Michael Williams

ORCID: 0000-0003-4822-4962
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About
Contact & Profiles
Research Areas
  • Cardiac Imaging and Diagnostics
  • Acute Myocardial Infarction Research
  • Coronary Interventions and Diagnostics
  • Cardiac Valve Diseases and Treatments
  • Cardiovascular Function and Risk Factors
  • Lipoproteins and Cardiovascular Health
  • Heart Rate Variability and Autonomic Control
  • Cardiac, Anesthesia and Surgical Outcomes
  • Cardiovascular Disease and Adiposity
  • Cardiovascular and exercise physiology
  • Aortic aneurysm repair treatments
  • Cardiac Health and Mental Health
  • Protease and Inhibitor Mechanisms
  • Infective Endocarditis Diagnosis and Management
  • Cardiovascular Health and Disease Prevention
  • Adipokines, Inflammation, and Metabolic Diseases
  • Antioxidant Activity and Oxidative Stress
  • MicroRNA in disease regulation
  • Aortic Disease and Treatment Approaches
  • Advanced Radiotherapy Techniques
  • Cardiovascular Syncope and Autonomic Disorders
  • Trauma and Emergency Care Studies
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Atherosclerosis and Cardiovascular Diseases
  • Cancer-related molecular mechanisms research

University of Otago
2016-2025

Dunedin Public Hospital
2016-2025

Southern District Health Board
2021-2025

Royal Devon & Exeter NHS Foundation Trust
2024

Johns Hopkins University
2016-2024

Aurora St. Luke's Medical Center
2024

University of Wisconsin–Madison
2024

Edinburgh College
2024

University of Edinburgh
2019-2024

Moulton College
2023

Accumulation of eosinophils in the bronchial mucosa individuals with asthma is considered to be a central event pathogenesis asthma. In animal models, airway eosinophil recruitment and hyperresponsiveness response allergen challenge are reduced by specific targeting interleukin-5. A previous small dose-finding study found that mepolizumab, humanized anti-interleukin-5 monoclonal antibody, had no effect on humans.To investigate three intravenous infusions 250 or 750 mg at monthly intervals,...

10.1164/rccm.200701-085oc article EN American Journal of Respiratory and Critical Care Medicine 2007-09-14

It is known that cerebral blood flow declines with age in sedentary adults, although previous studies have involved small sample sizes, making the exact estimate of decline imprecise and effects possible moderator variables unknown. Animal indicate aerobic exercise can elevate flow; however, this possibility has not been examined humans. We how regular affects age-related velocity middle artery (MCAv) healthy Maximal oxygen consumption, body mass index (BMI), pressure MCAv were measured (n =...

10.1113/jphysiol.2008.158279 article EN The Journal of Physiology 2008-07-18

Previous studies examining blood pressure change over time have modeled an average population trajectory. Recent research among older adults suggests there may be subgroups with different trajectories. Identifying at risk of developing adult hypertension early in life can inform effective reduction efforts. We sought to identify systolic trajectories from childhood, their correlated factors, and early-midlife cardiovascular outcomes. Blood data ages 7, 11, 18, 26, 32, 38 years a...

10.1161/hypertensionaha.115.05831 article EN Hypertension 2015-10-06
Sólveig Grétarsdóttir Annette F. Baas Guðmar Þorleifsson Hilma Hólm Martin den Heijer and 95 more Jean-Paul P.M. de Vries Steef Kranendonk Clark J. Zeebregts S.M. van Sterkenburg Robert H. Geelkerken André M. van Rij Michael Williams A.P.M. Boll Jelena P. Kostic Aðalbjörg Jónasdóttir Áslaug Jónasdóttir G. Bragi Walters Gísli Másson Patrick Sulem Jona Saemundsdottir Magali Mouy Kristinn P. Magnússon Gerard Tromp James R. Elmore Natzi Sakalihasan Raymond Limet Jean-Olivier Defraigne Robert E. Ferrell Antti Ronkainen Ynte M. Ruigrok Cisca Wijmenga Diederick E. Grobbee Svati H. Shah Christopher B. Granger Arshed A. Quyyumi Viola Vaccarino Riyaz S. Patel A. Maziar Zafari Allan I. Levey Harland Austin Domenico Girelli Pier Franco Pignatti Oliviero Olivieri Nicola Martinelli Giovanni Malerba Elisabetta Trabetti Lewis C. Becker Diane M. Becker Muredach P. Reilly Daniel J. Rader Thomas Mueller Benjamin Dieplinger Meinhard Haltmayer Sigitas Urbonavičius Bengt Lindblad Anders Gottsäter Eleonora Gaetani Roberto Pola Philip Wells Marc Rodger Melissa Forgie Nicole Langlois Javier Corral Vicente Vicente J. Fontcuberta Francisco España Niels Grarup Torben Jørgensen Daniel R. Witte Torben Hansen Oluf Pedersen Katja K.H. Aben Jacqueline de Graaf Suzanne Holewijn Lasse Folkersen Anders Franco‐Cereceda Per Eriksson David Collier Hreinn Stefánsson Valgerður Steinthórsdóttir Þórunn Rafnar Einar Már Valdimarsson Hulda B. Magnadottir Sigurlaug Sveinbjörnsdóttir Ísleifur Ólafsson Magnús K. Magnússon Róbert Pálmason Vilhelmína Haraldsdóttir Karl Andersen Páll T. Önundarson Guðmundur Þorgeirsson Lambertus A. Kiemeney Janet T. Powell David J. Carey Helena Kuivaniemi Jes S. Lindholt Gregory T. Jones Augustine Kong Jan D. Blankensteijn Stefán E. Matthíasson

10.1038/ng.622 article EN Nature Genetics 2010-07-11

Abdominal aortic aneurysm (AAA) is a common human disease with high estimated heritability (0.7); however, only small number of associated genetic loci have been reported to date. In contrast, over 100 now reproducibly either blood lipid profile and/or coronary artery (CAD) (both risk factors for AAA) in large-scale meta-analyses. This study employed staged design investigate whether the these two phenotypes are also AAA. Validated CAD and dyslipidaemia underwent screening using Otago AAA...

