Abbvie, Author Interviews, Hepatitis - Liver Disease, NEJM, Pharmaceutical Companies / 29.01.2018

MedicalResearch.com Interview with: Stefan Zeuzem, M.D. Professor of Medicine Chief Internal Medicine Goethe University Hospital Frankfurt, Germany MedicalResearch.com: What is the background for this study? What are the main findings?  Response: Chronic hepatitis C virus (HCV) infection is a major global public health problem with more than 71 million people infected worldwide, and can result in significant morbidity and mortality, including liver cirrhosis, hepatocellular carcinoma, and death.1 This publication describes the efficacy and safety results from two Phase 3 clinical trials, ENDURANCE-1 and ENDURANCE-3, in patients with chronic HCV genotypes (GT) 1 or 3 infection who were treated with an all-oral, once-daily combination regimen of direct-acting antiviral agents (DAA) glecaprevir (GLE) at 300 mg and pibrentasvir (PIB) at 120 mg. The findings from ENDURANCE-1 trial show that the GLE/PIB combination regimen (G/P) given for 8 weeks to HCV GT1 chronically infected non-cirrhotic treatment-naïve or treatment-experienced (with sofosbuvir and/or interferon with ribavirin) patients was safe and well-tolerated, achieved high efficacy with a sustained virologic response at post-treatment week 12 (SVR12) rate >99% and was non-inferior to 12-week treatment with G/P. The trial also included subjects who were co-infected with human immunodeficiency virus (HIV), and all of these subjects achieved SVR12 while maintaining HIV suppression throughout the study. ENDURANCE-3 trial results show that the G/P regimen given for 8 weeks to HCV GT3 chronically infected non-cirrhotic treatment-naïve patients was safe and well-tolerated, achieved high efficacy in this historically difficult to cure GT with an SVR12 rate >94%, and was non-inferior to 12-week treatment with G/P, which in turn was non-inferior to the treatment with 12-week DAA regimen of sofosbivir and daclatasvir.  (more…)
Author Interviews, Biomarkers, BMJ, Genetic Research, Prostate Cancer, UCSD / 29.01.2018

MedicalResearch.com Interview with: “DNA” by Caroline Davis2010 is licensed under CC BY 2.0Tyler Seibert, MD, PhD Radiation Oncology Center for Multimodal Imaging & Genetics UC San Diego MedicalResearch.com: What is the background for this study? Response: Prostate cancer is an extremely common condition in men. Many die from it each year, and many others live with debilitating pain caused by prostate cancer. Screening for prostate cancer with prostate-specific antigen (PSA) testing can be effective, but there are concerns with the test.
  • First, screening everyone gives a large proportion of false-positive results, and those men end up undergoing unnecessary procedures such as prostate biopsy. S
  • econd, a significant portion of men who develop prostate cancer will develop a slow-growing form of the disease that is likely not life-threatening and may not require treatment. These concerns have led to a drop in prostate cancer screening. But avoiding screening leaves a large number of men vulnerable to diagnosis of an aggressive prostate cancer at a later stage, when it is more difficult—or impossible—to be cured. Doctors are left to guess which of their patients are at risk of aggressive disease and at which age they need to start screening those patients.
Our study sought to develop a tool to provide men and their doctors with objective, personalized information about each man’s risk of prostate cancer. Based on the man’s genetics, we wanted to predict the risk of aggressive prostate cancer and at what age in his life that risk becomes elevated. (more…)
Author Interviews, CMAJ, OBGYNE / 29.01.2018

MedicalResearch.com Interview with: “Don't forget the teens” by Jon Seidman is licensed under CC BY 2.0Ning Liu PhD Student Senior Research Analyst at ICES Institute of Health Policy, Management and Evaluation Institute for Clinical Evaluative Sciences University of Toronto MedicalResearch.com: What is the background for this study? What are the main findings? Response: Previous studies suggested intergenerational tendencies between a mother and her daughter in fertility patterns, such as when they give birth to a child for the first time, or the total number of children they have during their lifetime. We explored whether there is also an intergenerational tendency for induced abortion practices between a mother and her teen daughter. To do so, we used anonymized records of 431,623 daughters and their mothers, and found that a teenage daughter was twice as likely to have an induced abortion if her mother had had an induced abortion.  (more…)
Author Interviews, Dermatology, Electronic Records / 29.01.2018

