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https://www.readbyqxmd.com/read/28726716/new-insights-into-the-role-of-matrix-metalloproteinases-in-preeclampsia
#1
REVIEW
Salvador Espino Y Sosa, Arturo Flores-Pliego, Aurora Espejel-Nuñez, Diana Medina-Bastidas, Felipe Vadillo-Ortega, Veronica Zaga-Clavellina, Guadalupe Estrada-Gutierrez
Preeclampsia is a severe pregnancy complication globally, characterized by poor placentation triggering vascular dysfunction. Matrix metalloproteinases (MMPs) exhibit proteolytic activity implicated in the efficiency of trophoblast invasion to the uterine wall, and a dysregulation of these enzymes has been linked to preeclampsia. A decrease in MMP-2 and MMP-9 interferes with the normal remodeling of spiral arteries at early pregnancy stages, leading to the initial pathophysiological changes observed in preeclampsia...
July 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28726518/differential-responses-of-mesenteric-arterial-bed-to-vasoactive-substances-in-l-name-induced-preeclampsia-role-of-oxidative-stress-and-endothelial-dysfunction
#2
Taline A S Amaral, Dayane T Ognibene, Lenize C R M Carvalho, Ana Paula M Rocha, Cristiane A Costa, Roberto S Moura, Angela C Resende
To investigate the systemic and placental oxidant status as well as vascular function in experimental preeclampsia (PE) induced by nitro-L-arginine methyl ester (L-NAME). Fetal parameters and maternal blood pressure, proteinuria, mesenteric arterial bed (MAB) reactivity, and systemic and placental oxidative stress were compared between four groups: pregnant rats receiving L-NAME (60 mg/kg/day, orally) (P + L-NAME) or vehicle (P) from days 13 to 20 of pregnancy and nonpregnant rats receiving L-NAME (NP + L-NAME) or vehicle (NP) during 7 days...
July 20, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28726232/-frequent-episodic-migraine-and-calcitonin-gene-related-peptide-influence-of-treatment-with-topiramate-and-zonisamide-on-levels-of-the-peptide
#3
D A Garcia-Estevez, M Pardo-Parrado, S Silvarrey-Rodriguez
INTRODUCTION: The pathophysiology of pain in migraine is related to the activation of the trigeminovascular system by releasing vasoactive neuropeptides, the most important of which is calcitonin gene-related peptide (CGRP), which causes a neurogenic inflammation in the leptomeningeal vessels. AIM: To study whether CGRP is increased in frequent episodic migraine and whether preventive treatment with topiramate or zonisamide modifies its levels. SUBJECTS AND METHODS: We studied 28 patients with episodic migraine with or without aura, in accordance with the International Headache Society criteria, with a frequency of 4-14 days/month...
August 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28720396/pituitary-adenylate-cyclase-activating-polypeptide-pacap-protects-against-mitoxantrone-induced-cardiac-injury-in-mice
#4
Venkat Subramaniam, Gin Chuang, Huijing Xia, Brendan Burn, Jessica Bradley, Jerome L Maderdrut, David H Coy, Kurt J Varner
Mitoxantrone (MXT) is an androstenedione that is used to treat cancers and progressive forms of multiple sclerosis; however, its use is limited by its cardiotoxicity. Pituitary adenylate cyclase activating polypeptide (PACAP) is a member of the secretin/growth hormone-releasing hormone/vasoactive intestinal peptide family and has many functions, including cytoprotection and immunosuppression. We tested the hypothesis that PACAP can protect against MXT-induced cardiotoxicity in mice. Female BALB/c mice were treated once weekly for 4 weeks with saline (n=14) or MXT (3mg/kg, i...
July 15, 2017: Peptides
https://www.readbyqxmd.com/read/28720331/a-novel-antihypertension-agent-sargachromenol-d-from-marine-brown-algae-sargassum-siliquastrum-exerts-dual-action-as-an-l-type-ca-2-channel-blocker-and-endothelin-a-b2-receptor-antagonist
#5
Byong-Gon Park, Woon-Seob Shin, Sangtae Oh, Gab-Man Park, Nam Ik Kim, Seokjoon Lee
We isolated the novel vasoactive marine natural products, (5E,10E)-14-hydroxy-2,6,10-trimethylpentadeca-5,10-dien-4-one (4) and sargachromenol D (5), from Sargassum siliquastrum collected from the coast of the East Sea in South Korea by using activity-guided HPLC purification. The compounds effectively dilated depolarization (50mMK(+))-induced basilar artery contraction with EC50 values of 3.52±0.42 and 1.62±0.63μM, respectively, but only sargachromenol D (5) showed a vasodilatory effect on endothelin-1 (ET-1)-induced basilar artery contraction (EC50=9...
