesize chalcone-polyamine conjugates in order to enhance bioavailability and selectivity of chalcone core towards cancer cells, using polyamine-based vectors. 3-hydroxy-3',4,4',5'-tetramethoxychalcone (1) and 3',4,4',5'-tetramethoxychalcone (2) were selected as parent chalcones since they were found to be efficient anti-proliferative agents on various cancer cells. A series of ten chalcone-polyamine conjugates was obtained by reacting carboxychalcones with different polyamine tails...
September 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28832523/a-biosensor-cmos-platform-and-integrated-readout-circuit-in-0-18-%C3%AE-m-cmos-technology-for-cancer-biomarker-detection
#11
Abdulaziz Alhoshany, Shilpa Sivashankar, Yousof Mashraei, Hesham Omran, Khaled N Salama
This paper presents a biosensor-CMOS platform for measuring the capacitive coupling of biorecognition elements. The biosensor is designed, fabricated, and tested for the detection and quantification of a protein that reveals the presence of early-stage cancer. For the first time, the spermidine/spermine N1 acetyltransferase (SSAT) enzyme has been screened and quantified on the surface of a capacitive sensor. The sensor surface is treated to immobilize antibodies, and the baseline capacitance of the biosensor is reduced by connecting an array of capacitors in series for fixed exposure area to the analyte...
August 23, 2017: Sensors
https://www.readbyqxmd.com/read/28828737/cationic-niosomes-for-enhanced-skin-immunization-of-plasmid-dna-encoding-ovalbumin-via-hollow-microneedles
#12
Boonnada Pamornpathomkul, Nattisa Niyomtham, Boon-Ek Yingyongnarongkul, Chutinun Prasitpuriprecha, Theerasak Rojanarata, Tanasait Ngawhirunpat, Praneet Opanasopit
The purpose of the present study was to evaluate the use of cationic niosomes composed of Span20:cholesterol:cationic lipid (N (1),N (1)-dimyristeroyloxyethyl-spermine) at the molar ratio of 2.5:2.5:0.5 mM combined with hollow microneedle (MN) devices for in vivo skin immunization of plasmid DNA-encoding ovalbumin (pOVA). The results revealed that using hollow MNs with cationic niosomes for pOVA penetration successfully induced both humoral and cell-mediated immune responses including immunoglobulin G (IgG) antibody responses, interleukin-4 (IL-4), and interferon gamma (IFN-γ) cytokine secretion...
August 21, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28827313/spermine-inhibits-vibrio-cholerae-biofilm-formation-through-the-nsps-mbaa-polyamine-signaling-system
#13
Richard C Sobe, Whitney G Bond, Caitlin K Wotanis, Josiah P Zayner, Marybeth A Burriss, Nicolas Fernandez, Eric L Bruger, Christopher M Waters, Howard S Neufeld, Ece Karatan
The aquatic bacterium and human intestinal pathogen, Vibrio cholerae, senses and responds to a variety of environment-specific cues to regulate biofilm formation. Specifically, the polyamines norspermidine and spermidine enhance and repress V. cholerae biofilm formation, respectively. These effects are relevant for understanding V. cholerae pathogenicity and are mediated through the periplasmic binding protein, NspS, and the transmembrane c-di-GMP phosphodiesterase MbaA. However, the levels of spermidine required to inhibit biofilm formation through this pathway are unlikely to be encountered by V...
August 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28826287/docetaxel-loaded-nanostructured-lipid-carriers-functionalized-with-trastuzumab-herceptin-for-her2-positive-breast-cancer-cells
#14
Jaleh Varshosaz, Mohammad Ali Davoudi, Sara Rasoul-Amini
The aim of the present study was to prepare Herceptin targeted nanostructured lipid carriers (NLCs) of docetaxel (DTX). Herceptin was conjugated by chemical and physical methods to NLCs prepared by solvent extraction technique followed by probe sonication. Different types of fatty amines were used in construction of NLCs. The NLCs were characterized for their antibody coupling efficiency, particle size, zeta potential, polydispersity index, drug entrapment efficiency and drug release profiles. The toxicity of NLCs on MDA-MB-468 (HER2 negative receptor) and BT-474 (HER2 positive) breast cancer cell lines was evaluated by MTT assay...
August 21, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28817100/modulatory-effects-of-exogenously-applied-polyamines-on-postharvest-physiology-antioxidant-system-and-shelf-life-of-fruits-a-review
#15
REVIEW
Sunil Sharma, Sunil Pareek, Narashans Alok Sagar, Daniel Valero, Maria Serrano
Polyamines (PAs) are natural compounds involved in many growth and developmental processes in plants, and, specifically in fruits, play a vital role regulating its development, ripening and senescence processes. Putrescine (PUT), spermine (SPE), and spermidine (SPD) are prominent PAs applied exogenously to extend shelf life of fruits. They also originate endogenously during developmental phases of horticultural crops and simultaneously affect the quality attributes and shelf life. Their anti-ethylene nature is being exploited to enhance the shelf life when exogenously applied on fruits...
