Category Archives: Alzheimers/Dementia

More On Air Pollution & Dementia

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We previously put out a longish post about the effects of air pollution: Air Pollution: Shorter Life, More Dementia Risk, Worse Thinking. A London-based study from 2018 now extends those previous studies, showing that “We have found evidence of a positive association between residential levels of air pollution across London and being diagnosed with dementia, which is unexplained by known confounding factors.”

Here are two media articles on this study:
Is air pollution tied to higher dementia risk?
Air pollution linked to much greater risk of dementia
Here is a link to the study itself:
Are noise and air pollution related to the incidence of dementia? A cohort study in London, England

All links have been added to Alzheimer’s > Risk Factors.

Category: Alzheimers/Dementia, Risk Factors

US Dementia & Death Rates Increasing

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Dementia continues to grow as a significant problem in the United States. The CDC forecasts that between 2014 and 2060, the percent of the U.S. population living with dementia will rise from 1.6% of the population (5 million people) in 2014 to approximately 3.3% (13.9 million people) in 2060. And the rate at which Americans are dying directly from dementia has more than doubled from 30.5 deaths per 100,000 people in 2000 to 66.7 per 100,000 in 2017. And the cost to the U.S. is staggering, approaching $300 billion per year.

Here are two media articles about the expected doubling of the percent of U.S. persons living with dementia:
Rate of Americans living with Alzheimer’s expected to double by 2060
World Alzheimer’s Day: Why US Dementia Rates Will Likely Double By 2060
Here is the published CDC report:
Racial and ethnic estimates of Alzheimer’s disease and related dementias in the United States (2015–2060) in adults aged ≥65 years

Here are two media articles about the more than double increase in U.S. deaths directly due to dementia:
Deaths from dementia have more than doubled in US, report says
U.S. Dementia-Linked Death Rate More Than Doubles
Here is the CDC report:
Dementia Mortality in the United States, 2000–2017

Here are two media articles on the costs of Alzheimer’s disease to the U.S. health care system:

Alzheimer’s costs Americans $277 billion a year — and rising
Alzheimer’s: The Most Expensive Disease in America

All links have been added to Alzheimer’s > Epidemiology.

Category: Alzheimers/Dementia, Epidemiology

Sleep & Alzheimer’s

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Recent research demonstrates a good reason to sleep deeply: the slow and steady brain (and cardiopulmonary) activity associated with deep non-REM sleep are best for the function of the glymphatic system, the brain’s unique process of removing waste. That waste includes toxic proteins like beta amyloid and tau which are associated with Alzheimer’s.

Here are two media articles on the work:
Not all sleep is equal when it comes to cleaning the brain
Study: Deep Sleep Best for Brain ‘Cleaning,’ Emphasizes Link Between Sleep and Alzheimer’s

The research article is published at [paywall]: Science 22 Feb 2019: Vol. 363, Issue 6429, pp. 831-832.

The links have been added to Alzheimer’s > Neurology & Neuroplasticity.

Category: Alzheimers/Dementia, Neuro-Psych

Sniffing For Alzheimer’s

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The idea of being able to utilize an inexpensive “scratch & sniff” test such as described in Smelling Alzheimer’s & Brain Injury? to obtain early warnings of possible Alzheimer’s onset is certainly intriguing, and work is ongoing. Most recently, a study reported a correlation between development of poor sense of smell and a notably higher incidence of death within 10 years. The mechanism(s) and meaning(s) remain unclear.

Here are two media articles on the work:
Routine sense of smell tests could be used to spot signs of dementia
Poor sense of smell associated with nearly 50 percent higher risk for death in 10 years

Here is the research publication Summary for Patients:
Poor Sense of Smell and Risk for Death in Older Adults

Here are interesting overviews from 2017 and 2018:
Smell Test May Sniff Out Oncoming Parkinson’s and Alzheimer’s
Can a Smell Test Sniff Out Alzheimer’s Disease?

Here are media articles on several smell-related research reports from 2017:
Sniffing out dementia with a simple smell test
Alzheimer’s could be diagnosed early with sniff tests
Sniffing out dementia with a simple smell test

All links have been added to Alzheimer’s > Diagnosis & Tests.

