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Sodium nitroprusside

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https://www.readbyqxmd.com/read/28212586/effects-of-resistance-band-exercise-on-vascular-activity-and-fitness-in-older-adults
#1
Mark F Smith, Mistrelle Ellmore, Geoff Middleton, Paul M Murgatroyd, Thomas I Gee
This study investigated the effects of a low to moderately intense resistance-band exercise intervention on cutaneous microvascular function in an older population. 18 sedentary healthy participants (age: 58±5) were assessed for their upper and lower-limb endothelial cutaneous vascular conductance using laser Doppler fluximetry with endothelial-dependent (80 μl acetylcholine chloride), and -independent vasodilation (80 μl sodium nitroprusside). In addition, participants underwent a range of functional assessments (cardiopulmonary fitness, strength, flexibility), and completed a perceived quality of life questionnaire...
February 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28202549/relationships-between-type-2-diabetes-neuropathy-and-microvascular-dysfunction-evidence-from-patients-with-cryptogenic-axonal-polyneuropathy
#2
Anna L Emanuel, Mariska D Nieuwenhoff, Erica S Klaassen, Ajay Verma, Mark H H Kramer, Rob Strijers, Alexander F J E Vrancken, Etto Eringa, Geert Jan Groeneveld, Erik H Serné
OBJECTIVE: This study investigated whether the relationship between neuropathy and microvascular dysfunction in patients with type 2 diabetes is independent of diabetes-related factors. For this purpose, we compared skin microvascular function in patients with type 2 diabetes with that of patients with cryptogenic axonal polyneuropathy (CAP), a polyneuropathy of unknown etiology. RESEARCH DESIGN AND METHODS: Cross-sectional information was collected from 16 healthy controls (HCs), 16 patients with CAP, 15 patients with type 2 diabetes with polyneuropathy (DPN), and 11 patients with type 2 diabetes without polyneuropathy...
February 15, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28202441/effect-of-hypohydration-on-postsynaptic-cutaneous-vasodilation-and-sweating-in-healthy-men
#3
Matthew A Tucker, Ashley Six, Nicole E Moyen, Alf Z Satterfield, Matthew S Ganio
: Hypohydration decreases cutaneous vasodilation and sweating during heat stress, but it is unknown if these decrements are from postsynaptic (i.e. sweat gland/blood vessel) alterations. PURPOSE: To determine if hypohydration affects postsynaptic cutaneous vasodilation and sweating responses. METHODS: 12 healthy men participated in euhydrated (EU) and hypohydrated (HY) trials, with hypohydration induced via fluid restriction and passive heat-stress...
February 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28190469/proanthocyanidins-from-vitis-vinifera-inhibit-oxidative-stress-induced-vascular-impairment-in-pulmonary-arteries-from-diabetic-rats
#4
Christian Pinna, Paolo Morazzoni, Angelo Sala
BACKGROUND: Vitis vinifera L. (grape seed extract) is a natural source of proanthocyanidins with antioxidant and free radical-scavenging activities. HYPOTHESIS: Grape seed extract supplementation may prevent vascular endothelium impairment associated with diabetes mellitus in rat pulmonary artery. STUDY DESIGN: We evaluated endothelial function of rat pulmonary artery ex-vivo at the intermediate stage (4 weeks) of streptozotocin (STZ)-induced diabetes mellitus...
February 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28187467/protective-effects-of-ellagic-acid-on-cardiovascular-injuries-caused-by-hypertension-in-rats
#5
Juliana Bahia Reis Jordão, Hellen Karine Paes Porto, Flávio Marques Lopes, Aline Carvalho Batista, Matheus Lavorenti Rocha
Ellagic acid is described as having antioxidant and antiproliferative properties. Hence, it was hypothesized that ellagic acid could improve cardiovascular damage caused by hypertension. In this work, hypertension was induced in rats with Nω-Nitro-L-arginine methyl ester hydrochloride (60 mg/kg/day in drinking water) for 6 weeks. Ellagic acid was coadministered (10 or 30 mg/kg/day by gavage) between the second and sixth week. Blood pressure was recorded every week by tail-cuff plethysmography. After 6 weeks, the rats were sacrificed, the hearts and kidneys were weighed, and blood was collected...
