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Nitric Oxide

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https://www.readbyqxmd.com/read/28734159/development-of-a-lc-ms-ms-method-for-the-determination-of-ckd-712-in-rat-plasma-application-to-a-pharmacokinetic-study-in-rats
#1
Jung-Woo Chae, Hwi-Yeol Yun, Han Young Eom, Eun Ju Jeong, Tae-Sung Koo, Kwang-Il Kwon, Jong-Hwa Lee
CKD-712 is a potential treatment for sepsis, as it exhibits protective effects against lipopolysaccharide-mediated platelet aggregation, inducible nitric oxide synthase expression, and cecum-ligation puncture-induced septic mortality in mice. In this study, we develop a rapid and sensitive LC-MS/MS method for determining CKD-712 in rat plasma. CKD-712 and papaverine hydrochloride (an internal standard) were analyzed using an LC-MS/MS system consisting of an Agilent HPLC system (HP-1100) equipped with an Atlantis HILIC Silica (2...
July 8, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28732069/saccharomyces-boulardii-cncm-i-745-supplementation-reduces-gastrointestinal-dysfunction-in-an-animal-model-of-ibs
#2
Paola Brun, Melania Scarpa, Chiara Marchiori, Gloria Sarasin, Valentina Caputi, Andrea Porzionato, Maria Cecilia Giron, Giorgio Palù, Ignazio Castagliuolo
BACKGROUND: We evaluated the effect of Saccharomyces boulardii CNCM I-745 on intestinal neuromuscular anomalies in an IBS-type mouse model of gastrointestinal motor dysfunctions elicited by Herpes Simplex Virus type 1 (HSV-1) exposure. METHODS: Mice were inoculated intranasally with HSV-1 (102 PFU) or vehicle at time 0 and 4 weeks later by the intragastric (IG) route (108 PFU). Six weeks after IG inoculum, mice were randomly allocated to receive oral gavage with either S...
2017: PloS One
https://www.readbyqxmd.com/read/28731589/effects-of-nitric-oxide-on-large-conductance-ca-2-activated-k-currents-in-human-cardiac-fibroblasts-through-pka-and-pkg-related-pathways
#3
Hyemi Bae, Inja Lim
The human cardiac fibroblast (HCF) is the most abundant cell type in the myocardium, and HCFs play critical roles in maintaining normal cardiac function. However, unlike cardiomyocytes, the electrophysiology of HCFs is not well established. In the cardiovascular system, Ca(2+) -activated K(+) (KCa) channels have distinct physiological and pathological functions, and nitric oxide (NO) play key roles. In this study, we investigated the potential effects of NO on KCa channels in HCFs. We recorded strong oscillating, well-maintained outward K(+) currents without marked inactivation throughout the test pulse period and detected outward rectification in the I-V curve; these are all characteristics that are typical of KCa currents...
July 21, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28731412/lung-sound-analysis-is-useful-for-monitoring-therapy-in-patients-with-bronchial-asthma
#4
T Shimoda, Y Obase, Y Nagasaka, H Nakano, R Kishikawa, T Iwanaga
BACKGROUND AND OBJECTIVE: Lung sound analysis (LSA) has been reported to be useful for predicting airway obstruction and inflammation in patients with bronchial asthma. Objectives: We examined whether the exhalation-to-inhalation sound pressure ratio in the middle frequency range (200-400 Hz) (E/I MF) is useful for monitoring therapy in patients with asthma. METHODS: The study population comprised 84 patients with mild to moderate asthma whose LSA data were available before and after 1 year of daily treatment with (budesonide 800 μg)...
2017: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/28731365/chemical-composition-and-antimigraine-activity-of-essential-oil-of-angelicae-dahuricae-radix
#5
Jingbo Sun, He Li, Jinghui Sun, Huimin Liu, Jianguang Chen, Chunmei Wang
The aim of this study was to explore the chemical composition and the effect of essential oil of Angelicae dahuricae radix on a nitroglycerin (NTG)-induced rat model of migraine. The CO2 supercritical fluid extraction method was optimized for the extraction of essential oil of A. dahuricae radix (EOAD) and its chemical composition was determined. The migraine model was established by subcutaneous injection of NTG (10 mg/kg) 1 h after the last administration of EOAD. The therapeutic effect of EOAD and its underlying mechanism were assessed by monitoring behavioral changes, levels of nitric oxide (NO) in serum and brain tissues, plasma levels of calcitonin gene-related peptide (CGRP) and endothelin (ET), and ET/NO ratio...
