ASCO, Author Interviews, Breast Cancer, Cancer Research, University of Michigan / 28.02.2016

MedicalResearch.com Interview with: Sarah T. Hawley PhD MPH Professor of Medicine University of Michigan Medical Research: What is the background for this study? What are the main findings? Dr. Hawley: Research has shown that breast cancer patients do not have a good understanding of their risk of distant recurrence, and and that the fear of cancer spreading is one of the biggest concerns that patients have. The research that has been done shows that most patients over-esimate this risk, and think they have a bigger chance of the cancer coming back than they actually have. There has been relatively little done to investigate the association between patient over-estimation of risk and patient reported outcomes, specifically their quality of life. We therefore conducted our study to understand the extent of overestimation of risk in a population-based sample of breast cancer patients with very favorable prognosis (DCIS, low risk invasive breast cancer) using a numeric (number based) and descriptive (general understanding) measure, and to understand the association between over-estimation and quality of life. The main findings are that almost 40% of our sample of patients over-estimated their risk; 33% using a numeric measure and 15% using a descriptive measure. There was no clear “type” of patient who overestimated her risk of distant recurrence, though women with lower education more over overestimated numerically than those with higher education. Both numeric and descriptive over-estimation was associated with reduced quality of life outcomes, especially with frequency of worry about recurrence, however over estimating descriptively mattered the most. Women who overestimated their risk both numerically and descriptively had a nearly 10 fold odds of frequent worry compared to women who understood their risk. (more…)
Author Interviews, JAMA, Ophthalmology / 27.02.2016

MedicalResearch.com Interview with: Jason Hsu, MD Retina Service, Wills Eye Hospital Assistant Professor of Ophthalmology Thomas Jefferson University Mid Atlantic Retina Medical Research: What is the background for this study? What are the main findings? Dr. Hsu: There are some patients with the wet type of age-related macular degeneration (AMD) who have persistent swelling in the retina despite regular, repeated eye injections with the anti-vascular endothelial growth factor (anti-VEGF) medications (e.g., Avastin, Lucentis, and Eylea). I had postulated that if we could decrease the turnover of fluid inside the eye, it might allow the injected medicine to stay in the eye for a longer period of time. I chose dorzolamide-timolol (brand name: Cosopt), a commonly available prescription eye drop used for glaucoma, since it is a very potent aqueous suppressant. By slowing down the production of eye fluid, I theorized it might decrease the outflow of fluid and medicine from the eye. Our study was a small, nonrandomized, exploratory pilot study. We enrolled 10 patients with wet AMD who had persistent retinal swelling despite chronic, fixed interval anti-VEGF injections. We kept patients on the exact same anti-VEGF medication and continued to see them at the exact same interval that they had been on before study enrollment. Once enrolled, the only difference is that we had them start using dorzolamide-timolol eye drops twice a day for the course of the study. The results were fairly striking with the retinal thickness decreasing from around 420 microns to 334 microns at the final visit. This decrease in swelling was significant at the first study visit after starting the drops and remained significant throughout the course of the study. (more…)
Alcohol, Author Interviews, Cognitive Issues, NYU, OBGYNE, Sleep Disorders / 27.02.2016

MedicalResearch.com Interview with: Donald A. Wilson, Ph.D. Professor, Departments of Child & Adolescent Psychiatry and Neuroscience & Physiology NYU Langone Medical Center Senior Research Scientist Nathan Kline Institute for Psychiatric Research Medical Research: What is the background for this study? What are the main findings? Dr. Wilson: Fetal alcohol spectrum disorder (FASD) is characterized by cognitive, emotional and behavioral problems that are life-long.  Generally, it is assumed that the initial trauma of alcohol exposure at a critical time in life is the cause of these problems.  In this study using an animal model of FASD, we find that developmental alcohol causes a life-long disturbance in sleep.  Given that sleep is important for memory and emotion, among other things, this suggests that developmental alcohol can produce a daily insult to the brain, far outlasting that initial exposure.  Each night, the brain is unable to store memories, adjust emotional circuits, remove waste products, in the way that it should, because FASD has disrupted sleep. (more…)
Author Interviews, JAMA, Ophthalmology, Surgical Research, Toxin Research / 27.02.2016

