Overview of Alzheimers Research Roberto Fernandez MD, MPH,

Overview of Alzheimers Research Roberto Fernandez MD, MPH, PhD Medical Director The Pat Summitt Clinic Brain and Spine Institute University of Tennessee Medical Center 1 Overview

Normal brain structure and function Alzheimers pathology - What we know Alzheimers pathology - What we don't know The scope of research Clinical Trials in Alzheimers disease Clinical research at the Pat Summitt Clinic Brain Function Motor function Spoken language

Attention Planning Making Choices Suppression of unwanted behaviors Sensation Visuospatial function Integration of different Sensory systems Primary visual processing

Language comprehension Visual recognition Auditory processing Memory Behavior 3 Normal Brain Structure and Function Image: http://www.nia.nih.gov Image: www.martinos.org/neurorecovery/images/tracts.png 4

Alzheimers Pathology. What we know Not all brain regions are affected equally or at the same time Some areas are more vulnerable Hallmark changes are first seen in medial temporal lobes

Images: www.alz.org 5 Beta Amyloid Plaques Image: https://commons.wikimedia.org/ Image: wiki.brown.edu

Amyloid is a naturally occurring protein Formed from by cleavage of amyloid precursor protein Beta-amyloid has tendency to aggregate forming plaques Plaques formation is potentially toxic to neurons 6 Tau and Neurofibrillary Tangles Normal tau protein changes configuration and forms clumps, called neurofibrillary tangles, cause cell dysfunction and eventually cell death. 7 Loss of function and disease progression

X X X Loss of connections among brain cells and functional networks result in loss of function (memory, language, etc) and may contribute to spread of disease and cause further injury. 8 Disease Progression Progression of disease leads to

inflammation, cell injury, cell death and brain atrophy. Images: www.alz.org 9 Alzheimers Pathology: What We Don't Know What causes the changes in amyloid and tau Why individuals with amyloid burden may not develop AD Why are some parts of the brain more vulnerable than

others Why are there different variants of disease How does disease spread across brain regions What is the relationship with aging Whats the role of loss of connections between brain regions 10 The Scope of Biomedical Research Basic Research Molecular Animal Models Human subjects

Images: http: npr.org Images: http://www.lpzoo.org/ The Scope of Biomedical Research Symptomatic Drug Trials Clinical Research Disease Modifying Epidemiology

Preventive Genetics Imaging/EEG Diagnostics Labs Other Interventions

Cognitive 12 Clinical Trials Clinical Trials A clinical research study is a scientific investigation designed to answer important questions about a specific intervention: Is it safe?

Does it work? Which dose works best? What are the side effects? 13 Clinical Trials Progression of Clinical Trials Phase I: Tests new drug or treatment in a small group of people to assess safety, safe dose range, and identify side effects Phase II: Tests safety and/or efficacy Phase III: Studies conducted in large groups to confirm effectiveness, monitor side effects and compare to

standard treatments 14 Clinical Trials Study Design Most trials are double blinded placebo-control trials Some may be open label Some have open label extensions after completion of blinded portion of the study Most have strict inclusion criteria Duration, frequency of visits and procedures (e.g. tests) varies depending on protocol Close monitoring for possible side effects

15 Clinical Trials When considering a clinical trial: Know your rights Do not feel obligated to participate

You can decide to stop at any time Make sure you inform yourself about research evidence backing the study It is OK to ask for second opinion Make sure you review and understand the informed consent. Dont be afraid to ask questions Make sure trial is conducted by a reputable institution All research with human subjects must be conducted by entities who have an Institutional Review Board (IRB) Be aware that food supplements and natural products may not be regulated in the same manner as therapeutic drugs, but may still have risks and possible side effects 16

Current Therapeutic Research in Alzheimers There are currently no approved medications that can cure, slow down or revert Alzheimers Approved medications are intended to treat symptoms and may provide temporary improvement Experimental drugs target know mechanism of disease through different approaches: Beta-amyloid: Antibodies that help clear plaques, prevent aggregation or block enzymes involved in amyloid formation Neurofibrillary tangles: Vaccine that stimulates the bodys immune system to attack an abnormal form of tau protein that destabilizes the structure of neurons Inflammatory response: Drugs that can modulate inflammation

Neuronal network dysregulation: Anti-epileptic drugs to modulate possible hyperexcitability of brain cells Neurotransmitter function 17 Monoclonal Antibodies Selective for aggregated betaamyloid Bind to amyloid plaques Signal to immune cells that then recognize plaque and remove it Images: www.alz.org