Category: Alzheimers/Dementia, Diagnosis & Tests

World Health Organization (WHO) Dementia Recommendations

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The WHO recently released it’s first recommendations regarding prevention or delay of dementia. They include: getting regular physical exercise, not using tobacco, drinking less alcohol, maintaining healthy blood pressure, cholesterol, and blood sugar levels, and eating a healthy diet — particularly a Mediterranean diet. WHO also warned against taking dietary supplements such as vitamins B and E in an effort to combat cognitive decline and dementia.
Additionally, “An essential element of every national dementia plan is support for carers of people with dementia,” said Dr Dévora Kestel, Director of the Department of Mental Health and Substance Abuse at WHO. “Dementia carers are very often family members who need to make considerable adjustments to their family and professional lives to care for their loved ones.

Here are five media articles about the WHO report, including two covering expert reactions to the report:
Eat well, exercise more: New global guidelines to reduce risk of dementia
6 Ways To Reduce Your Risk Of Dementia, According To A New Report
WHO issues first advice on dementia: exercise and don’t smoke
expert reaction to WHO Guidelines on risk reduction of cognitive decline and dementia
How to cut your dementia risk, according to experts

Here are two WHO press releases, together with a set of WHO links on management of dementia:
Adopting a healthy lifestyle helps reduce the risk of dementia
WHO guidelines on risk reduction of cognitive decline and dementia
Evidence-based recommendations for management of dementia in non-specialized health settings

All links have been added to Alzheimer’s > Amelioration/Prevention.

Category: Alzheimers/Dementia, Amelioration/Prevention

FDA: Stop Making False Claims For Supplements

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The US FDA has sent warning letters to 17 manufacturers of supplements, warning them to cease making unsubstantiated claims that their products will prevent, treat or cure Alzheimer’s disease. These companies are illegally selling over 58 products which are unapproved new drugs and/or misbranded drugs.

Here are three media articles about the action:
FDA sends warning letters to 17 companies for ‘illegally selling’ products claiming to treat Alzheimer’s
FDA targets illegally marketed dietary supplements
Supplement Makers Touting Cures for Alzheimer’s and Other Diseases Get F.D.A. Warning

Here is the FDA press release:
FDA takes action against 17 companies for illegally selling products claiming to treat Alzheimer’s disease

All links have been added to
Alzheimers > Amelioration/Prevention > Vitamins & Select Foods.

Category: Alzheimers/Dementia, Vitamins & Supplements

Another Route To Alzheimer’s Diagnosis Thru The Eyes

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Because the retina at the back of the eye is essentially a part of the brain, it is an intriguing target for diagnosis of Alzheimer’s. Earlier, we reported on work (The Eyes May Know About Alzheimer’s) developing a scanning machine for determining the amount of plaque present in the retina. Recent work, using 39 people with Alzheimer’s and 133 healthy people, takes the same route through the eyes, but instead examines the density of the microscopic network of blood vessels in the retina. The network in healthy people was notably denser than that in people with Alzheimer’s.

Here are two media articles on the work:
Alzheimer’s and brain health could soon be detected using an eye exam
Could an eye doctor diagnose Alzheimer’s before you have symptoms?

Here is the research report:
Retinal Microvascular and Neurodegenerative Changes in Alzheimer’s Disease and Mild Cognitive Impairment Compared with Control Participants

All links have been added to Alzheimers > Diagnosis & Tests.

Category: Alzheimers/Dementia, Diagnosis & Tests

New Genetic Work May Provide Future Protection

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A large new investigation, using over 94,000 people in the US and Europe with clinically diagnosed Alzheimer’s Disease, explored their genetic makeup with reference to that disease. The study revealed five new genetic variants that increase risk for Alzheimer’s. The work will will not immediately affect medical practice in the immediate future, but potentially will provide insights into brain/body interactions involved with dementia, and may help lead to treatments for young people who carry these genes.

