MedicalResearch.com Interview with:
Professor Jane Armitage
Professor of Clinical Trials and Epidemiology
Clinical Trial Service Unit, Oxford Cardiovascular Science
Oxford, United Kingdom
Medical Research: What are the main findings of the study?
Prof. Armitage: The study showed that adding extended release niacin with laropiprant (to reduce the flushing) to standard treatment including statins in people with heart disease or strokes did not improve their outcome or reduce the risk of recurrent heart attacks or strokes.
MedicalResearch.com Interview with:
Mads E. Jørgensen, M.B.
University of Copenhagen, Denmark
Medical Research: What are the main findings of the study?
Answer: We included all patients undergoing non-cardiac surgery in 2005-2011, which were then categorized by time elapsed between stroke and surgery. Patients with a very recent stroke, i.e. less than 3 months prior to surgery, had a significant 14 times higher relative risk of 30-day MACE following surgery, compared with patients without prior stroke. Patients with a more distant stroke had a 2-5 fold higher risk of MACE following surgery, and still significantly higher than risks in patients without prior stroke.
An additional model including time between stroke and surgery as a continuous measure showed a steep decrease in risks of perioperative MACE during the first 9 months. After 9 months, an increase in time between stroke and surgery did not further reduce the risks. The results for 30-day all-cause mortality showed similar patterns, although estimates were not as dramatic as for 30-day MACE.
When analyzing the MACE components individually, we found that recurrent strokes were the main contributor to the high risk of MACE. A history of stroke any time prior to surgery was associated with a 16 fold increased relative risk of recurrent stroke, compared with patients without prior stroke.
We also performed analyses stratified by surgery risk as low- (OR for stroke anytime, 3.97; 95% CI, 2.79-5.66), intermediate- (OR for stroke anytime, 4.46; 95% CI, 2.87-5.13) and high-risk (OR for stroke anytime, 1.98; 95% CI, 1.20-3.27), which were somewhat challenged in power. However, results indicated that stroke associated relative risk was at least as high in low and intermediate-risk surgery as in high risk surgery.
MedicalResearch.com Interview with:
Ben Mead
Molecular Neuroscience Group
Neurotrauma and Neurodegeneration Section
School of Clinical and Experimental Medicine
University of Birmingham, Birmingham
Medical Research: What are the main findings of the study?
Answer: Traumatic and neurodegenerative disease of the retina lead to an irreversible loss of retinal ganglion cells (RGC) which are the neuronal cells located in the inner retina that transmit visual signals to the brain. Thus RGC injury results in visual defects which can ultimately progress into permanent blindness. One promising therapeutic approach is the use of stem cells as a source of replacement for lost retinal cells. However a theory has emerged suggesting that stem cells can act through the secretion of signalling molecules (growth factors). One stem cell that has recently shown great promise for neuronal repair are dental pulp stem cells (DPSC), which are multipotent stem cells easily isolated from adult teeth, including third molars (Mead et al 2013, 2014).
In our research, we transplanted either dental pulp stem cells or the more widely studied bone marrow-derived mesenchymal stem cell (BMSC) into the vitreous chamber of the eye after optic nerve crush (Mead et al 2013). The main finding of this study was that DPSC, to a significantly greater degree than BMSC, promoted the survival of injured RGC and the regeneration of their axons. We also showed that the mechanism of action was not through differentiation and replacement of cells but was actually paracrine mediated, i.e. through DPSC-derived growth factors (Mead et al, 2013, 2014).
MedicalResearch.com Interview with:
Grace Lu-Yao PhD, MPH
Professor of Medicine
Robert Wood Johnson Medical School
Rutgers, The State University of New Jersey
Rutgers Cancer Institute of New Jersey
New Brunswick, NJ 08903-2681
Medical Research: What are the main findings of the study?
Dr. Lu-Yao: Primary ADT (ie., use of androgen deprivation as an alternative to surgery, radiation or conservative management for the initial management of prostate cancer) is not associated with improved overall or disease specific survival.
MedicalResearch.com Interview with:
John D'Orazio, M.D., Ph.D.
Drury Pediatric Research Endowed Chair
Associate Professor, Univ. KY College of Medicine
Pediatric Hematology-Oncology
The Markey Cancer Center
Lexington, KY 40536-0096
Medical Research: What is the background for this study?
