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aminoguanidine

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https://www.readbyqxmd.com/read/29666541/antiglycation-and-antioxidant-activities-of-mogroside-extract-from-siraitia-grosvenorii-swingle-fruits
#1
Hesheng Liu, Chengcheng Wang, Xiangyang Qi, Jian Zou, Zhida Sun
Siraitia grosvenorii (Swingle) is one kind of medical and edible plants with various health-promoting properties. Recently, its hypoglycemic and antidiabetic activities have been reported, but the underlying mechanism remains to be explored. The current study was aimed to investigate the antioxidant and antiglycation activities of mogroside extract (MGE) from Siraitia grosvenorii (Swingle). The results showed that compared to glycated BSA, MGE at middle (125 μg/mL) and high dose (500 μg/mL) significantly inhibited BSA glycation evidenced by decreased fluorescent AGEs formation, protein carbonyls and Nε -(carboxymethyl) lysine (CML) level at 500 μg/mL by 58...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29624023/effect-of-nitric-oxide-on-boar-sperm-motility-membrane-integrity-and-acrosomal-status-during-semen-storage
#2
M Jovicić, E Pintus, T Fenclova, O Simonik, E Chmelikova, J L Ros-Santaella, M Sedmikova
Nitric oxide (NO) is a major gasotransmitter involved in several physiological processes of male reproduction. There is, nevertheless, little information concerning the role of NO during semen storage. The aim of this study was to evaluate the effect of NO on boar semen stored at 17oC for 72 h. For this purporse, sperm samples were treated with 0.625, 1.25, 2.5, 5, and 10 mM aminoguanidine (AG) or Nω-Nitro-L-arginine methyl ester hydrochloride (L-NAME), a selective and non-selective NO synthase (NOS) inhibitor, respectively...
March 2018: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/29618423/pharmacological-activities-of-justicia-adhatoda
#3
Ibrar Khan, Bashir Ahmad, Sadiq Azam, Fida Hassan, - Nazish, Aamir Aziz, Noor Rehman, Farman Ullah, Zainab Liaqat
The current study focused on the pharmacological activities of Justicia adhatoda; including antibacterial, antifungal, phytotoxic, cytotoxic, haemagglutination, insecticidal, in vitro antiglycation, DPPH antioxidant and anti-termite. The crude methanolic extract (Crd. Met. Ext) showed 46.4 % antibacterial activity against M. morganii while the n-hexane fraction showed good (71.4%) and moderate (55.1%) activity against M. morganii and A. baumannii respectively. The EtOAc and aqueous fractions, in most of the cases, showed low to no activity against the selected bacterial pathogens, against A...
March 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29573854/nitric-oxide-involvement-in-additive-antidepressant-like-effect-of-agmatine-and-lithium-in-mice-forced-swim-test
#4
Sattar Ostadhadi, Abbas Norouzi-Javidan, Vahid Nikoui, Samira Zolfaghari, Abouzar Moradi, Ahmad Reza Dehpour
Lithium is still the main agent in the management of mood disorders such as depression. Likewise, agmatine protects the central nervous system (CNS) against depression. The aim of the present study was to examine the possible additive antidepressant-like effect of agmatine and lithium in mice forced swim test (FST) as well as exploration of the probable involvement of nitric oxide (NO) pathway in this response. Results showed that pretreatment with a subeffective dose of agmatine (0.01 mg/kg) augmented the antidepressant-like effect of lithium subeffective dose (3 mg/kg) (P < 0...
March 15, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29558629/anticonvulsant-effect-of-minocycline-on-pentylenetetrazole-induced-seizure-in-mice-involvement-of-nitric-oxide-and-n-methyl-d-aspartate-receptor
#5
Hossein Amini-Khoei, Nastaran Kordjazy, Arya Haj-Mirzaian, Shayan Amiri, Arvin Haj-Mirzaian, Armin Shirzadian, Amin Hasanvand, Shima Balali-Dehkordi, Mahsa Hassanipoor, Ahmad Reza Dehpour
Anticonvulsant effects of minocycline have been explored recently. This study was designed to examine the anticonvulsant effect of acute administration of minocycline on pentylenetetrazole (PTZ)-induced seizures in mouse considering the possible role of nitric oxide (NO)/NMDA pathway. We induced seizure using intravenous administration of PTZ. Our results showed that acute administration of minocycline increased the seizure threshold. Furthermore, co-administration of sub-effective doses of the non-selective nitric oxide synthase (NOS) inhibitor, L-NAME (10 mg/kg) and the neuronal NOS inhibitor, 7-nitroindazole (40 mg/kg) enhanced the anticonvulsant effect of sub-effective dose of minocycline (40 mg/kg)...
