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Peripheral arterial disease

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https://www.readbyqxmd.com/read/28641152/urea-induced-ros-accelerate-senescence-in-endothelial-progenitor-cells
#1
Maria D'Apolito, Anna Laura Colia, Maria Lasalvia, Vito Capozzi, Maria Pia Falcone, Massimo Pettoello-Mantovani, Michael Brownlee, Angela Bruna Maffione, Ida Giardino
BACKGROUND AND AIMS: The pathogenic events responsible for the reduction of endothelial progenitor cell (EPC) number and function seen in patients with chronic renal failure (CRF) are poorly understood. Here we investigate the hypothesis that increased concentrations of urea associated with CRF increase ROS production directly in EPCs, causing abnormalities associated with coronary artery disease risk. METHODS: Human EPCs were isolated from peripheral blood mononuclear cells of healthy donors and cultured in the presence or absence of 20 mmol/L urea...
June 15, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28636844/clonal-hematopoiesis-and-risk-of-atherosclerotic-cardiovascular-disease
#2
Siddhartha Jaiswal, Pradeep Natarajan, Alexander J Silver, Christopher J Gibson, Alexander G Bick, Eugenia Shvartz, Marie McConkey, Namrata Gupta, Stacey Gabriel, Diego Ardissino, Usman Baber, Roxana Mehran, Valentin Fuster, John Danesh, Philippe Frossard, Danish Saleheen, Olle Melander, Galina K Sukhova, Donna Neuberg, Peter Libby, Sekar Kathiresan, Benjamin L Ebert
Background Clonal hematopoiesis of indeterminate potential (CHIP), which is defined as the presence of an expanded somatic blood-cell clone in persons without other hematologic abnormalities, is common among older persons and is associated with an increased risk of hematologic cancer. We previously found preliminary evidence for an association between CHIP and atherosclerotic cardiovascular disease, but the nature of this association was unclear. Methods We used whole-exome sequencing to detect the presence of CHIP in peripheral-blood cells and associated such presence with coronary heart disease using samples from four case-control studies that together enrolled 4726 participants with coronary heart disease and 3529 controls...
June 21, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28635374/sepsis-favors-high-on-clopidogrel-platelet-reactivity
#3
Karolina Akinosoglou, Angelos Perperis, Spyridoula Theodoraki, Dimitrios Alexopoulos, Charalambos Gogos
High-on-treatment platelet reactivity (HPR) is associated with ischemic events in patients on antiplatelet therapy with a history of cardiovascular disease. On the other hand, recent data have associated sepsis with adverse cardiovascular events in patients admitted with bacteremia or respiratory infection. We aimed to assess P2Y12-mediated platelet reactivity (PR) during sepsis and recovery in patients under clopidogrel. This was a prospective observational study. Incoming patients presenting with signs/symptoms of sepsis already on a maintenance dose of clopidogrel of 75 mg qd for cardiovascular events were included in this study...
June 21, 2017: Platelets
https://www.readbyqxmd.com/read/28633641/expression-levels-of-atherosclerosis-associated-mir-143-and-mir-145-in-the-plasma-of-patients-with-hyperhomocysteinaemia
#4
Kejian Liu, Saiyare Xuekelati, Yue Zhang, Yin Yin, Yue Li, Rui Chai, Xinwei Li, Yi Peng, Jiangdong Wu, Xiaomei Guo
BACKGROUND: An elevated level of homocysteine (Hcy) in the blood is designated hyperhomocysteinaemia (Hhcy) and is regarded as a strong risk factor for the development of atherosclerosis (ATH), although the association remains controversial. Considered to be essential gene expression regulators, micro-RNAs (miRNAs) modulate cardiovascular disease development and thus can be regarded as potential biomarkers and therapeutic targets in atherosclerosis. The aim of the current study is to investigate the expression levels of atherosclerosis-associated miR-143 and miR-145 in Hhcy patients and predict the progress of atherosclerosis in Hhcy patients...
June 20, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28632001/vasodilator-responsiveness-in-idiopathic-pulmonary-arterial-hypertension-identifying-a-distinct-phenotype-with-distinct-physiology-and-distinct-prognosis
#5
David Langleben, Stylianos Orfanos
Within the cohort of patients suffering from idiopathic pulmonary arterial hypertension (IPAH) is a group that responds dramatically (VR-PAH) to an acute vasodilator challenge and that has excellent long-term hemodynamic improvement and prognosis on high dose calcium channel blockers compared with vasodilator non-responders (VN-PAH). For the purposes of diagnosing VR-PAH, there is to date no test to replace the acute vasodilator challenge. However, recent studies have identified markers that may aid in the identification of VR-PAH, including peripheral blood lymphocyte RNA expression levels of desmogelin-2 and Ras homolog gene family member Q, and plasma levels of provirus integration site for Moloney murine leukemia virus...