Dr. D'Orazio: Malignant melanoma is the deadliest of skin cancers, and it’s incidence has increased enormously over the last several decades. In the 1930’s only one in every fifteen hundred Americans would get melanoma in his/her lifetime. Now it’s one in fifty or sixty. Plus, it often affects young adults in the prime of their lives. Altogether, nearly 10,000 Americans die of melanoma every year. However, risk is not equally shared. Fair-skinned people who tend to burn rather than tan from sun exposure have a much higher risk than dark skinned people. On the surface, it would appear that the amount of melanin in the skin would be the only determinant of melanoma risk but the truth is more complex. Our lab has been interested in a particular hormonal pathway in the skin that directly influences melanoma risk. When UV radiation (sunlight) hits the skin, it causes damage to the cells of the skin. Cells respond to this damage to protect themselves against further injury. One way in which they do this is by turning on a hormone called melanocyte stimulating hormone, abbreviated “MSH”. Made by keratinocytes, the most abundant cells in the epidermis, MSH is directly responsible for ramping up melanin production by melanocytes, the cells that make the pigment in the skin that gives us a tan. This pigment called melanin acts as natural sunscreen and blocks UV radiation from penetrating into the skin. This is very important because people who can tan are in a much safer state the next time they get sun exposure. Because they have more melanin in the skin, the UV won’t cause as much damage. The key is to realize that UV causes mutations in melanocytes, and with enough damage to the DNA, melanocytes can turn cancerous and become melanomas. People who have the melanoma-prone, “can’t tan” skin type often have problems in this MSH hormonal pathway. Specifically, they have inherited problems with the receptor on melanocytes that binds to MSH and makes the cells make more pigment. This protein, called the melanocortin 1 receptor (or “MC1R”), is the way that melanocytes sense that the skin has been injured and needs more melanin. If the MC1R won’t signal, then melanocytes just sit there and can’t be induced to make more melanin pigment. Surely this is a major reason why people with MC1R signaling defects are at high risk of melanomas.
MedicalResearch.com Interview with
Rebecca H. Johnson, MD
Assistant Professor, Clinical Genetics
University of Washington
Seattle, Washington
Medical Research: What are the main findings of the study?
Dr. Johnson: We observed that, over the past two decades, there has been an increase in the incidence of testicular cancer in Hispanic American adolescents and young adults (AYAs) between 15 and 39 years of age. This increase is seen in both major subtypes of testicular cancer and affects Hispanic AYA patients with all stages of disease at the time of diagnosis. No comparable increase was observed in non-Hispanic white AYA,s or in older American men regardless of Hispanic ethnicity. Between 1992 and 2010, the incidence of testicular cancer in AYA Hispanics has increased 58% in contrast to just 7% in non-Hispanic white AYAs.
MedicalResearch.com Interview with:
Kurt Kroenke, M.D.
Professor of Medicine, Indiana University School of Medicine
Research Scientist, Indiana University Center for Health Services and Outcomes Research
Research Scientist, Center for Health Services Research, Regenstrief Institute, Inc.
Director of Education and Training Programs, Regenstrief Institute, Inc.
Core Investigator, VA HSR&D Center for Health Information and Communication
MedicalResearch.com Interview with:
Dr Hallvard Holdaas
Consultant in Nephrology
Department of Transplant Medicine
Oslo University Hospital
Rikshospitalet, Oslo Norway.
Medical Research: What are the main findings of the study?
Dr. Holdaas: Most studies examining long-term risk for living kidney donors have included comparators from the background population with hypertension, diabetes mellitus, reduced renal function, cancer and other concomitant diseases; or for the few studies with more “healthy” comparators the follow-up time have been restricted. In our study we compared living donors to a healthy non-donor population which would have qualified as donors themselves, with median follow-up of 15.1 years for the donors. The relative risk for the living donors compared to a healthy control was 11.38 for endstage renal disease (ESRD), 1.4 for cardiovascular death and 1.3 for all-cause mortality (Mjoen et al., 2014).
MedicalResearch.com Interview with:
Paul Kimmel, M.D.
