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Vascular dysfunction

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https://www.readbyqxmd.com/read/29150694/inhibition-of-intimal-hyperplasia-in-murine-aortic-allografts-by-administration-of-a-small-molecule-tlr4-inhibitor-tak-242
#1
Chuangyan Wu, Xiangchao Ding, Cheng Zhou, Ping Ye, Yuan Sun, Jie Wu, Anchen Zhang, Xiaofan Huang, Lingyun Ren, Ke Wang, Peng Deng, Zhang Yue, Jiuling Chen, Sihua Wang, Jiahong Xia
Graft arteriosclerosis (GA) is the leading cause of late cardiac allograft dysfunction. The innate immune system plays a major role in GA, paprticularly Toll-like receptor 4 (TLR4) signaling. Here we characterized the role of TLR4 and its antagonist TAK-242 in a mouse model of GA. BALB/c (H-2d) donor aortas were transplanted into C57BL/6 (H-2b) recipients, and the mice received intraperitoneal injection of 3 or 10 mg/kg of TAK-242 or vehicle every other day for 1, 2, 4, 6, 8 and 12 weeks. With TAK-242 administration, intimal hyperplasia initially appeared at 2 weeks after transplantation, and TAK-242 postponed the progression of neointimal formation in allogeneic aortic grafts...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150293/a-unique-and-promising-combination-of-medications-for-the-treatment-of-alzheimer-s-disease
#2
James D Weinstein
At present there is no therapy for Alzheimer's Disease which completely stops the progressive dementia effecting late onset Alzheimer's Disease (AD) patients. It is felt that the main reason for this failure is that AD appears to be a disease caused by four major pathological processes. To date, efforts to develop treatments have addressed only one or another of these four etiologies. However, even a partially effective therapy against one cause allows the others, untreated, to continue their inexorable destruction of the neurons of the brain...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150126/hypertrophic-cardiomyopathy
#3
REVIEW
Juan José Santos Mateo, María Sabater Molina, Juan Ramón Gimeno Blanes
Hypertrophic cardiomyopathy is the most common inherited cardiovascular disease. It is characterized by increased ventricular wall thickness and is highly complex due to its heterogeneous clinical presentation, several phenotypes, large number of associated causal mutations and broad spectrum of complications. It is caused by mutations in sarcomeric proteins, which are identified in up to 60% of cases of the disease. Clinical manifestations of Hypertrophic Cardiomyopathy include shortness of breath, chest pain, palpitations and syncope, which are related to the onset of diastolic dysfunction, left ventricular outflow tract obstruction, ischemia, atrial fibrillation and abnormal vascular responses...
November 14, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/29149941/pathophysiology-of-septic-shock
#4
REVIEW
James A Russell, Barret Rush, John Boyd
Fundamental features of septic shock are vasodilation, increased permeability, hypovolemia, and ventricular dysfunction. Vasodilation owing to increased nitric oxide and prostaglandins is treated with vasopressors (norepinephrine first). Increased permeability relates to several pathways (Slit/Robo4, vascular endothelial growth factor, angiopoietin 1 and 2/Tie2 pathway, sphingosine-1-phosphate, and heparin-binding protein), some of which are targets for therapies. Hypovolemia is common and crystalloid is recommended for fluid resuscitation...
January 2018: Critical Care Clinics
https://www.readbyqxmd.com/read/29149817/high-density-lipoprotein-hdl-dysfunction-and-future-of-hdl
#5
Sibel Ertek
Although high density lipoprotein cholesterol (HDL-C) levels are inversely proportional to cardiovascular risk in many studies, recent pharmacological interventional studies with HDL-C raising strategies did not show a benefit in terms of vascular events. The HDL particle is heterogenous with anti-atherogenic functions and non-vascular effects. Many factors affect HDL components and may either cause compositional changes, post-translational modifications of proteins, or alter lipids and other cargo molecules; generally these factors cause more than one of these changes, resulting in functional differences...