July 21, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28731262/nephroprotective-effects-of-anthocyanin-from-the-fruits-of-panax-ginseng-gfa-on-cisplatin-induced-acute-kidney-injury-in-mice
#6
Zhen-Lan Qi, Zi Wang, Wei Li, Jin-Gang Hou, Ying Liu, Xin-Dian Li, Hui-Ping Li, Ying-Ping Wang
Cisplatin is an effective anticancer chemotherapeutic agent, but the use of cisplatin in the clinic is severely limited by side effects. Nephrotoxicity is a major factor that contributes to the side effects of cisplatin chemotherapy. The aim of this research was to survey the nephroprotective effects of anthocyanin from the fruits of Panax ginseng (GFA) in a murine model of cisplatin-induced acute kidney injury. We observed that pretreatment with GFA attenuated cisplatin-induced elevations in blood urea nitrogen and creatinine levels and histopathological injury induced by cisplatin...
July 21, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28731225/decreased-levels-of-pdi-and-p5-in-oligodendrocytes-in-alzheimer-s-disease
#7
Yasuyuki Honjo, Takashi Ayaki, Takami Tomiyama, Tomohisa Horibe, Hidefumi Ito, Hiroshi Mori, Ryosuke Takahashi, Koji Kawakami
Protein disulfide isomerase (PDI) is a chaperone protein located in the endoplasmic reticulum (ER). Nitric oxide-induced S-nitrosylation of PDI inhibits its enzymatic activity, leading to protein accumulation and activation of the unfolded protein response. Protein disulfide isomerase P5 (P5) is a member of the PDI family that mostly localizes to the ER lumen. Both S-nitrosylated PDI and S-nitrosylated P5 are found in Alzheimer's disease (AD) brain. Previously, we showed that expression of the ER stress marker, growth arrest, and DNA damage protein (GADD34) was significantly increased in neurons and oligodendrocytes in AD brain...
July 21, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28731176/hypotonic-contrast-media-is-more-toxic-than-isotonic-contrast-media-on-endothelial-cells-in-vivo-and-in-vitro
#8
Lihui Ren, Ping Wang, Zuoyan Wang, Yong Liu, Shuzheng Lv
The aim of the current study was to investigate the cytotoxic effects of hypotonic (iopamidol) and isotonic (iodixanol) contract media (CMs) in vitro and in vivo. A total of 60 Wistar rats were included and were randomly divided into three groups (20 rats per group). Iodixanol (4 g iodine/kg), iopamidol (4 g iodine/kg) or equal volume of normal saline was injected via tail vein. HUVEC and H5V cell viability was determined by Cell Counting Kit‑8 agents. Western blotting was performed to detect ATP‑binding cassette subfamily G member 1 (ABCG1) expression...
July 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731170/isorhamnetin-inhibits-il%C3%A2-1%C3%AE-%C3%A2-induced-expression-of-inflammatory-mediators-in-human-chondrocytes
#9
Jin Li, Ruishan Wu, Xiaoping Qin, Dongyang Liu, Fenjie Lin, Qinglu Feng
Isorhamnetin (ISH) is a flavonoid primarily obtained from the fruit of Hippophae rhamnoides L., which possesses anti‑inflammatory properties. However, the effect of ISH on the expression of inflammatory mediators in response to interleukin (IL)‑1β stimulation has not been elucidated. The present study investigated the effects of ISH on the expression of inflammatory mediators in human chondrocytes, induced by IL‑1β. The results of the present study demonstrated that pretreatment with ISH inhibited the expression of stromelysin‑1 and collagenase 3 in chondrocytes, induced by IL‑1β...
July 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731130/effects-of-reduced-%C3%AE-2-glycoprotein-i-on-high-glucose%C3%A2-induced-cell-death-in-huvecs
#10
Jing-Yun Zhang, Jun Ma, Pei Yu, Guang-Jie Tang, Chun-Jun Li, De-Min Yu, Qiu-Mei Zhang
Reduced β2 glycoprotein I (β2GPI) has been demonstrated to exhibit a beneficial effect in diabetic atherosclerosis and retinal neovascularization. However, the effect of reduced β2GPI on vascular disorders in diabetic mellitus (DM) remains to be elucidated. The present study established a high glucose‑induced injury model using human umbilical cords veins (HUVECs) and evaluated the protective effects of reduced β2GPI against the injury. The data demonstrated that a low concentration of reduced β2GPI (0...
