AlzheimersDiseaseRyantriplettnew.ppt

1、Alzheimers Disease,By: Ryan Triplett,Alzheimers,The deterioration of intellectual capabilities, memory, judgment, and personality to the extent that daily functioning and quality of life are seriously impaired. Generally occurs in the elderly impairing brain function, which can lead to dementia. Nam

2、ed for German neurologist Alois Alzheimer in 1907.,Statistics,4 million or more cases in U.S. 100,000 die each year. 4th major leading cause of death in U.S. 65 or older when symptoms can begin,Clinical Features,Loss of short-term memory and ability to create memories Concentration on past Loss of t

3、ime Communication diminishes Personality changes Delusions Become immobilized and uncomprehending Death due to respiratory failure 65 and up disease lasts 8-20 years 65 and down disease lasts 5-10 years disease more rapid,Histological Analysis3 distinctive neuropathological features,Devastating loss

4、es of synapses and neurons within hippocampus and entorhinal cortex. Dense spherical structures, called senile plaques (SP), prevalent outside the neurons of the hippocampus and other regions of the brain. Aggregations of fibrils (Neurofibrillary tangles, NFT) accumulate within cell bodies and dendr

5、itic processes of the neurons of the hippocampus, neurocortex, entorhinal cortex, and other brain parts.,Pictures of Brain Degradation,Degradation contd,Senile Plaques,Densely packed fibrous structures called amyloid bodies. Consists of mainly protein, 4-kDa peptide. Many isoforms make up the amyloi

6、d proteins. Amyloid precursor protein another source of which can lead to AD. Functional role unknown.,Neurofibrillary Tangles,Consist of helical filaments called PHF. Intertwined protein strands made of tau protein molecules. Formation of NFTs not unique to AD. Found in many other neurodegenerative

7、 disorders with dementias, affecting the brain. Scientists believe that the amyloid proteins lead to the formation of the neurofibrillary tangles, and both can lead to AD symptoms.,Diagnosis,Only definitive way is to use brain scans (CT) to see plaques or tangles in brain tissue. Tests used to exclu

8、de other diseases.,Treatments,No treatment can prevent Alzheimers Drugs for early stages Cognax, Aricept, Exelon, or Razadyne Severe stages Memantine (Namenda) Medicines used to control symptoms, allow caregivers to provide easier care.,Research,Neuroimaging Finding damaged parts of the brain Alzheimers Genetics Anti-oxidants Ginkgo biloba Using to stimulate memory Estrogen Tested for levels found in AD patients, which are women,References,Pasternak, J. Jack. Introduction to Mo