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aminoguanidine

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https://www.readbyqxmd.com/read/28077315/inhibition-of-inos-alleviates-cognitive-deficits-and-depression-in-diabetic-mice-through-downregulating-the-no-sgc-cgmp-pkg-signal-pathway
#1
Xiao Yan Zhou, Fang Zhang, Chang Jiang Ying, Jing Chen, Ling Chen, Jing Dong, Yue Shi, Mang Tang, Xiao Tong Hu, Zhi Hua Pan, Na Na Xu, Kui Yang Zheng, Ren Xian Tang, Yuan Jian Song
Diabetes mellitus often results in a number of complications involving impaired brain function, including cognitive deficits and depression. However, the potential mechanisms for diabetes-related cognitive deficits and depression are not fully understood. Neurons in the hippocampal, cortical and amygdala functional regions are more susceptible to damage during hyperglycemia. Neuroprotection in the brain can rescue cognitive deficits and depression induced by hyperglycemia. This study investigated the potential mechanisms underlying diabetes-related congnitive deficits and depression, determined whether the inflammatory factor inducible nitric oxide synthase (iNOS) and the nitric oxide (NO)/soluble guanylyl cyclases (sGC)/cyclic guanosine monophosphate (cGMP)/protein kinase G (PKG) pathway, play key roles in cognitive deficits and depression associated...
January 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28065581/nitric-oxide-synthase-inhibitor-aminoguanidine-reduces-intracerebroventricular-colchicine-induced-neurodegeneration-memory-impairments-and-changes-of-systemic-immune-responses-in-rats
#2
Susmita Sil, Tusharkanti Ghosh, Rupsa Ghosh, Pritha Gupta
Intracerebroventricular (i.c.v.) injection of colchicine induces neurodegeneration, memory impairments and changes of some systemic immune responses in rats. Though the role of cox 2 in these colchicine induced changes have been evaluated, the influence of nitric oxide synthase (NOS) remains to be studied. The present study was designed to assess the role of NOS on the i.c.v. colchicine induced neurodegeneration, memory impairments and changes of some systemic immune responses by inhibiting its activity with aminoguanidine...
December 13, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28055264/inos-inhibition-improves-autonomic-dysfunction-and-oxidative-status-in-hypertensive-obese-rats
#3
Natalia Veronez da Cunha, Fernanda Novi Cortegoso Lopes, Carolina Panis, Rubens Cecchini, Phileno Pinge-Filho, Marli Cardoso Martins-Pinge
It has been suggested that nitric oxide (NO) from iNOS source is involved in inflammation and oxidative stress, and hypertension in obese subjects involves an inflammatory process. However, no study evaluated the participation of iNOS inhibition on cardiovascular, autonomic, and inflammatory parameters in obese rats. Obesity was induced by the administration of 4 mg/g body weight of monosodium glutamate (MSG) or equimolar saline (CTR) in newborn rats. On the 60th day, treatment with aminoguanidine (Amino, 50 mg/kg), an iNOS inhibitor, or 0...
January 5, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28025796/ifn-%C3%AE-regulates-xanthine-oxidase-mediated-inos-independent-oxidative-stress-in-maneb-and-paraquat-treated-rat-polymorphonuclear-leukocytes
#4
Deepali Singh, Vinod Kumar, Chetna Singh
Maneb (MB) and paraquat (PQ) provoke oxidative stress-mediated cell damage. Role of xanthine oxidase (XO) in oxidative stress and its association with nitric oxide (NO)/NO synthase (NOS) have been widely reported. While inducible NOS (iNOS) is implicated in MB+PQ-induced toxicity in rat polymorphonuclear leukocytes (PMNs), role of XO and its alliance with iNOS have not yet been established. The study investigated the role of XO in MB+PQ-induced oxidative stress in rat PMNs and its regulation by iNOS and inflammatory cytokines...
December 26, 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28012919/ilex-paraguariensis-and-its-main-component-chlorogenic-acid-inhibit-fructose-formation-of-advanced-glycation-endproducts-with-amino-acids-at-conditions-compatible-with-those-in-the-digestive-system
#5
Yasmin Bains, Alejandro Gugliucci
We have previously shown that Ilex paraguariensis extracts have potent antiglycation actions. Associations of excess free fructose consumption with inflammatory diseases have been proposed to be mediated through in situ enteral formation of fructose AGEs, which, after being absorbed may contribute to inflammatory diseases via engagement of RAGE. In this proof of principle investigation we show fluorescent AGE formation between amino acids (Arg, Lys, Gly at 10-50mM) and fructose (10-50mM) under time, temperature, pH and concentrations compatible with the digestive system lumen and its inhibition by Ilex paraguariensis extracts...