18 Clinical research at the Pat Summitt Clinic ENGAGE Clinical Trial Study evaluating the efficacy and safety of an investigational drug in people experiencing symptoms of early Alzheimers disease. It is intended for preclinical Alzheimers, also known as mild cognitive impairment Study drug is aducanumab, a monoclonal antibody Prior studies showed statistically significant reduction in plaque and slowing of cognitive decline Aim to determine whether the investigational drug can remove the plaques and have an effect on the slowing of the progression of

the condition Infrequent but potentially serious adverse events have been associated with this medication. These include brain swelling and 19 brain bleeds. ENGAGE Clinical Trial Approximately 1350 people with symptoms of early Alzheimers disease will take part in this study around the world. Two phases: a placebo-controlled phase, and an optional long-term extension phase. Placebo-Control phase: two-in-three chance of receiving investigational drug. This phase lasts 2 years Long-Term phase: All participants will receive the drug for 2 years

Participants who meet eligible requirements will visit the clinic once or twice per month During placebo- controlled phase, participants will receive either the investigational drug or placebo every 4 weeks for approximately 18 months (1.5 years). 20 You may qualify for the study if: You are 5085 years of age You are experiencing symptoms that might be related to early Alzheimers disease, such as problems with memory or thinking clearly You have someone who can be your study partner (accompany you to certain appointments and provide

information about your health). 21 Clinical Research at the Pat Summitt Clinic Visuospatial Impairments in Alzheimers Disease (AD) Up to 1/3 of AD begins with visuospatial symptoms

Associated with posterior cortical atrophy Disabling because it undermines independent living 22 Brain Areas for Visuospatial Orientation and Alzheimers disease

Dorsal Where? Ventral What? 23 Optic Flow The visual motion seen during self movement Alzheimers can impair optic flow perception, leading to disorientation 24

Brain responses to it can be measured with EEG 25 Brainwaves evoked by optic flow can differentiate early stage Alzheimers from normal aging. 26 Optic flow responses are associated with poor driving performance and

atrophy of specific brain regions that are affected in Alzheimers 27 Current Research To establish the parameters of OF-ERP components that will reliably differentiate normal aging from Alzheimers for early diagnosis and monitoring of disease progression Elucidate mechanism of Alzheimers disease that are poorly understood

Evaluate optic flow brain responses as objective predictors of driving capacity 28 Thank You

Recently Viewed Presentations

  • Title

    Title

    on impacts, vulnerability and adaptation to climate change agreed on additional activities (webinars) in areas of ecosystems, human settlements, water resources, health, including timing of implementation of such activities; also request to better link NWP with Adaptation
  • Theories in Human Development

    Theories in Human Development

    Theories of Human Development. A developmental theory is a systematic statement of principles and generalizations that provides a framework for understanding how and why people change as they grow older.
  • 3D Space Perception (aka Depth Perception) 3D Space

    3D Space Perception (aka Depth Perception) 3D Space

    Motion Parallax. Motion parallax occurs when an observer fixates a point at intermediate distance and then rotates their head. ... the depth range in front of and behind the horopter within which an object is visually fused and capable of...
  • ATIA Member Meeting Chicago

    ATIA Member Meeting Chicago

    Light box should emit reduced UV light. ... Users rate their moods by swiping a small bar to the left or to the right. The ratings are displayed on graphs to help users track their moods over time. Notes can...
  • PowerPoint 프레젠테이션

    PowerPoint 프레젠테이션

    APL ZRM TLL SPM CRM BAL STL SHL CPL STS 강의 제조공정 및 요소기술 정정 Slab 가열로 조압연 사상압연 열간교정 전단 Plate 소둔산세 후판 Bloom 가열로 조압연 사상압연 전단 강편 선재압연 강편,선재 STS 강의 제조공정 및 요소기술 STS ...
  • Modernisering van de geneeskundige controle

    Modernisering van de geneeskundige controle

    71020034000 de rijcker piet. 61068230115 58021403303 de rijcker piet. kabamba lukoji robert. 43574675408 57011442172 kabamba lukoji robert. ... croix jaune-blanche/wit-geel kruis. jamoulle marc. 15324119004 47030417138 jamoulle marc. vanderborght luc. 38503654001 62030347381 vanderborght luc.
  • Running the Race to Mediocrity

    Running the Race to Mediocrity

    Inclusion on the 6th Annual AP District Honor Roll is based on the examination of three years of AP data, from 2013 to 2015, for the following criteria:. Increased participation/access to AP by at least 4 percent in large districts,...
  • Delta Sigma Theta Sorority, Inc. Cincinnati Alumnae Chapter

    Delta Sigma Theta Sorority, Inc. Cincinnati Alumnae Chapter

    Violets to all for continuing to share your unique gifts and amazing spirit to accomplish the work of CACDST. See our April updates below. Ways & Means Committee: Soror Lisa Rowell Third Annual Golf Outing - May 17, 2008 at...