Alzheimer's - Dementia, Author Interviews, Biomarkers, JAMA, MRI / 22.05.2023
Alzheimer’s Disease: Study Finds tau-PET Imaging Increases Diagnostic Accuracy
MedicalResearch.com Interview with:
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Dr. Smith[/caption]
Ruben Smith MD, PhD
Associate professor at Clinical Memory Research
Division of Neurology
Lund University
MedicalResearch.com: What is the background for this study?
Response: Since a few years it has become possible to visualize tau pathology in Alzheimer’s Disease (AD) using positron emission tomography (PET). The tau-PET radiotracer Flortaucipir (Tauvid) was recently approved by the US Food and Drug Administration as an AD diagnostic tool. Since PET imaging is costly and exposes the patient to radioactivity we wanted to study the added clinical value of tau-PET in the diagnostic work-up of patients with cognitive symptoms, before widespread implementation in clinical practice.
Dr. Smith[/caption]
Ruben Smith MD, PhD
Associate professor at Clinical Memory Research
Division of Neurology
Lund University
MedicalResearch.com: What is the background for this study?
Response: Since a few years it has become possible to visualize tau pathology in Alzheimer’s Disease (AD) using positron emission tomography (PET). The tau-PET radiotracer Flortaucipir (Tauvid) was recently approved by the US Food and Drug Administration as an AD diagnostic tool. Since PET imaging is costly and exposes the patient to radioactivity we wanted to study the added clinical value of tau-PET in the diagnostic work-up of patients with cognitive symptoms, before widespread implementation in clinical practice.
Dr. Finn[/caption]
Aloke V. Finn MD
Medical Director/Chief Scientific Officer
CVPath Institute Inc.
Gaithersburg, MD 20878
MedicalResearch.com: What is the background for this study?
Response:Transcatheter left atrial appendageal closure (LAAC) has become an established therapeutic approach for prevention of stroke in subjects with non-valvular atrial fibrillation who are ineligible for long-term oral anticoagulation. Device-related thrombus (DRT), developing after LAAO procedures occurs in a small proportion but patients receiving these devices but is associated with critical embolic events such as ischemic stroke. Thrombogenicity and delayed endothelialization of fabric play a role in the development of DRT. Fluorinated polymers are known to have thromboresistant properties which may favorably modify blood biomaterial interactions of a LAAO device.
In this study we compared the thrombogenicity and endothelial coverage (EC) after left atrial appendage occlusion (LAAO) between a novel fluoropolymer-coated Watchman (FP-WM (Watchman FLX PRO) and the conventional uncoated Watchman FLX (WM).
Julia Cave Arbanas[/caption]
Julia Cave Arbanas
Project Manager and
Prof. Dubinsky[/caption]
Marla Dubinsky, M.D.
Professor of Pediatrics and Medicine
Co-director of the Susan and Leonard Feinstein IBD Clinical Center
Chief of the Division of Pediatric Gastroenterology and Nutrition
Icahn School of Medicine at Mount Sinai
MedicalResearch.com: What is the background for this study? How does MIRIKIZUMAB differ from other medications for UC?
Response: This is a phase 2 study to assess the PK (pharamcokinetics), safety and efficacy of mirikizumab in pediatric ulcerative colitis (UC).
Dr. Zirwas[/caption]
Matthew Zirwas, MD
Founder, Bexley Dermatology Research Clinic
Bexley, OH 43209
MedicalResearch.com: What is the background for this study? How does Roflumilast differ from other treatments for seb derm?
Response: Seborrheic dermatitis affects up to 5% of the population globally and can have major impacts on quality of life. Treatment regimens are often complicated given the association of seborrheic dermatitis to hair bearing areas of the body, requiring multiple treatments for different parts of the body. Our phase 2 study aimed to understand the efficacy and safety of once-daily roflumilast foam 0.3% in adults with seborrheic dermatitis on their scalp, face and trunk. Roflumilast foam is a selective and highly potent phosphodiesterase (PDE) 4 inhibition that is being studied for a range of inflammatory skin conditions.
Dr. Greenhawt[/caption]
Matthew Greenhawt, MD, MBA, MSc
Professor of Pediatrics
Section of Allergy and Immunology
Director, Food Challenge and Research Unit
Children’s Hospital Colorado
University of Colorado School of Medicine
Anschutz Medical Campus
Dr. Ruiz[/caption]
John M. Ruiz, Ph.D
Associate Professor of Clinical Psychology
Department of Psychology
University of Arizona
Dr. Ruiz is the incoming editor-in-chief of the American Psychological Association (APA) journal, Health Psychology
Dr. Ruiz joined the U.S. Preventive Services Task Force in January 2022
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Skin cancer is the most common type of cancer in the United States, but it often does not cause serious complications or death. The Task Force’s recommendation on screening for skin cancer focuses on the effectiveness of visual skin exams for children and adults who do not have any symptoms. When reviewing the latest research, we found that there is currently not enough evidence to tell us whether or not screening people without signs or symptoms is beneficial. This is an I statement.
