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What you might do to try to prevent and/or treat
Alzheimer's Disease
2/20/2003: 3-D Images
Show How Alzheimer's Engulfs Brain
- Science
Daily
2/20/2003: Neuroscientists Map How
Alzheimer's Disease Systematically and Sequentially Engulfs the
Brain - Science
Quest
2/20/2003: Alzheimer
Patients Who Scored Well on Memory Tests -- Show Unique Compensatory Brain
Activity - Science
Quest
2/18/2003: Scans Show
Dramatic Brain Cell Loss in Alzheimer's - ABC
2/17/2003: Alzheimer
Patients Who Scored Well On Memory Tests Show Unique Compensatory Brain
Activity - Science
Daily
2/16/2003: Mobile phones 'may trigger
Alzheimer's' -
BBC
2/11/2003: New
finding could help fight Alzheimer's disease - Nando
Times
2/1/2003:Gene
variation traced to greater risk for Alzheimer's - Nando
Times
1/21/2003: New Ideas Energize
Alzheimer's Battle - NY
Times
1/21/2003: Graphic: Proteins
That Help the Brain, and Hurt It - NY
Times
1/21/2003: Forum: Discuss the
Latest Alzheimer's Research - NY
Times
1/14/2003: Lowering
Beta-Amyloid Levels In Blood To Treatment Alzheimer's - Science
Daily
11/25/2002: Drinking
Wine May Decrease Risk of Dementia - ABC
11/22/2002: Alzheimer's treatment
makes mice brains bleed -
Nature
11/22/2002: Study
links Alzheimer's vaccine to higher stroke risk - Nando
Times
11/18/2002: Wine protects against
dementia -
BBC
11/15/2002: Mothers 'get Alzheimers
boost' -
BBC
11/10/2002: Seeing Into
The Alzheimer's Brain: Researchers Say PET Scans Can Help
Diagnosis, Treatment - Science
Daily
11/5/2002: New
treatment said to block Alzheimer's in mice - Nando
Times
11/4/2002:Imaging
Early Alzheimer Disease - Science
Quest
11/4/2002: Tobacco chemical blamed for
disease -
BBC
11/3/2002: Study
suggests estrogen could worsen Alzheimer's - Nando
Times
11/2/2002: Memory Training May Help
Some Alzheimer's Patients in the Early Stages of the Disease - Science
Quest
11/2/2002: Long-Term Estrogen
Replacement Therapy in Postmenopausal Women With Alzheimer's Disease May Worsen
Memory Loss - Science
Quest
11/1/2002: Brain food -
BBC
11/1/2002: Eating Fish
Once a Week Cuts Dementia Risk - ABC
10/29/2002: Immune system 'triggers
Alzheimer's' -
BBC
10/28/2002: Alzheimer's
vaccine may be safe for humans, study says - Nando
Times
10/27/2002: New
Strategy May Protect Brain Against Stroke, Parkinson's And Alzheimer's - Science
Daily
10/25/2002: Researchers
consider refining experimental Alzheimer's vaccine - Nando
Times
10/23/2002: More
adults caring for elderly parents with dementia - Nando
Ti
10/22/2002: Curry 'may treat
radiation burns' -
BBC
10/22/2002: Curry 'may slow
Alzheimer's' -
BBC
10/19/2002: Moderately
High Homocysteine Tied To Stroke, Alzheimer’s Risk - Science
Daily
10/10/2002: Electronic tagging for
Alzheimer's -
BBC
10/8/2002: Common Spice May Protect
Skin During Radiation Therapy For Cancer - Science
Daily
10/7/2002: Study
suggests aspirin reduces Alzheimer's risk - Nando
Times
10/7/2002: Growing
Evidence That Commonly Used Medicines May Delay Or Prevent Alzheimer’s
Disease - Science
Daily
10/6/2002: Hi-tech memories for
Alzheimer's -
BBC
10/5/2002: Antipsychotic
Drug Has Few Side Effects In Alzheimer's Patients - Science
Daily
10/4/2002: Alzheimer's
Disease May Originate In The Brain's White Matter - Science
Daily
9/29/2002: Alzheimer's-Associated
Enzyme Elevated in Key Brain Areas - Science
Quest
9/18/2002: Critics
claim Alzheimer's study may harm patients - New
Scientist
9/6/2002: Verbal
Memory Test Best Indicator Of Who Will Have Alzheimer's Disease, New Study
Says - Science
Daily
9/6/2002: Study Finds
Link Between Common Neurological Disorder And Alzheimer's
Disease - Science
Daily
8/24/2002: High-fat
diet may boost Alzheimer's risk - Nando
Times
8/22/2002: Study Points to
Depression as a Risk for Developing Alzheimer's Disease - Science
Quest
8/20/2002: Heston
Has Alzheimer's Symptoms - ABC
8/20/2002: Video-
Heston's Announcement - ABC
8/15/2002: Brain Boosters - ABC
8/14/2002: Dementia –
Before Or After Stroke – Increases Risk Of Death- Science
Daily
8/12/2002:Caregiving
Challenges - ABC
8/7/2002The
Long Goodbye - ABC
7/30/2002:Researchers
estimate Alzheimer's cases may triple by 2050 - Nando
Times
7/30/2002:Piecing
Together the Alzheimer's Puzzle - Science
Quest
7/28/2002:Healthy
diet, exercise may decrease Alzheimer's risk, scientists
believe - Nando
Times
7/28/2002:Lifestyle
linked to Alzheimer's
7/28/2002:Brain scan may detect
Alzheimer's - MSNBC
7/26/2002:Eat Your
Vegetables - ABC
7/22/2002:Blog to Cope With
Alzheimer's Fog - World Scientist
7/17/2002:Alzheimer's drug
boosts memory of non-sufferers - New
Scientist
7/7/2002:Diet
Rich in Foods With Vitamin E May Reduce Alzheimer's Disease
Risk - Science
Quest
7/3/2002:AI to Assist
Alzheimer's Patients - Wired News
6/26/2002:Elevated
Levels of Cholesterol Play an Even Greater Role in Development of
Alzheimer's - Science
Quest
6/21/2002:Test
may provide early indications of Alzheimer's -
CNN
6/20/2002:Urine
Test Predicts Alzheimer's Disease - Science
Quest
6/18/2002:Flat
battery -
BBC
6/16/2002:Researchers Find
New Cellular Target to Thwart Alzheimer's - Science
Quest
6/1/2002:MRI Brain
Scan May Detect Alzheimer's Disease Decades Before First
Symptoms - Science
Daily
5/23/2002:Jogging
Every Day May Keep Alzheimer's Away; Exercise Seen To Help Brain Respond To
Outside Stimuli, May Affect Nerve Cell Health - Science
Daily
5/22/2002:Fruit
Fly Alzheimer's Model Should Be Invaluable Tool - Unisci
5/21/2002:Scientists
Find a Gene That's Key to Cloning Success but Also Hints at Serious Hurdles to