July 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731123/lasiodiplactone-a-a-novel-lactone-from-the-mangrove-endophytic-fungus-lasiodiplodia-theobromae-zj-hq1
#11
Senhua Chen, Zhaoming Liu, Hongju Liu, Yuhua Long, Dongni Chen, Yongjun Lu, Zhigang She
Lasiodiplactone A (1), an unprecedented lactone, was obtained from the mangrove endophytic fungus Lasiodiplodia theobromae ZJ-HQ1. The structure of 1 was established by analysis of NMR spectroscopic data and electronic circular dichroism (ECD) spectra. Lasiodiplactone A (1) was the first example of lactone that possesses a unique tetracyclic system (12/6/6/5) of RAL12 (12-membered β-resorcylic acid lactone) with a pyran ring and a furan ring. A possible biogenetic pathway for 1 was proposed. Compound 1 showed anti-inflammatory activity by inhibiting nitric oxide (NO) production in lipopolysaccharide activated in RAW264...
July 21, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28730947/safety-of-nitric-oxide-added-to-the-ecmo-circuit-a-pilot-study-in-children
#12
Roberto Chiletti, Steve Horton, Andrzej Bednarz, Robert Bartlett, Warwick Butt
We describe our experience of 30 consecutive children supported with ECMO and receiving 20 ppm of nitric oxide in the oxygenator of the ECMO circuit. Administration of nitric oxide into the ECMO circuit is safe and could potentially mitigate ischaemia reperfusion injury and end-organ dysfunction of children requiring mechanical support.
July 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28730377/influence-of-vitamin-d-and-cotinine-on-t-regulatory-cells-and-asthma-severity-in-children
#13
Bolesław Kalicki, Agata Wawrzyniak, Agnieszka Lipińska-Opałka, Sławomir Lewicki, Robert Zdanowski
Asthma is a common chronic respiratory diseases in children. Understanding the immune mechanisms of epigenetic factors may contribute to a better control of asthma. This study seeks to determine the effects of serum vitamin D and urine cotinine on asthma severity and on T regulatory cells (Tregs) and other immune-related factors such as CD3, CD4, CD8, CD19, CD16/56, and anti-CD3 HLA-DR3. The study involved 34 children with asthma. Disease severity was assessed with the Asthma Control Test, spirometry, and the fractional exhaled nitric oxide (FeNO)...
July 21, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28729391/edward-f-adolph-distinguished-lecture-skin-deep-insights-into-vascular-aging
#14
W Larry Kenney
The skin is an accessible model circulation for studying vascular function and dysfunction across the lifespan. Age-related changes, as well as those associated with disease progression, often appear first in the cutaneous circulation. Further, impaired vascular signaling and attendant endothelial dysfunction -- one of the earliest indicators of cardiovascular pathogenesis -- occurs in a similar fashion across multiple tissue beds throughout the body including the skin. Because microvascular dysfunction is a better predictor of long term outcomes and adverse cardiovascular events than is large vessel disease, understanding age-associated changes in the control of the human cutaneous microcirculation is important...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28729246/vagally-mediated-effects-of-brainstem-dopamine-on-gastric-tone-and-phasic-contractions-of-the-rat
#15
Laura Anselmi, Luca Toti, Cecilia Bove, R Alberto Travagli
Dopamine (DA) containing fibers and neurons are embedded within the brainstem dorsal vagal complex (DVC); we have shown previously that DA modulates the membrane properties of neurons of the dorsal motor nucleus of the vagus (DMV) via DA1 and DA2 receptors. The vagally-dependent modulation of gastric tone and phasic contractions, i.e. motility, by DA, however, has not been characterized. Using microinjections of DA in the DVC while recording gastric tone and motility, the aims of the present study were: i) assess the gastric effects of brainstem DA application, ii) identify the DA receptor subtype, and, iii) identify the postganglionic pathway(s) activated...