March 20, 2018: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29542843/disruption-of-the-pacemaker-activity-of-interstitial-cells-of-cajal-via-nitric-oxide-contributes-to-postoperative-ileus
#6
N Kaji, S Nakayama, K Horiguchi, S Iino, H Ozaki, M Hori
BACKGROUND: Interstitial cells of Cajal (ICC) serve as intestinal pacemakers. Postoperative ileus (POI) is a gastrointestinal motility disorder that occurs following abdominal surgery, which is caused by inflammation-induced dysfunction of smooth muscles and enteric neurons. However, the participation of ICC in POI is not well understood. In this study, we investigated the functional changes of ICC in a mouse model of POI. METHODS: Intestinal manipulation (IM) was performed to induce POI...
March 15, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29511833/reactive-oxygen-species-and-nitric-oxide-are-involved-in-polyamine-induced-growth-inhibition-in-wheat-plants
#7
Laura Recalde, Analía Vázquez, María D Groppa, María Patricia Benavides
Polyamines (PAs) produce H2 O2 and nitric oxide (NO) during their normal catabolism and modulate plant growth and development. To explore the biochemical basis of PAs-induced growth inhibition in Triticum aestivum L seedlings, we examined the role of O2 ·- , H2 O2 or NO in shoot and root development. Although all PA treatments resulted in a variable reduction of root and shoot elongation, spermine (Spm) caused the greater inhibition in a similar way to that observed with the NO donor, sodium nitroprusside (SNP)...
March 6, 2018: Protoplasma
https://www.readbyqxmd.com/read/29501650/the-production-of-nitric-oxide-in-the-coeliac-ganglion-modulates-the-effect-of-cholinergic-neurotransmission-on-the-rat-ovary-during-the-preovulatory-period
#8
María B Delsouc, María C Della Vedova, Darío Ramírez, Silvia M Delgado, Marilina Casais
The aim of the present work was to investigate whether the nitric oxide produced by the nitric oxide/nitric oxide synthase (NO/NOS) system present in the coeliac ganglion modulates the effects of cholinergic innervation on oxidative status, steroidogenesis and apoptotic mechanisms that take place in the rat ovary during the first proestrous. An ex vivo Coeliac Ganglion- Superior Ovarian Nerve- Ovary (CG-SON-O) system was used. Cholinergic stimulation of the CG was achieved by 10-6  M Acetylcholine (Ach). Furthermore, 400 μM Aminoguanidine (AG) - an inhibitor of inducible-NOS was added in the CG compartment in absence and presence of Ach...
February 28, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29499192/evidence-for-the-involvement-of-tnf-%C3%AE-il-1%C3%AE-and-il-10-in-the-antinociceptive-and-anti-inflammatory-effects-of-indole-3-guanylhydrazone-hydrochloride-an-aromatic-aminoguanidine-in-rodents
#9
Silvia M S Sandes, Luana Heimfarth, Renan G Brito, Priscila L Santos, Daniele N Gouveia, Alexandra M S Carvalho, Jullyana S S Quintans, Edeildo F da Silva-Júnior, Thiago M de Aquino, Paulo H B França, João X de Araújo-Júnior, Ricardo L C Albuquerque-Júnior, Gokhan Zengin, Martine Schmitt, Jean-Jacques Bourguignon, Lucindo J Quintans-Júnior
BACKGROUND: Indole-3-guanylhydrazone hydrochloride (LQM01) is a new derivative of aminoguanidine hydrochloride, an aromatic aminoguanidine. METHODS: Mice were treated with LQM01 (5, 10, 25 or 50 mg/kg, i.p.), vehicle (0.9% saline i.p.) or a standard drug. The mice were subjected to carrageenan-induced pleurisy, abdominal writhing induced by acetic acid, the formalin test and the hot-plate test. The model of non-inflammatory chronic muscle pain induced by saline acid was also used...
April 25, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29453978/venlafaxine-prevents-morphine-antinociceptive-tolerance-the-role-of-neuroinflammation-and-the-l-arginine-nitric-oxide-pathway
#10
Mohammad Taghi Mansouri, Bahareh Naghizadeh, Behnam Ghorbanzadeh, Soheila Alboghobeish, Neda Amirgholami, Gholamreza Houshmand, Omar Cauli
Opioid-induced neuroinflammation and the nitric oxide (NO) signal-transduction pathway are involved in the development of opioid analgesic tolerance. The antidepressant venlafaxine (VLF) modulates NO in nervous tissues, and so we investigated its effect on induced tolerance to morphine, neuroinflammation, and oxidative stress in mice. Tolerance to the analgesic effects of morphine were induced by injecting mice with morphine (50 mg/kg) once a day for three consecutive days; the effect of co-administration of VLF (5 or 40 mg/kg) with morphine was similarly tested in a separate group...
