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Brain Aging Dementia & management
A.Dean Sherzai MD, MAS, PhD(c)
Director of Loma Linda Memory and Aging Center
Director of Loma Linda University Neurology Research Program
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Normal Aging
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CENTENARIANS
1900 – RARE
1982 – 32,000
1998 – 61,000
2050 – 600,000
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SUPER-CENTENARIANS
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Active Aging
Artists: Picasso > 90 T. Vecellio (Titian) > 90 Michelangelo sculpted at 89
Composers: Verdi wrote Falstaff at 84
Scientists: Galileo > 70 Linus Pauling > 80
Performers: Martha Graham danced till 75choreographed @
95 Artur Rubinstein last recital at 93
Writers: too numerous to mention ...
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Definitions
• Normal Brain Aging• Mild Cognitive Impairment• Dementia
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Aging, memory and intellect
• Speed of memory retrieval
• Speed of processing• Multi-tasking ability• Memory-formation
efficiency
Verbal IQ
Vocabulary
Store of information
Comprehension
DecreaseDon’t change
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Common Cognitive Complaints
in Normal AdultsSituation Percentage of elderly
Names 83 %
Where I put things 60 %
Knowing I have told someone 49 % something
Forgetting a task after starting 41 %
Losing the thread of conversation 40 %
From: Boller et al, Arch Neurol 1991
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Brain Changes With Aging
• Brain weight:
– Decreases by about 0.5% per year after age 30
• Neuron loss:
– Region-specific
– 10-25% loss in cerebellum, cortex, hippocampus, substantia nigra, Frontal Lobe
• Loss of synapses (connections between neurons)
• Mild degree of Alzheimer-type pathology
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Causes of Memory Changes in Aging
• Normal aging *
• Neurodegenerative diseases / Alzheimer’s disease
• Medications
• Alcohol
• Depression
• Anxiety
• Head trauma
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Variability of Aging depends on:
• Heredity:– Presence of longevity genes– Absence of disease genes
• Lifestyle:– Diet– Body weight– Exercise
• Luck:– Avoiding disease and trauma
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Alzheimer’s disease
Mild CognitiveImpairment
Normal AgingNormal Aging
No change over time
Other dementias
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• Variable defintion• Originally defined as a memory only syndrome• Defined loosely -include memory and cognitive
problems, yet normal ability to do ADLs• Conversion to AD at a rate of about 10-15%/year• Normal elderly – 1-2% per year• The non- memory types are those at risk for other
types of dementia
Mild Cognitive Impairment
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Why is identifying at MCI stage important?
• Study the conversion of MCI to AD– Intervene with drugs– Predict who is at the greatest risk for
developing the disease
• It appears that intervention at the MCI stage may be more effective
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What is Dementia?Loss of memory and
other intellectual abilities serious enough to interfere with daily life
Alzheimer’s is most common form of dementia
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TYPES OF DEMENTIA• Degenerative • Non degenerative
‣ Vascular Dementia
‣ Bacterial/Viral infections
‣Syphilis, cryptococcus, Lyme Dz., Whipple’s Dz., HIV/AIDS, SSPE, PML, ect.
‣ Prion disease (e.g., CJS)
‣ Neoplasia (brain tumors, carcinomatos meningitis, paraneoplastic synd.)
‣ Vitamin deficiency (e.g., Pellegra, B12 deficiency)
‣ Endocrine deficiencies (e.g., Thyroid dz., Hashimoto’s encephalitis, Cushing’s)
‣ Cerebral trauma (SDH, Concussions)
‣ Toxins (Alcohol, drugs, heavy metals)
‣ Others: NPH, Hydrocephalus, MS, Dialysis, Depression, TBI
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Degenerative Diseases
• Alzheimer’s disease (>60%)• Lewy Body Disease (20%)• FTLD (2-5%)• Parkinson’s disease and Dementia (PDD)• Huntington’s • PSP• Some others: CBGD, Kearns-Sayre,
Hallervorden-Spatz, Wilson’s dz, etc.
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AD Statistics….
• Most common cause of dementia among people age 65 and older.
• 5.3 million people now have AD.
• 1 out of 8 over 65; 1 out of 2 over 85
• For every 5-year age group beyond 65, the percentage of people with AD doubles.
What is AD?
• By 2050, 13.2 million older Americans are expected to have AD if the current numbers hold and no preventive treatments become available.
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Once considered a rare disorder, Alzheimer’s disease is now seen as a major public health problem that is seriously affecting millions of older Americans and their families.