Here are two media articles about the work:
Newly discovered Alzheimer’s genes further hope for future treatments
Alzheimer’s Disease Meta-Analysis Identifies Five New Risk Genes

Here is the NIH (National Institutes of Health) press release about the work:
Data sharing uncovers five new risk genes for Alzheimer’s disease

And here is the research publication:
Genetic meta-analysis of diagnosed Alzheimer’s disease identifies new risk loci and implicates Aβ, tau, immunity and lipid processing

All links have been added to Alzheimers > Risk Factors > Genetics and Neuro-Psych.

Category: Alzheimers/Dementia, Neuro-Psych, Risk Factors

Gum Disease And/Or Herpes: Alzheimer’s Culprits?

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Science doesn’t always proceed linearly straight-forward. Quite often, it zigs and zags between competing hypotheses which can even be contradictory. Evidence is beginning to accumulate that this may indeed be the case with Alzheimer’s research. For over thirty years, from the early 1980’s, the dominant hypothesis has been that the accumulations of amyloid and tau protein plaques found in the brains of Alzheimer’s patients are abnormal and are the cause of the mental decline of those patients. So research focused on how to directly halt or mitigate the growth of those plaques, and that work has been strikingly disappointing. Quite large amounts of money have been invested in attempting to develop drugs which function directly against the plaque accumulation, yet none have been successful in human trials.

The hypothesis that there might be an external physical cause for the plaque accumulation, that there might be a bacterial or viral agent prompting the amyloid and tau accumulations, that the plaque accumulations might actually be a way the brain fights back against certain invaders, was regarded a heresy. But now there is developing evidence that there might be one or two or even more invading agents against which the brain attempts to fight back with the amyloid and tau plaques. (For the story of one of the herpes researchers, see How an outsider in Alzheimer’s research bucked the prevailing theory — and clawed for validation.)

We posted earlier (Herpes & Alzheimer’s and Herpes & Alzheimer’s — More) about studies strongly suggesting that the Herpes virus may be one of the causative agents. Separately, other studies (Periodontitis is associated with cognitive impairment among older adults: analysis of NHANES-III and
Inflammation and Alzheimer’s disease: Possible role of periodontal diseases) have suggested Periodontal diseases as similar agents. Now a new study strongly suggests that this may indeed be the case.

Here are four media articles about the newest work:
We may finally know what causes Alzheimer’s – and how to stop it
DEMENTIA AND GUM DISEASE: ALZHEIMER’S LINKED TO GINGIVITIS
Gum Disease Bacteria Found in Alzheimer’s Brains
How gum disease could lead to Alzheimer’s

And here is the research report on the work:
Porphyromonas gingivalis in Alzheimer’s disease brains: Evidence for disease causation and treatment with small-molecule inhibitors

All links have been added to Alzheimer’s > Risk Factors and Neuro-Psych

Category: Alzheimers/Dementia, Neuro-Psych, Risk Factors, Science

Mild Cognitive Impairment Risk: Lowering Blood Pressure Can Help

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Mild cognitive impairment (MCI) is the precursor stage to serious dementia. It can involve problems with memory, language, thinking and judgment. These problems are more substantial than the ordinary normal age-related mental changes. It’s well known that if you have high blood pressure, it is very beneficial to your heart to lower it, perhaps dramatically, to a systolic blood pressure less than 120 mmHg. A new study shows that such lowering can also measurably reduce the risk of MCI.

Here are six media articles on the work:
Lowering blood pressure may help cut risk of early dementia, study finds
Lowering blood pressure could cut risk factor for dementia
Mild cognitive impairment: Reducing blood pressure can lower risk
Treating high blood pressure could reduce risk of memory issues, study finds
Study Offers Hint of Hope for Staving Off Dementia in Some People
Major New Study Finds Lowering Blood Pressure Can Prevent Cognitive Decline, but Questions Remain
Here is the National Institutes of Health press release on the study:
Does intensive blood pressure control reduce dementia?

Here is a link to the study itself:
Effect of Intensive vs Standard Blood Pressure Control on Probable Dementia

All links have been added to Alzheimer’s > Amelioration/Prevention and Alzheimer’s > Risk Factors.

Category: Alzheimers/Dementia, Amelioration/Prevention, Risk Factors
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