MedicalResearch.com Interview with: Yu-Chih Hou, MD Department of Ophthalmology National Taiwan University Hospital Taipei, Taiwan MedicalResearch: What is the background for this study? Dr. Yu-Chih Hou: We have encountered 3 patients with right eye pain and corneal edema after left orofacial surgery under general anesthesia since December 6. 2010. The first patient underwent a left tongue tumor excision by an ENT doctor. Postoperative day one, corneal epithelial defect and edema with mild anterior chamber reaction were noted in the right eye. Because his presentation was different from corneal abrasion which was the most common eye injury after general anesthesia, we suspected this ocular complication could be due to toxic reaction to antiseptic. Although corneal edema decreased, corneal endothelial cell density decreased and cataract developed later in the first patient. Two months later, the second patient had a similar toxic keratopathy but with severe corneal edema in his right eye after wide tumor excision of left lower gingival cancer by dentist surgeons. We found the antiseptic they used contained alcohol. We recommended not to use alcohol-containing antiseptics in oral surgery. Unfortunately, more severe toxic keratopathy occurred in the third patient after a left nasal tumor excision by other ENT doctor one year later. Because these severe ocular complications may occur again, it raised us to do detail study and we found all antiseptics they used contained alcohol. We hope to prevent occurrence of this toxic keratopathy in nonocular surgery by reporting our findings to other clinicians. (more…)
Author Interviews, Social Issues / 27.02.2016

MedicalResearch.com Interview with: Aaron W. Lukaszewski, Ph.D. Assistant Professor Department of Psychology Oklahoma State University Medical Research: What is the background for this study? What are the main findings? Dr. Lukaszewski: A large body of evidence from multiple social science fields indicates that physically formidable men tend to attain positions of leadership and prestige within cooperative groups (e.g., communities, businesses, nations). The most common explanation for this phenomenon is that strong men ascend hierarchies by aggressively intimidating their rivals and fellow group members into submission -- much like chickens use physical contests to establish "pecking orders" that define rank. The current research advances a different explanation for why formidable men attain high status. Specifically, we propose that members of cooperative groups willingly confer high status upon physically strong men, because they are perceived as possessing specific leadership capacities. To test this, we had people view photographs of men and women whose physical strength had been previously measured, and evaluate them along specific dimensions. As predicted, stronger men (but not women) were seen as deserving higher status, and this was explained by the fact that such men were seen as being better leaders (as defined by their apparent ability to enforce group policies and represent the group to outsiders). Moreover, physically strong men who were seen as being likely to aggressively intimidate others were projected to acquire less status than their apparently gentler counterparts. Taken together, the findings support the idea that strong men are given higher status by others because they are perceived as being likely to use their strength to benefit the group by cost-effectively providing valuable leadership services. (more…)
AHA Journals, Author Interviews, CDC, Sugar / 26.02.2016

MedicalResearch.com Interview with: Sohyun Park, PhD Epidemiologist Epidemiology and Surveillance Team Obesity Prevention and Control Branch Division of Nutrition, Physical Activity, and Obesity National Center for Chronic Disease Prevention and Health Promotion Centers for Disease Control and Prevention Atlanta, Georgia  Medical Research: What is the background for this study? What are the main findings? Dr. Park: The 2013 BRFSS provides the most recent state data for this behavior using a short screener which showed that about 1 in 3 adults consumed sugar-sweetened beverages (SSBs) at least once per day, and SSB intake differed by state and by certain subgroups. The main findings of the study showed the following among the 23 states and DC surveyed the prevalence of adults who consumed sugar-sweetened beverages at least once daily was:
  • Aged 18-24 years (43.3%)
  • Men (34.1%)
  • Non-Hispanic Blacks (39.9%)
  • Unemployed (34.4%)
  • Had less than a high school education (42.4%)
  • Adult sugar-sweetened beverages intake was highest in Mississippi (47.5%), followed by Louisiana (45.5%) and West Virginia (45.2%).
  • The prevalence of  sugar-sweetened beverages intake one or more times per day among younger adults (18–24 years) was 2.3 times the prevalence among the older adults (aged 55 years and older)—43.3% versus 19.1%, respectively.
(more…)
Author Interviews, Blood Pressure - Hypertension, BMJ, Diabetes / 26.02.2016

MedicalResearch.com Interview with: Mattias Brunström, MD PhD student Department of Public Health and Clinical Medicine Umeå University Hospital Umeå, SE  Sweden Medical Research: What is the background for this study? What are the main findings? Dr. Brunström: Current guidelines differ in their recommendations on blood pressure treatment targets for people with diabetes. We did a systematic review and meta-analysis of 49 studies, including almost 74 000 patients, to investigate the effect of treatment at different blood pressure levels. We found that treatment reduced the risk of death, stroke, myocardial infarction and heart failure if systolic blood pressure before treatment was above 140 mm Hg. However, if systolic blood pressure was below 140 mm Hg, treatment increased the risk of cardiovascular death. (more…)
Author Interviews, Neurological Disorders, NYU / 26.02.2016