MedicalResearch.com Interview with: “Computer” by FullCodePress is licensed under CC BY 2.0Matilda W. Nicholas, MD, PhD Duke Dermatology Durham, North Carolina MedicalResearch.com: What is the background for this study? Response: I have found many physicians overwhelmed by the electronic messaging feature in Electronic Health Record systems (EHRs). I found there was very little published about this phenomenon, particularly for specialists. So, we set out to take a look at the volume and effect these systems have.  MedicalResearch.com: What are the main findings?  Response: We found that, on average, clinicians receive 3.24 messages per patient visit, for an average of about 50 messages per full day of clinic. The number of messages also correlated with poor reported work life balance for dermatologists. (more…)
Author Interviews, Breast Cancer, Cancer Research, Yale / 28.01.2018

MedicalResearch.com Interview with: Lajos Pusztai, M.D, D.Phil. Professor of Medicine Director of Breast Cancer Translational Research Co-Director of the Yale Cancer Center Genetics, Genomics and Epigenetics Program Yale School of Medicine New Haven, CT  06511 MedicalResearch.com: What is the background for this study? Response: Overall, about 85% of newly diagnosed stage I-III breast cancer patients will not die of their disease, and this roughly equates to an 85% cure rate. Of course cure rates are higher for stage I cancers and lower for stage III cancers. An 85% overall cure rate is good but not good enough, we continuously try to develop new therapies hoping to push these rates to 90%...,95%...etc. However, it is not possible to cure a patient twice over. For example, if surgery plus endocrine therapy cures all patients, the addition of chemotherapy cannot improve on it no matter how effective it is. If surgery plus endocrine therapy cures 95%, adding the perfect chemo to this treatment can only bring about a 5% improvement, and very good chemo that would push cure from 95% to 97%, would require a very large trial including many thousands of patients. This is an increasingly common scenario in modern breast cancer adjuvant trials (where the goal is to improve survival and cure); the control arm that receives the current standard of care invariably does better than expected and the experimental arm only improves outcome by 1-3% that does not reach statistical significance.  The painful conclusion from these trials is that we do not know if the new drug actually works or not because there were not enough events to demonstrate an effect. Of course, a lot of patients in the study were also exposed to a new drug with all of its associated toxicities who could not possibly benefit from it. (more…)
Author Interviews, JAMA, Prostate Cancer, Radiation Therapy / 27.01.2018

MedicalResearch.com Interview with: Jason Alexander Efstathiou, D., PH.D Director, Genitourinary Division Department of Radiation Oncology Clinical Co-Director, The Claire and John Bertucci Center for Genitourinary Cancers Multidisciplinary Clinic Massachusetts General Hospital MedicalResearch.com: What is the background for this study? What are the main findings?  Response: When surgery has probably failed to cure a patient, the best prospective data supports the use of postoperative radiation therapy. The debate now centers on the optimal timing of such post-prostatectomy radiation therapy; is it adjuvant (ART) for all (with adverse pathologic features) or early salvage (ESRT) for some (who experience biochemical failure)? (more…)
ALS, Author Interviews, Neurological Disorders, Technology / 26.01.2018

MedicalResearch.com Interview with: David Brandman, MD, PhD Postdoctoral research associate (neuroengineering), Brown University Senior neurosurgical resident Dalhousie University BrainGate Website MedicalResearch.com: What is the background for this study? Response: People with cervical spinal cord injuries, ALS, or brainstem stroke, may lose some or all of their ability to use their arms or hands. In some cases, they may even lose the ability to speak. One approach to restoring neurologic function is by using a brain computer interface (BCI). BCIs record information from the brain, and then translate the recorded brain signals into commands used to control external devices. Our research group and others have shown that intracortical BCIs can provide people with tetraplegia the ability to communicate via a typing interface, to control a robotic limb for self-feeding, and to move their own muscles using functional electrical stimulation. Use of a BCI generally requires the oversight of a trained technician, both for system setup and calibration, before users can begin using the system independently. An open question with intracortical BCIs is how long it takes people to get up and running before they can communicate independently with 2 dimensional cursor control. The goal of this study was to systematically examine this question in three people with paralysis. As part of the ongoing BrainGate2 clinical trial, each study participant (T5, T8, and T10) had tiny (4x4 mm) arrays of electrodes implanted into a part of their brain that coordinates arm control. Each participant used motor imagery – that is, attempted or imagined moving their body – to control a computer cursor in real time. (more…)
Author Interviews, Pharmacology / 26.01.2018