Division of Kidney, Urologic and Hematologic Diseases
National Institute of Diabetes and Digestive and Kidney Diseases at the National Institutes of Health
Professor Division of Renal Diseases and Hypertension
The George Washington University
Medical Research: What are the main findings of the review?
Dr. Kimmel: AKI (Acute Kidney Injury) and CKD (Chronic Kidney Disease), two syndromes approached separately in medical school curricula as well as in the clinical arena are inextricably intertwined. They should be taught as a combined entity, culminating in progressive loss of renal function necessitating renal replacement therapy (dialysis or transplantation).
The two syndromes increase risk for cardiovascular disease and diminished quality of life as well. Preventive and therapeutic strategies should be directed at the combined entity.
MedicalResearch.com Interview with:
Iftikhar J. Kullo, MD
Division of Cardiovascular Diseases
Mayo Clinic Rochester, MN
Medical Research: What are the main findings of the study?
Dr. Kullo: The main findings of the study are:
1) Family history of stroke or heart attack is associated with presence of significant narrowing (greater than 70%) of the carotid arteries. These are the arteries that supply blood to the brain and narrowing or blockage of these arteries is associated with increased risk of stroke;
2) Having a sibling history of stroke or heart attack was more strongly associated with narrowing of the carotid artery than having a parent with such history;
3) The greater number of relatives with history of stroke or heart attack, the greater the odds of having narrowing in one of the carotid arteries.
MedicalResearch.com Interview with:
Dr. Kirsty Boyd
Programme theme head (Clinical Communication)
Honorary Clinical Senior Lecturer
Primary Palliative Care Research Group
Division of Community Health Sciences: General Practice
University of Edinburgh
Medical Research: What do we know already about people with ‘multimorbidity’?
Dr. Boyd: We know that an increasing number of patients have multiple life-limiting illnesses or progressively deteriorating health due to several long term conditions or general frailty. Caring for them well poses major challenges and they are often hospitalised in the last year of life. They do not fit well into illness and healthcare models that focus on single conditions. Understanding the experiences of patients and their family caregivers is vital to inform improvements in best supportive care and palliative care. We wanted to build on care models for integrated care of people with long term conditions and consider the needs of those at risk of dying with multiple conditions in more detail.
MedicalResearch.com Interview with:
Jeffrey Allen Kline
Vice Chair of Research
Department of Emergency Medicine
Indiana University Health
Medical Research: What are the main findings of this study?
Dr. Kline: We believe that clinicians use information from their patients’ faces to make decisions about diagnostic testing.
This is particularly relevant in emergency medicine, where the clinicians make decisions rapidly with limited information. We videotaped patients’ faces who had chest pain and dyspnea and used the most well-known facial scoring system to assess their facial expression variability in response to seeing visual stimuli. We found that patients who ultimately had emergent problems tended to hold their faces in a neutral position and be less likely to show the expression of surprise. The investigators were not surprised at this, but we did find that patients with emergent problems also tended to have less negative affect as well as less positive affect. In other words, patients who were sickest even tended to frown less than patients with no medical problem.
MedicalResearch.com Interview with:
Alejandro Arrieta, PhD
Assistant Professor
Department of Health Policy and Management
Florida International University
Medical Research: What are the main findings of the study?
Dr. Arrieta: We found that it makes business sense for insurance companies to reimburse patients for the cost of blood pressure monitors that they can use at home. In just the first year, we estimate that insurance companies can produce returns that range from $0.85 to $3.75 per dollar invested in blood pressure monitors provided to their members.
MedicalResearch.com Interview with:
Sripal Bangalore, MD, MHA, FACC, FAHA, FSCAI
Director of Research, Cardiac Catheterization Laboratory
Director, Cardiovascular Outcomes Group
Associate Professor of Medicine,
New York University School of Medcine
Principal Investigator ISCHEMIA-CKD trial
Medical Research: What are the main findings of the study?
Dr. Bangalore: Our objective was to evaluate whether non-fasting LDL has similar prognostic significance as that of the conventionally measured fasting LDL values. We found that in an analysis of over 16,000 patients from the National Health and Nutrition Examination Survey that the non-fasting LDL values had similar prognostic significance as that of fasting LDL values for the prediction of long term (up to 14 years) death or cardiovascular death, thus questioning the traditional practice of insisting that patients fast prior to blood draw for a lipid panel. This was also true for other components of the lipid panel including the triglycerides and total cholesterol.