February 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28183353/endothelial-injury-in-rheumatoid-arthritis-a-crosstalk-between-dimethylarginines-and-systemic-inflammation
#6
Theodoros Dimitroulas, James Hodson, Aamer Sandoo, Jacqueline Smith, George D Kitas
BACKGROUND: Symmetric (SDMA) and asymmetric (ADMA) dimethylarginines have emerged as novel biomarkers of cardiovascular disease (CVD) in several disease settings associated with atherosclerosis. Rheumatoid arthritis (RA) is a chronic systemic inflammatory disease characterized by high CVD mortality and morbidity. ADMA and SDMA levels are abnormal in RA patients, but their correlation with assessments of endothelial function and structure remains unknown. We aimed to investigate whether SDMA and ADMA are associated with carotid intima media thickness (cIMT) and arterial stiffness as well as non-invasive assessments of in vivo micro- and macrovascular endothelial function in RA patients with high systemic inflammatory load...
February 10, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28168354/the-endophytic-fungus-phomopsis-liquidambari-increases-nodulation-and-n2-fixation-in-arachis-hypogaea-by-enhancing-hydrogen-peroxide-and-nitric-oxide-signalling
#7
Xing-Guang Xie, Wan-Qiu Fu, Feng-Min Zhang, Xiao-Min Shi, Ying-Ting Zeng, Hui Li, Wei Zhang, Chuan-Chao Dai
The continuous cropping obstacles in monoculture fields are a major production constraint for peanuts. Application of the endophytic fungus Phomopsis liquidambari has increased peanut yields, and nodulation and N2 fixation increases have been considered as important factors for P. liquidambari infection-improved peanut yield. However, the mechanisms involved in this process remain unknown. This work showed that compared with only Bradyrhizobium inoculation, co-inoculation with P. liquidambari significantly elevated endogenous H2O2 and NO levels in peanut roots...
February 6, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28165429/the-dynamics-of-the-defense-strategy-of-pea-induced-by-exogenous-nitric-oxide-in-response-to-aphid-infestation
#8
Agnieszka Woźniak, Magda Formela, Piotr Bilman, Katarzyna Grześkiewicz, Waldemar Bednarski, Łukasz Marczak, Dorota Narożna, Katarzyna Dancewicz, Van Chung Mai, Beata Borowiak-Sobkowiak, Jolanta Floryszak-Wieczorek, Beata Gabryś, Iwona Morkunas
The aim of this study was to investigate the effect of exogenous nitric oxide (NO), i.e., S-nitrosoglutathione (GSNO) and sodium nitroprusside (SNP), on the metabolic status of Pisum sativum L. cv. Cysterski leaves infested by Acyrthosiphon pisum Harris, population demographic parameters and A. pisum feeding activity. A reduction in the level of semiquinone radicals in pea seedling leaves pretreated with exogenous NO occurred 24 h after A. pisum infestation, which was earlier than in non-pretreated leaves. A decrease in the level of O₂(•-) was observed in leaves pretreated with GSNO and infested by aphids at 48 and 72 h post-infestation (hpi)...
February 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28155571/the-augmentation-of-bk-channel-activity-by-nitric-oxide-signaling-in-rat-cerebral-arteries-involves-co-localized-regulatory-elements
#9
Barry D Kyle, Ramesh C Mishra, Andrew P Braun
Large conductance, Ca(2+)-activated K(+) (BK) channels control cerebrovascular tone; however, the regulatory processes influencing these channels remain poorly understood. Here, we investigate the cellular mechanisms underlying the enhancement of BK current in rat cerebral arteries by nitric oxide (NO) signaling. In isolated cerebral myocytes, BK current magnitude was reversibly increased by sodium nitroprusside (SNP, 100 μM) and sensitive to the BK channel inhibitor, penitrem-A (100 nM). Fostriecin (30 nM), a protein phosphatase type 2A (PP2A) inhibitor, significantly prolonged the SNP-induced augmentation of BK current and a similar effect was produced by sildenafil (30 nM), a phosphodiesterase 5 (PDE5) inhibitor...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28144845/gastric-vascular-and-motor-responses-to-anaphylactic-hypotension-in-anesthetized-rats-in-comparison-to-those-with-hemorrhagic-or-vasodilator-induced-hypotension
#10
Yuhichi Kuda, Toshishige Shibamoto, Tao Zhang, Wei Yang, Mamoru Tanida, Yasutaka Kurata
Anaphylactic shock is life-threatening, but pathophysiology of the stomach lesion remains unclear. We determined gastric hemodynamics and gastric functions during anaphylactic hypotension, as compared to hypotension induced by hemorrhage or sodium nitroprusside (SNP) in anesthetized and ovalbumin-sensitized Sprague-Dawley rats. Systemic arterial pressure, portal venous pressure, and gastric arterial blood flow were measured, and gastric vascular resistance (GVR) was determined. Separately, the intragastric pressure (IGP) and gastric effluent, as a measure of gastric flux, were continuously measured...
