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https://www.readbyqxmd.com/read/28218702/phytochemical-study-of-tapirira-guianensis-leaves-guided-by-vasodilatory-and-antioxidant-activities
#1
Amélia M G Rodrigues, Denise O Guimarães, Tatiana U P Konno, Luzineide W Tinoco, Thiago Barth, Fernando A Aguiar, Norberto P Lopes, Ivana C R Leal, Juliana M Raimundo, Michelle F Muzitano
The aim of this research was to perform a phytochemical study of the methanol leaves extract of T. guianensis (MET) guided by vasodilatory and antioxidant activities. The chemical profile of MET and the ethyl acetate fraction (EA fraction) was determined by HPLC-UV-MS and EA fraction guided fractionation by reverse-phase chromatography. The vasorelaxant effects of MET, fractions, sub-fractions and constituents were assessed on rat aorta pre-contracted with phenylephrine. Antioxidant activity was evaluated by using a DPPH assay...
February 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28216285/a-novel-mechanism-of-diabetic-vascular-endothelial-dysfunction-hypoadiponectinemia-induced-nlrp3-inflammasome-activation
#2
Jinglong Zhang, Linying Xia, Fen Zhang, Di Zhu, Chao Xin, Helin Wang, Fuyang Zhang, Xian Guo, Yan Lee, Ling Zhang, Shan Wang, Xiong Guo, Chong Huang, Feng Gao, Yi Liu, Ling Tao
It has been well documented that hypoadiponectinemia is associated with impaired endothelium-dependent vasodilation. However, the exact molecular mechanism which mediates this process has not been fully described. The current study aimed to investigate the role of hypoadiponectinemia-induced NLRP3 inflammasome activation in diabetic vascular endothelial dysfunction and its molecular mechanism. Male adult adiponectin knockout mice and wild type mice were fed with a high fat diet to establish a type 2 diabetic mellitus model...
February 12, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28215799/comprehensive-understanding-of-pm2-5-on-gene-and-microrna-expression-patterns-in-zebrafish-danio-rerio-model
#3
Junchao Duan, Yang Yu, Yang Li, Li Jing, Man Yang, Ji Wang, Yanbo Li, Xianqing Zhou, Mark R Miller, Zhiwei Sun
PM2.5 is a major public health concern and some severe diseases have been attributed to exposure to PM2.5. However, a comprehensive understanding of gene and microRNA expression patterns induced by PM2.5 is missing. The objective of this study was to evaluate the toxicity of PM2.5 via genome-wide transcriptional analysis in the model teleost fish, zebrafish (Danio rerio). Gene ontology analysis revealed that the most impact gene functional categories induced by PM2.5 included oxidation-reduction process, transport, response to xenobiotic stimulus, response to chemical stimulus and metabolic process...
February 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28207427/progression-and-characterization-of-the-accelerated-atherosclerosis-in-iliac-artery-of-new-zealand-white-rabbits-effect-of-simvastatin
#4
Jitendra S Kanshana, Vivek Khanna, Vishal Singh, Manish Jain, Ankita Misra, Sachin Kumar, Mariya Farooqui, Manoj K Barthwal, Madhu Dikshit
OBJECTIVE: Although atherosclerosis is described in New Zealand White rabbit's iliac artery, yet details of time-dependent atherosclerosis progression are not well known. Further, a well characterized accelerated model of atherosclerosis is also required for the screening of candidate drugs to target specific steps of atherosclerosis development. The present study extensively characterizes the time-dependent plaque composition and functional responses of the atherosclerosis in rabbit iliac artery and its modification by simvastatin...
February 14, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28202440/exposure-to-placental-ischemia-impairs-postpartum-maternal-renal-and-cardiac-function-in-rats
#5
Nina D Paauw, Jaap A Joles, Frank T Spradley, Bhavisha Bakrania, Zsuzsanna K Zellenger, Arie Franx, Marianne C Verhaar, Joey P Granger, A Titia Lely
INTRODUCTION: Women with a history of preeclampsia (PE) have an increased risk to develop cardiovascular and renal diseases later in life, but the mechanisms underlying this effect are unknown. In rats, we assessed whether placental ischemia results in long-term effects on the maternal cardiovascular and renal systems using the Reduced Uterine Perfusion Pressure (RUPP) model for PE. METHODS: Sprague-Dawley rats received either a SHAM or RUPP operation at gestational day 14...