MedicalResearch.com Interview with: Michael A. Long, PhD New York University School of Medicine Assistant Professor New York Stem Cell Foundation Robertson Neuroscience Investigator Medical Research: What is the background for this study? Response: Speech is, of course, central to our everyday lives, and it is perhaps the most thoroughly studied human behavior.  That said, many aspects of how our brain produces speech are still poorly understood. Human brains are extremely complex, and many of the tools that are available to understand the function of the brain are quite limited.  Although we have a good idea of the brain regions involved in producing speech, our understanding of the roles that each area plays to enable us to produce words is much less clear. Medical Research: How did you become interested in this problem?  Response: I am a basic researcher focusing on the mechanisms that enable the brain to produce complex behaviors.  We primarily study the songbird brain, which contains several clearly defined areas that are dedicated to producing the song.  Through careful study, many research groups have discovered how these areas are working together to produce the song.  I realized that this kind of perspective may be useful to further our understanding of human speech production. Medical Research: How did you translate the findings from the songbird brain to the human brain? Response: Many years ago, when I was a postdoc with Michalel Fee at MIT, I used a small head-mounted cooling device to selectively lower the temperature of specific brain regions in the songbird by a few degrees.  To our surprise and delight, the cooling of a specific brain area – called HVC – resulted in a slowing of the tempo of that song.  From this finding, we realized that HVC was a key timing center for singing, and by cooling that ‘clock’, the song that was produced happened more slowly. When I established my own lab at NYU, I reached out Dr. Matthew Howard’s Neurosurgery group at the University of Iowa because of his impressive history of making fundamental discoveries about human brain function.  There I met Dr. Jeremy Greenlee, and we discussed using a cooling approach for understanding human speech.  Since 2011, we worked with 22 patients that were undergoing neurosurgery for either epilepsy or tumor removal.  Patients were asked to recite simple lists of words, like the days of the week, while a device with a footprint about the size of a quarter would cool different places along the surface of the brain.  (more…)
Author Interviews, Diabetes, Neurological Disorders, Yale / 26.02.2016

MedicalResearch.com Interview with: Sabrina Diano, Ph.D. Professor, Depts. Ob/Gyn, Neuroscience and Comparative Medicine Associate Chair for Faculty Development Dept Ob/Gyn and Reproductive Sciences Program in Cell Signaling and Neurobiology of Metabolism Yale University School of Medicine and Graduate School  Medical Research: What is the background for this study? What are the main findings? Dr. Diano: We have been studying the intracellular mechanisms that regulate glucose sensing by the brain. We found that in a specific area of the brain (called ventromedial nucleus of the hypothalamus) a small group of neurons (the brain cells) are able to sense increased glucose levels in the blood via their mitochondria, the energy powerhouse of the cells. This mitochondrial change enables these neurons to get activated, which in turn, results in a reduction of  glucose levels in the blood due to an increased muscles glucose utilization. (more…)
Author Interviews, Johns Hopkins, PLoS, Stem Cells / 26.02.2016

MedicalResearch.com Interview with: Dr. Andrew Jaffe PhD Investigator, Lieber Institute for Brain Development Assistant Professor Wendy Klag Center for Autism and Developmental Disabilities Johns Hopkins Bloomberg School of Public Health Medical Research: What is the background for this study? What are the main findings? Dr. Jaffe: Significant investments are being made worldwide in precision medicine, with much of the investment concentrated in the curation of stem cell lines for the generation of new tissues and organs. The most popular cell types for generating patient-specific stem cells are skin-derived and therefore receive potentially the highest amount of environmental exposure. In our study, we were interested in characterizing the genomic variability in fibroblast cells from two locations in the body across the lifespan. The two locations were the scalp, which is exposed to the environment, and the dura mater, which is the membrane under the skull and is largely protected from environmental insult. While the fibroblast cells from these two locations look indistinguishable under a microscope, we found widespread epigenetic and expression differences between the cells related to where they came from in the body and also related, to a lesser extent, to the age of the donor. As the field of personalized medicine continues to grow, this evidence necessitates further exploration into the epigenetic patterns in stem cells used for new tissue and organ generation. Additional research is required to determine which cells to cultivate and when, as researchers question how much epigenetic memory is actually erased when creating stem cell models. (more…)
AHA Journals, Author Interviews, Heart Disease, PAD, Surgical Research, University of Pennsylvania / 26.02.2016