Impact of AD
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The Changing Brain in Alzheimer’s Disease
No one knows what causes AD to begin, but we do know a lot about what happens in the brain once AD takes hold.
Pet Scan of Normal Brain
Pet Scan of Alzheimer’s Disease Brain
AD and the Brain
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Medial Temporal Lobe
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Plaques and Tangles: The Hallmarks of AD
The brains of people with AD have an abundance of two abnormal structures:
An actual AD plaque An actual AD tangle
• beta-amyloid plaques, which are dense deposits of protein and cellular material that accumulate outside and around nerve cells
• neurofibrillary tangles, which are twisted fibers that build up inside the nerve cell
AD and the Brain
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Beta-amyloid Plaques
Amyloid precursor protein (APP) is the precursor to amyloid plaque.
1. APP sticks through the neuron membrane.
2. Enzymes cut the APP into fragments of protein, including beta-amyloid.
3. Beta-amyloid fragments come together in clumps to form plaques.
1.
2.
3.
AD and the Brain
In AD, many of these clumps form, disrupting the work of neurons. This affects the hippocampus and other areas of the cerebral cortex.
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Ultimately the brain Shrinks
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? Protective factors? Protective factorsNSAID useNSAID useEstrogen useEstrogen useStatinsStatinsAnti-oxidantsAnti-oxidantsExerciseExerciseDietDietMental activityMental activityPsychosocial Psychosocial
factorsfactors
Risk factors for AD
• Major Risks• Age • Family history• Genes (Apo E
4, others)
• Minor Risks• Head trauma• Low education• Female sex
• Major Risks• Age • Family history• Genes (Apo E
4, others)
• Minor Risks• Head trauma• Low education• Female sex
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Genetics of AD
• Genetic component (present in <10%)– ApoE4: stratifies risk of development, no
guarantee– Presenilin 1 (most common) and 2– Amyloid Precursor protein (chr.21)– Alpha 2 macroglobulin – all generally increase risk for early onset
AD– More genes are being discovered
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Warning Signs
• Memory changes that disrupt daily life
• Challenges in planning or solving problems
• Difficult completing familiar tasks• Confusion with time or place• Trouble understanding visual
images and spatial relationships
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Warning Signs (cont.)
• New problems with words• Misplacing things and losing ability
to retrace steps• Decreased or poor judgement• Withdrawal from work or social
activities• Changes in mood and personality
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Evaluation
• Informant history• MMSE (Folstein) & other
Neuropsycholgical testing• Imaging• Activities of daily living (ADLs)• Medical history
– Medication– Comorbidities
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AD Research: Diagnosing AD
Experienced physicians in specialized AD centers can now diagnose AD with > 90% accuracy. Early diagnosis has advantages:
• Doctors can rule out other conditions that may cause dementia.
• If it is AD, families have more time to plan for the future.
• Treatments can start earlier, when they may be more effective.
• It helps scientists learn more about the causes and development of AD.
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Imaging
• SPECT• Structural MRI / Volumetrics• Functional MRI• PET • PIB
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Structural imaging MRI
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Functional MRI
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PET Scan
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Positive PIB PET
MCI
Negitive PIB PET
MCI Non-progressor
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CSF and Peripheral Biomarkers
• A Beta 42 (A beta Amyloid 1-42)• T-tau (total Tau)• P-Tau (phosphorylated tau)• Others to be validated
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Treatments for Alzheimer’s Disease
Cholesterase Inhibitors
• Donepezil (Aricept) (5mg, 10mg, 23mg)
• Rivastigmine (Exelon) (1.5mg x2, 3.0mg x2, 4.5mg x2, 6mg x2)
• Rivastigmine Patch (Exelon patch) (4.6mg x2, 9.5mg x2)
• Galantamine (Razadyne) (4mg x2, 8mg x2, 12mg x2)
NMDA Receptor Antagonist
• Mentantine (Namenda) (10mg x2)
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Treatment Benefits
• Individuals performed better on tests of memory and thinking
• May delay or slow worsening of symptoms for about 6 – 12 months
• People with moderate to severe AD may benefit slightly from taking memantine too
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Issues in subjects with Dementia
• Behavioral issues
• Hallucinations
• Sleep problems
• Diminished appetite
• Difficulty swallowing
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Behavioral Problems
• Very Common & Recurrent
• Different manifestations
– Active vs. Passive
– Severity
– Situational vs. Pervasive
• Many sources and causes
• Often related to Communication issues
• Adverse consequences
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Consequences of Untreated behavioral problems
• Excess disability / disproportional presentation
• Elevated caregiver depression & burder