Reproductive Cloning -
Science
Quest
5/21/2002:Molecular
"Motor" Drives Rotavirus Replication - Science
Quest
5/21/2002:No
consensus on cloning regulation among experts - Nando
Times
5/21/2002:Alligator's
sensitive side -
BBC
5/20/2002:New drug tackles
Alzheimer's clumps - New Scientist
5/20/2002:Drug saps
Alzheimer's - Nature
5/11/2002:Tau Protein
Required For Development Of Alzheimer's Disease - Science
Daily
5/9/2002:Tau
Protein Required for Development of Alzheimer's Disease - Science
Quest
5/4/2002:Alzheimer's
in America - ABC
4/23/2002:Study
examines effect of gingko
biloba on MS patients - Nando
Times
4/12/2002:Vaccine
may reverse Alzheimer's claims researchers - Ananova
4/19/2002:Heart
drug slashes Alzheimer's risk -
BBC
4/14/2002:Memory Loss After
Brain Injury Worse When E4 Form of Alzheimer's Gene Present - Science
Quest
4/12/2002:Slowing
Alzheimer's Deadly March? - Business
Week
4/11/2002:New Approaches Seen For Early
Alzheimer's Diagnosis
- Unisci
4/11/2002:Novel Function
Identified for Alzheimer's Protein - Science
Quest
4/10/2002:Study suggests
progress on Alzheimer's - NY
Times
4/10/2002:"Brain Rust" Drug
Offers Hope For Alzheimer's - Technology
Review
4/9/2002:Expert
predicts Alzheimer's prevention drug 'within seven years' - Ananova
4/7/2002:Gila Monster
Spit May Yield Alzheimer's Drug - ABC
4/7/2002:Huge Breakthrough in
Alzheimer's Research -
Cosmiverse
4/6/2002:Medicare
now covers Alzheimer's treatment - Seattle
Times
4/6/2002:Misshapen
proteins linked to Alzheimer's and other diseases - Nando
Times
4/6/2002:Smoking gun found for
Alzheimer's - Nature
4/3/2002:Never
Too Late - ABC
4/3/2002:New Findings About Brain's "Compass" Offer Clues About
Alzheimer's - Science
Quest
4/2/2002:Iris,
Alzheimer's and us -
BBC
3/29/2002:Blood test could
predict Alzheimer's -
New Scientist
3/29/2002:Researchers
Develop Blood Test to Diagnose Alzheimer's-Type Changes in
Mice - Science
Quest
3/24/2002:Bad
for the Brain - ABC
3/24/2002:Cholesterol-lowering drugs may avert Alzheimer's, study
suggests - Nando
Times
3/23/2002: Enzyme Once
Thought Harmful to Alzheimer's Patients Now Appears to Be a Key to Future
Treatment - Science
Quest
3/16/2002:Heading
footballs 'risks later dementia' - Ananova
3/10/2002:Duke
researchers identify age at onset genes for Alzheimer's and Parkinson's
disease - Eureka
Alert
3/10/2002:Training Improves Age-Related
Memory Decline - Eureka
Alert
3/9/2002:Development
of Alzheimer's vaccine ends in disappointment - Nando
Times
3/8/2002:Relationship Seen Between
Down Syndrome, Alzheimer's
- Unisci
3/7/2002:Relationship Seen Between
Down's Syndrome, Alzheimer's -
Science
Quest
3/6/2002:Alzheimer's
mother gives birth to healthy baby - Ananova
3/5/2002:Researchers Identify Age
at Onset Genes for Alzheimer's and Parkinson's Diseases - Science
Quest
3/5/2002:Dementia Gene
Located - Cosmiverse
2/27/2002:Dementia
drugs put under spotlight -
BBC
2/22/2002:Amino
Acid Linked to Alzheimer's - ABC
2/20/2002:Mental Stimulation May
Reduce Alzheimer's Risk - Cosmiverse
2/12/2002:Acetylcholine Deficits Not
Found In Early Alzheimer's - Unisc
2/11/2002:Bacteria
study signals promising step in the fight against
Alzheimer's - Nando
Times
2/10/2002:Alzheimer's
surgery could hold promise - CNN
2/10/2002:Alzheimer's
vaccine study suspended - CNN
2/8/2002:Road Skills Hint At
'Motion Blindness' Of Alzheimer's - January 31, 2002 - Eureka
Alert
2/8/2002:E. coli
bacteria make Alzheimer’s-linked fibers - Eureka
Alert
2/8/2002:New Alzheimer's study to
focus on children - Eureka
Alert
2/8/2002:University
of Pittsburgh research uncovers new mechanism that may be the cause of mild
cognitive impairment -
Eureka
Alert
2/2/2002:Green
light for a tipple -
BBC
2/1/2002:Vascular
dementia patients taking ARICEPT® show significant treatment benefits in
cognition and function
- Eureka
Alert
1/31/2002:Moderate
drinking 'halves Alzheimer's risk' - Ananova
1/29/2002:New
compounds suppress neuroinflammation of Alzheimer's disease - Eureka
Alert
1/28/2002:Alzheimer's
vaccine trial suspended - New
Scientist
1/27/2002:Testosterone
blocks Alzheimer's brain abnormality - Nature
1/21/2002:Researchers
find definitive proof that repetitive head injury accelerates the pace of
Alzheimer’s disease - Eureka
Alert
1/20/2002:Head
injuries linked to rapid spread of Alzheimer's disease - Nando Times
1/21/2002:Researchers
find definitive proof that repetitive head injury accelerates the pace of
Alzheimer’s disease -
Eureka
Alert
1/17/2002:High
hopes for Alzheimer's film -
BBC
1/15/2002:Alzheimer's
Imaging -
ABC
1/14/2002:Study
to look at possible benefits of musical training on brain function in young and
old -
Eureka
Alert
1/14/2002:Alzheimer's
plaques imaged in living patients for first time - New Scientist
1/13/2002:Adding
vitamin C to certain drugs may help treat Alzheimer’s, other brain
disorders -
Eureka
Alert
1/9/2002:Scientist Finds Genetic
Clues To Alzheimer's; Establishes DNA Bank For Future Studies - Eureka
Alert
12/27/2001:Leisure
activity decreases risk of Alzheimer's disease
12/27/2001:Hormone
replacement therapy may delay cognitive decline in older
women - Eureka
Alert
12/27/2001:HRT
'delays mental decline' -
BBC
12/27/2001:One
common factor -- context -- may underpin the normal cognitive problems of
aging - Eureka
Alert
12/25/2001:Vitamin
E could halt Alzheimer's -
BBC
12/20/2001:Alcohol
and dementia among the elderly - Eureka
Alert
12/18/2001:Brain
damage from HIV, Alzheimer's, may have similar mechanism, SFVAMC researchers
say -