MedicalResearch.com Interview with: “#Headache situation #ibuprofen” by Khairil Zhafri is licensed under CC BY 2.0David Kaufman, ScD Director, Slone Epidemiology Center, Boston Universit Professor of Epidemiolog Boston University School of Public Health  MedicalResearch.com: What is the background for this study?   Response: Ibuprofen and other nonsteroidal anti-inflammatory drugs (NSAIDs) are among the most-used medicines in the US, but, if too much is taken, can cause harm. This was an internet-based diary study.  1326 individuals who reported taking an ibuprofen medication in the preceding month completed a daily diary of their NSAID use for one week.  The daily dosage ingested was computed from the diary, which allowed us to determine whether a user exceed the recommended daily maximum dose. (more…)
Author Interviews, Environmental Risks, Pediatrics, Toxin Research / 26.01.2018

MedicalResearch.com Interview with: “Toys” by Holger Zscheyge is licensed under CC BY 2.0Dr Andrew Turner Reader in Environmental Science (Biogeochemistry and Toxicology) School of Geography, Earth and Environmental Sciences University of Plymouth, UK MedicalResearch.com: What is the background for this study? What are the main findings?  Response: The study arose through a larger investigation into hazardous substances in consumer plastics, both old and new. The main finding of the present research was the widespread occurrence of restricted elements in old plastic toys, and in particular cadmium, lead and bromine (the latter an indicator of the presence of flame retardants); in many cases, these elements could migrate from the plastic under conditions simulating the human digestive system. (more…)
Author Interviews, Education, Genetic Research / 26.01.2018

“Reading is fun!” by Isaac Wedin is licensed under CC BY 2.0MedicalResearch.com Interview with: Bruno Sauce, PhD and Louis D. Matzel, PhD Department of Psychology, Program in Behavioral and Systems Neuroscience Rutgers University New Jersey, USA  MedicalResearch.com: What is the background for this study? Response: Scientists have known for decades that intelligence has a high heritability, which means that much of the individual differences in IQ we see in people are due to genetic differences. Heritability is a value that ranges from 0.0 (meaning no genetic component) to 1.0 (meaning that the trait is completely heritable). For example, the heritability of breast cancer is estimated at 0.27; the heritability of body mass index is 0.59; and the heritability of major depression is 0.40. In comparison, the heritability of IQ is estimated to be as high as 0.8 – quite a high value! More recently, however, there have been studies showing that intelligence has a high malleability: the studies cover cognitive gains consequent to adoption/immigration, changes in IQ’s heritability across life span and socioeconomic status, gains in IQ over time from societal and scientific progress, the slowdown of age-related cognitive decline, the gains in intelligence from early education, differences in average IQ between countries due to wealth and development, and gains in intelligence that seem to happen from working memory training. Intelligence being both highly heritable and highly malleable is seemingly paradoxical, and this paradox has been the source of continuous controversy among scientists. Why does it matter? Because IQ predicts many important outcomes in life, such as academic grades, income, social mobility, happiness, marital stability and satisfaction, general health, longevity, reduced risk of accidents, and reduced risk of drug addiction (among many other outcomes). A clear understanding of the genetic and environmental causes of variation in intelligence is critical for future research, and its potential implications (and applications) for society are immense. (more…)
Author Interviews, Flu - Influenza, Nature, Vaccine Studies / 26.01.2018