June 20, 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28631078/evaluation-of-the-association-between-sleep-apnea-and-polyunsaturated-fatty-acids-profiles-in-patients-after-percutaneous-coronary-intervention
#6
Keisuke Nakabayashi, Kentaro Jujo, Katsumi Saito, Toshiaki Oka, Nobuhisa Hagiwara
The long-term outcome is poor in patients with sleep apnea and cardiovascular disease. Polyunsaturated fatty acid (PUFA) is also known as an independent predictor for adverse clinical events. However, the profile of PUFA in sleep apnea patients with coronary artery disease (CAD) is still unclear. This study aimed to clarify the association between sleep apnea and PUFA profiles in patients with CAD. Two hundred seventy-four consecutive patients undergoing percutaneous coronary intervention (PCI) were screened for sleep apnea using nocturnal oximetry...
June 19, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28630267/a-structured-review-of-antithrombotic-therapy-in-peripheral-artery-disease-with-a-focus-on-revascularization-a-tasc-intersociety-consensus-for-the-management-of-peripheral-artery-disease-initiative
#7
REVIEW
Connie N Hess, Lars Norgren, Gary M Ansel, Warren H Capell, John P Fletcher, F Gerry R Fowkes, Anders Gottsäter, Kerry Hitos, Michael R Jaff, Joakim Nordanstig, William R Hiatt
Peripheral artery disease affects >200 million people worldwide and is associated with significant limb and cardiovascular morbidity and mortality. Limb revascularization is recommended to improve function and quality of life for symptomatic patients with peripheral artery disease with intermittent claudication who have not responded to medical treatment. For patients with critical limb ischemia, the goals of revascularization are to relieve pain, help wound healing, and prevent limb loss. The baseline risk of cardiovascular and limb-related events demonstrated among patients with stable peripheral artery disease is elevated after revascularization and related to atherothrombosis and restenosis...
June 20, 2017: Circulation
https://www.readbyqxmd.com/read/28627932/short-term-prognostic-effect-of-prior-cerebrovascular-and-peripheral-artery-disease-in-patients-with-acute-coronary-syndrome-can-we-do-better
#8
Filipa Cordeiro, Pedro S Mateus, Alberto Ferreira, Silvia Leao, Miguel Moz, J Ilidio Moreira
BACKGROUND: We sought to evaluate the impact of prior cerebrovascular and/or peripheral arterial disease (PAD) on in-hospital outcomes in patients with acute coronary syndromes. METHODS: From 1 October 2010 to 26 February 2016, 13,904 acute coronary syndrome patients were enrolled in a national multicentre registry. They were divided into four groups: prior stroke/transient ischaemic attack (stroke/TIA); prior PAD; prior stroke/TIA and PAD; none. The endpoints included in-hospital mortality and a composite endpoint of death, re-infarction and stroke during hospitalization...
June 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28626075/sex-differences-in-vascular-physiology-and-pathophysiology-estrogen-and-androgen-signaling-in-health-and-disease
#9
Austin C Boese, Seong Chul Kim, Ke-Jie Yin, Jean-Pyo Lee, Milton H Hamblin
Sex differences between women and men are often overlooked and underappreciated when studying the cardiovascular system. It has been long assumed that men and women are physiologically similar, and this notion has resulted in females being clinically evaluated and treated for cardiovascular pathophysiological complications as males. Currently, there is increased recognition of fundamental sex differences in cardiovascular function, anatomy, cell signaling, and pathophysiology. NIH has enacted guidelines expressly to gain knowledge about ways the sexes differ in both normal function and diseases at the various research levels (molecular, cellular, tissue, organ, system)...