Eureka
Alert
12/10/2001:Texas A&M
chemical engineers suggest Alzheimer’s onset tied to cholesterol, brain
chemicals- -
Eureka
Alert
12/8/2001:Normal
Function of Alzheimer's Protein Identified - ABC
12/8/2001:Protein Insight Could Lead To
Alzheimer's Treatment -
Unisci
12/8/2001:Mechanism of
short-term memory loss revealed
- New Scientist
12/7/2001:Plaque-forming
protein seen in Alzheimer's linked to clogged brain transportation
system -
Eureka
Alert
12/7/2001:Cell Transport and Alzheimer's
Disease -
Eureka
Alert
12/6/2001:Fading
Memories - ABC
12/1/2001:Plaques Don't
Cause Alzheimer's Memory Loss- Study - ABC
11/28/2001:Alzheimer's
disease and exposure to vaccines - Eureka
Alert
11/28/2001:The
immune system and Alzheimer’s disease - Eureka
Alert
11/23/2001:Dutch
study says anti-inflammatory drugs may reduce risk of Alzheimer's
disease - Nando Times
11/23/2001:Curry
can fight Alzheimers disease
- Ananova
11/18/2001:Unique
genetic alteration in presenilin 1 gene predisposes some Caribbean Hispanics to
early-onset Alzheimer's disease - Eureka
Alert
11/10/2001:Painkillers
may prevent Alzheimer's
-
BBC
11/10/2001:PET
Scans Can Detect Early Alzheimer's-UCLA Study - Yahoo
11/3/2001:Preventing
Alzheimer's - ABC
11/3/2001:
Who's At Risk? - ABC
10/27/2000:Alzheimer's
May Be Linked to Body Shape
- ABC
10/27/2000:Alzheimer's- Few
clues on the mysteries of memory. - CNN
10/23/2001:Small
head circumference coupled with ApoE e4 gene is a factor in Alzheimer's
disease -
Eureka
Alert
10/16/2001:When Alzheimer's Patients
Wander Off, Urgency Needed - Unisci
10/7/2001:Alzheimer's
Disease -
CNN
10/2/2001:Scientists Discover a
Therapeutic Strategy for "Misfolding Diseases"
10/1/2001:Retreat Is A Step Forward for Alzheimer's
Research -
Science
Daily
9/30/2001:Protein
tied to Alzheimer’s also plays key role in honeybees - Eureka
Alert
9/30/2001:Scientists at the Scripps
Research Institute discover a therapeutic strategy for "misfolding diseases"
analogous to Alzheimer's disease - Eureka
Alert
9/26/2001:Snails
on trail of memory loss -
BBC
9/25/2001:Alzheimer's and
Parkinson's proteins create a destructive team - Eureka
Alert
9/12/2001:Alzheimer's
predicted 'years in advance' -
BBC
9/12/2001:A
Walk With Danger - ABC
9/5/2001:Dementia
patients aware of losing grasp suffer breakdowns most - Eureka
Alert
9/3/2001:Estrogen
patch may improve memory for women with Alzheimer's -
Eureka
Alert
9/3/2001:First-ever
published study of moderate to severe Alzheimer's disease patients taking
Aricept (r) shows significant treatment benefits in cognition, daily living
activities and behavior - Eureka
Alert
9/1/2001:Aging
With Grace: The Nun Study and the Science of Old Age - SciTech
8/30/2001:Breakthrough
mouse produced with both lesions associated with Alzheimer's -
Eureka
Alert
8/28/2001:Brain
trauma may increase the risk of Alzheimer's disease -
Eureka
Alert
8/25/2001:Toward
Early Diagnosis of Alzheimer's Disease - SciTech
8/19/2001:Alzheimer's
researchers revive "dead" brain cells- New Scientist
8/19/2001:Toward Early
Diagnosis of Alzheimer's Disease - Scientific American
8/14/2001:Keele
Scientist's Book On Aluminium And Alzheimer's Disease- AlphaGalileo
8/14/2001:Where Does Alzheimer's Start?- Technology Review
8/13/2001:Alzheimer's
vaccine in human trials next - CNN
8/13/2001:Alzheimer's
Disease
8/8/2001:Attacking
Alzheimer's - Access Excellence
8/4/2001:Designer
chemical offers Alzheimer's hope - Eureka
Alert
8/4/2001:NYU
researchers successfully immunize mice against Alzheimer's - Eureka
Alert
8/1/2001:Clues to a Cure for
Alzheimer's - Scientific American
7/26/2001:More tests
set for Alzheimer's drug - Dallas News
7/25/2001:Data
show new Alzheimer's drug offers hope for broad spectrum of
dementia -
Eureka Alert
7/23/2001:Secret's
in the Gray Matter - Lycos
7/20/2001:Gladstone
researchers find clue to Alzheimer's disease risk factor - Eureka
Alert
7/12/2001:Benefits From
Alzheimers Plaque-Producing Reaction - Headline Spot Science Study Proposes
Role In Gene Expression...
7/11/2001:Study Gives
Clues to Workings of Anti-Alzheimer Antibody-Science
Central
7/10/2001:Study
Sheds Light on Alzheimer's Plaque Process - Lycos
7/10/2001:Evidence That Alzheimer's Protein
Switches on Genes- Science
Central
7/9/2001:Local team
gains on Alzheimer's- Dallas News
7/1/2001:Portrait
of Alzheimer's -
BBC
6/28/2001:White House selects
science adviser - MSNBC
6/24/2001:Metal Chelators Reduce
Alzheimer's Plaques In Mouse - Unisci
6/22/2001:Study Suggests that
Potential Alzheimer Drugs Might be Dangerous- Science
Central 8/25/2001:Toward
Early Diagnosis of Alzheimer's Disease - SciTech
6/22/2001:Study:
Forgetfulness May Indicate Alzheimer's - Lycos
6/21/2001:New genetic risk
factor for susceptibility to Alzheimer's disease
6/21/2001: Alzheimer's
disease and the dementia continuum- New data that may change the way patients
... - Eureka Alert
6/20/2001:Alzheimer's
Protein Dements Flies-
Inscight
6/18/2001:Oxidative Damage
Occurs Before Alzheimer's Plaques
- Yahoo
6/17/2001:Penn
study findings reverse key chronology for development of Alzheimer's
disease- Eureka
Alert
6/17/2001:High blood pressure and cholesterol levels increase risk of
Alzheimer's - Eureka
Alert
6/15/2001:Sleep
apnea linked to Alzheimer's, heart gene - Nando
Times This is interesting because sleep
apnea may be linked to cerebral hypoxia, which could conceivably cause brain
damage. About 8% of sleep apnea patients could have the E-4 allele of the gene
that's associated with familial hypercholestrolemia and Alzheimer's disease.