MedicalResearch.com Interview with: “Syringe and Vaccine” by NIAID is licensed under CC BY 2.0Dr. Lei Deng PhD Postdoctoral researcher Institute for Biomedical Sciences at Georgia State University MedicalResearch.com: What is the background for this study? What are the main findings? Response: Influenza A viruses evade human herd immunity by genetic hypervariation. Annual influenza epidemics are estimated to cause about 3 to 5 million cases of severe illness, and about 290,000 to 650,000 deaths. Vaccination is still the most effective way to prevent diseases, but current influenza vaccines provide limited protections against mismatched circulating virus strains. This drives scientists to develop universal influenza vaccines that can induce broad immune responses against all influenza A virus infections. We used biochemistry and nanotechnology to generate a double-layered protein nanoparticle universal influenza vaccine. The layered nanoparticle contains genetically modified influenza virus components without irrelevant carry/structural proteins and chemicals and confers strong and long-lasting immunity in laboratory mice against H1N1, H3N2, H5N1 and H7N9 infections. We also explain the protection mechanism of antibody dependent cell-mediated cytotoxicity (ADCC) and antibody dependent cell-mediated phagocytosis (ADCP) play the main role in the immune protection.  (more…)
Author Interviews, CDC, Education, Pediatrics, Sleep Disorders / 26.01.2018

MedicalResearch.com Interview with: “He isn't sleeping, he is mad. When we don't get our way pouting always works (okay.. It's worth a try at least!) #kids #dad #father #family #funny #like #parenting #photooftheday #instaphoto #instacute” by dadblunders is licensed under CC BY 2.0Anne G. Wheaton, Ph.D. Epidemiologist Centers for Disease Control and Prevention National Center for Chronic Disease Prevention and Health Promotion Division of Population Health Epidemiology and Surveillance Branch Atlanta, GA  30341-3717 MedicalResearch.com: What is the background for this study? Response: Insufficient sleep among children and adolescents is associated with an increased risk for obesity, diabetes, injuries, poor mental health, and attention and behavior problems. In previous reports, CDC had found that, nationwide, approximately two thirds of U.S. high school students report sleeping <8 hours per night on school nights. CDC conducted this study to provide state-level estimates of short sleep duration on school nights among middle school and high school students using age-specific recommendations from the American Academy of Sleep Medicine (AASM). AASM has recommended that children aged 6–12 years should regularly sleep 9–12 hours per 24 hours and teenagers aged 13–18 years should sleep 8–10 hours per 24 hours for optimal health. (more…)
Author Interviews, Stroke / 26.01.2018

MedicalResearch.com Interview with: Dr. J. Mocco, MD Professor Neurosurgery Mount Sinai Beth Israel Mount Sinai St. Luke's and Mount Sinai West The Mount Sinai Hospital MedicalResearch.com: What is the background for this study? What are the main findings? Response: Numerous trials have demonstrated that Endovascular therapy is strongly beneficial for emergent large vessel stroke patients. The majority of patients in those trials were treated with Stent retrievers.  COMPASS was designed to evaluate a different type of Endovascular therapy called aspiration Thrombectomy.  (more…)
Author Interviews, Cognitive Issues, Geriatrics, Mayo Clinic / 25.01.2018

MedicalResearch.com Interview with: Richard J. Caselli MD Department of Neurology Mayo Clinic Arizona Scottsdale, AZ   MedicalResearch.com: What is the background for this study? What are the main findings? Response: Personality changes are common in patients with a variety of dementing illnesses, and underlie the behavioral disturbances that complicate the course of dementia patients.  We have a been conducting a large longitudinal study of cognitive aging in individuals at genetically defined risk for Alzheimer’s disease (AD) based on their APOE genotype, and have been administering a large battery of neuropsychological tests as well as the gold standard personality questionnaire (the NEO-PI-R) in order to determine whether personality changes during the transition from normal cognition/preclinical AD to mild cognitive impairment.   (more…)
Author Interviews, BMJ, Pulmonary Disease, Surgical Research / 25.01.2018