January 31, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28142110/role-of-two-sided-crosstalk-between-no-and-h2s-on-improvement-of-mineral-homeostasis-and-antioxidative-defense-in-sesamum-indicum-under-lead-stress
#11
Rayhaneh Amooaghaie, Faezeh Zangene-Madar, Shekoofeh Enteshari
H2S and NO are two important gasotransmitters that modulate stress responses in plants. There are the contradictory data on crosstalk between NO and H2S in the studies. Hence, in the present study, the role of interplay between NO and H2S was assessed on the Pb tolerance of Sesamum indicum using pharmacological and biochemical approaches. Results revealed that Pb stress reduced the plant growth and the content of photosynthetic pigments and Fv/Fm ratio, increased the lipid peroxidation and the H2O2 content, elevated the endogenous contents of nitric oxide (NO), H2S and enhanced the activities of antioxidant enzymes (except APX)...
January 28, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28125624/clonidine-versus-captopril-for-severe-postpartum-hypertension-a-randomized-controlled-trial
#12
Carlos Noronha Neto C, Sabina S B Maia, Leila Katz, Isabela C Coutinho, Alex R Souza, Melania M Amorim
BACKGROUND: Changes during the puerperium are still unclear, particularly in women with hypertension. The choice of antihypertensives, both to control very high blood pressure episodes and to keep blood pressure stable, also requires further elucidation. Currently, there are no clear data to guide the decision for the choice of postpartum antihypertensives. Captopril plays an important role in the treatment of very high blood pressure episodes and may be used postpartum. Clonidine has been used as an alternative in pregnant or postpartum women with contraindications to captopril, with satisfactory effect...
2017: PloS One
https://www.readbyqxmd.com/read/28116730/evaluation-of-endothelial-dysfunction-in-vivo
#13
Mihail Todiras, Natalia Alenina, Michael Bader
Vascular endothelial cells play a major role in maintaining cardiovascular homeostasis. Impairment of physiological properties of the endothelium, such as the promotion of vasodilation and anti-aggregation, leads to a condition called endothelial dysfunction. Endothelial dysfunction is an important early event in the pathogenesis of atherosclerosis and has been shown to have prognostic value in predicting vascular events including stroke and myocardial infarction.Endothelial-dependent vasodilation is one of the most widely used methods for assessment of endothelial function in rodents...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28112079/reply-to-letter-to-the-editor-sodium-nitroprusside-for-schizophrenia-could-methodological-variables-account-for-the-different-results-obtained
#14
J Stone, I Koychev, T Reilly, P McGuire
No abstract text is available yet for this article.
January 23, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28106663/the-role-of-laser-doppler-flowmetry-tests-serum-angiopoietin-2-asymmetric-and-symmetric-dimethylarginine-to-predict-outcome-in-chronic-kidney-disease
#15
János Nemcsik, Orsolya Cseprekál, József Egresits, Jan Kielstein, Philipp Kümpers, Alexander Lukasz, Ádám Tabák, Adrienn Marton, Zsófia K Németh, Zoltán Járai, Gabriella Godina, László Sallai, Katalin Farkas, István Kiss, András Tislér
OBJECTIVE: The role of biochemical and functional markers of microvascular dysfunction to predict cardiovascular outcomes in nondialyzed chronic kidney disease (CKD) remains unclear. In this prospective cohort study, we assessed whether biochemical [serum level of angiopoietin-2 (Ang-2), asymmetric and symmetric dimethylarginin] and functional (laser Doppler flowmetry) measures of microvascular function predicted cardiovascular events, cardiovascular and all-cause mortality in CKD patients...
January 18, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28102843/il-17-mediated-mitochondrial-dysfunction-impairs-apoptosis-in-rheumatoid-arthritis-synovial-fibroblasts-through-activation-of-autophagy
#16
Eun Kyung Kim, Jeong-Eun Kwon, Seon-Young Lee, Eun-Jung Lee, Da Som Kim, Su-Jin Moon, Jennifer Lee, Seung-Ki Kwok, Sung-Hwan Park, Mi-La Cho
Fibroblast-like synoviocytes (FLSs) are a major cell population of the pannus that invades cartilage and bone in rheumatoid arthritis (RA). FLS resistance to apoptosis is a major characteristic of RA. The aims of this study were to investigate the effects of interleukin-17 (IL-17) and IL-17-producing T helper (Th17) cells on resistance to apoptosis in FLSs from RA patients (RA FLSs) and their roles in mitochondrial dysfunction and autophagy. Mitochondrial function was assessed in RA FLSs and FLSs from osteoarthritis patients (OA FLSs)...