6/8/2001:. The Kearneys (Kevin,
Cassidy, Michael, and Maeghan) have sent a most excellent article
that resolves an earlier paradox in the Alzheimer's
disease Science News. There was a British report last July, Alzheimer's
vaccine 'safe to use', about several patients who had been recruited for
early Phase I trials of a promising new Alzheimer's vaccine. Such vaccines have
prevented Alzheimer's plaques from developing in the brains of mice. Then in
December, there was an announcement, Researchers develop
vaccine for Alzheimer's , about the revolutionary discovery of an
Alzheimer's vaccine in Toronto. But the Toronto vaccine was in an earlier stage
of development than the British vaccine, having only been tried with mice. It
would be a year before human trials could begin. But what had happened to the
British Phase I trials? How did the efforts relate? The above article seems to
tell the tale. The British have been inundated with requests to admit Grandma
and Uncle Bartholemew to their experimental program. Consequently, they're
keeping a low profile. Let the Toronto researchers enjoy the limelight, and fend
off Granny and Uncle Bart. Pretty shrewd! Now the Brits are in Phase II trials
with 80 patients at 4 secret British hospitals. Sh-h-h! If you find out which
hospitals they are, don't tell anybody. It's a secret.
The article mentions that, unfortunately, it will be at least five years before
such vaccines are approved for clinical use.
6/3/2001:.Alzheimer's Tau Protein Same
As Punch Drunk Fighter's
This article observes that
the fibrous tangles of tau proteins that form in the brains of both
prizefighters and AD patients are identical. However, these tangles are found in
different parts of the prizefighters' brain than in the brains of AD victims.
Also there are other features of AD that differ from those who suffer from
Dementia Pugilistica (DP). There seems to be a tantalizing link between head
trauma and the subsequent development of Alzheimer's Disease. You wonder whether
boxers have a higher incidence of AD later in life.
5/31/2001:.Statins... the
New Wonder Drug?
The cholesterol lowering family of medications known as
"statins" is bidding fair to become the most broadly beneficial family of drugs
yet discovered. Among its many benefits is the ability to reduce the likelihood
of contracting Alzheimer's Disease by two-thirds!
5/31/2001:.Statins' beneficial effects on HDL
What
this article seems to be saying, in "medicalese", is that the statins not only
lower total serum cholesterol but simultaneously raise HDL levels. Tommie Jean
has been on levastatin for five years. It has lowered her total cholesterol
while raising her HDL (High-Density Lipoprotein) levels into the 80's. Her good
cholesterol (HDL) is presumably removing cholesterol faster than her bad
cholesterol (LDL) can deposit it in her blood vessel walls.
5/31/2001:.Memory
Lapse -- or Alzheimer's?
This article is a little frightening. It observes that a
great deal of damage has already been done before the first symptoms of
Alzheimer's Disease appear. Death typically occurs between 3 and 14 years after
diagnosis. "At Washington University in St. Louis, an Alzheimer's research unit
has autopsied the brains of 630 older people over the past two decades. John C.
Morris, who leads the group, says the autopsies have shown that people with mild
cognitive impairment generally already have large accumulations of the plaques
and tangles that are associated with Alzheimer's. 'I would say that significant
cognitive change is not part of truly healthy aging,' says Morris. 'When it
occurs, our evidence suggests it's highly indicative of the brain findings of
Alzheimer's disease.'"
"Some scholars are even more
reluctant to link the early signs of memory loss with a diagnosis of
pre-Alzheimer's. The average 80-year-old has lost 7 to 10 percent of his or her
brain volume since early adulthood, points out David Drachman, a leading
Alzheimer's researcher at the University of Massachusetts Medical School. After
age 65, the rate of dementia doubles every five years, so that half of everyone
over 85 is demented. By 100, only rare individuals remain mentally normal."
5/31/2001:.Elderly
people with a low intake of vitamin B12 and folate may be twice as likely to
develop Alzheimer's disease
This observes that those
elderly with a low intake of vitamin B12 and folate are twice as likely to
present with Alzheimer's as those with higher intakes. More specifically,
"Those with low levels of B12 or folate, defined as less
than 150 picomoles per litre of blood (pmol/l) and 10 nanomoles per litre
(nmol/l) respectively, were twice as likely to have been diagnosed with AD three
years on. Unexpectedly, the researchers found that the risk was even higher for
those elderly people who combined a deficit in the two vitamins with high scores
on cognitive tests at the outset - a correlation they are as yet unable to
explain."
The researchers also observe that a high intake
of folate is thought to promote the growth of existing cancers.
B12 is found in fish, meat, and dairy products, while
spinach, peas, and grains are rich in folate.
5/29/2001:.Researchers
find how Alzheimer's clutters brain
Buildup of
beta-amyloid interferes with cellular garbage disposal, and could be the culprit
(depending upon which region of the brain is involved) in Parkinson's Disease,
Amylotrophic Lateral Sclerosis (ALS - Lou Gehrig's Disease), and possibly even
other diseases such as cystic fibrosis. The article also references a Japanese
paper, Researchers
Report Possible New Alzheimer's Weapon, describing a potential treatment by
boosting the levels of neprilysin, which tears down amyloid. The article also
quotes an American researcher, Dr. Louis Hersh, involved in similar research at
the University of Kentucky.
5/27/2001:.Researchers
Report Possible New Alzheimer's Weapon
This related
Japanese paper (cited above) observes that the effect is dose dependent, meaning
that even a slight change in neprilysin levels has a significant effect upon
beta-amyloid levels. The article says, "Aging-associated down-regulation
(reduction) of neprilysin will increase the risk of developing Alzheimer's
disease. Therefore, maintaining neprilysin activity above a certain level will
be a preventive measure," Saido said.
Regulating the
level of neprilysin through diet, by eating foods that elevate the enzyme or
avoiding so-called neprilysin inhibitors, may also become a actor, Saido said.
Next question: what foods have these properties?
5/25/2001:.Unique
sleep symptoms found in Alzheimer's
5/25/2001:.Protein
model points to smoking, Alzheimer's drugs - Reuters
5/24/2001:.Brain
diseases discovery
5/24/2001:.Enzyme Breaks Down Alzheimer's Protein
5/23/2001:.When it's
time to worry This gives some memory tests that you can use to check your
memory.