MedicalResearch.com Interview with: Ianthe Boden Titled Cardiorespiratory APAM, PhD Candidate, MSc, BAppSc Manager Abdominal Surgery Research Group Clinical Lead – Cardiorespiratory Physiotherapy, Physiotherapy Department Allied Health Services Tasmanian Health Services – North | Launceston General Hospital Launceston TA  MedicalResearch.com: What is the background for this study? Response: Major upper abdominal surgery involves opening up the abdomen - mainly to remove cancer or damaged bowel, liver, stomach, pancreas, or kidney.  It is, by far, the most common major surgical procedure performed in developed countries with millions of procedures performed per annum. Unfortunately a respiratory complication following these operations occurs relatively frequently with between 1 in 10 to almost a half of all patients getting some type of respiratory complication after surgery. Respiratory complications included problems such as pneumonia, lung collapse, respiratory failure, and an acute asthma attack. These complications, especially pneumonia and respiratory failure, are strongly associated with significant morbidity, mortality, increased antibiotic usage and longer hospital stay. These breathing problems occur quite quickly after surgery, becoming evident usually within the first two to three days after surgery. In an effort to ameliorate these complications in developed countries it is common for physiotherapists/respiratory therapists to see a patient for the first time on the day after surgery and start patients doing breathing exercises. However as respiratory dysfunction starts occurring immediately following surgery it is debated that these breathing exercises are being provided too late. Initiating prophylactic treatment more than 24 hours after the end of surgery may not be as effective as starting prophylaxis immediately. Unfortunately, immediately after surgery patients are either very sleepy, in pain, feeling sick, or delirious. It may not be possible to effectively teach patients at this point on the importance of breathing exercises and get good performance. One method to overcome this would be to meet patients before the operation to educate them about their risk of a postoperative chest infection and to motivate and train them to perform breathing exercises to do immediately on waking from surgery. Previous trials have indicated that this may help prevent postoperative respiratory complications, although evidence is inconclusive and weak. We set out to robustly and conclusively see if respiratory complications could be prevented after major upper abdominal surgery if patients were taught breathing exercises to do as soon as they woke up after the operation. We ran this trial in two countries (Australia and New Zealand) and three different types of hospitals.  All patients were met by a physiotherapist at our hospitals’ scheduled pre-admission clinic appointment and either provided with an information booklet (control) or provided with an additional 30 minute education and training session with the physiotherapist. At this preoperative session the patient was educated about respiratory complications, their risk, and how to prevent them with breathing exercises. These exercises were then taught and practiced for just three repetitions. Patients were instructed to do these breathing exercises for 20 repetitions as soon as they woke from surgery and then 20 times every hour after surgery until they were up and out of bed frequently. Following surgery each patient had a standardised rehabilitation program and no respiratory therapy of any type was provided to the patients after surgery. For the first two weeks after surgery patients were assessed daily for a respiratory complication by research assistants unaware of what treatment the patient had received before surgery. (more…)
Artificial Sweeteners, Author Interviews, Cancer Research / 25.01.2018

MedicalResearch.com Interview with: Prof. Robert McKenna PhD Department of Biochemistry and Molecular Biology College of Medicine, University of Florida Gainesville, Florida 32610 MedicalResearch.com: What is the background for this study? What are the main findings? Response: Carbonic anhydrase IX (CA IX) is an enzyme that is typically only found in the GI tract, but is overexpressed in cancerous tissue. This enzyme functions to regulate the pH of tumor cells, so we hypothesize that disruption of this role will lead to tumor cell death. This study analyzes the inhibition of CA IX using an artificial sweetener, acesulfame potassium (AceK). Our research provides a structural perspective to understand the selectivity of aceK for CA IX over an off-target enzyme, CA II. We discovered that aceK binds directly to an active site zinc in CA IX whereas the sweetener anchors through a zinc-bound water in CA II. (more…)
Addiction, Alcohol, Author Interviews / 25.01.2018