January 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28068359/docosahexaenoic-acid-supplemented-diet-influences-the-orchidectomy-induced-vascular-dysfunction-in-rat-mesenteric-arteries
#17
Diva M Villalpando, Rocío Navarro, Lara Del Campo, Carlota Largo, David Muñoz, María Tabernero, Ramiro Baeza, Cristina Otero, Hugo S García, Mercedes Ferrer
Over the past few decades, the cardiovascular benefits of a high dietary intake of long-chain polyunsaturated fatty acids (PUFAs), like docosahexaenoic acid (DHA), have been extensively studied. However, many of the molecular mechanisms and effects exerted by PUFAs have yet to be well explained. The lack of sex hormones alters vascular tone, and we have described that a DHA-supplemented diet to orchidectomized rats improve vascular function of the aorta. Based on these data and since the mesenteric artery importantly controls the systemic vascular resistance, the objective of this study was to analyze the effect of a DHA-supplemented diet on the mesenteric vascular function from orchidectomized rats...
2017: PloS One
https://www.readbyqxmd.com/read/28064177/nitric-oxide-acts-upstream-of-ethylene-in-cell-wall-phosphorus-reutilization-in-phosphorus-deficient-rice
#18
Xiao Fang Zhu, Chun Quan Zhu, Chao Wang, Xiao Ying Dong, Ren Fang Shen
Nitric oxide (NO) and ethylene are both involved in cell wall phosphorus (P) reutilization in P-deficient rice; however, the crosstalk between them remains unclear. In the present study using P-deficient 'Nipponbare' (Nip), root NO accumulation significantly increased after 1 h and reached a maximum at 3 h, while ethylene production significantly increased after 3 h and reached a maximum at 6 h, indicating NO responded more quickly than ethylene. Irrespective of P status, addition of the NO donor sodium nitroprusside (SNP) significantly increased while the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (c-PTIO) significantly decreased the production of ethylene, while neither the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) nor the ethylene inhibitor aminoethoxyvinylglycine (AVG) had any influence on NO accumulation, suggesting NO acted upstream of ethylene...
January 7, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28057563/uric-acid-and-endothelial-function-in-elderly-community-dwelling-subjects
#19
Andrea Ticinesi, Fulvio Lauretani, Gian Paolo Ceda, Carmelinda Ruggiero, Luigi Ferrucci, Rosalia Aloe, Anders Larsson, Tommy Cederholm, Lars Lind, Tiziana Meschi, Marcello Maggio
The role of serum uric acid (SUA), an inflammatory agent and potential mediator of cardiovascular diseases, in endothelial function (EF) has been tested only in middle-aged subjects affected by specific diseases. Our aim was to assess the relationship between SUA and measures of EF in a cohort of elderly community-dwellers. This study involved 424 males and 426 females aged 70years from the Prospective Study of the Vasculature in Uppsala Seniors (PIVUS), having complete data on SUA and EF assessed by flow-mediated vasodilation (FMD) and by intra-arterial infusion of acetylcholine (endothelium-dependent vasodilation, EDV) and sodium nitroprusside (endothelium-independent vasodilation, EIDV)...
January 2, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28052641/protective-effects-of-melatonin-on-the-activity-of-sod-cat-gsh-px-and-gsh-content-in-organs-of-mice-after-administration-of-snp
#20
Zofia Goc, Waldemar Szaroma, Edyta Kapusta, Karol Dziubek
Sodium nitroprusside (SNP) is an antihypertensive drug with proven dose-dependent toxic effects attributed mainly to the production of cyanide but also excesive nitric oxide (NO) and derived reactive species. The present study evaluated whether melatonin administration would have time-dependent protective effect against SNP−induced toxicity. Male Swiss mice were used in this study. Control mice were treated with 0.9% NaCl; the second group was injected with 10 mg melatonin (MEL)/kg body weight (b.w.); the third group was given SNP at the dose of 3,6 mg/kg b...
28, 2017: Chinese Journal of Physiology
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