5/20/2001:.The Nun
Study This landmark study among nuns indicates that "idea density" and
grammatical complexity were predictive markers for Alzheimer's Disease 50 years
before the onset of symptoms. "Kemper, an expert on the effects of aging on
language usage, had earlier shown that 'idea density' — the number of discrete
ideas per 10 written words — was a good marker of educational level, vocabulary
and general knowledge. Grammatical complexity, meanwhile, was an indicator of
how well memory was functioning."
"Applying these
measures to the sisters' autobiographies, Snowdon and Kemper found to their
astonishment that the elderly sisters who showed signs of Alzheimer's had
consistently authored essays low in both idea density and grammatical complexity
a half century or more earlier. One of the lowest-scoring samples begins: 'My
father, Mr. L.M. Hallacher, was born in the city of Ross, County Cork, Ireland,
and is now a sheet-metal worker in Eau Claire.' By contrast, one of the
highest-scoring essays conveys the same type of information but in a
dramatically different way: 'My father is an all-round man of trades, but his
principal occupation is carpentry, which trade he had already begun before his
marriage with my mother.'"
"Idea density turns out to be
an astonishingly powerful predictor of Alzheimer's disease — at least among the
School Sisters of Notre Dame. Snowdon found by reading nuns' early writings, he
could predict, with 85% to 90% accuracy, which ones would show the brain damage
typical of Alzheimer's disease about 60 years later. 'When we first looked at
the findings,' says Snowdon, 'we thought, ‘Oh my God, it's in the bag by the
time you're in your 20s.'"
"But Alzheimer's is not that
simple. One especially telling case: Sister Bernadette (not her real name), who
had shown no outward signs of Alzheimer's and whose youthful autobiography was
rich with ideas and grammatical complexity, turned out at death to be riddled
with the plaques and tangles of Alzheimer's (see diagram). Says Snowdon: "Lesson
No. 1 in my epidemiology training is that there are hardly any diseases where
one factor alone, even in infectious disease, will always cause illness."
"These results posed a chicken-and-egg problem: Did
higher brain capacity protect the sisters from developing the symptoms of
dementia, or were those with lackluster biographies already suffering very early
signs of some brain abnormality that predisposed them to mental decline later?
That question remains unanswered — but follow-up studies, to be published next
month in the journal Psychology and Aging, suggest that exercising what brain
capacity you have offers some protection. While all the sisters show age-related
decline in mental function, those who had taught for most of their lives showed
more moderate declines than those who had spent most of their lives in
service-based tasks. And that, says Kemper, supports the commonsense idea that
stimulating the brain with continuous intellectual activity keeps neurons
healthy and alive. (Of course, notes Snowdon, these activities are not absolute
protectors. For some, a genetic predisposition may override even a lifetime of
learning and teaching.)"
Another critical finding was
that cardiovascular disease plays a role in the etiology of Alzheimer's Disease.
Nuns with high folate (folic acid) levels showed little
evidence of Alzheimer's-type damage.
Vitamin E and
vitamin C levels were uncorrelated with Alzheimer's plaques, as was mercury and
aluminum in their diets.
Recommendations: Avoid head
injuries and strokes. Boost folate or (folic acid) levels in the diet (e. g.,
with spinach or other foods rich in folates). Antioxidants may still be
advisable. Keep reading, and exercising your noggin.
5/19/2001:.Trying to
Stop Alzheimer's — From the Inside Out
This article
describes the first human trial of a new gene therapy in which a patient's skin
cells are modified to produce nerve growth factor, and are then injected deep
into the brain in the nucleus basalis. Animal studies indicate that this might
be effective. "It will be years before we see anything definitive."
5/19/2001:.Self-Test:
How Sharp Is Your Memory?
5/14/2001:.Diet and
dementia
This article confirms the link between low
blood serum levels of folate and vitamin B12 (cyanocobalamine), and
the subsequent development of Alzheimer's Disease.
5/12/2001:.Poor
Memory Linked to High Homocysteine Levels
"We don't know whether high
levels of homocysteine cause poor recall or whether they are merely identifying
people who have undiagnosed vessel disease in the brain, which may be the true
cause of the poor recall,'' Morris told Reuters Health.
"It will be interesting to see whether folate fortification of various foods,
through its anticipated effect on homocysteine concentrations, will result in a
lower rate of poor memory among the elderly in the United States,'' the authors
conclude.
5/12/2001:.Galantamine therapy shows sustained cognitive benefits for
Alzheimer's patients
Galantamine, approved in the UK,
and currently undergoing clinical trials in the U. S., acts both as a
cholinesterase inhibitor, like Huperzine-A, Tacrine, and , and also modulates
nicotinic acid receptors in the brain.
5/9/2001:Research Ties Vitamin B12 and Folate Deficiencies With
Alzheimer's Disease
5/9/2001:Scientists Propose a New Theory for the Pathogenesis of
Alzheimer's Disease
Researchers at USC and
Northwestern present evidence that aging-associated inflammatory processes
within the brain that generate soluble "wadded up" amyloids called "amyloid beta
derived diffusible ligands" (ADDL's). These ADDL's are postulated to be the true
cause of Alzheimer's Disease rather than amyloid-cascade plaques or fibrils.
5/5/2001:Chemical
finding may be key to treating Parkinson's disease
5/2/2001:Molecule Reduces Alzheimer Plaques in Brain
This article also sounds the theme advanced in the two
articles Researchers
find how Alzheimer's clutters brain, and Researchers
Report Possible New Alzheimer's Weapon, that trash collection is critical to
the avoidance of Alzheimer's Disease (and perhaps other neurodegenerative
diseases). The investigators report that a molecule, called T Growth Factor-b1,
reduced the numbers of amyloid plaques by a factor of 75% and overall
beta-amyloid levels by 60% in mice.
"People always
thought that inflammation and microglial activation were bad," said Tony
Wyss-Coray, PhD, lead author, investigator at the Gladstone Institute of
Neurological Disease and assistant professor of neurology at UCSF. "But we
showed that, when stimulated by TGF-b1, microglial activities can be
beneficial."
"Since TGF-b1 has many effects other than
those revealed in this study, physicians probably won't be using TGF-b1 to treat
patients. More promising would be to zero in on the molecules that microglia
produce when they are stimulated by TGF-b1. Such factors could be useful for
treating or preventing the accumulation of b-amyloid in Alzheimer's disease,
Wyss-Coray explained."