December 22, 2016: Fitoterapia
https://www.readbyqxmd.com/read/28011950/involvement-of-corticotropin-releasing-factor-and-corticotropin-releasing-factor-2-receptors-in-pathogenesis-of-ischemia-reperfusion-induced-enteritis-in-rats
#6
K Takeuchi, A Kumano, N Abe, T Kotani
We herein investigated, using a corticotropin-releasing factor (CRF) agonist and antagonists, whether CRF plays a role in the pathogenesis of ischemia/reperfusion-induced small intestinal lesions in rats. Under pentobarbital anesthesia, the superior mesenteric artery was clamped (ischemia) for 75 min, followed by reperfusion with removal of the clamp. After a 24-h reperfusion, the area of hemorrhagic lesions that developed in the small intestine was measured. Urocortin I (CRF receptor 1/2 agonist), astressin (CRF receptor 1/2 antagonist), NBI27914 (CRF receptor 1 antagonist), or astressin 2B (CRF receptor 2 antagonist) was administered i...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28005432/-catechin-prevents-methylglyoxal-induced-mitochondrial-dysfunction-and-apoptosis-in-ea-hy926-cells
#7
Tianyu Zhang, Yingying Mu, Mingqi Yang, Abdullah Al Maruf, Panpan Li, Chao Li, Shaohua Dai, Jiangyi Lu, Qiang Dong
OBJECTIVE: To investigate whether (+)-catechin, a strong antioxidant, can prevent methylglyoxal (MGO)-induced cytotoxicity and its mechanism. METHODS: Cytotoxicity, apoptosis, reactive oxygen species (ROS) generation, hydrogen peroxide (H2O2) formation, mitochondrial membrane potential (MMP) and mitochondrial morphology were measured in EA.hy926 cells. RESULT: MGO (4 mM)-induced cytotoxicity was markedly inhibited by (+)-catechin (0.1-4 mM) in 24 h...
December 22, 2016: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28004019/role-of-nitric-oxide-in-the-regulation-of-immune-responses-during-rabies-virus-infection-in-mice
#8
B P Madhu, K P Singh, M Saminathan, R Singh, N Shivasharanappa, A K Sharma, Yashpal S Malik, K Dhama, V Manjunatha
Rabies virus (RABV) stimulates nitric oxide (NO) production, which either triggers T cell differentiation or suppresses T cell function depending on its concentration. Herein, we assessed the potential role of NO in regulation of immune responses during RABV infection in mice model. The experimental animals were divided into four groups and 100LD50 of challenge virus standard (CVS) strain of RABV was inoculated intracerebrally on day 0 and subsequently aminoguanidine (AG; inducible nitric oxide synthase inhibitor) was injected intraperitoneally twice a day, up to 6 days...
December 2016: Virusdisease
https://www.readbyqxmd.com/read/27917279/minocycline-attenuates-cirrhotic-cardiomyopathy-and-portal-hypertension-in-a-rat-model-possible-involvement-of-nitric-oxide-pathway
#9
Seyyedeh Elaheh Mousavi, Seyed Mahdi Rezayat, Maliheh Nobakht, Seyed Soheil Saeedi Saravi, Iraj Yazdani, Amir Rashidian, Ahmad Reza Dehpour
OBJECTIVES: An increase in nitric oxide (NO) production has been reported in cirrhotic cardiomyopathy and, portal hypertension. Since minocycline has been shown to inhibit NO overproduction, we aimed to examine its role in a rat model of CCl4-induced cirrhotic cardiovascular complications. MATERIALS AND METHODS: Portal pressure and inotropic responsiveness of isolated papillary muscles to isoproterenol were measured in cirrhotic rats, following minocycline (50 mg/kg/day for 8 weeks) treatment...
November 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/27908707/the-role-of-nmda-receptor-and-nitric-oxide-cyclic-guanosine-monophosphate-pathway-in-the-antidepressant-like-effect-of-dextromethorphan-in-mice-forced-swimming-test-and-tail-suspension-test
#10
Ehsan Sakhaee, Sattar Ostadhadi, Muhammad Imran Khan, Farbod Yousefi, Abbas Norouzi-Javidan, Reyhaneh Akbarian, Mohsen Chamanara, Samira Zolfaghari, Ahmad-Reza Dehpour
Depression is a devastating disorder which has a high impact on the wellbeing of overall society. As such, need for innovative therapeutic agents are always there. Most of the researchers focused on N-methyl-d-aspartate receptor to explore the antidepressant like activity of new therapeutic agents. Dextromethorphan is a cough suppressant agent with potential antidepressant activity reported in mouse force swimming test. Considering N-methyl-d-aspartate as a forefront in exploring antidepressant agents, here we focused to unpin the antidepressant mechanism of dextromethorphan targeting N-methyl-d-aspartate receptor induced nitric oxide-cyclic guanosine monophosphate signaling...