July 6, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28718228/early-initiation-of-beta-blockers-following-primary-endoscopic-therapy-for-bleeding-oesophageal-varices-in-cirrhotics
#6
Adnan Salim, Kashif Malik, Muhammad Omer Farooq, Umair Butt, Arshad Kamal Butt, Altaf Alam
BACKGROUND AND AIMS: Beta-blockers provide secondary prophylaxis following endoscopic therapy for variceal bleeding. Guidelines recommend starting beta-blockers 6 days after endoscopy to prevent masking hemodynamic signs of re-bleeding. We aimed to see safety of earlier initiation of betablockers. METHODS: Cirrhotic patients with upper GI bleed were given intravenous vasoactive agents until undergoing endoscopy. Patients with only oesophageal varices as source of bleed were recruited...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28711627/vasoactive-intestinal-polypeptide-and-mast-cells-regulate-increased-passage-of-colonic-bacteria-in-patients-with-irritable-bowel-syndrome
#7
Olga Bednarska, Susanna A Walter, Maite Casado-Bedmar, Magnus Ström, Eloísa Salvo-Romero, Maria Vicario, Emeran A Mayer, Åsa V Keita
BACKGROUND & AIMS: Irritable bowel syndrome (IBS) is associated with intestinal dysbiosis and symptoms of IBS develop following gastroenteritis. We aimed to study passage of live bacteria through the colonic epithelium, and determine the role of mast cells and vasoactive intestinal polypeptide (VIP) in barrier regulation in IBS and healthy individuals. METHODS: Colon biopsies from 32 women with IBS and 15 age-matched healthy women (controls) were mounted in Ussing chambers; we measured numbers of fluorescently labeled Escherichia coli HS and Salmonella typhimurium that passed through from the mucosal side to the serosal side of the tissue...
July 12, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28710184/diagnostic-value-of-four-dimensional-ct-angiography-in-arterial-erectile-dysfunction-using-320-detector-row-dynamic-volume-ct
#8
Cheng-Cheng Xu, Xin-Zhong Ruan, Yi-Fan Tang, Jiao-Hai Pan, Guo-Yao Wang, Qiu-Li Huang
The study aims to evaluate the diagnostic value of four-dimensional CT angiography (4D-CTA) in the diagnosis of arterial erectile dysfunction (ED) using 320-detector row dynamic volume CT. Arterial ED patients attributed to arterial insufficiency were enrolled. To induce penile erection, an intracavernous injection of corpus cavernosum with a vasoactive drug was administered. Patients were assigned into the erection hardness score (EHS) 1/2 group or EHS 3/4 group. Color duplex Doppler ultrasound (CDDU) was used to analyze blood flow spectrum...
July 14, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28709443/severity-of-acute-gastrointestinal-injury-grade-is-a-predictor-of-all-cause-mortality-in-critically-ill-patients-a-multicenter-prospective-observational-study
#9
Bangchuan Hu, Renhua Sun, Aiping Wu, Yin Ni, Jingquan Liu, Feng Guo, Lijun Ying, Guoping Ge, Aijun Ding, Yunchao Shi, Changwen Liu, Lei Xu, Ronglin Jiang, Jun Lu, Ronghai Lin, Yannan Zhu, Weidong Wu, Bo Xie
BACKGROUND: In 2012, the European Society of Intensive Care Medicine proposed a definition for acute gastrointestinal injury (AGI) based on current medical evidence and expert opinion. The aim of the present study was to evaluate the feasibility of using the current AGI grading system and to investigate the association between AGI severity grades with clinical outcome in critically ill patients. METHODS: Adult patients at 14 general intensive care units (ICUs) with an expected ICU stay ≥24 h were prospectively studied...