5/2/2001:Alzheimer's disease gene appears to reduce risk of developing
age-related macular degeneration
One of variants of a
gene that predisposes individuals to Alzheimer's Disease--the apolipoprotein E-4
gene--reduces the risk of developing age-related macular degeneration (AMD). AMD
affects 1 in 6 U. S. citizens between the ages of 55 and 64, and 1 in 3 over the
age of 75. Smoking, fatty diet, and atherosclerosis are known risk factors for
macular degeneration. Half the individuals with the Apo-E4 gene, who are at risk
for Alzheimer's Disease, suffer from macular degeneration compared with those
with Apo-E2 gene. Would you rather be blind or mindless?
4/20/2001: Researchers
link failed cell division, Alzheimer's disease
Researchers have found a significant number of brain cells in Alzheimer's
patients with extra copies of chromosomes, showing attempts at cell division in
cells that are not supposed to divide. This effort to divide is the likely cause
of the nerve degeneration and dementia in Alzheimer's disease, say the
researchers. "It's almost as if Alzheimer's disease were a novel form of
cancer," says Karl Herrup, senior author of the findings...
According to Herrup, memory loss in Alzheimer's disease
is always associated with the accumulation of strange deposits in the brain
known as plaques and tangles. Most investigators agree that these deposits are
central to the disease, but are not in and of themselves the cause of memory
loss. The clinical symptoms are more closely tied to the nerve cell death, but
the links between plaques and death were unclear.
"The
simplest view is that plaques are directly toxic to neurons. The cell division
hypothesis puts a different spin on this idea," he says. The brain cells of
Alzheimer's patients apparently enter the cell division process, make the extra
chromosomes, but never create new cells to pass on the extra copies. "We
speculate that is the root cause of the nerve cell death."
A theory they put forth with other CWRU/UHC colleagues hypothesizes that
the plaques which are a hallmark of Alzheimer's disease brain cells trigger an
inflammatory response in the brain, and that this response brings with it
proteins that trigger cell division.
4/14/2001: First Gene Therapy Surgery
For Alzheimer's Disease
This article is an
alternative description of the surgical implantation of genetically modified
skin cells into the nucleus basalis to boost neural growth factor.
4/11/2001:Study cuts
estimate of life span after dementia
This article reduces the median survival time for
Alzheimer's patients from 5-to-8 years to 3.3 years after the onset of the
disease. However, the article also states,
"Most patients
in the current study were elderly, and "the main determinant of survival
and mortality in elderly populations, regardless of the presence of dementia, is
age,"
4/6/2001:
Naturally occurring protein could slow Alzheimer's disease
Boosting Apo-A levels by consuming fruits, soybeans,
coconut oil, and some wines and teas. I have just read a 5/29/2001
4/4/2001:
Soy
May Help Protect Brain From Alzheimer's - Study
This
study was performed with monkeys and indicated that the isoflavones in soy may
protect against Alzheimer's disease. However, human trials haven't yet taken
place.
3/3/2001:
Enzyme
is key to hallmark of Alzheimer's-- moves to block it underway
This Johns Hopkins study identifies the enzyme
beta-secretase as essential for the development of the beta-amyloid plaques that
are a hallmark of Alzheimer's Disease (AD). If further testing proves
successful, physicians might give "cocktails" of various enzyme blockers, or
secretase blockers along with vaccines. Inflammation is also implicated in this
plaque formation process.
2/28/2001: Hopkins
Scientists Show Enzyme Is Key to Hallmark of Alzheimer's
Same paper as the above.
2/20/2001: An
End to Alzheimer's?
This article credits Bob Vassar
at biotechnology firm Amgen with discovering the secretase gene (with a nearly
simultaneous discovery at three other drug companies). Bristol-Myers Squibb
entered Phase I trials of a gamma-secretase inhibitor in April, 2000. Meanwhile,
Amgen has divined the structure of beta-Secretase and is racing to produce a
specific beta-secretase blacker, as are GlaxoSmithKline, and Pharmacia.
"Both of us view beta-secretase as a terrific target,"
says Dale Schenk, vice president of discovery research for Elan. "I don't think
it's going to be terribly long before the field has clinical candidates."
Schenk's optimism is based, in part, on an obvious
precedent: AIDS. That's because beta-secretase is a protease, or protein cutting
enzyme, in the same class as the HIV protease, which proved to be a great drug
target. Once the HIV-protease structure was discovered in 1989, it took less
than three years to get "protease inhibitors" into the clinic. These drugs have
changed AIDS from a death sentence into a usually manageable condition.
"Pharmaceutical companies like sure things," says University of South Florida
Alzheimer's researcher Huntington Potter. Blocking enzymes "is something they
can do easily and be sure that they have something fairly successful at the
end."
How soon will this happen? "I predict that we're
going to have an armamentarium of drugs in the next five years—10 years
maximum—some or many of which will be effective," says Potter. "It's going to be
longer before we can say that we've cured the disease."
2/20/2001: Attacking Alzheimer's
This article describes "decoy" compounds created by MIT
biologist Vernon M. Ingram that render harmless the toxic fibrils in the brains
of Alzheimer's patients. The article explains that fibrils of amyloid peptide
molecules stack together to form long ribbon-like peptide arrays that aggregate
to form the characteristic Alzheimer's plaques. The plaques consist of insoluble
deposits of beta-amyloid, a protein fragment snipped from a larger protein
called amyloid precursor protein (APP). It appears that only the aggregated
fibrillar forms of the beta-amyloid peptide are toxic.
When these fibrils contact neurons, they open channels in the cell that allow
large amounts of calcium to enter. Elderly brain cells are particularly
vulnerable because they have a diminished ability to get rid of excess calcium.
Ingram and his research team created 30 small peptides,
each between five and eight amino acids long, and tested them with lab-cultured
human nerve cells. Some had no effect. Eight of them counteracted the excessive,
toxic influx of calcium, knocking it down to normal levels. "In the presence of
the decoy peptide, the final product of the aggregate is not toxic," he said.
The fibrils still form, but are harmless and do not affect internal calcium
levels in the cells.
These decoy peptides also may be
effective in the treatment of another neurodegenerative condition: Huntington's
disease. Ingram plans to test the decoy method as a way to intercept the toxic
aggregates of mutant proteins responsible for Huntington's disease.
2/16/2001:
Monkey Brain Findings Lead To
Human Alzheimer's Trial
Essential brain fibers that
shrivel up and disappear in aged monkeys can be restored to normal levels with
infusion of tissue that has been genetically altered to produce nerve growth
factor (NGF). Two patients have been enrolled in a clinical trial now underway,
and another six are being recruited to evaluate this procedure in humans. (One
of these human trials is described in First Gene Therapy Surgery
For Alzheimer's Disease above.