10.1093/hmg/ddt141 article EN Human Molecular Genetics 2013-03-27

An experimental study of cardiovascular complications that arise during vertebroplasty was conducted.To investigate the sequential occurrence fat embolism and hypotension vertebroplasty.Vertebroplasty, augmentation vertebrae with polymethylmethacrylate, is a technique for treating osteoporotic compression fractures achieving prophylactic stabilization vertebral bodies at risk fracture. However, there concern acute could occur as in variety other orthopedic procedures.In six sheep, 6 mL...

10.1097/00007632-200203010-00005 article EN Spine 2002-03-01

The national status of regional trauma system development was evaluated by a survey sent to all state emergency medical services directors and chairpersons the American College Surgeons Committee on Trauma. Eight essential components based criteria set forth were listed. Only two states found have statewide coverage. Nineteen District Columbia lacked one or more system. remaining 29 had yet initiate process center designation. In response these shortcomings, an attempt made define barriers...

10.1001/jama.1988.03720240059035 article EN JAMA 1988-06-24

<h3>Background:</h3> Impaired lung function is associated with systemic inflammation and a risk factor for cardiovascular disease in older adults. It unknown when these associations emerge to what extent they are mediated by smoking, chronic airways disease, and/or established atherosclerosis. We explored the association between forced expiratory volume one second (FEV<sub>1</sub>) inflammatory marker C-reactive protein (CRP) young <h3>Methods:</h3> Associations spirometric blood CRP were...

10.1136/thx.2006.076877 article EN Thorax 2007-06-30

Abstract Background : Levels of anti‐oxidant polyphenols are higher in red than white wine and thought to contribute the reduced cardiovascular risk associated with moderate consumption observed epidemiological studies. Aim To compare acute effects ingestion on endothelial function subjects coronary artery disease (CAD). Methods Fourteen proven CAD were randomised consume a light meal single blind cross‐over study. Flow‐mediated dilatation (FMD) brachial was measured using high‐resolution...

10.1111/j.1444-0903.2004.00507.x article EN Internal Medicine Journal 2004-05-01

Endothelium-dependent vasodilation is impaired and predicts the risk of a coronary event in patients with artery disease (CAD). Oxidant stress increased systemic inflammation may contribute to this endothelial dysfunction. Aged garlic extract (AGE) contains antioxidant compounds increases nitric oxide production decreases output inflammatory cytokines from cultured cells. The aim study was test effect treatment AGE on brachial flow mediated endothelium-dependent dilation (FMD) circulating...

10.1002/ptr.1663 article EN Phytotherapy Research 2005-01-01

The aim of this study was to compare the acute effect (i) meals rich in saturated fat, oleic acid, and alpha-linolenic acid (ii) starch fiber on markers inflammation oxidative stress obese lean women. In a crossover study, 15 abdominally women (age, 54 +/- 9 years; BMI, 37.3 5.5 kg/m2) 14 53 10 22.9 1.9 consumed cream (CR), olive oil (OL), canola (CAN), potato (POT), All-Bran (BRAN) random order. Blood samples were collected before up 6 h after plasma interleukin-6 (IL-6), IL-8, tumor...

10.1038/oby.2008.334 article EN Obesity 2008-08-21

The physiological challenge of standing upright is evidenced by temporary symptoms light-headedness, dizziness, and nausea. It not known, however, if initial orthostatic hypotension (IOH) related associated with are to the occurrence syncope. Since IOH reflects immediate adjustments compared sustained during stress, we anticipated that severity would be unrelated Following a standardized period supine rest, healthy volunteers [ n = 46; 25 ± 5 yr old (mean SD)] were instructed stand for 3...

10.1152/japplphysiol.91650.2008 article EN Journal of Applied Physiology 2009-06-18

Microangiopathy due to endothelial dysfunction is a major contributing factor the development of diabetes-induced cardiovascular disease (CVD). Dysregulation endothelial-specific microRNAs (miRs) correlated with impaired angiogenesis and cell survival. We investigated profile two angiomiRs, miR-126, miR-132, in plasma type 2 diabetic individuals without any known history CVD as well cardiac tissues collected from diabetics undergoing surgery.The presence diabetes alone significantly...

10.1093/cvr/cvw235 article EN Cardiovascular Research 2016-11-16

Lipoprotein(a) [Lp(a)] is a low-density lipoprotein-like lipoprotein and important cardiovascular risk factor whose cognate receptor intracellular fate remains unknown.Our study aimed to determine the trafficking pathway for Lp(a) responsible its uptake in liver cells.Human hepatoma cells were treated with purified from human plasma studied using Western blot analysis localization of by confocal microscopy. was maximally internalized 2 hours detected an antiapo(a) antibody be localized...

10.1161/circresaha.116.310272 article EN Circulation Research 2016-12-22

Aim: Myocardial fibrosis is a well-established cause of increased myocardial stiffness and subsequent diastolic dysfunction in the diabetic heart. The molecular regulators that drive process fibrotic events heart are still unknown. We determined role microRNA (miR)-15 family remodelling Methods results: Right atrial appendage (RAA) left ventricular (LV) biopsy tissues collected from non-diabetic (ND) patients undergoing coronary artery bypass graft surgery showed significant down-regulation...

10.1042/cs20160916 article EN Clinical Science 2017-03-14
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