MedicalResearch.com Interview with: Dr. Grace Wang MD FACS Assistant Professor of Surgery Division of Vascular and Endovascular Surgery Hospital of the University of Pennsylvania Medical Research: What is the background for this study? Dr. Wang: PAD is a major source of morbidity and mortality resulting in functional impairment, limb loss, as well as death. Despite epidemiologic studies which have contributed to our understanding of PAD prevalence and its association with traditional atherosclerotic risk factors, there have been conflicting studies published on the incidence of PAD and differences in treatment outcomes in women versus men. Patients with chronic kidney disease (CKD) are at particularly high risk for PAD. We set out to to define how the incidence of peripheral arterial disease (PAD) in chronic kidney disease (CKD) differs according to sex and age. (more…)
AHA Journals, Author Interviews, Gender Differences, Heart Disease, Race/Ethnic Diversity, Women's Heart Health / 26.02.2016

MedicalResearch.com Interview with: Karin H Humphries, MBA, DSc | Scientific Director BC Centre for Improved Cardiovascular Health UBC-HSF Professor in Women's Cardiovascular Health Vancouver, BC Medical Research: What is the background for this study? Response: Prior studies have shown that among patients with obstructive coronary artery disease (CAD), women have higher short- and long-term mortality rates as compared to men. Furthermore, a few studies have highlighted the existence of ethnic differences in the incidence of acute myocardial infarction (AMI) and outcomes following an AMI event. However, the joint contribution of sex and ethnicity on outcomes of patients with obstructive  coronary artery disease remains unknown. Our primary objective was to extend these findings by examining the joint impact of sex and ethnicity on long-term adverse outcomes of all patients with angiographic evidence of obstructive CAD presenting with myocardial ischemia. Our study included a population-based cohort of patients ≥ 20 years of age who underwent coronary angiography for acute coronary syndromes (ACS) or stable angina in British Columbia, Canada with angiographic evidence of ≥ 50% stenosis in any epicardial artery. (more…)
AHA Journals, Author Interviews, Heart Disease, Mental Health Research, Women's Heart Health / 26.02.2016

MedicalResearch.com Interview with: Dr. Kim Lavoie, Ph.D. CIHR New Investigator, FRQS Chercheur-Boursier Co-Director, Montreal Behavioural Medicine Centre Professor, Dept. of Psychology University of Quebec at Montreal Director, Chronic Disease Research Division, Hôpital du Sacré-Coeur de Montreal Adjunct Professor, Faculty of Medicine, University of Montreal Associate Researcher, Montreal Heart Institute Chair, Health Psychology and Behavioral Medicine Section Canadian Psychological Association Medical Research: What is the background for this study? Dr. Lavoie: We were interested in looking at whether rates of ischemia in men and women were different as a function of whether or not you had pre-existing heart disease (we would expect those with existing heart disease to have more ischemia because it’s a major marker of disease) or a comorbid anxiety or mood disorder (we expected anx/mood disorders would be associated with higher rates of ischemia because they reflect clinical levels of chronic stress, which has been linked to higher rates of ischemia in previous studies). Medical Research: What are the main findings? Dr. Lavoie: Overall, we found that men have higher rates of ischemia than women, and that anxiety or mood disorders overall aren't associated with higher or lower risk of ischemia (in those with or without previously diagnosed heart disease). HOWEVER, what we did find that was interesting and perhaps new, was that if you looked within women, those without previously diagnosed heart disease AND anxiety disorders (which including things like panic disorder and generalized anxiety - panickers and worriers) had higher rates of ischemia compared to those without anxiety disorders. This suggests higher rates of ischemia among women without heart disease, which seems counter-intuitive because you would expect those WITH disease to have more ischemia. The fact that anxiety disorders were present in those without previously diagnosed heart disease - and they were the ones with more ischemia, suggests that these women likely HAD heart disease that just hadn't been diagnosed up yet, and that the reason might have been because of their anxiety disorder, which can mask many symptoms of heart disease because many of them overlap (e.g., fatigue, decreased energy, heart palpitations, sweating, chest discomfort, hyperventilation, and fear/worry). This could lead physicians to misinterpret symptoms of real heart disease as those of anxiety - but this only appears to be the case in women according to our study, suggesting a possible sex/gender bias here. (more…)
Author Interviews, JACC, Metabolic Syndrome, OBGYNE, Race/Ethnic Diversity, Women's Heart Health / 26.02.2016

MedicalResearch.com Interview with: Catherine J. Vladutiu, PhD, MPH Research Assistant Professor, Department of Obstetrics & Gynecology Adjunct Assistant Professor, Department of Epidemiology Chapel Hill, NC Medical Research: What is the background for this study? Dr. Vladutiu: During pregnancy, women experience physiological changes and are at risk of pregnancy-related complications, some of which are associated with a higher risk of cardiovascular health outcomes in later life.  Physiologic adaptations occurring across successive pregnancies may be associated with an even higher risk of adverse cardiovascular outcomes. Previous studies have found an association between higher parity (i.e., number of live births) and the metabolic syndrome (MetS). However, no studies have examined this association in a Hispanic/Latina population. Hispanic women have a higher prevalence of the MetS than non-Hispanic women.  Latinos are also the fastest growing minority population in the U.S. and Hispanic/Latina women report higher fertility and birth rates than their non-Hispanic counterparts. (more…)
AHA Journals, Author Interviews, Brigham & Women's - Harvard, Heart Disease, Women's Heart Health / 26.02.2016