February 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28194438/a-role-for-muscarinic-receptors-in-neutrophil-extracellular-trap-formation-and-levamisole-induced-autoimmunity
#6
Carmelo Carmona-Rivera, Monica M Purmalek, Erica Moore, Meryl Waldman, Peter J Walter, H Martin Garraffo, Karran A Phillips, Kenzie L Preston, Jonathan Graf, Mariana J Kaplan, Peter C Grayson
Levamisole, an anthelmintic drug with cholinergic properties, has been implicated in cases of drug-induced vasculitis when added to cocaine for profit purposes. Neutrophil extracellular trap (NET) formation is a cell death mechanism characterized by extrusion of chromatin decorated with granule proteins. Aberrant NET formation and degradation have been implicated in idiopathic autoimmune diseases that share features with levamisole-induced autoimmunity as well as in drug-induced autoimmunity. This study's objective was to determine how levamisole modulates neutrophil biology and its putative effects on the vasculature...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28192231/hypotensive-and-vasorelaxant-effect-of-diapocynin-in-normotensive-rats
#7
Simone R Potje, Jéssica A Troiano, Murilo E Graton, Valdecir F Ximenes, Ana Claúdia M S Nakamune, Cristina Antoniali
Nicotinamide adenine dinucleotide phosphate oxidase (NAD(P)H-oxidase) is a multicomponent enzyme system that generates superoxide anion by one-electron reduction of molecular oxygen and represents the major source of reactive oxygen species (ROS) in the vascular cells. Apocynin has been extensively used as an inhibitor of NADPH oxidase (NOX) in phagocytic cells and as an antioxidant in non-phagocytic cells. In phagocytes cells, due to the presence of myeloperoxidase, apocynin can be the converted to diapocynin, which is supposed to be the active form of this phytochemical...
February 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28192151/angiotensin-1-7-dependent-vasorelaxation-of-the-renal-artery-exhibits-unique-angiotensin-and-bradykinin-receptor-selectivity
#8
Mariam H M Yousif, Ibrahim F Benter, Debra I Diz, Mark C Chappell
Angiotensin-(1-7) [Ang-(1-7)] exhibits blood pressure lowering actions, inhibits cell growth, and reduces tissue inflammation and fibrosis which may functionally antagonize an activated Ang II-AT1 receptor axis. Since the vascular actions of Ang-(1-7) and the associated receptor/signaling pathways varies in different vascular beds, the current study established the vasorelaxant properties of the heptapeptide in the renal artery of male Wistar male rats. Ang-(1-7) produced an endothelium-dependent vasodilator relaxation of isolated renal artery segments pre-contracted by a sub-maximal concentration of phenylephrine (PE) (10(-7)M)...
February 9, 2017: Peptides
https://www.readbyqxmd.com/read/28188215/cystathionine-gamma-lyase-protects-vascular-endothelium-a-role-for-inhibition-of-histone-deacetylase-6
#9
Thorsten Martin Leucker, Yohei Nomura, Jae Hyung Kim, Anil Bhatta, Victor Wang, Andrea Wecker, Sandeep S Jandu, Lakshmi Santhanam, Dan E Berkowitz, Lewis Romer, Deepesh Pandey
Endothelial cystathionine -lyase (CSE) contributes to cardiovascular homeostasis, mainly through production of hydrogen sulfide. However, the molecular mechanisms that control CSE gene expression in endothelium during cardiovascular diseases are unclear. The aim of the current study is to determine the role of specific histone deacetylases (HDAC) in the regulation of endothelial CSE. Reduced CSE mRNA expression and protein abundance were observed in human aortic endothelial cells (HAEC) exposed to OxLDL and in aortas from atherogenic ApoE-/- mice fed a high-fat diet as compared with controls...
February 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28181559/sirtuin1-protects-endothelial-caveolin-1-expression-and-preserves-endothelial-function-via-suppressing-mir-204-and-endoplasmic-reticulum-stress
#10
M Kassan, A Vikram, Y R Kim, Q Li, A Kassan, H H Patel, S Kumar, M Gabani, J Liu, J S Jacobs, K Irani
Sirtuin1 (Sirt1) is a class III histone deacetylase that regulates a variety of physiological processes, including endothelial function. Caveolin1 (Cav1) is also an important determinant of endothelial function. We asked if Sirt1 governs endothelial Cav1 and endothelial function by regulating miR-204 expression and endoplasmic reticulum (ER) stress. Knockdown of Sirt1 in endothelial cells, and in vivo deletion of endothelial Sirt1, induced endothelial ER stress and miR-204 expression, reduced Cav1, and impaired endothelium-dependent vasorelaxation...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181315/emodin-a-natural-inhibitor-of-protein-kinase-ck2-suppresses-growth-hyphal-development-and-biofilm-formation-of-candida-albicans
#11
Monika Janeczko, Maciej Masłyk, Konrad Kubiński, Hieronim Golczyk
Emodin (1,3,8-trihydroxy-6-methyl-anthraquinone) is a natural secondary plant product, originally isolated from the rhizomes of Rheum palmatum. Many reports show its diuretic, vasorelaxant, anti-bacterial, anti-viral, anti-ulcerogenic, immunosuppressive, hepatoprotective, anti-inflammatory, and anti-cancer potential. Emodin is a pleiotropic molecule capable of interacting with several major molecular targets, e.g. NF-κB, AKT/mTOR, and STAT3. The compound can also act as an inhibitor of some protein kinases, with special affinity to protein kinase CK2...