2/5/2001: Alzheimer's Disease Anti
Inflammatory Prevention Trial (ADAPT)
This will
center upon the use of administration of over-the-counter NSAID's (non-steroidal
anti-inflammatory drugs) such as celcoxib or Aleve (naproxen sodium) to see if
they will reduce the inflammatory processes in the brain that are coincident
with Alzheimer's Disease. Epidemiological studies have indicated a reduced
incidence of AD among individuals who have taken these anti-arthritic
medications over extended periods of time. The study is recruiting individuals
who are over 70, who have no current symptoms, and who have a family history of
AD. The study will run 5 to 7 years.
Prospective
participants would probably be wiser to mimic the protocol by taking Aleve
twice a day (b. i. d.) themselves rather than participating in the study. For
one thing, this will be a double-blind study, with one-third of the patients
receiving a placebo. If you happen to be in the unlucky third... Also, if
you want to enroll in a later study, or change your own personal protection
plan, it would be more difficult to do so if you were already enrolled in the
NIA protocol. Or at least, that's my opinion.
This is an
interesting approach because it involves over-the-counter medication available
from Walmart, and it probably wouldn't harm you.
2/2/2001: Ab
peptide vaccination prevents memory loss in an animal model of Alzheimer's
disease
This describes a December, 2000, study in
which mice vaccinated with a beta-amyloid fragment were rendered immune to
plaque development and to Alzheimer's symptoms.
2/1/2001: "Smart
drug" Galantamine boosted by study
This article
explains the value of galantamine as a cognitive booster. Galantamine only
postpones the symptoms of AD (typically, for about a year), but it might be a
suitable choice for a memory and cognition enhancer for the cognitively
unimpaired.
1/31/2001:
Possible New Memory Pill for
Alzheimer's
Dr. Steven Rose and colleagues have
identified a five-amino-acid peptide in the amyloid precursor protein that
figures so prominently in Alzheimer's disease. The amyloid precursor protein is
a cell adhesion molecule that sticks together the two sides of a synaptic
junction. The five-amino-acid peptide is the active part of the protein that can
enhance the establishment of long-term memories.
For
further discussion, see What
you might do to try to prevent and/or treat Alzheimer's Disease.
1/30/2001:
Alzheimer's
vaccine 'safe to use'
This article, published in
July, 2000, is a bit of a puzzler. It explains that an Alzheimer's vaccine, then
in Phase I trials, seemed to be safe. Determination of effectiveness will be
known by 2002. However, this pre-dates the Alzheimer's vaccine "breakthrough"
described just above. It's not clear how the two vaccine programs relate to each
other.
1/30/2001:
Dementia
'can be reversed'
This study concludes that drug
treatments can switch on neurons that were thought to be dead. "Doctors found
that an increase in blood flow to her brain helped to restore brain cells and
reverse the dementia."
1/30/2001: Alzheimer Society's
News Site
This is the official Alzheimer's Society
web site.
1/26/2001:
Revival of Old Drug
in Alzheimer's Disease Battle
Clinical trials are
currently underway using an old drug called "cloquinol". Cloquinol is a
chelating agent (?) that removes from the brain the zinc and copper that
'decorate' plaques. It was taken off the market when it was found to drain
vitamin B12 from the body. However, knowing about this side effect should make
it possible to compensate for this problem. Since it's a well-known drug, it
might, perhaps, be cleared for therapy before other drugs. However, it's worth
noting that if feeds cancers, regulating its level through supplementation
might be a tricky business.
1/25/2001: UK watchdog
recommends three Alzheimer's drugs
The UK has
approved three drugs for the temporary reversal of Alzheimer's symptoms:
Aricept, Exelon, and Reminyl.
1/24/2001: Ginkgo May
Protect Against Alzheimer’s Protein
This article is
quite interesting because it involves the use of gingko biloba in vitro rather
than in vivo. Gingko's protective effects are thought to be because of the role
of its flavenoids as antioxidants rather than its turpenoids (which are
free-radical scavengers). A popular theory holds that beta-amyloid wreaks its
havoc through the production of free radicals known as reactive oxygen species
(ROS). Oxidative stress has been implicated in neurodegeneration in Alzheimer's
disease, stroke, and head trauma.
1/12/2001: Ginkgo may
be useful for Alzheimer's
120 to 240 milligrams a day
of gingko biloba led to improvements of 3% on memory tests, compared to 4.5%
using prescribed "memory-boosters". There was a slight chance of bleeding
complications at these daily levels of gingko biloba distribution.
1/3/2001: Manganese
Exposure May Speed the Emergence of Parkinson's Disease
12/28/2000 Hopkins
Scientists Show Enzyme Is Key to Hallmark of Alzheimer's
This is another article describing
beta-secretase, which is one of two enzymes involved in beta-amyloid production.
The other is gamma-secretase, but its role is still controversial. (See, "An
End to Alzheimer's?" above). Beta-secretase works by trimming off pieces of
a larger molecule (presenilin?) that parents beta-amyloid. It's part of a poorly
understood event in cells where amyloid appears and then is cleared. "But in
Alzheimer's, something goes wrong and amyloid really starts to increase."
A current hypothesis is that amyloid builds up, nerve
cells are damaged and brain tissue become inflamed. Some researchers believe
this chronic inflammation progressively injures nerve cells, leading to the
symptoms of the disease.
12/25/2000Researchers
Find Region Of Chromosome 10 Linked To Risk For Alzheimer's Disease
Researchers at the Mayo Clinic in Jacksonville, Florida,
have identified a new gene on chromosome 10, in addition to the gene on
chromosome 19 that mediates apolipoprotein E-epsilon-4. The new gene seems to be
associated with an elevation of beta-amyloid 42. Beta-amyloid 42 is associated
with early-onset familial AD, and is thought to, perhaps, contribute to the
development of AD. Dr. Steven Younkin said,
"We still
have a long way to go. The next step will be to find the chromosome 10 gene and
to figure out how it works." Dr. Younkin hopes that the gene will be found
within the next few years.
12/25/2000More About the New
Alzheimer's Vaccine
12/24/2000Researchers
Reveal Insidious Role of a "Serpin" in Alzheimer's Disease
Researchers have discovered that the protein
alpha1-antichymotrypsin is a serin protease inhibitor or serpin, and can double
the accumulation of amyloid plaque in the brains of mice, suggesting a possible
new target for therapy in humans.
12/22/2000Researchers develop
vaccine for Alzheimer's
This is confusing in the light of the article, Alzheimer's
vaccine 'safe to use', above. It describes a "breakthrough' at the
University of Toronto in which mice were treated with a beta-amyloid peptide
that blocked both the buildup of beta-amyloid plaques and the mental impairment
that they induce. "Not only were we able to clean up the brain tissue, but we
also
prevented the behavioral consequences of Alzheimer's," says Dr.