June 16, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28625961/effect-of-atorvastatin-on-lower-extremity-function-of-patients-with-hypertension-and-peripheral-arterial-disease
#10
Kewei Zhang, Shuiting Zhai, Kun Li, Zhidong Zhang, Kun Li, Tianxiao Li
This paper aims to discuss the short-term effect of Atorvastatin on lower-extremity function of patients with hypertension and peripheral arterial disease (PAD). 40 patients with hypertension and ankle-brachial index (ABI) less than 0.9 were divided into the control group (20 cases) and Atorvastatin group (20 cases) and treated for 6 months. The variation between the 6-min walk and the gait speed of 4-m-walk before and after the treatment were respectively observed. With regard to the two groups, differences of the drop-out values before and after the treatment were adjusted in accordance with gender, ages, body mass index (BMI), difference values of systolic pressure, ABI, difference values of total cholesterol (TC), difference values of low density lipoprotein, triacylglycerol, smoking and drug-taking situation...
January 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28624225/inhibition-of-mef2a-enhances-neovascularization-via-post-transcriptional-regulation-of-14q32-micrornas-mir-329-and-mir-494
#11
Sabine M J Welten, Margreet R de Vries, Erna A B Peters, Sudhir Agrawal, Paul H A Quax, A Yaël Nossent
Improving the efficacy of neovascularization is a promising strategy to restore perfusion of ischemic tissues in patients with peripheral arterial disease. The 14q32 microRNA cluster is highly involved in neovascularization. The Mef2a transcription factor has been shown to induce transcription of the microRNAs within this cluster. We inhibited expression of Mef2a using gene-silencing oligonucleotides (GSOs) in an in vivo hind limb ischemia model. Treatment with GSO-Mef2a clearly improved blood flow recovery within 3 days (44% recovery versus 25% recovery in control) and persisted until 14 days after ischemia induction (80% recovery versus 60% recovery in control)...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28623351/regulation-of-angiopoietin-signalling-by-soluble-tie2-ectodomain-and-engineered-ligand-trap
#12
Deborah O A Alawo, Tariq A Tahir, Marlies Fischer, Declan G Bates, Svetlana R Amirova, Nicholas P J Brindle
Angiopoietin-1 (Angpt1) is a glycoprotein ligand important for maintaining the vascular system. It signals via a receptor tyrosine kinase expressed on the surface on endothelial cells, Tie2. This receptor can undergo regulated ectodomain cleavage that releases the ligand-binding domain (sTie2) into the circulation. The concentration of sTie2 is increased in a range of conditions, including peripheral arterial disease and myocardial infarction, where it has been suggested to bind and block Angpt1 resulting in vascular dysfunction...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623035/prevalence-and-risk-factors-associated-to-peripheral-arterial-disease-in-an-adult-population-from-colombia
#13
Lorena Urbano, Eliana Portilla, Wilson Muñoz, Albert Hofman, Carlos H Sierra-Torres
BACKGROUND: Cardiovascular diseases (CVD) are the most important cause of mortality in Latin America while peripheral arterial disease (PAD) is the third leading cause of atherosclerotic cardiovascular morbidity. OBJECTIVE: To establish the prevalence of PAD and the distribution of traditional CVD risk factors in a population from the Department of Cauca, Colombia. METHODS: A cross-sectional study was performed in a total of 10,000 subjects aged ≥40 years from 36 municipalities...
June 13, 2017: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/28622745/sex-differences-in-vascular-stiffness-and-relationship-to-the-risk-of-renal-functional-decline-in-patients-with-type-2-diabetes
#14
Kenneth A Earle, Lauren Ng, Sarah White, Karima Zitouni
BACKGROUND: Recent data suggest that the higher risk of end-stage renal disease in women compared with men is associated with waist circumference. We investigated whether vascular stiffness which is linked to visceral fat accumulation is gender specific and associated with a loss in renal function. METHODS: We studied 166 patients with type 2 diabetes at high risk of progressive renal disease. A vascular stiffness index was derived from measurement of the peripheral arterial pulse waveform using infrared finger photoplethysmography...
July 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28620055/the-effects-of-rsr13-on-microvascular-po2-kinetics-and-muscle-contractile-performance-in-the-rat-arterial-ligation-model-of-peripheral-arterial-disease
#15
Aiko Watanabe, David C Poole, Yutaka Kano
Exercise intolerance and claudication are symptomatic of peripheral arterial disease. There is a close relationship between muscle O2 delivery, microvascular oxygen partial pressure (PmvO2) and contractile performance. We therefore hypothesized that a reduction of hemoglobin-oxygen affinity via RSR13 would maintain a higher PmvO2 and enhance blood-muscle O2 transport and contractile function. In male Wistar rats we created hindlimb ischemia via right side iliac artery ligation (AL). The contralateral (left) muscle served as control (CONT)...