January 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27899254/thalidomide-attenuates-the-development-and-expression-of-antinociceptive-tolerance-to-%C3%AE-opioid-agonist-morphine-through-l-arginine-inos-and-nitric-oxide-pathway
#11
Muhammad Imran Khan, Sattar Ostadhadi, Faiza Mumtaz, Majid Momeny, Farima Moghaddaskho, Mahsa Hassanipour, Shahram Ejtemaei-Mehr, Ahmad Reza Dehpour
Morphine is a μ-opioid analgesic drug which is used in the treatment and management of chronic pain. However, due to development of antinociceptive tolerance its clinical use is limited. Thalidomide is an old glutamic acid derivative which recently reemerged because of its potential to counteract a number of disorders including neurodegenerative disorders. The potential underlying mechanisms and effects of thalidomide on morphine-induced antinociceptive tolerance is still elusive. Hence, the present study was designed to explore the effect of thalidomide on the development and expression of morphine antinociceptive tolerance targeting l-arginine-nitric oxide (NO) pathway in mice and T98G human glioblastoma cell line...
January 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27875784/anticonvulsant-effect-of-dextrometrophan-on-pentylenetetrazole-induced-seizures-in-mice-involvement-of-nitric-oxide-and-n-methyl-d-aspartate-receptors
#12
Gholamreza Mohseni, Sattar Ostadhadi, Reyhaneh Akbarian, Mohsen Chamanara, Abbas Norouzi-Javidan, Ahmad-Reza Dehpour
Dextrometrophan (DM), widely used as an antitussive, has recently generated interest as an anticonvulsant drug. Some effects of dextrometrophan are associated with alterations in several pathways, such as inhibition of nitric oxide synthase (NOS) enzyme and N-methyl d-aspartate (NMDA) receptors. In this study, we aimed to investigate the anticonvulsant effect of acute administration of dextrometrophan on pentylenetetrazole (PTZ)-induced seizures and the probable involvement of the nitric oxide (NO) pathway and NMDA receptors in this effect...
December 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27851890/levosimendan-exerts-anticonvulsant-properties-against-ptz-induced-seizures-in-mice-through-activation-of-nnos-no-pathway-role-for-katp-channel
#13
Maziar Gooshe, Mohammad Tabaeizadeh, Ali Reza Aleyasin, Payam Mojahedi, Keyvan Ghasemi, Farbod Yousefi, Ali Vafaei, Hossein Amini-Khoei, Shayan Amiri, Ahmad Reza Dehpour
AIMS: Although approving new anticonvulsants was a major breakthrough in the field of epilepsy control, so far we have met limited success in almost one third of patients suffering from epilepsy and a definite and reliable method is yet to be found. Levosimendan demonstrated neuroprotective effects and reduced mortality in conditions in which seizure can be an etiology of death; however, the underlying neuroprotective mechanisms of levosimendan still eludes us. In the light of evidence suggesting levosimendan can be a KATP channel opener and nitrergic pathway activator, levosimendan may exert antiseizure effects through KATP channels and nitrergic pathway...
January 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/27843112/synthesis-and-biological-evaluation-of-chalcone-derivatives-containing-aminoguanidine-or-acylhydrazone-moieties
#14
Zhi-Yu Wei, Ke-Qiang Chi, Zhan-Kui Yu, Hong-Yan Liu, Liang-Peng Sun, Chang-Ji Zheng, Hu-Ri Piao
Three novel series of chalcone derivatives containing an aminoguanidine or acylhydrazone moiety were designed, synthesized and evaluated in terms of their antibacterial, antifungal and anti-inflammatory activities. Most of the synthesized compounds showed potent inhibitory activity towards various bacteria and one fungus with minimum inhibitory concentrations (MICs) ranging from 1 to 8μg/mL. Compared with our previously reported chalcone derivatives (MICs >64μg/mL), these compounds exhibited improved antibacterial activities (MICs=2μg/mL) against Gram-negative bacterial strains (Escherichia coli 1924 and 1356)...