MedicalResearch.com Interview with: “Alcohol Poisoning PSA Video Shoot” by Stop Alcohol Deaths, Inc. is licensed under CC BY 2.0Dr. Frank de Vocht Senior Lecturer in Epidemiology and Public Health Research Academic Lead Year 1 MBChB (MB21) ‘Foundations of Medicine’ Programme Population Health Sciences Bristol Medical School University of Bristol  MedicalResearch.com: What is the background for this study? Response: We were interested in prospectively investigating whether people who drink alcohol in the general population (so not patients), and who indicated that the were planning to reduce their consumption or complete stop drinking in the near future would, on average, succeed and have reduced consumption six months later.  (more…)
Author Interviews, Cognitive Issues, Genetic Research, JAMA, Medical Imaging, Mental Health Research / 25.01.2018

MedicalResearch.com Interview with: “The Fourth Sex: Adolescent Extremes” by Victor Soto is licensed under CC BY 2.0Dag Alnaes, PhD Norwegian Centre for Mental Disorders Research KG Jebsen Centre for Psychosis Research Division of Mental Health and Addiction, Oslo University Hospital Oslo, Norway  MedicalResearch.com: What is the background for this study? What are the main findings? Response: The transition from childhood to adulthood is characterized by swift and dramatic changes, both in our environment and in our brains. This period of life also coincides with the onset of many mental disorders. To gain a better understanding of why, the clinical neurosciences must attempt to disentangle the complex and dynamic interactions between genes and the environment and how they shape our brains. The ultimate goal is to be able to predict which individuals are at risk before clinical symptoms appear. Advanced brain imaging has been proposed to represent one promising approach for such early detection, but there is currently no robust imaging marker that allows us to identify individuals at risk with any clinically relevant degree of certainty. Our study shows that self-reported early signs of mental illness are associated with specific patterns of brain fiber pathways in young people, even if they may not fulfill criteria for a formal diagnosis or are currently in need of treatment.  (more…)
Author Interviews, Genetic Research, Neurology / 25.01.2018

MedicalResearch.com Interview with: Ona Bloom PhD “Duluth Boat Show - Sea Lamprey Booth” by USFWSmidwest is licensed under CC BY 2.0Associate Professor, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, The Feinstein Institute for Medical Research Associate Professor, Department of Molecular Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell MedicalResearch.com: What is the background for this study? What are the main findings? Response: Scientists have known for years that an ancient species of fish called the lamprey has a remarkable ability to rebuild their spinal cord after it’s been severed. After the lamprey spinal cord is cut, they recover from paralysis to fully swimming again in about twelve weeks, without taking any medicines or other treatments. We are studying the lamprey because we want to know the recipe of molecular ingredients that supports successful recovery after spinal cord injury. The genome of this animal was reported about 5 years ago, in a publication led by my colleagues Dr. Jeramiah Smith at the University of Kentucky and Dr. Weiming Li at Michigan State University.  It turns out that many aspects of the lamprey genome are similar to ours, particularly in the central nervous system. Therefore, we think it is a reasonable expectation that what we learn from lamprey could give us some relevant clues about what might be different about the responses in mammals and other animals that are not good at regenerating their spinal cord. In this study, we found that the expression of many genes in the spinal cord and brain of lampreys change during their recovery from spinal cord injury. Some of the genes that get activated are similar to what happens when our peripheral nervous system is injured, which is better at regenerating than the central nervous system. We also identified that a pathway called the Wnt pathway plays an important role in the regeneration and recovery process. This is a large, complex network of genes that are important in many biological processes, from embryological development in fruit flies to cancer in humans. (more…)
Author Interviews, Genetic Research, JAMA, Neurology, Parkinson's / 25.01.2018