July 20, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28729226/solanum-paniculatum-l-decreases-levels-of-inflammatory-cytokines-by-reducing-nf-%C3%AE%C2%BAb-t-bet-and-gata3-gene-expression-in-vitro
#16
Raimon Rios, Hugo Bernardino Ferreira da Silva, Norma Vilany Queiroz Carneiro, Anaque de Oliveira Pires, Tamires Cana Brasil Carneiro, Ryan Dos Santos Costa, Cintia Rodrigues Marques, Marta Santos Serafim Machado, Eudes da Silva Velozo, Telma M G da Silva, Tania M S da Silva, Adilva de Souza Conceição, Neuza Maria Alcântara-Neves, Camila Alexandrina Figueiredo
ETHNOPHARMACOLOGICAL RELEVANCE: Solanum paniculatum L., popularly known as jurubeba, is a common subtropical plant from Brazil, Paraguay, Bolivia, and Argentina, that is used in folk medicine for the treatment of anemia, gastrointestinal disorders and inflammatory conditions in general. In addition to that, an ethnobotanical survey in "Todos os Santos" Bay have pointed out S. paniculatum as an herb to treat asthma. Previous publications have shown that S. paniculatum possesses antibiotic, antioxidant and modulatory effects on gastric acid secretion; however, its anti-inflammatory potential remains unexplored...
July 17, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28729163/computational-analysis-of-interactions-of-oxidative-stress-and-tetrahydrobiopterin-reveals-instability-in-enos-coupling
#17
Sheetal Joshi, Saptarshi Kar, Mahendra Kavdia
In cardiovascular and neurovascular diseases, an increase in oxidative stress and endothelial dysfunction has been reported. There is a reduction in tetrahydrobiopterin (BH4), which is a cofactor for the endothelial nitric oxide synthase (eNOS), resulting in eNOS uncoupling. Studies of the enhancement of BH4 availability have reported mixed results for improvement in endothelial dysfunction. Our understanding of the complex interactions of eNOS uncoupling, oxidative stress and BH4 availability is not complete and a quantitative understanding of these interactions is required...
July 17, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28728928/gtf-231-a-mixture-of-gymnemic-acid-trigonelline-and-ferulic-acid-significantly-ameliorates-oxidative-stress-in-experimental-type-2-diabetes-in-rats
#18
Roshana Devi Vellai, Sharmila Chandiran, Subramanian Sorimuthu Pillai
OBJECTIVES: According to a report by the United States National Health and Nutrition Examination Survey, nearly 60% of patients with diabetes have more than one complication caused by chronic diabetes. Type 2 diabetes is a multifactorial metabolic disorder that accounts for more than 95% of people with diabetes and usually requires multitargeted therapeutic interventions. It arises due to insufficient insulin secretion or its action or both. Recently, we reported that the oral administration of gymnemic acid, trigonelline and ferulic acid in the ratio of 2:3:1 (GTF-231), a mixture of 3 phytoingredients at a concentration of 300 mg/kg body weight significantly improved the glucose homeostasis in rats with low-dose streptozotocin-induced type 2 diabetes that were fed with high-fat diet...
July 17, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28728011/anti-inflammatory-effect-of-sugar-amino-acid-maillard-reaction-products-on-intestinal-inflammation-model-in%C3%A2-vitro-and-in%C3%A2-vivo
#19
Jun-Gu Oh, Su-Hyun Chun, Da Hyun Kim, Jin Hye Kim, Hye Soo Shin, Yong Soo Cho, Yong Ki Kim, Hee-Don Choi, Kwang-Won Lee
The Maillard reaction is a nonenzymatic reaction between an amino acid and a reducing sugar that usually occurs upon heating. This reaction occurs routinely in cooking, generates numerous products, which are collectively referred to as Maillard reaction products (MRPs) contributing to aroma and color features. Advanced glycation end-products (AGEs) transformed from MRPs are participated in many types of inflammation reaction. In this study, various sugar-amino acid MRPs were prepared from three different amino acids (lysine, arginine, and glycine) and sugars (glucose, fructose, and galactose) for 1 h with heating at 121 °C...
July 11, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28727928/vascular-senescence-and-ageing-a-role-for-the-meox-proteins-in-promoting-endothelial-dysfunction
#20
Josette Northcott, Michael Paul Czubryt, Jeffrey T Wigle
In the vascular system, ageing is accompanied by the accrual of senescent cells and is associated with an increased risk of vascular disease. Endothelial cell (EC) dysfunction is a hallmark of vascular disease and is characterized by decreased angiogenic potential, reduced nitric oxide bioavailability, impaired vasodilation, increased production of ROS and enhanced inflammation. In ECs, the major producer of nitric oxide is the endothelial nitric oxide synthase (eNOS) enzyme that is encoded by the NOS3 gene...
July 20, 2017: Canadian Journal of Physiology and Pharmacology
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