MedicalResearch.com Interview with: Mercedes Sotos Prieto, PhD Research Associate, Department of Nutrition Harvard T.H. Chan School of Public Health Boston, MA, 02115 Medical Research: What is the background for this study? What are the main findings? Dr. Sotos-Prieto: Given that CVD remains the leading cause of death in the US, the prevention of risk factor development through healthy lifestyle factors, or primordial prevention, is of paramount importance to minimize the long-term risk of CVD. However, the prevalence of these healthy behaviors among US adults remains low. The Healthy Heart Score is a 20-year CVD risk prediction model based on modifiable lifestyle factors and we have shown previously that this score effectively predicted the 20-year risk of CVD in mid-adulthood. Whether this risk score is associated with clinically-relevant CVD risk factors is unknown. Therefore, in this study we analyzed the association between the Healthy Heart Score and incidence of clinical CVD risk factors, including diabetes, hypertension, and hypercholesterolemia among 69,505 U.S women in the Nurses’ Health Study II during 20 years of follow-up. The Healthy Heart Score is based on the 9 most critical lifestyle factors that best estimate CVD risk including: current smoking, higher BMI, low physical activity, lack of moderate alcohol consumption, low intakes of fruits, vegetables, cereal fiber, and nuts, and high intakes of sugar-sweetened beverages and red and processed meats. The Healthy Heart Score estimates the 20 –year CVD risk, thus a higher score reflected a higher predictive CVD risk. Over 20 years, we documented 3,275 incident cases of diabetes, 17,420 of hypertension, and 24,385 of hypercholesterolemia. Our main findings showed that women with higher predicted CVD risk based on the Healthy Heart Score (highest quintile vs. lowest) had significantly greater risk of developing each clinical risk factor individually. Specifically, women with a higher predictive CVD risk had an 18-fold higher risk of type 2 diabetes, 5-fold higher risk of hypertension, and 3-fold higher risk of hypercholesterolemia over 20-years. Further, a higher predictive CVD risk was associated with a 53-fold greater risk of developing a high CVD risk profile (defined as the diagnosis of all 3 clinical risk factors) and this association was most pronounced among women who were younger, did not smoke, and had optimal weight (more…)
AHA Journals, Author Interviews, Gender Differences, Heart Disease, University of Pennsylvania, Women's Heart Health / 26.02.2016

MedicalResearch.com Interview with: Dr. Robert L. Wilensky MD Director, Interventional Cardiology Research Director, Interventional Cardiology Training Program Professor of Medicine Hospital of the University of Pennsylvania Medical Research: What is the background for this study? Dr. Wilensky: We wanted to evaluate whether young women, under the age of 50 years, had an increased risk for recurrent ischemic events after percutaneous coronary intervention (PCI) compared to young men or older women. Medical Research: What are the main findings?  Dr. Wilensky: Despite having less severe coronary artery disease,  had an increased risk of repeated events, generally need for repeat PCI in either the exact location of the original procedure or within the artery that underwent the procedure. This despite the finding that young women were treated with the same medications as young men. (more…)
Author Interviews, HIV / 26.02.2016

MedicalResearch.com Interview with: Wim Parys MD Global Head R&D Global Public Health Janssen  Medical Research: What is the background for this study? What are the main findings? Dr. Parys: In collaboration with ViiV Healthcare, we are working to develop the first long acting all-injectable combination regimen of Janssen’s rilpivirine and ViiV’s cabotegravir. Yesterday, we have announced promising Phase 2b data of this combination regimen which when given together every 4 or 8 weeks was able to maintain viral suppression with similar efficacy to a daily oral regimen of three HIV medicines. The results show that the combination met its primary endpoint at week 32. The study will now continue in its randomized controlled design for another 64 weeks enabling us to assess longer term outcomes. In parallel to this we will work to initiate the next stages of clinical development. (more…)
Author Interviews, Diabetes, Technology / 26.02.2016