MedicalResearch.com Interview with: Rachel Saunders-Pullman, MD, MPH Associate Professor of Neurology Icahn School of Medicine at Mount Sinai Chief, Movement Disorders, Mount Sinai Beth Israel Co-Director Clinical/Translational Research and Research Mentoring Movement Disorders, Department of Neurology, Mount Sinai Beth Israel New York, NY 10003 MedicalResearch.com: What is the background for this study? What are the main findings?  Response: There is a diversity in causes of Parkinson’s Disease (PD), and this may lead to heterogeneity in drug response. While LRRK2 PD due to G2019S mutations may fully mimic idiopathic PD (IPD), cross-sectional study suggests that the course may be slightly milder than IPD. Further, the pathology is heterogeneous with a minority not demonstrating Lewy bodies, and this may also correspond to less severe non-motor features. To better understand the course of PD associated with the G2019S LRRK2 mutation (the most common LRRK2 mutation), we evaluated motor and cognitive progression in individuals enrolled in the LRRK2 Ashkenazi Jewish Consortium. Subjects were recruited from a Center in Tel Aviv, Israel, Sourasky Medical Center, and from two centers in New York, Columbia University and Mount Sinai Beth Israel. 144 participants were LRRK2 mutation carriers and 401 were not. We utilized all study visits, and constructed linear mixed-effects models to estimate the association between harboring the LRRK2 mutation and rate of change of both motor features- as assessed by the Unified Parkinson’s Disease Rating Scale (UPDRS), and cognition, as measured by the Montreal Cognitive Assessment Scale (MoCA). Models adjusted for sex, site, age, disease duration and (for the motor models) cognitive score. We found a small but significant difference in rate of progression, with LRRK2 PD progressing at 0.69 points/year, and IPD at 1.06 points/year. While the cognitive decline was also less in the LRRK2 PD (-0.10 vs. -0.19 in the IPD, this difference was not statistically different (p=0.08). (more…)
Author Interviews, BMJ, OBGYNE, Probiotics / 24.01.2018

MedicalResearch.com Interview with: “My nightly probiotics to help me :) barely holding back PostOp issues! Very GRATEFUL for them!” by Ashley Steel is licensed under CC BY 2.0Mahsa Nordqvist MD Department of Obstetrics and Gynecology Sahlgrenska University Hospital Gothenburg, Sweden  MedicalResearch.com: What is the background for this study? Response: We have shown in earlier observational studies that there is an association between probiotic intake and lower risk of preterm delivery and preeclampsia. Since pregnancy is a time of rapid change and different exposures can have different effect depending on the time of exposure, we wanted to find out if there is any special time point of consumption that might be of greater importance when it comes to these associations. (more…)
Author Interviews, Endocrinology, JCEM, OBGYNE, Testosterone, UCSD / 24.01.2018

MedicalResearch.com Interview with: Varykina Thackray, Ph.D. Associate Professor of Reproductive Medicine University of California, San Diego MedicalResearch.com: What is the background for this study? What are the main findings? Response: Previous studies have shown that changes in the composition of intestinal microbes (gut microbiome) are associated with metabolic diseases. Since many women with polycystic ovary syndrome (PCOS) have metabolic dysregulation that increases the risk of developing type 2 diabetes and cardiovascular disease, we wondered whether PCOS was associated with changes in the gut microbiome and if these changes were linked to any clinical features of PCOS. We collaborated with Beata Banaszewska and her colleagues at the Poznan University of Medical Sciences in Poznan, Poland to obtain clinical data and fecal samples from 163 premenopausal women recruited for the study. In collaboration with Scott Kelley at San Diego State University, we used 16S ribosomal RNA gene sequencing and bioinformatics analyses to show that the diversity of the gut microbiome was reduced in Polish women with PCOS compared to healthy women and women with polycystic ovaries but no other symptoms of PCOS. The study confirmed findings reported in two other recent studies with smaller cohorts of Caucasian and Han Chinese women. Since many factors could affect the gut microbiome in women with PCOS, regression analysis was used to identify clinical hallmarks that correlated with changes in the gut microbiome. In contrast to body mass index or insulin resistance, hyperandrogenism was associated with changes in the gut microbiome in this cohort of women, suggesting that elevated testosterone may be an important factor in shaping the gut microbiome in women. (more…)
Author Interviews, Pediatrics, Sleep Disorders, Technology / 24.01.2018