Ridge Maxson[/caption]
Ridge Maxson
M.D. Candidate, Class of 2024
Johns Hopkins University School of Medicine
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Dog walking is an increasingly popular mode of physical activity for adults in the US, but its injury burden and associated risk factors are not fully understood. This study found that the 3 most common injuries sustained by adult dog walkers in the US were finger fracture, TBI, and shoulder sprain or strain. Dog walking-related injuries sent approximately 423,000 adults to US EDs between 2001 and 2020, with an annual average of more than 21,000 visits. During that 20-year period, the estimated annual injury incidence increased by more than 4-fold. Among injured dog walkers, older adults and women were particularly vulnerable to serious injury, such as fracture and TBI.
Dr. Fallah[/caption]
Mahdi Fallah, MD, PhD
Dr. Stephens[/caption]
Dr Jacqueline Stephens MPH, PhD
Epidemiologist & Senior lecturer
Flinders University
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: An increase in the volume of evidence published in the peer-reviewed literature on this topic prompted an update of this Cochrane Review.
Dr. Gandhi[/caption]
Manoj Gandhi, MD PhD
Senior Medical Director of Genetic Testing Services,
Response: We were broadly interested in discovering instances of bacterial genes that have been acquired by diverse animal genomes over millions of years of evolution by the process of horizontal gene transfer (HGT). Since these events are quite rare and most previous discoveries have been serendipitous, we developed computational methods to identify genes acquired by HGT in animals. One of the exciting discoveries from our work was that vertebrate IRBP appeared to have originated in bacteria and is now a critical component of the vertebrate visual cycle, so this paper focuses on that one discovery.
IRBP or interphotoreceptor retinoid binding protein is an important protein present in the space between two major cell types in our eyes, photoreceptor cells and RPE cells. Our ability to see involves an intricate set of steps where light is first sensed by causing a change (isomerization) in the chemical structure of molecules in the eye called retinoids. This sensing of light occurs in our photoreceptor cells. Following this change in the chemical structure, the retinoid needs to be recycled back to the chemical structure that can again sense light. This recycling occurs in RPE cells. IRBP performs the essential function of shuttling retinoids between the photoreceptors and the RPE cells, which allows the cycle of sensing and regeneration to work. Supporting its importance, mutations in IRBP (also known as retinol binding protein 3 or RBP3) can cause several severe human eye diseases.
Larissa K. Samuelson, PhD
Professor
Developmental Dynamics Lab
School of Psychology; UK 14th for Research Quality
Psychology, Psychiatry, and Neuroscience
University of East Anglia, United Kingdom
MedicalResearch.com: What is the background for this study?
Response: Words direct the attention of infants, children and adults to mentioned objects in the environment. When someone says “Can you find the candy,” you look to the candy sitting on the counter. This fact is the basis of many tests of infant cognition in laboratories. To find out if a child knows the word “bike” we put a picture of a bike and a truck on a TV screen, say the word “bike” and see if they look at the correct object.
There is also evidence that words can direct attention even if you don’t know what they mean yet. For example, in studies of learning in the lab novel made up words like “modi” can direct children’s attention to specific features of objects. One particular example of this is the “shape bias”. If a two-year-old is shown a novel object and told a novel name, for example “This is my blicket,” and then asked, “Can you get your blicket” and shown one object that matches the named one in shape and another that is made from the same material, they will attend to the one that matches in shape. Researchers think the naming event “This is my…” cues children to look at things that are the same shape because they already know many names for things in sets that are similar in shape; cups are all cup-shaped, keys are all key-shaped, spoons are all spoon-shaped, etc.
Prior research suggests there may be differences in the way children who struggle with language decide what a new word means. For example, children with Developmental Language Disorder do not pay attention to the same things when learning new words as children with typical language development. These children do not look to an object that matches a named exemplar in shape when asked to “get your blicket”. But you can’t diagnose children with DLD until they are 3 or 4. We want to see if we can identify these children earlier, so they can get early support.
Edward Liu[/caption]
Edward Liu, BA
Second year medical student
Department of Medical Education
Geisinger Commonwealth School of Medicine
Scranton, PA
Medicalresearch.com: What is the background for this study?
Response: The United States’ opioid epidemic continues to rise because of increasing opioid use and availability, contributing to prescription opioid misuse, mortality, and rising cost.1 The worsening health and economic impact of opioid use disorder in the US warrants further attention on the adverse effects and distribution pattern of commonly prescribed opioids like oxycodone (OxyContin), fentanyl (Duragesic), and morphine (MS-Contin). Using the Automated Reports and Consolidated Ordering System (ARCOS) database,2 a comprehensive data collection system of pharmacies and hospitals distribution of Schedule II and III controlled substances in the US with the FDA Adverse Event Reporting System (FAERS)3 has never been done before. This approach may provide a more complete picture of the risks of prescription opioids which can include drowsiness, nausea, and potentially fatal respiratory depression.