MedicalResearch.com Interview with: Professor Tilak Dias College of Art & Design and Built Environment, School of Art & Design and Dr. Pasindu Lugoda Industrial Design, Fashion Design, Experimental Physics Electronic and Communication Engineering Nottingham Trent University Medical Research: Why are diabetics more prone to foot ulcers?  How prevalent is the problem? Response: Diabetic neuropathy contributes to foot ulcers that increases the chances of amputations if not treated. Every 30 seconds a limb is lost to diabetics. Medical Research: What is the background for the Siren Smart Sock System? What information is transmitted via the socks? Does the information go to the patient or a health care provider? Response: The temperature difference in between different points of the two feet are transmitted from the sensors in the sock. The information can be sent to the doctor or the patient’s mobile phone depending on what is needed.   (more…)
Author Interviews, Genetic Research, UCLA / 26.02.2016

MedicalResearch.com Interview with: April D. Pyle PhD Associate Professor, Microbiology, Immunology & Molecular Genetics Molecular Biology Institute Center for Duchenne Muscular Dystrophy Edythe Broad Center of Regenerative Medicine and Stem Cell Research University of California, Los Angeles, CA Medical Research: What is the background for this study? What are the main findings? Dr. Pyle: We have developed a CRISPR/Cas9 gene editing platform that is applicable for approximately 60 percent of Duchenne muscular dystrophy patients. Duchenne is a devastating muscle wasting disorder affecting approximately1 in 5000 boys worldwide. It is caused by lack of the dystrophin protein. In our study, we demonstrate that we can restore the dystrophin reading frame by deleting up to 725kb of the DMD gene between exons 45 and 55, the largest deletion shown to date in this gene, which results in a functional dystrophin protein being expressed. We demonstrated feasibility of this platform in Duchenne patient-derived human induced pluripotent stem cells differentiated to skeletal and cardiac muscle cells. (more…)
Author Interviews, Johns Hopkins, Kidney Disease, Race/Ethnic Diversity, Transplantation / 26.02.2016

MedicalResearch.com Interview with: Tanjala S. Purnell, PhD MPH Assistant Professor, Transplant Surgery and Epidemiology Johns Hopkins University School of Medicine  Medical Research: What is the background for this study? Dr. Purnell:  Kidney transplantation (KT) is the best treatment for most patients with end stage renal disease (ESRD), offering longer life expectancy and improved quality of life than dialysis treatment. Despite these benefits, previous reports suggest that black KT recipients experience poorer outcomes, such as higher kidney rejection and patient death, than white KT recipients. Our team wanted to examine whether this disparity has improved in recent decades. We hypothesized that advances in immunosuppression and post- kidney transplantation  management might differentially benefit black KT recipients, who were disproportionately burdened by immunological barriers, and contribute to reduced racial disparities in kidney transplantation outcomes. Medical Research: What are the main findings? Dr. Purnell: 
  1. From 1990 to 2012, 5-year failure rates of the transplanted kidney after Deceased Donor Kidney Transplantation (DDKT) decreased from 51.4% to 30.6% for blacks and from 37.3% to 25.0% for whites; 5-year failure after Living Donor Kidney Transplantation (LDKT) decreased from 37.4% to 22.2% for blacks and from 20.8% to 13.9% for whites.
  2. Among DDKT recipients in the earliest group of patients, blacks were 39% more likely than whites to experience 5-year failure, but this disparity narrowed to 10% in the most recent group.
  3. Among LDKT recipients in the earliest group, blacks were 53% more likely than whites to experience 5-year failure, but this disparity narrowed to 37% in the most recent group.
  4. There were no statistically significant differences in 1-year or 3-year failure rates of transplanted kidneys after LDKT or DDKT in the most recent groups.
(more…)
Author Interviews, Cancer Research, Colon Cancer, Journal Clinical Oncology, Radiation Therapy / 26.02.2016

MedicalResearch.com Interview with: Dr Guy van Hazel Clinical Professor of Medicine, School of Medicine and Pharmacology, University of Western Australia  Medical Research: What is the background for this study? What are the main findings? Dr. van Hazel: The SIRFLOX study is based on original work by Dr Bruce Gray and myself almost two decades ago, when we studied the combination of Selective Internal Radiation Therapy (SIRT) with Y-90 resin microspheres – which was absolutely new at the time – with hepatic artery chemotherapy. This study showed an increase in liver control with the addition of SIRT [Gray B et al. Ann Oncol 2001; 12: 1711–1720.]. We then proceeded to initiate a trial comparing systemic SIRT plus 5-FU/LV according to the Mayo Clinic regimen compared to the Mayo Clinic regimen alone, but unfortunately this had to be abandoned because new chemotherapy became available which made it unethical to offer the control arm. However, in those patients who were treated up to that point with SIRT plus 5-FU/LV [van Hazel G et al. J Surg Oncol 2004; 88: 78–85.] we did see a very high response rates compared to the control arm, with an impressive survival of 29 months. We subsequently did a phase l/ll study of modified FOLFOX6 with or without SIRT and again found very high response rates [Sharma R et al. J Clin Oncol 2007; 25: 1099–1106.].  This led us to launch the SIRFLOX study in 2007. (more…)
Alzheimer's - Dementia, Author Interviews, Cognitive Issues, Education, Mayo Clinic, Neurology / 25.02.2016