February 8, 2017: Yeast
https://www.readbyqxmd.com/read/28167160/comparative-study-of-the-cytotoxicity-and-genotoxicity-of-kaurenoic-acid-and-its-semi-synthetic-derivatives-methoxy-kaurenoic-acid-and-kaurenol-in-cho-k1-cells
#12
Bruno Limonti Cano, Monique Rodrigues Moreira, Mirian Oliveira Goulart, Natália Dos Santos Gonçalves, Rodrigo Cassio Sola Veneziani, Jairo Kenupp Bastos, Sérgio Ricardo Ambrósio, Raquel Alves Dos Santos
The diterpene kaurenoic acid (KA) has vasorelaxant, antimicrobial, anti-tumoural and anti-leishmanial effects. Semi-synthetic derivatives were obtained to achieve more satisfactory responses. The assessment of genotoxicity is part of the toxicological evaluation of therapeutic compound candidates. The present study investigated the cytotoxicity and genotoxicity of KA and its semi-synthetic derivatives methoxy kaurenoic acid (MKA) and kaurenol (KRN) using the CHO-K1 cell line. The cytotoxicity evaluation demonstrated that treatments with 200 and 400 μM KA reduced cellular proliferation to 36...
February 3, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28161542/vasorelaxation-effect-of-glycyrrhizae-uralensis-through-the-endothelium-dependent-pathway
#13
Chu Shan Tan, Yung Sing Ch'ng, Yean Chun Loh, Mohd Zaini Asmawi, Mariam Ahmad, Mun Fei Yam
ETHNOPHARMACOLOGICAL RELEVANCE: Glycyrrhiza uralensis (G. uralensis) is one of the herbs used in traditional Chinese medicine (TCM) and serves as an envoy medicinal. Since G. uralensis plays a major role in the anti-hypertensive TCM formulae, we believe that G. uralensis might possess vasorelaxation activity. AIM OF THE STUDY: This study is designed to investigate the vasorelaxation effect of G. uralensis from various extracts and to study its pharmacology effect...
February 1, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28161078/erectile-dysfunction-in-heme-deficient-nitric-oxide-unresponsive-soluble-guanylate-cyclase-knock-in-mice
#14
Kelly Decaluwé, Bart Pauwels, Charlotte Boydens, Robrecht Thoonen, Emmanuel S Buys, Peter Brouckaert, Johan Van de Voorde
INTRODUCTION: The nitric oxide (NO), soluble guanylate cyclase (sGC), and cyclic guanosine monophosphate (cGMP) pathway is the leading pathway in penile erection. AIM: To assess erectile function in a mouse model in which sGC is deficient in heme (apo-sGC) and unresponsive to NO. METHODS: Mutant mice (sGCβ1(ki/ki)) that express an sGC enzyme that retains basal activity but fails to respond to NO because of heme deficiency (apo-sGC) were used...
February 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28160862/aged-garlic-extract-exerts-endothelium-dependent-vasorelaxant-effect-on-rat-aorta-by-increasing-nitric-oxide-production
#15
Miyuki Takashima, Yuta Kanamori, Yukihiro Kodera, Naoaki Morihara, Koichi Tamura
BACKGROUND: Clinical trials have shown that aged garlic extract (AGE) is effective in reducing blood pressure of hypertensive patients. However, the mechanisms involved remain to be elucidated. PURPOSE: The aim of the present study was to investigate the vasorelaxant effect of AGE on the aorta and its mechanism of action in order to clarify the blood pressure-lowering action of AGE. METHODS: The vasorelaxant effect was evaluated in isolated rat aortic rings...
January 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28160856/vasculoprotective-and-vasodilatation-effects-of-herbal-formula-sahatsatara-and-piperine-in-spontaneously-hypertensive-rats
#16
Suksalin Booranasubkajorn, Sukit Huabprasert, Jantanee Wattanarangsan, Pruksa Chotitham, Pinpilai Jutasompakorn, Tawee Laohapand, Pravit Akarasereenont, Pinpat Tripatara
BACKGROUND: The herbal formula (Sahatsatara, STF), the Thai traditional poly-herbal recipe, has been used for treatment of muscle pain, anti-flatulence and numbness on hands and feet, with the caution when used in hypertensive patients. However, there is no scientific evidence to prove its effects on cardiovascular system. Piperine is the proposed major active compound in STF. It is shown to have antihypertensive effect in the L-NAME-induced endothelial dysfunction rats. PURPOSE: This study investigated the pharmacokinetics, mechanism of action, as well as the hemodynamic and vasoactive effect and toxicity of STF and piperine using spontaneously hypertensive rats (SHR) and normal Wistar rats (NWR)...