Sandip M. Prasad MD
Assistant Professor
Medical University of South Carolina, Charleston, SC and
Scott E. Eggener, MD
Associate Professor of Surgery
Co-Director, Prostate Cancer Program
Director of Translational and Outcomes Research, Section of Urology
University of Chicago Medical Center, Chicago, IL;
Medical Research: What are the main findings of the study?
Answer: Depressed men with a diagnosis of intermediate- or high-risk prostate cancer have worse overall outcomes than those without baseline depression and are less likely to undergo definitive therapy. The difference in overall survival between men with and without a depression diagnosis was independent of prostate cancer treatment type.
MedicalResearch.com Interview with:
Dr Nils Muhlert
Wellcome Trust ISSF Research Fellow
School of Psychology
Cardiff University
Medical Research: What are the main findings of the study?
Dr. Muhlert: Decision making impairments are known to occur in people with multiple sclerosis (MS), and are important, given they can contribute to employment status, treatment compliance and function in everyday life. Studies by Kleeberg, Simioni and others have demonstrated that decision-making impairments can occur early in the course of multiple sclerosis and get worse as the disease progresses. Questions however remain over whether these impairments are linked to more general cognitive difficulties, differences between multiple sclerosis subtypes, and their relationship with MRI changes.
We assessed decision-making and examined MRI changes in a relatively large sample of people with multiple sclerosis (N = 105) and healthy controls (N = 43). All participants performed the Cambridge Gambling Task, which independently measures risk-taking, impulsivity, deliberation and risk adjustment, and underwent an MRI scan including T1-weighted and diffusion MRI sequences.
We demonstrate that people with multiple sclerosis experience difficulties with risk adjustment (gauging risk and adapting accordingly) and in the speed of making decisions but not in impulsivity. These problems were seen in those classified as having cognitive impairment and those not (i.e. cognitively unimpaired). We found that decision-making impairments were twice as common in people with relapsing-remitting and primary progressive MS than healthy controls, and almost four times as common in people with secondary progressive multiple sclerosis. In addition, decision making impairments in multiple sclerosis were linked to MRI changes in regions previously linked to decision-making in other conditions, including fronto-striatal and hippocampal regions. These findings offer insight into the precise decision-making difficulties experienced by people with multiple sclerosis, the relative prevalences in different subtypes of the disease and the pathological processes that may underlie them.
Eric Ravussin, Ph.D., Boyd Professor
Director Nutrition Obesity Research Center
Douglas L. Gordon Chair in Diabetes and Metabolism
Associate Executive Director for Clinical Science
Baton Rouge LA
Medical Research: What is the background of this study?
Dr. Ravussin: It has long been postulated that hypoxia is bad for metabolic health.
Hypoxia of adipose tissue has been thought to cause oxidative stress, resulting in the recruitment of macrophages with resultant secretion of cytokines and inflammation. However, repeated bouts of hypoxia induced during vigorous exercise results in increased glucose uptake and vascularization of muscle tissue. In addition, living at high altitude is associated with a lower prevalence of impaired fasting glucose and type 2 diabetes compared with living at low altitude.
Therefore, we asked the question, “What is the balance between the beneficial effects of hypoxia in muscle tissue and ‘bad’ effects in adipose tissue”? We devised a study in eight healthy men of different ethnicities, put into a hypoxic environment for 10 consecutive nights for 10 hours. The subjects slept in a hypoxic tent, using nitrogen dilution.
Medical Research: What are the main findings of the study?
Dr. Ravussin: The main findings of this study included:
MedicalResearch.com Interview with:
Christoher C. Kaeding M.D.
Judson Wilson Professor, Department of Orthopaedics
Executive Director, Sports Medicine Center
Head Team Physician, Department of Athletics
The Ohio State University
MedicalResearch: What are the main findings of the study?
Dr. Kaeding:
MedicalResearch.com Interview with:
Gregory Tasian, MD, MSc, MSCE
Attending Urologist
The Children’s Hospital of Philadelphia
Medical Research: What are the main findings of the study?