MedicalResearch.com Interview with: Prashanthi Vemuri, PhD Mayo Clinic Rochester, Minnesota  Medical Research: What is the background for this study? What are the main findings? Dr. Vemuri: Lifetime Intellectual enrichment has been found to delay the symptoms of dementia but the impact on brain changes due to Alzheimer’s disease has been poorly understood. In this study we studied the impact of lifetime intellectual enrichment (education, occupation, and midlife cognitive activities) on the brain changes related to Alzheimer’s disease. We obtained serial imaging on 393 individuals from a population based sample. We found that in majority of the individuals, there were minimal effects of intellectual enrichment on brain changes due to Alzheimer’s disease. However in those with higher genetic risk of Alzheimer’s, lifetime intellectual enrichment had a protective effect on the brain. (more…)
Author Interviews, Orthopedics, Transplantation / 25.02.2016

MedicalResearch.com Interview with: Dr. Brett Crist MD FACS Associate Professor of Orthopaedic Surgery Co-Chief, Orthopaedic Trauma Division Associate Director, Joint Preservation Surgery Director, Trauma Orthopaedic Fellowship School of Medicine University of Missouri Health  Medical Research: What is the background for this study? What are the main findings? Dr. Crist: Some young patients have bone and/or cartilage problems on the femoral head due to disease or injury.  Resurfacing the femoral head with donated bone and cartilage tissue is often a better option for these young patients with active lifestyles, who would otherwise require an artificial joint that would limit their activities and eventually wear out. However, there is no standard method for implantation. Our study provides initial clinical evidence that larger, size-matched grafts have the potential to improve outcomes when resurfacing cartilage defects of the femoral head in the hip joint. (more…)
Author Interviews, Cancer Research, Esophageal, Lung Cancer, Radiology, Surgical Research, University of Michigan / 25.02.2016

MedicalResearch.com Interview with: Mark A. Healy, MD Department of Surgery Center for Healthcare Outcomes & Policy, University of Michigan Ann Arbor, MI   Medical Research: What is the background for this study? What are the main findings? Dr. Healy: In our study, we found high overall use of PET as a primary study for recurrence detection in lung and esophageal cancers, with substantial hospital-based variation in the use of PET. Despite this, there was not a significant difference in survival for patients across high and low PET use hospitals. (more…)
Author Interviews, Dengue, Zika / 25.02.2016

MedicalResearch.com Interview with: Prof Paul Dyson Institute of Life Science Swansea University Medical School Singleton Park Swansea UK Medical Research: What is the background for this study? What are the main findings? Prof. Dyson: The spread of insect-vectored viruses such as Dengue and, more recently, Zika, underline the urgent necessity to develop new technologies to control insect disease vectors that, due to human activity, are spreading globally. The concept of using RNAi in insects is not new and is widely used as a research tool in the model organism Drosophila melanogaster. However, adapting RNAi for use in non-model insects has been slow, almost entirely due to the problem of delivering interfering RNA to the insect. Manual injection is a less than optimal means of delivery for larger insects, while including interfering RNA in a food source can be effective in smaller insects in the laboratory. But neither delivery system is suited for field applications of RNAi as a biocide. Faced with this challenge, we (myself and Dr Miranda Whitten) conceived the concept of symbiont-mediated RNAi and have advanced it with support from the UK BBSRC and the Gates Foundation, establishing it as a viable mechanism of delivery of RNAi in (a) a tropical disease vector, Rhodnius prolixus, a vector of Chagas disease, exemplified by targeting insect fertility, and (b) a globally invasive vector of plant disease, Western Flower Thrips, targeting larval growth. Interfering RNA is actively produced by symbiotic insect bacteria that multiply within the host. Critical to the technology is to ensure the stability of RNA synthesis by these bacteria. The interfering RNA is then released by the bacteria, absorbed and systemically circulated within the host, thereby causing knock-down of gene expression in specific tissues. We have exploited this technology to severely impair fertility of Rhodnius prolixus, and to cause mortality of developing larvae of Western Flower Thrips. As a biocide, the technology offers exquisite specificity due to the co-evolution and co-dependencies of the symbiont and its insect host, combined with the sequence-specificity of the RNAi. Moreover, development of resistance is highly improbable. (more…)
Author Interviews, Cancer Research / 25.02.2016