November 16, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/29149816/maternal-dyslipidaemia-in-pregnancy-with-gestational-diabetes-mellitus-possible-impact-in-the-foetoplacental-vascular-function-and-the-lipoprotein-in-the-neonatal-circulation
#6
Susana Contreras-Duarte, Lorena Carvajal, Barbara Fuenzalida, Claudette Cantin, Luis Sobrevia, Andrea Leiva
Dyslipidaemia occurs in pregnancy to secure foetal development. The mother shows a physiological increase in plasma total cholesterol and triglycerides (TG) as pregnancy progresses (i.e. maternal physiological dyslipidaemia in pregnancy). However, in some women pregnancy-associated dyslipidaemia exceeds this physiological adaptation. The consequences of this condition on the developing foetus include endothelial dysfunction of the foetoplacental vasculature and development of foetal aortic atherosclerosis. Gestational diabetes mellitus (GDM) associates with abnormal function of the foetoplacental vasculature due to foetal hyperglycaemia and hyperinsulinaemia, and associates with development of cardiovascular disease in adulthood...
November 16, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/29148852/sildenafil-citrate-improves-the-delivery-and-anticancer-activity-of-doxorubicin-formulations-in-a-mouse-model-of-breast-cancer
#7
Khaled Greish, Maryam Fateel, Sara Abdelghany, Nanitha Rachel, Houman Alimoradi, Moiz Bakhiet, Ahmed Alsaie
Sildenafil is an approved drug for the treatment of erectile dysfunction. The drug exerts its action through the relaxation of smooth muscles and the modulation of vascular endothelial permeability. In this work, we tested whether the aforementioned effects of Sildenafil on tumor vasculatures could result in an improvement of anticancer drug concentration in tumor tissues, and hence improve its anticancer effect. Sildenafil when added to doxorubicin showed synergistic anticancer activity against 4T1 breast cancer cells in vitro...
November 17, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/29148423/non-invasive-vascular-biomarkers-in-patients-with-beh%C3%A3-et-s-disease-review-of-the-data-and-future-perspectives
#8
REVIEW
Athanase D Protogerou, Efthimia G Nasothimiou, Petros P Sfikakis, Athanasios G Tzioufas
Vascular inflammation in small to large veins and arteries contributes substantially to mortality above that of the general population in Behçet's disease. Recent data verified also the presence of accelerated classical subclinical arterial damage (atheromatosis, arteriosclerosis, arterial hypertrophy) even in patients free of overt vascular complications, and may be complementary to that of vasculitis. Early detection of such vascular damage might provide helpful pathophysiological insight and potentially even guide treatment management...
October 6, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29148253/quantification-of-vascular-damage-in-acute-kidney-injury-with-fluorine-magnetic-resonance-imaging-and-spectroscopy
#9
Jeremy K Moore, Junjie Chen, Hua Pan, Joseph P Gaut, Sanjay Jain, Samuel A Wickline
PURPOSE: To design a fluorine MRI/MR spectroscopy approach to quantify renal vascular damage after ischemia-reperfusion injury, and the therapeutic response to antithrombin nanoparticles (NPs) to protect kidney function. METHODS: A total of 53 rats underwent 45 min of bilateral renal artery occlusion and were treated at reperfusion with either plain perfluorocarbon NPs or NPs functionalized with a direct thrombin inhibitor (PPACK:phenyalanine-proline-arginine-chloromethylketone)...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29147666/sympathetic-denervation-accelerates-wound-contraction-but-inhibits-reepithelialization-and-pericyte-proliferation-in-diabetic-mice
#10
Zhifang Zheng, Yu Wan, Yishu Liu, Yu Yang, Jianbing Tang, Wenhua Huang, Biao Cheng
Previous studies focused on the effects of sympathetic denervation with 6-hydroxydopamine (6-OHDA) on nondiabetic wounds, but the effects of 6-OHDA on diabetic wounds have not been previously reported. In this study, treated mice received intraperitoneal 6-OHDA, and control mice received intraperitoneal injections of normal saline. Full-thickness wounds were established on the backs of mice. The wounds were sectioned (four mice per group) for analysis at 2, 5, 7, 10, 14, 17, and 21 days after injury. The wound areas in the control group were larger than those in the treatment group...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29147434/acute-radiation-induced-changes-in-sprague-dawley-rat-submandibular-glands-a-histomorphometric-analysis
#11
Manu Krishnan, Aatish Tennavan, Seema Saraswathy, Tarun Sekhri, Ajay Kumar Singh, Velu Nair
Background: Radiation-induced xerostomia is a distressing clinical condition that starts appearing from the initial stages of radiotherapy in head and neck cancer patients. Though submandibular glands contribute to maximum of the "resting salivary" secretions, most of the acute xerostomia experiments so far reported have been on animal parotid glands. Therefore, we assessed and quantified the histologic changes in submandibular glands of Sprague-Dawley (SD) rats using histomorphometry, 24 hours after radiation...