December 15, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27802897/evidence-for-the-involvement-of-nitric-oxide-in-cholestasis-induced-itch-associated-response-in-mice
#15
Sattar Ostadhadi, Arash Foroutan, Majid Momeny, Abbas Norouzi-Javidan, Ehsan Azimi, Nastaran Kordjazy, Ahmad Reza Dehpour
Cholestasis is a major systemic disorder associated with distressing pruritus (itch). Nitric oxide (NO) is a neurotransmitter, assumed to be involved in pruritus. Based on over-production of NO in cholestatic liver diseases, this project aimed to investigate involvement of NO in cholestasis-related itch in mice. To achieve this, cholestasis was induced by bile duct ligation (BDL). Our results showed that BDL mice elicited significant itch on fifth and seventh day after the procedure. This scratching behavior was inhibited by intraperitoneal (IP) treatment of mice with non-selective NOS inhibitor N-nitro-l-arginine methyl ester (l-NAME; 3mg/kg) and inducible NOS (iNOS) inhibitor aminoguanidine (AG; 100mg/kg)...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27756748/metformin-improves-defective-hematopoiesis-and-delays-tumor-formation-in-fanconi-anemia-mice
#16
Qing-Shuo Zhang, Weiliang Tang, Matthew Deater, Ngoc Phan, Andrea N Marcogliese, Hui Li, Muhsen Al-Dhalimy, Angela Major, Susan Olson, Raymond J Monnat, Markus Grompe
Fanconi anemia (FA) is an inherited bone marrow failure disorder associated with a high incidence of leukemia and solid tumors. Bone marrow transplantation is currently the only curative therapy for the hematopoietic complications of this disorder. However, long-term morbidity and mortality remain very high, and new therapeutics are badly needed. Here we show that the widely used diabetes drug metformin improves hematopoiesis and delays tumor formation in Fancd2(-/-) mice. Metformin is the first compound reported to improve both of these FA phenotypes...
December 15, 2016: Blood
https://www.readbyqxmd.com/read/27731508/peripheral-blood-mononuclear-cells-infiltration-downregulates-decidual-faah-activity-in-an-lps-induced-embryo-resorption-model
#17
Manuel Luis Wolfson, Julieta Aisemberg, Fernando Correa, Ana María Franchi
Maternal infections with gram-negative bacteria are associated with miscarriage and are one of the most common complications during pregnancy. Previous studies from our group have shown that lipopolysaccharide (LPS)-activated infiltrating peripheral blood mononuclear cells (PBMC) into decidual tissue plays an important role in the establishment of a local inflammatory process that results in embryo cytotoxicity and early embryo resorption. Moreover, we have also shown that an increased endocannabinoid tone mediates LPS-induced deleterious effects during early pregnancy loss...
October 12, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27720762/pharmacological-analysis-of-hemodynamic-responses-to-lachesis-muta-south-american-bushmaster-snake-venom-in-anesthetized-rats
#18
Lourdes Dias, Mariana A P Rodrigues, Bruna R Inoue, Renata L Rodrigues, André L Rennó, Valéria B de Souza, Frank D Torres-Huaco, Norma C Sousa, Alessandra Stroka, Anibal R Melgarejo, Stephen Hyslop
In this work, we examined some mechanisms involved in the hypotension caused by Lachesis muta (South American bushmaster) venom in anesthetized rats. Venom (1.5 mg/kg, i.v.) caused immediate hypotension that was maximal after 5 min and gradually returned to baseline over 60 min. Pretreatment of rats with the non-selective nitric oxide synthase (NOS) inhibitor N(ω)-nitro-L-arginine methyl ester (L-NAME) did not attenuate the early phase of venom-induced hypotension, but abolished the recovery phase and resulted in rapid death; a similar effect was observed with the soluble guanylate cyclase (sGC) inhibitor ODQ...
December 1, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27717936/-alteration-mechanisms-of-oxidative-stress-at-periodontal-tissues-of-rats-in-a-simulated-periodontitis-and-elaborate-methods-of-their-correction
#19
Елена В Хмиль, Лилия И Ляшенко, Наталия В Янко, Дмитрий А Хмиль, Людмила Ф Каськова
INTRODUCTION: one of the peroxidation stress mechanisms is inducible NO synthase (iNOS) expression involved in the pathogenesis of periodontitis. AIM: to access the influence of isoform NO synthase (NOS) on alteration mechanisms of oxidative stress at periodontal tissues of 50 mature rats in a simulated periodontitis (SP). MATERIALS AND METHODS: a SP at rats was induced by a high-carbohydrate, high-fat (HCHF) diet. Тreated SP rat groups were intragastrically administered with selective neuronal NOS (nNOS) inhibitor 7-nitroindazole, selective inducible NOS (iNOS) inhibitor aminoguanidine, and nitric oxide synthase substrate L-arginine...
2016: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/27717924/-mechanisms-of-nitroxide-ergic-dysregulation-in-tissues-of-parodontium-in-rats-under-combined-excessive-sodium-nitrate-and-fluoride-intake
#20
Алексей В Богданов, Юлия М Гришко, Виталий А Костенко
INTRODUCTION: intake of inorganic nitrates is typically accompanied by production of excessive amount of nitric oxide (NO), which level is maintained by the mechanism of autoregulation known as the NO cycle. Hypothetically, this process may be disrupted with fluorides that are able to suppress arginase pathway of L-arginine metabolism, which competes with NO-synthase pathway. AIM: to study mechanisms of disregulation of oxidative (NO-synthase) and non-oxidative (arginase) metabolic pathways of L-arginine in the tissues of periodontium under combined excessive sodium nitrate and fluoride intake...
2016: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
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