January 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28159537/diethyl-4-4-dihydroxy-8-3-neolign-7-7-dien-9-9-dionate-exhibits-antihypertensive-activity-in-rats-through-increase-in-intracellular-cgmp-level-and-blockade-of-calcium-channels
#17
Arjun Singh, B Sathish Kumar, Sarfaraz Alam, Hina Iqbal, Mohammad Shafiq, Feroz Khan, Arvind S Negi, Kashif Hanif, Debabrata Chanda
We report here the antihypertensive and vasorelaxant potential of some steroidal and non-steroidal compounds identified through a library of compounds. All the novel analogues showed vasorelaxant potential in isolated rat aorta. The most potent lead neolignan1 (Diethyl-4,4'-dihydroxy-8,3'-neolign-7,7'-dien-9,9'-dionate) produced concentration dependent relaxation with [pD2 5.16 ± 0.05; n=16 and Emax 96.97% ± 1.12%; n=16]. The neolignan1 relaxation is independent of endothelium and is sensitive to ODQ (1H-[1, 2, 4] oxadiazolo [4, 3-a] quinoxalin-1-one; a blocker of soluble guanylyl cyclase (sGC) which synthesizes cGMP (cyclic guanosine monophosphate))...
January 31, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28152406/anacetrapib-but-not-evacetrapib-impairs-endothelial-function-in-cetp-transgenic-mice-in-spite-of-marked-hdl-c-increase
#18
Branko Simic, Pavani Mocharla, Margot Crucet, Elena Osto, Adelheid Kratzer, Simona Stivala, Susan Kühnast, Thimoteus Speer, Petia Doycheva, Hans M Princen, Jose W van der Hoorn, J Wouter Jukema, Hector Giral, Anne Tailleux, Ulf Landmesser, Bart Staels, Thomas F Lüscher
BACKGROUND AND AIMS: High-density lipoprotein cholesterol (HDL-C) is inversely related to cardiovascular risk. HDL-C raising ester transfer protein (CETP) inhibitors, are novel therapeutics. We studied the effects of CETP inhibitors anacetrapib and evacetrapib on triglycerides, cholesterol and lipoproteins, cholesterol efflux, paraoxonase activity (PON-1), reactive oxygen species (ROS), and endothelial function in E3L and E3L.CETP mice. METHODS: Triglycerides and cholesterol were measured at weeks 5, 14 and 21 in E3L...
January 16, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28144257/treatment-of-denture-related-stomatitis-improves-endothelial-function-assessed-by-flow-mediated-vascular-dilation
#19
Grzegorz Osmenda, Joanna Maciąg, Grzegorz Wilk, Anna Maciąg, Daniel Nowakowski, Jolanta Loster, Elżbieta Dembowska, Douglas Robertson, Tomasz Guzik, Marta Cześnikiewicz-Guzik
INTRODUCTION: The presence of oral inflammation has recently been linked with the pathogenesis of cardiovascular diseases. While numerous studies have described links between periodontitis and endothelial dysfunction, little is known about the influence of denture-related stomatitis (DRS) on cardiovascular risk. Therefore, the aim of this study was to determine whether the treatment of DRS can lead to improvement of the clinical measures of vascular dysfunction. MATERIAL AND METHODS: The DRS patients were treated with a local oral antifungal agent for 3 weeks...
February 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28143473/chemical-composition-vasorelaxant-antioxidant-and-antiplatelet-effects-of-essential-oil-of-artemisia-campestris-l-from-oriental-morocco
#20
Ikram Dib, Marie-Laure Fauconnier, Marianne Sindic, Fatima Belmekki, Asmae Assaidi, Mohamed Berrabah, Hassane Mekhfi, Mohammed Aziz, Abdelkhaleq Legssyer, Mohamed Bnouham, Abderrahim Ziyyat
BACKGROUND: Artemisia campestris L. (Asteraceae) is a medicinal herb traditionally used to treat hypertension and many other diseases. Hence, this study is aimed to analyze the essential oil of A. campestris L (AcEO) and to investigate the antiplatelet, antioxidant effects and the mechanisms of its vasorelaxant effect. METHODS: The chemical composition of AcEO was elucidated using GC/MS analysis. Then, the antioxidant effect was tested on DPPH radical scavenging and on the prevention of β-carotene bleaching...
January 31, 2017: BMC Complementary and Alternative Medicine
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