April 2017: World Journal of Oncology
https://www.readbyqxmd.com/read/29147131/transcriptional-activity-of-tumor-necrosis-factor-alpha-gene-in-peripheral-blood-mononuclear-cells-in-patients-with-coronary-slow-flow
#12
Yousef Rasmi, Morteza Bagheri, Sanaz Faramarz-Gaznagh, Mohadeseh Nemati, Mohammad Hasan Khadem-Ansari, Ehsan Saboory, Mir Hossein Seyed-Mohamadzad, Alireza Shirpoor
BACKGROUND: Coronary slow flow (CSF), an angiographic phenomenon that is characterized by a delayed coronary blood flow in the absence of obstructive coronary artery stenosis, is known as a disorder of the coronary microcirculation. Inflammation has an important role in the vascular hemostasis and endothelial dysfunction especially regarding monocyte adhesion and infiltration. Pro-inflammatory cytokines released by inflammatory cells result in endothelial cell dysfunction and cardiovascular diseases...
July 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29146864/acute-hypoxia-reoxygenation-and-vascular-oxygen-sensing-in-the-chicken-embryo
#13
Riazuddin Mohammed, Carlos E Salinas, Dino A Giussani, Carlos E Blanco, Angel L Cogolludo, Eduardo Villamor
Fetal/perinatal hypoxia is one of the most common causes of perinatal morbidity and mortality and is frequently accompannied by vascular dysfunction. However, the mechanisms involved have not been fully delineated. We hypothesized that exposure to acute hypoxia-reoxygenation induces alterations in vascular O2 sensing/signaling as well as in endothelial function in the chicken embryo pulmonary artery (PA), mesenteric artery (MA), femoral artery (FA), and ductus arteriosus (DA). Noninternally pipped 19-day embryos were exposed to 10% O2 for 30 min followed by reoxygenation with 21% O2 or 80% O2 Another group was constantly maintained at 21% O2 or at 21% O2 for 30 min and then exposed to 80% O2 Following treatment, responses of isolated blood vessels to hypoxia as well as endothelium-dependent (acetylcholine) and -independent (sodium nitroprusside and forskolin) relaxation were investigated in a wire myograph...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29145183/catastrophe-reaction-and-emotionalism
#14
Antonio Carota, Julien Bogousslavsky
The catastrophic reaction (CR; a disruptive and uncontrolled behavior triggered by anger, irritability, and hostility) and emotionalism (a condition of uncontrolled crying or laughing) are disorders of the emotional regulation and expression, the prevalence of which is underestimated in neurology. Their occurrence is an additional factor of poor outcome for neurologic patients. Although they have been recognized and completely described in their clinical manifestations more than a century ago, many issues remain unsolved regarding their pathogenesis and the respective role of the brain damage and psychological factors...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29144802/lipid-accumulation-product-visceral-adiposity-index-and-chinese-visceral-adiposity-index-as-markers-of-cardiometabolic-risk-in-adult-growth-hormone-deficiency-patients-a-cross-sectional-study
#15
Xin Xie, Qing Li, Lingmin Zhang, Wei Ren
OBJECTIVE: Adult growth hormone deficiency (AGHD) is associated with cardiometabolic risk factors. Given that cardiovascular disease (CVD) is an important cause of morbidity and mortality in the AGHD population, there is a need for alternative, non-invasive methods of assessing cardiometabolic risk in this population. Chinese visceral adiposity index (CVAI) is a new marker of visceral fat dysfunction that is based on age, body mass index (BMI), waist circumference (WC) and metabolic parameters...