July 14, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28707585/migraine-neurogenic-inflammation-drug-development-pharmacochemical-aspects
#10
Melinda Lukács, János Tajti, Ferenc Fülöp, József Toldi, Lars Edvinsson, László Vécsei
BACKGROUND: Migraine is a primary headache disorder. Despite numerous studies conducted with the aim to understand the pathophysiology of migraine, several aspects are still unclear. The trigeminovascular system plays a key role. Neurogenic inflammation is presumed to be an important factor in migraine pathophysiology, mediated by the activation of primary neurons, leading to the release of various pro-inflammatory neuropeptides and neurotransmitters such as Calcitonin Gene-Related Peptide (CGRP), substance P (SP), and vasoactive intestinal peptide (VIP)...
July 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28703351/a-comparative-study-between-responses-of-isolated-bovine-and-equine-digital-arteries-to-vasoactive-mediators
#11
C Zizzadoro, M Caruso, S Punzi, G Crescenzo, F Zongoli, C Belloli
Hemodynamic perturbations, partly resulting from abnormal vasoconstriction of digital vessels, have been implicated in the pathogenesis of bovine and equine laminitis. This study compared the responsiveness of isolated bovine (BDA) and equine (EDA) digital arteries to pharmacological agents that stimulate receptor systems involved in the regulation of normal vessel tone. The role of the endothelium and the short- and longer-term effects of an experimentally induced endothelial damage were also evaluated. Species-related differences were found in the vessel reactivity to all of the receptor agonists tested...
July 13, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28702263/factors-associated-with-the-incidence-and-severity-of-new-onset-atrial-fibrillation-in-adult-critically-ill-patients
#12
Péricles A D Duarte, Gustavo Elias Leichtweis, Luiza Andriolo, Yasmim A Delevatti, Amaury C Jorge, Andreia C Fumagalli, Luiz Claudio Santos, Cecilia K Miura, Sergio K Saito
BACKGROUND: Acute Atrial Fibrillation (AF) is common in critically ill patients, with significant morbidity and mortality; however, its incidence and severity in Intensive Care Units (ICUs) from low-income countries are poorly studied. Additionally, impact of vasoactive drugs on its incidence and severity is still not understood. This study aimed to assess epidemiology and risk factors for acute new-onset AF in critically ill adult patients and the role of vasoactive drugs. METHOD: Cohort performed in seven general ICUs (including cardiac surgery) in three cities in Paraná State (southern Brazil) for 45 days...
2017: Critical Care Research and Practice
https://www.readbyqxmd.com/read/28695319/acute-impact-of-selected-pyridoindole-derivatives-on-fos-expression-in-different-structures-of-the-rat-brain
#13
Romana Koprdova, Jana Osacka, Mojmir Mach, Alexander Kiss
The impacts of three pyridoindole derivatives (PDs), designated as PD144, PD143, and PD104, which have previously been shown to have antidepressant (PD144) and anxiolytic (PD143, PD104) properties, were investigated on the Fos expressions in 11 different rat brain areas, including the medial prefrontal cortex, striatum, septum, accumbens nucleus (shell, core), bed nucleus of the stria terminalis, hypothalamic paraventricular nucleus, central amygdala, locus coeruleus, dorsal raphe nucleus, and the solitary tract nucleus...
July 10, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28692439/lipid-emulsion-in-local-anesthetic-toxicity
#14
Martyn Harvey, Grant Cave
PURPOSE OF REVIEW: Enthusiasm for regional anesthesia has been driven by multimodal benefits to patient outcomes. Despite widespread awareness and improved techniques (including the increasing use of ultrasound guidance for block placement), intravascular sequestration and the attendant risk of local anesthetic systemic toxicity (LAST) remains. Intravenous lipid emulsion (ILE) for the treatment of LAST has been endorsed by anesthetic regulatory societies on the basis of animal study and human case report data...
July 7, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28692337/a-multidisciplinary-perioperative-strategy-for-attaining-more-physiologic-cardiac-surgery
#15
Kyriakos Anastasiadis, Polychronis Antonitsis, Apostolos Deliopoulos, Helena Argiriadou
BACKGROUND: Cardiac surgery is, by definition, a "non-physiologic" intervention associated with systemic adverse effects. Despite advances in surgical technique, cardiopulmonary bypass (CPB) technology as well as anaesthesia management and patient care, there is still significant morbidity and subsequent mortality. AIM: We consider that the contemporary demand for further improving patient outcome mandates the upgrade from optimal perfusion during the procedure as the gold standard to the concept of a "more physiologic" cardiac surgery...