Peter St George-Hyslop, director of the CRND and a neurologist at Toronto
Western Hospital, University Health Network. "Obviously, it is more important
that a treatment or prevention in humans be able to block the clinical
dementia."
The researchers believe clinical trials could
begin on human subjects within the year.
12/21/2000Alzheimer's
Vaccine Breakthrough
This is a replay of the above article.
12/21/2000Alzheimer's
Disease 'Can Be Reversed'
This article recounts the effects of administering the AD
drug Aricept, which increased the blood supply to a patient's brain.
Dr Paul Kemp, director of the Department of Nuclear
Medicine at the University of Southampton and one of the project's leaders, said
the changes in the 70-year-old patient were dramatic. "For the first time we
have clear proof of a remarkable increase in blood supply to the brain which in
turn reflects improved activity in parts of the brain affected by the disease.
This lady's initial scans seemed to show irreparable damage to the cells
controlling short term memory and other thinking areas of the brain. But four
months later the scan showed clearly that the cells we thought were dead were in
fact lying dormant and could be switched back on."
The
first project will involve 25 patients with Alzheimer's who will be given the
drug over a nine month period and regularly scanned to detect differences in
blood supply to the brain. (Should report back about the 1st of August, 2001.)
12/21/2000Hormone
Replacement Therapy 'Could Fight Dementia'
Several researchers have found a strong link
between estrogen levels in post-menopausal women and the development of
Alzheimer's Disease. Three times as many women with low levels of estrogen
developed AD as those with high levels of estrogen.
12/21/2000Alzheimer's:
A disease of the young?
This article states that in the UK, more and more people
are showing up with AD at earlier ages. How many? As many as 17,000 under the
age of 65... i. e. not that many, unless you're one of them, and if you read
this page and take measures accordingly, you probably won't be one of them.
12/21/2000Scientists
uncover Alzheimer's clues
One study cited in this article mentions that Alzheimer's
disease may be caused by neurons that nerve cells start to divide in an
unregulated way in the brains of Alzheimer's patients.
"In healthy elderly people control mechanisms stop the division process, and the
affected nerve cells re-establish their connections within the brain without any
further consequence. The nerve cells start to produce Alzheimer's-type deposits
and form tangles, which lead to the confusion of messages. Lead researcher Dr
Zsuzsanna Nagy said: "Our results show that cell division starts due to high
levels of a molecule that builds up during folic acid deficiency, called
homocystein. We also found that loss of connections between nerve cells may play
a role, too."
The other study links AD to cardiovascular
arteriosclerosis. This is particularly prevalent with patients carrying the
apolipoprotein E-epsilon-4 allele.
"It may be that
Alzheimer's is partly caused by a poor blood supply starving the brain of key
nutrients and leading to cell damage. Lead researcher Professor Raj Kalaria
said: "Measures taken to change lifestyle or eating habits that improve
cardiovascular function, may be protective against Alzheimer's disease."
12/21/2000Alzheimer's
Drug Rivastigmine (Exelon) is a Success
Rivastigmine joins tacrine and donepezil as a
new cholinesterase inhibitor. "This is the first treatment to show compelling
evidence of efficacy," said Dr Michael Rosler, who led the study at
Psychiatrische Universitatsklinik in Wurzburg, Germany. It has "slight
gastrointestinal side effects".
12/21/2000Alzheimer's:
how mice beat it
Mice have a protein called LRP-1 that pushes beta-amyloid
past the blood-brain barrier. It could be that in AD patients, "either the
production of LRP-1 slows down, or poor circulation to the brain stops the beta
amyloid being flushed out"
Keeping active, either
mentally or physically is associated with a reduced risk of AD..
12/08/2000Penn
Researchers Find New Marker for Alzheimer's Disease
University of Pennsylvania
researchers have determined that a form of isoprostane found in urine could
serve as a readily accessible marker for AD. The isoprostane is one of a family
of molecules formed from fat and lipids when they are attacked by free radicals.
The amount of isoprostane increases dramatically in the presence of AD and
corresponds directly with another well known AD marker, the tau protein. While
an important indicator for AD, the tau protein is only found in the
cerebrospinal fluid (CSF), which can only be measured by a lumbar puncture,
commonly called a spinal tap. Isoprostanes, however, can be measured in CSF,
blood, and urine.
12/03/2000Lower-IQ
Children More Susceptible to Late-Onset Dementia
The study raises the question whether Alzheimer's
disease is a developmental process beginning at conception or whether it is a
disease acquired during the aging process, according to neurologist Richard
Mayeux, MD, of Columbia University in New York, NY, who wrote an accompanying
editorial on the study.
"If Alzheimer's disease is
developmental, then the lower intelligence scores may reflect the earliest signs
of the disease," Mayeux said. "This could then affect school performance,
discouraging further schooling. These results may suggest that having less
education is the result of Alzheimer's disease, not the cause of it. But there's
not much evidence to support that view.
An alternative
explanation is that people on the lower range of intelligence may be more
vulnerable to Alzheimer's disease later in life, Mayeux said.
The question of when Alzheimer's disease begins is a
challenge for researchers because there is no definitive biological marker for
the disease, Mayeux said.
"Right now, when there is no
way to prevent the disease, that question may seem moot," he said. "But if
preventive therapies such as estrogen, anti-inflammatory agents and gingko
biloba or the vaccine targeting amyloid accumulation prove to be effective, then
the need to know when the disease starts will become crucial."
11/04/2000Specific Protein
Oxidized in Alzhemier's, Parkinson's
New evidence
links oxidative damage in a protein found in nerve cells to the development of
degenerative diseases of the nervous system, such as Parkinson's and
Alzheimer's. "The protein, called alpha-synuclein, is one of the building blocks
of the brain lesions characteristic in patients with neurodegenerative
diseases," says Dr. Virginia Lee. Neurodegenerative diseases -- including
Parkinson's, Alzheimer's, diffuse Lewy body disease and multiple system atrophy
-- are collectively called synucleinopathies. Most commonly, they become
symptomatic due to a deficiency of a specific neurotransmitter -- in the case of
Parkinson's, it is dopamine. When the neurons that produce these chemicals die
or become impaired, which occurs with oxidation, the eventual results are
tremors and sometimes dementia.
"Our studies provide
conclusive evidence of oxidative damage in alpha-synuclein, and that such stress
may be a primary event leading to the onset and progression of neurodegenerative
synucleinopathies, particularly Parkinson's," says Lee. "This may pave the way
for developing therapies to stop or slow the oxidative damage, and thus slow or
reverse the progression of these diseases."
In the United
States, Parkinson's disease affects over a million people, and Alzheimer's
disease about 4 million people
10/24Serious
Earlier Head Injuries Linked to Alzheimers