May 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29437543/acute-copper-overload-induces-vascular-dysfunction-in-aortic-rings-due-to-endothelial-oxidative-stress-and-increased-nitric-oxide-production
#11
Karolini Zuqui Nunes, Mirian Fioresi, Vinicius Bermond Marques, Dalton Valentim Vassallo
The mechanisms involved in vascular reactivity alterations promoted by copper (Cu) overload were investigated. Thoracic aorta obtained from male Wistar rats were cut into rings and exposed for 1 h to 10 µg/ml Cu. Exposure to Cu decreased the contractile responses of aortic rings to phenylephrine (PHE). Removal of endothelium and subsequent administration of N-nitro-L arginine methyl ester (L-NAME), tetrahydrobiopterin, aminoguanidine, diethyldithiocarbamic acid, catalase, or tetraethylammonium increased contractile responses...
February 13, 2018: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/29421244/involvement-of-no-nmda-r-pathway-in-the-behavioral-despair-induced-by-amphetamine-withdrawal
#12
Arvin Haj-Mirzaian, Shayan Amiri, Hossein Amini-Khoei, Arya Haj-Mirzaian, Arsalan Hashemiaghdam, Kiana Ramezanzadeh, Maria Ghesmati, Khashayar Afshari, Ahmad Reza Dehpour
Abrupt discontinuation of chronic amphetamine consumption leads to withdrawal symptoms including depression, anhedonia, dysphoria, fatigue, and anxiety. These irritating symptoms may result in continuing to take the drug or can lead to suicidal behavior. Past studies have shown the involvement of various biologic systems in depression induced following amphetamine withdrawal (AW). However, there is no evidence about the relation between nitric oxide (NO) with NMDA receptors on depression following AW. In this study, we examined the involvement of the NO/NMDA pathways on depressive-like behaviors after 24 h withdrawal following 5 continuous days of amphetamine administration in male NMRI mice...
February 5, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29408007/neuropharmacological-characterization-of-frutalin-in-mice-evidence-of-an-antidepressant-like-effect-mediated-by-the-nmda-receptor-no-cgmp-pathway
#13
João Ronielly Campêlo Araújo, José de Maria Albuquerque de Melo Júnior, Marina de Barros Mamede Vidal Damasceno, Sacha Aubrey Alves Rodrigues Santos, Antônio Eufrásio Vieira-Neto, Marina Duarte Pinto Lobo, Adriana Rolim Campos, Renato de Azevedo Moreira, Ana Cristina de Oliveira Monteiro-Moreira
In this study we evaluated the effect of frutalin (FTL) on mouse behavior. Mice (n = 6/group) were treated (i.p.) with FTL (0.25; 0.5 or 1 mg/kg) or vehicle and submitted to several tests (hole-board/HBT, elevated plus maze/PMT, open field/OFT, tail suspension/TST, or forced swimming/FST). Yohimbine, ketamine, l-NAME, aminoguanidine, 7-NI, methylene blue, l-arginine or dl-serine was administered 30 min before FTL (0.5 mg/kg). To evaluate the subchronic effect, animals were injected with FTL or vehicle for 7 days and submitted to the FST...
January 30, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29400329/formaldehyde-aminoguanidine-condensation-and-aminoguanidine-self-condensation-products-syntheses-crystal-structures-and-characterization
#14
Elena A Buvaylo, Vladimir N Kokozay, Nataliia Yu Strutynska, Olga Yu Vassilyeva, Brian W Skelton
Guanidine is the functional group on the side chain of arginine, one of the fundamental building blocks of life. In recent years, a number of compounds based on the aminoguanidine (AG) moiety have been described as presenting high anticancer activities. The product of condensation between two molecules of AG and one molecule of formaldehyde was isolated in the protonated form as the dinitrate salt (systematic name: 2,8-diamino-1,3,4,6,7,9-hexaazanona-1,8-diene-1,9-diium dinitrate), C3H14N82+·2NO3-, (I). The cation lacks crystallographically imposed symmetry and comprises two terminal planar guanidinium groups, which share an N-C-N unit...
February 1, 2018: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/29363586/guanabenz-inhibits-tlr9-signaling-through-a-pathway-that-is-independent-of-eif2%C3%AE-dephosphorylation-by-the-gadd34-pp1c-complex
#15
Jessica Perego, Andreia Mendes, Clarisse Bourbon, Voahirana Camosseto, Alexis Combes, Hong Liu, Thien-Phong Vu Manh, Alexandre Dalet, Lionel Chasson, Lionel Spinelli, Nathalie Bardin, Laurent Chiche, Manuel A S Santos, Evelina Gatti, Philippe Pierre
Endoplasmic reticulum (ER) stress triggers or amplifies inflammatory signals and cytokine production in immune cells. Upon the resolution of ER stress, the inducible phosphatase 1 cofactor GADD34 promotes the dephosphorylation of the initiation factor eIF2α, thereby enabling protein translation to resume. Several aminoguanidine compounds, such as guanabenz, perturb the eIF2α phosphorylation-dephosphorylation cycle and protect different cell or tissue types from protein misfolding and degeneration. We investigated how pharmacological interference with the eIF2α pathway could be beneficial to treat autoinflammatory diseases dependent on proinflammatory cytokines and type I interferons (IFNs), the production of which is regulated by GADD34 in dendritic cells (DCs)...