March 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28692114/association-of-endothelin-1-gene-polymorphisms-with-essential-hypertension-in-a-chinese-population
#16
Z Fang, M Li, Z Ma, G Tu
Endothelin-1 (ET-1) is the most potent endogenous vasoconstrictor and is involved in several vascular disorders such as hypertension. Its strong interaction with other vasoactive hormone systems suggests that the ET-1 gene (EDN1) is a potential candidate molecule that influences the risk of developing hypertension. Recently, two single nucleotide polymorphisms in EDN1 have been reported to be associated with hypertension: Lys198Asn and 3A/4A (-134delA) located in the 5'-untranslated region. To determine the association of these two polymorphisms with hypertension, we genotyped patients and controls (N = 537) and compared the allele and genotype frequencies between groups...
July 6, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28690013/peptides-derived-from-plasma-proteins-released-by-bothropasin-a-metalloprotease-present-in-the-bothrops-jararaca-venom
#17
Cristiane Castilho Fernandes da Silva, Milene Cristina Menezes, Miryam Palomino, Ana Karina Oliveira, Leo Kei Iwai, Marcella Faria, Fernanda Vieira Portaro
Viperid snake venoms contain proteases that affect hemostasis by degrading important proteins such as those that participate in the coagulation cascade. The Bothrops jararaca venom presents as its main components metallo and serine proteases, which comprise around 65% of the venom composition. Bothropasin is a hemorrhagic metalloprotease from the B. jararaca venom which causes disruption of the basement membrane of the vascular endothelium, resulting in bleeding. Although the bothropasin ability to degrade plasmatic and extracellular matrix proteins in vitro has been described, the primary sequence of the released peptides is unknown...
July 6, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28689770/vip-induces-the-decidualization-program-and-conditions-the-immunoregulation-of-the-implantation-process
#18
Esteban Grasso, Soledad Gori, Daniel Paparini, Elizabeth Soczewski, Laura Fernández, Lucila Gallino, Gabriela Salamone, Gustavo Martinez, Marcela Irigoyen, Claudio Ruhlmann, Claudia Pérez Leirós, Rosanna Ramhorst
The decidualization process involves phenotype and functional changes on endometrial cells and the modulation of mediators with immunoregulatory properties as the vasoactive intestinal peptide (VIP). We investigate VIP contribution to the decidualization program and to immunoregulation throughout the human embryo implantation process. The decidualization of Human endometrial stromal cell line (HESC) with Medroxyprogesterone-dibutyryl-cAMP increased VIP/VPAC-receptors system. In fact, VIP could induce decidualization increasing differentiation markers (IGFBP1, PRL, KLF13/KLF9 ratio, CXCL12, CXCL8 and CCL2) and allowing Blastocyst-like spheroids (BLS) invasion in an in vitro model of embryo implantation...
July 6, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28689178/sacubitril-valsartan-beyond-natriuretic-peptides
#19
REVIEW
Jagdeep S S Singh, Louise M Burrell, Myriam Cherif, Iain B Squire, Andrew L Clark, Chim C Lang
Natriuretic peptides, especially B-type natriuretic peptide (BNP), have primarily been regarded as biomarkers in heart failure (HF). However, they are also possible therapeutic agents due to their potentially beneficial physiological effects. The angiotensin receptor-neprilysin inhibitor, sacubitril/valsartan, simultaneously augments the natriuretic peptide system (NPS) by inhibiting the enzyme neprilysin (NEP) and inhibits the renin-angiotensin-aldosterone system (RAAS) by blocking the angiotensin II receptor...
July 8, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28688059/a-case-of-severe-refractory-hypotension-after-amlodipine-overdose
#20
Melissa Chudow, Kevin Ferguson
Calcium channel blockers (CCBs) are responsible for a substantial portion of the mortality associated with cardiovascular medication overdose cases. Amlodipine, a dihydropyridine CCB, can cause prolonged hypotension in overdose. This report describes a severe amlodipine overdose case that was refractory to multiple therapeutic approaches. A 53-year-old male presented after ingesting eighty 10 mg amlodipine tablets in a suicide attempt. The patient was initially managed with calcium boluses, glucagon, multiple vasoactive agents, lipid emulsion infusions and hyperinsulinemic euglycemic therapy...
July 7, 2017: Cardiovascular Toxicology
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