Dr. Tasian: The risk of developing kidney stones increased during the study period in all the cities except Los Angeles when mean daily temperatures rose above 50°F (10°C). Mean daily temperatures reaching 86°F (30°C) were associated with risk increases of 38% in Atlanta, 37% in Chicago, 36% in Dallas, and 47% in Philadelphia compared with 50°F (10°C). Kidney stone risk peaked within 3-5 days of exposure to high temperatures but then decreased within 7 to 10 days afterward.
MedicalResearch.com Interview with:
Jeff Trost, MD
Assistant Professor of Medicine
Johns Hopkins Medicine
Medical Research: What are the main findings of the study?
Dr. Trost: In our study, we reported the use of two relatively simple tactics to significantly reduce the number of unnecessary blood tests to assess symptoms of heart attack and chest pain and to achieve a large decrease in patient charges.
Specifically, we
MedicalResearch.com Interview with:
Ms Qi Wu:
Mental Health and Addiction Research Group, Department of Health Sciences
University of York, Heslington
York UK
Medical Research: What are the main findings of the study?
Ms Qi Wu: At any time in the UK about one in six adults has a mental health problem, the prevalence of smoking in this group is over 33%, which is around 50% higher than in the general population. It is estimated that 3 million adults with mental disorders were smokers in 2009-10. Meanwhile, people with mental health disorders are also more likely to smoke heavily, this group accounts for as much as 42% of the total national tobacco consumption. In this study, we calculated the avoidable economic burden of smoking in people with mental disorders.
The main finding was that people with mental disorders who smoke cost the UK economy £2.34 billion a year. The total costs are more or less equally divided among losses sustained from premature death, lost productivity, and healthcare costs to treat smoking related diseases such as lung cancer, cardiovascular disease and chronic obstructive pulmonary disease (COPD) in this group. An estimated £719 million (31% of the total cost) was spent on treating diseases caused by smoking. Productivity losses due to smoking-related diseases were about £823 million (35%) for work- related absenteeism and £797 million (34%) was associated with premature mortality.
MedicalResearch.com Interview with:
Pete Dodd (BA, BSc, MMath, PhD)
Research associate in health economic modelling
Health Economics and Decision Science
ScHARR
Regent Court Sheffield
Medical Research: What are the main findings of the study?
Dr. Dodd: We found that over 650,000 children under the age of 15 developed tuberculosis in the 22 highest burden countries in 2010, with around 7.6 million becoming infected with the bacillus and more than 50 million harboring latent infection.
Our work points to a much larger gap between notifications and incidence in children compared to adults.
MedicalResearch.com Interview with:
Anthony Bavry, MD MPH
Interventional Cardiology, North Florida/South Georgia Veterans Health System
Associate Professor of Medicine, University of Florida
Gainesville, FL 32610
Medical Research: What are the main findings of the study?
Dr. Bavry:
1) Among post-menopausal women, the regular use of NSAIDs was associated with an increased risk of cardiovascular death, myocardial infarction, or stroke.
2) Cardiovascular risk was observed among users of celecoxib, naproxen, but not ibuprofen.
MedicalResearch.com Interview with:
Andrea Wang-GillamMD, PhD
Assistant Professor, Department of Medicine
Oncology Division, Medical Oncology Section
Washington University School of Medicine in St. Louis
Medical Research: What are the main findings of the study?
Dr. Wang-Gillam: This is a global randomized phase III trial of MM398 plus 5FU/LV vs. MM398 vs. 5FU/LV in patients with metastatic pancreatic cancer who had received prior gemcitabine-based therapy. The primary endpoint was overall survival (OS). The secondary endpoints included progression-free survival (PFS), response rate (RR), biochemical response and safety. The trial achieved its primary endpoint. The median overall survival was statistically longer with the combination of MM398 plus 5FU/LV compared with 5FU/LV alone (6.1 months vs 4.2 months; HR of 0.67; p=0.0122). A superior progression-free survival was also seen in the MM398 plus 5FU/LV group compared with the 5FU/LV alone group (3.1 months vs 1.5 months; HR of 0.56; p=0.0001). A higher response rate was observed in the combination regimen compared with the 5FU/LV group (16% vs 1%). There were no differences in overall survival or PFS between the MM 398 monotherapy and 5FU/LV groups.