MedicalResearch.com Interview with: Ross Cagan, PhD Professor, Developmental and Regenerative Biology, Oncological Sciences, Ophthalmology Senior Associate Dean for the Graduate School of Biomedical Sciences Icahn School of Medicine at Mount Sinai Medical Research: What is the background for this study? What are the main findings? Dr. Cagan: Large scale screening for new cancer drugs typically rely on either cell culture or biochemical assays. These types of systems do not take into account the complexity of cancer and drug interactions at a whole animal level. We developed a whole animal screening method using Drosophila (fruit flies) as a model organism. Our model activates the Ras and PI3K oncogenic pathways specifically in lung-like Drosophila tissue. The end result is overproliferation, cell migration and animal lethality. These phenotypes were used to screen a large library of drugs, from which a number of hits were discovered. This study focused on the synergistic abilities of the Mek-inhibitor, trametinib, and a statin to rescue the cancerous phenotypes at a molecular, cellular and whole animal level. (more…)
Author Interviews, OBGYNE, Urology / 25.02.2016

MedicalResearch.com Interview with: Kari Aarne Olavi Tikkinen, M.D PHD Adjunct Professor Department of Urology Helsinki University Central Hospital and University of Helsinki Helsinki, Finland Medical Research: What is the background for this study? Dr. Tikkinen: ?Stress and urgency incontinence are the two most frequent and the most bothersome urinary symptoms among women. It has been estimated that about twelve percent of women report significant bother from stress incontinence and eight percent from urgency incontinence. Both stress urinary incontinence and urgency urinary incontinence are associated with substantial physical and psychological morbidity, and large societal costs. An extensive body of evidence suggests that delivering vaginally versus caesarean section increases rates of post-partum stress urinary incontinence. The magnitude of long term effects of different delivery modes on stress and urgency urinary incontinence remain, however, uncertain. ? (more…)
Author Interviews, Cost of Health Care, Health Care Systems, Hospital Readmissions, Technology / 25.02.2016

MedicalResearch.com Interview with: Andrey Ostrovsky, MD CEO | Co-Founder Care at Hand  Medical Research: What is the background for this study? Dr. Ostrovsky: Hospital readmissions are a large source of wasteful healthcare spending, and current care transition models are too expensive to be sustainable. One way to circumvent cost-prohibitive care transition programs is complement nurse-staffed care transition programs with those staffed by less expensive nonmedical workers. A major barrier to utilizing nonmedical workers is determining the appropriate time to escalate care to a clinician with a wider scope of practice. The objective of this study is to show how mobile technology can use the observations of nonmedical workers to stratify patients on the basis of their hospital readmission risk. (more…)
Author Interviews, Breast Cancer, Genetic Research, JAMA / 25.02.2016

MedicalResearch.com Interview with: Dr. Shoshana Rosenberg ScD, MPH Department of Medical Oncology Dana-Farber Cancer Institute Boston, Massachusetts Medical Research: Why would BRCA testing rates have increased among younger women with cancer?   Dr. Rosenberg: There has been increasing awareness surrounding genetic testing for breast cancer in more recent years, likely contributing to the trend that we saw over time  in our cohort. This has included more media attention, most notably Angelina Jolie’s sharing her story in 2013. Medical Research: Is this increase in testing a good thing? Dr. Rosenberg: Young women who are diagnosed with breast cancer should be getting tested so the fact that an increasing proportion of women have been undergoing BRCA testing in recent years indicates patients (and the physicians who treat them) are following recommendations. (more…)
Author Interviews, Heart Disease, NEJM, Pharmacology / 25.02.2016

MedicalResearch.com Interview with: Professor Paul Myles MBBS, MPH, MD, FCARCSI, FANZCA, FRCA Director, Dept of Anaesthesia and Perioperative Medicine Alfred Hospital and Monash University, Melbourne, Australia Medical Research: What is the background for this study? What are the main findings? Dr. Myles: When we set up this study 10 years ago there was marked variation in practice for  people taking aspirin waiting for coronary artery bypass surgery.  About half were being told that they must stop their aspirin 5-7 days before surgery, and the other half were told that they should stay on their aspirin. This variation existed across different countries, different cities, and even within a single hospital. Doctors had varied opinions because reliable medical research was sparse; the evidence was contradictory. We thus designed a definitive clinical trial in which half the patients were randomly assigned to receive aspirin and the other half received a placebo. Our study has shown that aspirin is safe (i.e. it does not increase the bleeding risk). We also found that there does not appear to be a benefit during and after surgery, but in view of the clear benefits that exist in daily life, including the preoperative waiting period, we recommend that people should stay on their aspirin if they are having coronary artery surgery. (more…)