January 23, 2018: Science Signaling
https://www.readbyqxmd.com/read/29363521/the-effect-of-aminoguanidine-ag-and-pyridoxamine-pm-on-ageing-human-cortical-bone
#16
O Abar, S Dharmar, S Y Tang
OBJECTIVES: Advanced glycation end-products (AGEs) are a post-translational modification of collagen that form spontaneously in the skeletal matrix due to the presence of reducing sugars, such as glucose. The accumulation of AGEs leads to collagen cross-linking, which adversely affects bone quality and has been shown to play a major role in fracture risk. Thus, intervening in the formation and accumulation of AGEs may be a viable means of protecting bone quality. METHODS: An in vitro model was used to examine the efficacy of two AGE-inhibitors, aminoguanidine (AG) and pyridoxamine (PM), on ageing human cortical bone...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29353375/comparative-effects-of-hydrogen-sulfide-releasing-compounds-on-3-h-d-aspartate-release-from-bovine-isolated-retinae
#17
Pratik Bankhele, Ankita Salvi, Jamal Jamil, Fatou Njie-Mbye, Sunny Ohia, Catherine A Opere
We investigated the pharmacological actions of a slow-releasing H2 S donor, GYY 4137; a substrate for the biosynthesis of H2 S, L-cysteine and its precursor, N-acetylcysteine on potassium (K+ ; 50 mM)-evoked [3 H]D-aspartate release from bovine isolated retinae using the Superfusion Method. GYY 4137 (10 nM-10 µM), L-cysteine (100 nM-10 µM) and N-acetylcysteine (10 µM-1 mM) elicited a concentration-dependent decrease in K+ -evoked [3 H]D-aspartate release from isolated bovine retinae without affecting basal tritium efflux...
March 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29323171/new-anti-inflammatory-guaianes-from-the-atlantic-hydrotherm-derived-fungus-graphostroma-sp-mccc-3a00421
#18
Siwen Niu, Chun-Lan Xie, Jin-Mei Xia, Zhu-Hua Luo, Zongze Shao, Xian-Wen Yang
Nine new guaianes (graphostromanes A-I, 1-9) were isolated from the deep-sea-derived fungus Graphostroma sp. MCCC 3A00421, along with four known ones (10-13). The relative configurations were established mainly by detailed analysis of the NMR and HRESIMS data, while the absolute configurations were assigned using the X-ray crystallography and modified Mosher's method. All isolates were evaluated for their inhibitory effects against lipopolysaccharide (LPS)-induced nitric oxide (NO) production in RAW264.7 macrophages...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29259041/paeonol-attenuates-lps-induced-endothelial-dysfunction-and-apoptosis-by-inhibiting-bmp4-and-tlr4-signaling-simultaneously-but-independently
#19
Ker Woon Choy, Yeh Siang Lau, Dharmani Murugan, Paul M Vanhoutte, Mohd Rais Mustafa
Inflammatory injury of the endothelium leads to apoptosis and endothelial dysfunction. The current study explored the effect and mechanisms of paeonol in inflammation-induced apoptosis and endothelial dysfunction induced by lipopolysaccharides (LPSs). The effects of paeonol on LPS-induced inflammatory injury were assessed by Western blotting, flow cytometry and reactive oxygen species (ROS) measurement in human umbilical vein endothelial cells (HUVECs) and C57BL/6J mice. Vascular reactivity of isolated mouse aortae was examined using wire myographs...
March 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29229986/high-fat-diet-induced-obesity-impairs-insulin-signaling-in-lungs-of-allergen-challenged-mice-improvement-by-resveratrol
#20
Diana M André, Marina C Calixto, Carolina Sollon, Eduardo C Alexandre, Edith B G Tavares, Ana C A Naime, Gabriel F Anhê, Edson Antunes
Insulin resistance plays an important role in obesity-associated asthma exacerbations. Using a murine model of allergic airway inflammation, we evaluated the insulin signaling transmission in lungs of obese compared with lean mice. We further evaluated the effects of the polyphenol resveratrol in the pulmonary insulin signaling. In lean mice, insulin stimulation significantly increased phosphorylations of AKT, insulin receptor substrate 1 (IRS-1) and insulin receptor β (IRβ) in lung tissue and isolated bronchi (p < 0...
December 11, 2017: Scientific Reports
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