November 16, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29143384/enhanced-ventricular-arterial-coupling-during-a-2-year-physical-activity-program-in-patients-with-rheumatoid-arthritis
#16
Philip Sarajlic, Cecilia Fridén, Lars H Lund, Aristomenis Manouras, Ashwin Venkateshvaran, Susanna C Larsson, Birgitta Nordgren, Christina H Opava, Ingrid E Lundberg, Magnus Bäck
OBJECTIVE: To establish how guided physical activity in patients with rheumatoid arthritis (RA) without known cardiovascular disease affected vascular and cardiac function, and how these two entities were prospectively interconnected in this patient group. METHODS: Prospective substudy of 29 participants in the Physical Activity in RA (PARA) 2010 trial. All subjects were examined at baseline, at year 1 and 2 with measures of pulse wave velocity and arterial augmentation index, as well as echocardiographic evaluation of diastolic parameters and ventricular-arterial coupling...
November 15, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29142592/advances-in-age-related-macular-degeneration-understanding-and-therapy
#17
Joan W Miller, Saghar Bagheri, Demetrios G Vavvas
While the development of anti-vascular endothelial growth factor (anti-VEGF) as a therapy for neovascular age-related macular degeneration (AMD) was a great success, the pathologic processes underlying dry AMD that eventually leads to photoreceptor dysfunction, death, and vision loss remain elusive to date, with a lack of effective therapies and increasing prevalence of the disease. There is an overwhelming need to improve the classification system of AMD, to increase our understanding of cell death mechanisms involved in both neovascular and non-neovascular AMD, and to develop better biomarkers and clinical endpoints to eventually be able to identify better therapeutic targets-especially early in the disease process...
2017: US Ophthalmic Review
https://www.readbyqxmd.com/read/29142443/oral-health-and-erectile-dysfunction
#18
REVIEW
Vijendra P Singh, Sunil K Nettemu, Sowmya Nettem, Rajesh Hosadurga, Sangeeta U Nayak
Ample evidence strongly supports the fact that periodontal disease is a major risk factor for various systemic diseases namely cardio-vascular disease, diabetes mellitus, etc. Recently, investigators focussed on exploring the link between chronic periodontitis (CP) and erectile dysfunction (ED) by contributing to the endothelial dysfunction. Both the diseases share common risk factors. Various studies conducted in different parts of the world in recent years reported the evidence linking this relationship as well as improvement in ED with periodontal treatment...
July 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/29142252/gallic-acid-reduces-blood-pressure-and-attenuates-oxidative-stress-and-cardiac-hypertrophy-in-spontaneously-hypertensive-rats
#19
Li Jin, Zhe Hao Piao, Simei Sun, Bin Liu, Gwi Ran Kim, Young Mi Seok, Ming Quan Lin, Yuhee Ryu, Sin Young Choi, Hae Jin Kee, Myung Ho Jeong
Gallic acid (GA) has been reported to have beneficial effects on cancer, vascular calcification, and diabetes-induced myocardial dysfunction. We hypothesized that GA controls hypertension via oxidative stress response regulation in an animal model for essential hypertension. Spontaneously hypertensive rats (SHRs) were administered GA for 16 weeks. GA treatment lowered elevated systolic blood pressure in SHRs through the inhibition of vascular contractility and components of the renin-angiotensin II system. In addition, GA administration reduced aortic wall thickness and body weight in SHRs...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141949/microvascular-insulin-resistance-in-skeletal-muscle-and-brain-occurs-early-in-the-development-of-juvenile-obesity-in-pigs
#20
T Dylan Olver, Zachary Ian Grunewald, Thomas J Jurrissen, Rebecca Ek MacPherson, Paul J LeBlanc, Teagan R Schnurbusch, Alana M Czajkowski, Maurice Harold Laughlin, R Scott Rector, Shawn B Bender, Eric M Walters, Craig A Emter, Jaume Padilla
BACKGROUND: Impaired microvascular insulin signaling may develop prior to overt indices of microvascular endothelial dysfunction and represent an early pathological feature of adolescent obesity. Using a translational porcine model of juvenile obesity, we tested the hypotheses that in the early stages of obesity development, impaired insulin signaling manifests in skeletal muscle (triceps), brain (prefrontal cortex) and corresponding vasculatures, and that depressed insulin-induced vasodilation is reversible with acute inhibition of protein kinase C beta (PKCβ)...
November 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
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