• Increased service utilization
• Increased risk of institutionalization
• Lower quality of life
• Risk of harm to person or others
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Underlying causes
• Unmet needs, and frustrations (emotional & physical)
• Environmental issues
– cold/ warm
– noise
• Biological issues
– other disease process
– degenerative process
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ABC model
• Antecedents -Behaviors-Consequences
• first describe the behavior well
• Identify the antecedents and triggers
• specify consequences / outcome responses
• develop an action plan according to the person and environment
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Treatment
• What should not be done
– Argue and or convince
– Negative emotions from care giver
• What is useful
– Redirecting
– Distracting
• Drug Treatment
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Primay Approach to Behavioral problesm
• Proactive assessment (NPI)
• Family psychoeducation
• Caregiver support & referral (e.g. AA)
• ABC approach
– behavioral 1st then Pharmaceutical
• Develop & document plan and goals
• follow up and change plan regularly
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Scientists examine characteristics, lifestyles, and disease rates of groups of people to gather clues about possible causes of AD. The NIA is currently funding epidemiologic studies in a variety of different groups. Two of the studies focus on religious communities. Researchers conduct yearly exams of physical and mental status, and studies of donated brains at autopsy. Some early results indicate:
• Mentally stimulating activity protects the brain in some ways.
• In early life, higher skills in grammar and density of ideas are associated with protection against AD in late life.
Epidemiologic Studies
AD Research: the Search for Causes
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Clinical trials are the primary way that researchers find out if a promising treatment is safe and effective.
• Trials examine approved drugs to see if they can be used for other purposes, or look at experimental drugs.
• Participating in a trial means regular contact with the study team, who can provide state-of-the-art AD care.
AD Research: Clinical Trials
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Researchers also are looking at other treatments, including:
• vaccine against AD.
• cholesterol-lowering drugs called statins• anti-oxidants (vitamins) and folic acid• anti-inflammatory drugs• substances that prevent formation of
beta-amyloid plaques• nerve growth factor to keep neurons
healthy
AD Research: the Search for New Treatments
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Research at Loma Linda University
• Looking at the influence of Diet and lifestyle on development of neurodegenerative diseases (Dementia, PD, etc), and Stroke
• Community based approach to aging research and aging support
• Novel Imaging approaches to early detection of Dementia
• Clinical trials
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Why early diagnosis & follow-up is important
• Major cause for mortality and morbidity is late treatment of behavioral disorder
• Early identification means – Behavioral and enviromental measures work– Can start with milder drugs– Can control the progression and treatment– Not forced into high doses of strong
medications– Not forced into early irreversible decisions
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Alzheimer’s Association• Local chapters provide referrals to
area resources and services, and sponsor the Safe Return Program, support groups, and educational programs:
1-800-272-3900www.alz.org
National Support for Caregivers
Eldercare Locator• Nationwide service of the Federal
Government helps caregivers locate local support and resources:
1-800-677-1116www.eldercare.gov
Slide 40
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National Institute on Aging, part of the
National Institutes of Health (NIH), part of the
Department of Health and Human Services
The ADEAR Center is a service of:
For more information on Alzheimer’s disease and a list of the NIA-funded Alzheimer’s Disease Centers,
contact the Alzheimer’s Disease Education and Referral (ADEAR) Center at:
This PowerPoint slideshow is based on the publication Alzheimer’s Disease: Unraveling the Mystery. Contact the ADEAR Center for free copies.
1-800-438-4380 www.alzheimers.org
Slide 41
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USE IT OR LOSE IT!
• Don’t be a couch potato– Socially active, verbally active
• Keep healthy habits– Good nutrition, mild exercise, take your
medicines and don’t sweat the small stuff!
• Life-long learning = long-life living– Mentally active- “Use it or lose it!”– (e.g. Keep going to educational lectures)
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Loma Linda University Memory Disorders Clinic
• Focus– Accurate and early diagnosis– Treatment– Potential Prevention – Research
• Outreach to patients, their families, and community
• QOL programs
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MEMORY DISORDERS CLINIC
LomaLindaMemory.org (under construction)
LOMA LINDA UNIVERSITY
Faculty Medical Offices
11370 Anderson ave B100
Appointments: 909-558-2880
Messages: 909-558-2233
Fax: 909-558-2237
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Thank you!
Questions?