August 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28815856/molecular-dynamics-insights-into-polyamine-dna-binding-modes-implications-for-cross-link-selectivity
#16
Emmanuelle Bignon, Chen-Hui Chan, Christophe Morell, Antonio Monari, Jean-Luc Ravanat, Elise Dumont
Biogenic polyamines, which play a role in DNA condensation and stabilization, are ubiquitous and are found at millimolar concentration in the nucleus of eukaryotic cells. The interaction modes of three polyamines-putrescine (Put), spermine (Spm), and spermidine (Spd)-with a self-complementary 16 base pair (bp) duplex, are investigated by all-atom explicit-solvent molecular dynamics. The length of the amine aliphatic chain leads to a change of the interaction mode from minor groove binding to major groove binding...
August 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28791397/trpc1-stimulates-calcium%C3%A2-sensing-receptor%C3%A2-induced-store%C3%A2-operated-ca2-entry-and-nitric-oxide-production-in-endothelial-cells
#17
Yuan-Yuan Qu, La-Mei Wang, Hua Zhong, Yong-Min Liu, Na Tang, Li-Ping Zhu, Fang He, Qing-Hua Hu
Store‑operated Ca2+ entry (SOCE) via store‑operated Ca2+ channels (SOCC), encoded by transient receptor potential canonical (TRPC) channel proteins, is an important underlying mechanism regulating intracellular Ca2+ concentration ([Ca2+]i) and various intracellular functions in endothelial cells (ECs). TRPC1, the probable candidate for SOCC, is expressed in ECs. Ca2+‑sensing receptor (CaSR) is functionally expressed in vascular endothelium and is important in Ca2+ mobilization and cardiovascular functions...
October 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28777009/importance-of-mitochondrial-calcium-uniporter-in-high-glucose-induced-endothelial-cell-dysfunction
#18
Wei Chen, Jie Yang, Shuhua Chen, Hong Xiang, Hengdao Liu, Dan Lin, Shaoli Zhao, Hui Peng, Pan Chen, Alex F Chen, Hongwei Lu
OBJECTIVE: Mitochondrial Ca(2+) overload is implicated in hyperglycaemia-induced endothelial cell dysfunction, but the key molecular events responsible remain unclear. We examined the involvement of mitochondrial calcium uniporter, which mediates mitochondrial Ca(2+) uptake, in endothelial cell dysfunction resulting from high-glucose treatment. METHODS: Human umbilical vein endothelial cells were exposed to various glucose concentrations and to high glucose (30 mM) following mitochondrial calcium uniporter inhibition or activation with ruthenium red and spermine, respectively...
August 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28776053/effect-of-spermine-derived-ages-on-oxidative-stress-and-polyamine-metabolism
#19
Ayumi Tsutsui, Ambara R Pradipta, Shinobu Kitazume, Naoyuki Taniguchi, Katsunori Tanaka
Non-enzymatic glycation between proteins and carbohydrates, such as advanced glycation end products (AGEs), are naturally occurring compounds implicated in aging and numerous degenerative diseases. Methyl glyoxal (MG), which is an intermediate of the AGE biosynthetic pathway, is known to react with primary amines of proteins to create a wide range of AGE modifications, such as carboxyethyl lysine (CEL) and methylglyoxal-derived lysine dimer (MOLD). As a means to investigate and probe the ROS production pathways of AGEs, low molecular weight compounds carboxyethyl spermine (CES) and methylglyoxal-derived spermine dimer (MOSD) were synthesized, which replace lysine with another highly nucleophilic biological amine, spermine (SPM)...
August 16, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28765886/exogenous-spermine-preserves-mitochondrial-bioenergetics-via-regulating-src-kinase-signaling-in-the-spinal-cord
#20
Rui Zhang, Xin-Nan Ma, Kai Liu, Lei Zhang, Meng Yao
Regulation of mitochondrial metabolism is becoming an important target in inhibiting necrosis and apoptosis following secondary spinal cord injury, and physiological compounds that reduce mitochondrial dysfunction are regarded as efficient protective reagents following injury. It has been demonstrated that spermine, a polyamine composed of four primary amines, may be taken up by a mitochondria‑specific uniporter and may preserve mitochondrial bioenergetics, suggesting that it may be important in the pathophysiology of mitochondria...
September 2017: Molecular Medicine Reports
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