June 15, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28619186/ankle-brachial-index-and-peripheral-artery-disease-are-not-related-to%C3%A2-restless-legs-syndrome
#16
A Szentkirályi, H Völzke, W Hoffmann, M Dörr, H W Hense, K Berger
OBJECTIVE: Our aim was to investigate the relationship between impaired peripheral arterial circulation as measured by ankle-brachial index (ABI) and restless legs syndrome (RLS) in the general population. METHODS: Data are derived from three independent, German population-based, prospective studies: the control sample of BiDirect (N = 966), the second follow-up of SHIP (N = 2333), and a subsample of SHIP-Trend (N = 1269). RLS was assessed with questions based on the RLS minimal criteria...
July 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28618138/expansion-of-umbilical-cord-blood-aldehyde-dehydrogenase-expressing-cells-generates-myeloid-progenitor-cells-that-stimulate-limb-revascularization
#17
David M Putman, Tyler T Cooper, Stephen E Sherman, Ayesh K Seneviratne, Mark Hewitt, Gillian I Bell, David A Hess
Uncompromised by chronic disease-related comorbidities, human umbilical cord blood (UCB) progenitor cells with high aldehyde dehydrogenase activity (ALDH(hi) cells) stimulate blood vessel regeneration after intra-muscular transplantation. However, implementation of cellular therapies using UCB ALDH(hi) cells for critical limb ischemia, the most severe form of severe peripheral artery disease, is limited by the rarity (<0.5%) of these cells. Our goal was to generate a clinically-translatable, allogeneic cell population for vessel regenerative therapies, via ex vivo expansion of UCB ALDH(hi) cells without loss of pro-angiogenic potency...
June 15, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28617696/should-hyperoxia-be-avoided-during-sepsis-an-experimental-study-in-ovine-peritonitis
#18
Xinrong He, Fuhong Su, Keliang Xie, Fabio Silvio Taccone, Katia Donadello, Jean-Louis Vincent
OBJECTIVES: Optimizing oxygen delivery is an important part of the hemodynamic resuscitation of septic shock, but concerns have been raised over the potentially deleterious effects of hyperoxia. We evaluated the impact of hyperoxia on hemodynamics, the microcirculation, and cerebral and renal metabolism in an ovine model of septic shock. DESIGN: Randomized animal study. SETTING: University hospital animal research laboratory. SUBJECTS: Fourteen adult female sheep...
June 14, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28616545/assessment-of-various-parameters-using-simple-non-invasive-tests-in-patients-with-cardiovascular-diseases-with-or-without-cardiac-rehabilitation
#19
Takashi Ueda, Shin-Ichiro Miura, Kanta Fujimi, Toshihisa Ishida, Takuro Matsuda, Masaomi Fujita, Yoshiyuki Ura, Kouji Kaino, Maya Sakamoto, Tomoe Horita, Tadaaki Arimura, Yuhei Shiga, Takashi Kuwano, Ken Kitajima, Keijiro Saku
Cardiac rehabilitation (CR) improves cardiac function and exercise capacity in patients with cardiovascular disease (CVD). Simpler techniques are needed for use by physicians in the examination room to assess the usefulness of CR. We enrolled 46 consecutive CVD patients in a CR program (CR group) and prospectively followed them for 3 months. We compared them to 18 age-, gender- and body mass index-matched CVD patients without CR (non-CR group). Various parameters were measured at baseline and after 3 months using 3 simple non-invasive tests: severity of atherosclerosis [arterial velocity pulse index and arterial pressure volume index (API)] were determined using PASESA®, an autonomic nerve total activity amount index and a coefficient of variation of the R-R interval (CVRR) were determined using eHEART®, and peripheral resistance index, pressure rate product, stroke volume and cardiac index were determined using nico®]...
September 2016: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28616377/blue-after-splenectomy
#20
Taaran Cariappa Ballachanda Subbaiah, Jeremy P Feldman
INTRODUCTION: We present a 51 year old, African American, female who presented with persistent hypoxemia. She had been taking dapsone for many years for prophylaxis against Pneumocystic Jiroveci with no symptoms but eventually developed methemoglobinemia only after a splenectomy. From our literature review there are no documented cases that have demonstrated this relationship between dapsone, splenic function and methemoglobin and we hope to share our perplexing case and shed light on the interaction...
2017: Respiratory Medicine Case Reports
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