MedicalResearch.com Interview with: “social media” by Jessie James is licensed under CC BY 2.0Jean-Philippe Chaput, Ph.D. Associate Professor of Pediatrics, University of Ottawa Research Scientist, Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario Research Institute Ontario, Canada    MedicalResearch.com: What is the background for this study? What are the main findings? Response: No studies to date have examined the association between social media use (e.g., Facebook, Twitter, Instagram) and sleep duration in a representative sample of middle and high school students, who are a vulnerable age group that has reported high levels of social media use and insufficient sleep, writes Buzzoid. Our findings suggest an important association between the use of social media and short sleep duration among student aged 11-20 years. Using social media for at least one hour per day was associated with short sleep duration in a dose-response manner.    (more…)
Author Interviews, JAMA, MD Anderson, Outcomes & Safety, Surgical Research / 24.01.2018

MedicalResearch.com Interview with: Andrew Phillip Loehrer MD MPH Fellow in Surgical Oncology Department The University of Texas MD Anderson Cancer Center MedicalResearch.com: What is the background for this study? What are the main findings?  Response: A growing number of studies have examined the effects of the Affordable Care Act’s Medicaid expansion.  But none to date have looked at effects on surgical conditions, which are both expensive and potentially life-threatening.  We examined data for nearly 300,000 patients who presented to hospitals with common and serious surgical conditions such as appendicitis and aortic aneurysms. We found that expansion of Medicaid coverage was linked to increased insurance coverage for these patients, but even more importantly, Medicaid expansion led patients to come to the hospital earlier before complications set in, and they also received better surgical care once they got there. (more…)
Annals Internal Medicine, Author Interviews, Cannabis, Heart Disease / 24.01.2018

MedicalResearch.com Interview with: Divya Ravi, MD, MPH The Wright Center for Graduate Medical Education Scranton, PA MedicalResearch.com: What is the background for this study? What are the main findings? Response: There is evidence to suggest that Marijuana can bring about changes at the tissue level and has the ability to potentiate vascular disease, in ways similar to tobacco.  With change in legalization and increase usage trends, we conducted this review to examine the known effects of marijuana on cardiovascular outcomes and risk factors, given that cardiovascular disease remains the greatest cause of morbidity and mortality worldwide. Our review found insufficient evidence to draw meaningful conclusions that marijuana use is associated with cardiovascular risk factors and outcomes. The few studies that suggested a possible benefit from marijuana use, were cross-sectional, and were contradicted by more robust longitudinal studies that reported potential harmful effects. (more…)
Author Interviews, Emory, Genetic Research, JAMA, Ophthalmology / 24.01.2018

MedicalResearch.com Interview with: Eldon E. Geisert, PhD Professor of Ophthalmology Emory School of Medicine MedicalResearch.com: What is the background for this study? What are the main findings? Response: In the late 1990s a group of doctors began a study of glaucoma patients to determine if there were phenotypes that are predictive for developing glaucoma. In this Ocular Hypertension Treatment Study (OHTS) one of the highly correlated ocular traits was central corneal thickness (CCT). The early clinical studies found that people with thinner corneas were at a higher risk of developing glaucoma. In two large studies, examining thousands of people a number of genes were identified that were risk factors for glaucoma or that controlled CCT in humans. In both cases the identified genes accounted for less than 10% of the genetic risk for glaucoma and less than for 10% of the genetic control for CCT. There was little data linking the genetic control of CCT to the glaucoma risk. Our group has taken an indirect approach to the question, using well-defined mouse genetic system to identify genes modulating CCT and then interrogating human glaucoma data to determine if these genes are associated with glaucoma risk.   (more…)
Author Interviews, JAMA / 24.01.2018

MedicalResearch.com Interview with: Stelios Serghiou PhD student Epidemiology and Clinical Research and John P.A. Ioannidis, MD, DSc Meta-Research Innovation Center Stanford (METRICS), Stanford University Stanford, California MedicalResearch.com: What is the background for this study? Response: Preprints refer to versions of a manuscript prior to the one published in a peer-reviewed journal. Even though preprints have been very popular in disciplines such as physics and computer science for many years now, their use in biomedicine had been very limited. However, this seems to be changing since the establishment of bioRxiv in 2013. As such, we became interested in exploring what happens to preprints uploaded on bioRxiv and what is the impact of bioRxiv to the peer-reviewed literature in terms of attention received. (more…)