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Sunday, September 10, 2017
Aging In Montclair and bevival
Thursday, August 24, 2017
Tuberculosis Has Been Shown to Cause Dementia
Tuberculosis has a long history with dementia and specifically
Alzheimer’s disease, one type of dementia.
Tuberculosis (TB) is caused by a slow growing bacterium with
the name of Mycobacterium tuberculosis. The “myco” in mycobacterium refers to a
thicker than normal cell wall. Because it grows slowly, TB spreads from person
to person only through frequent and close contact. By breathing the bacterium,
TB usually starts by attacking the lungs first and then spreads (seeding) to
other parts of the body, including your kidneys, brain and spine. Wherever it
seeds it damages the organ. In the kidneys it causes urine and blood in the
urine (sterile pyuria), Pott disease (spondylitis) in the spine, hepatitis in
the liver, lack of steroid hormones (Addison’s disease) in the adrenal gland,
swelling in the neck (scrofula) in the cervical lymph nodes, and inflammation
(meningitis) in the brain. Meningitis is the inflammation of the three
membranes (meninges) protecting your brain and spinal cord. The tough outer
membrane is called the dura mater, then the arachnoid and finally the delicate
pia mater, the inner most layer that touches the brain. TB meningitis affects
one in fifty cases of TB (much higher among children and those with HIV.) When
these protective layers are attacked there are serious consequences to the
brain.
The average survival with such TB–ridden brain was seven
years, similar to the mortality span of Alzheimer’s disease. Most patients with
Alzheimer’s disease typically die from infection or pneumonia and not cognitive
decline—we will revisit this again later.
In 2010 Neil Anderson with Auckland City Hospital, New
Zealand and his colleagues reported that people with TB meningitis had serious
complications. Around a third suffered from a stroke, problems with eye/eyelid,
pupil and lens, and epileptic seizures. Around
one in twenty suffered from the treatment itself (iatrogenic) through
drug-induced hepatitis, while a fifth of the patients died early from the
disease. For those that survive, one in ten had long-term cognitive impairment
and/or epilepsy. With such dramatic complications it is surprising to realize
how common TB remains to this day.
After HIV, TB is the major cause of death from a single
infectious agent and is one of the top 10 causes of death worldwide with 1.8
million people dying from the disease in 2016. Drug-resistant strains of TB
have already been identified in 105 countries including the U.S., and once
infected, we cannot do anything but watch helplessly as the person dies.
But there is another twist to the story of this bacterium.
In 2017 Lawrence Broxmeyer with the New York Institute of
Medical Research, undertook a historical review of how TB might have been the
cause of Alzheimer’s disease even during Alois Alzheimer’s time. Broxmeyer
argues that Alzheimer must have known this but elected to ignore it. By 2013 Francis
Mawanda and Robert Wallace with the University of Iowa, reported that one of
the prime suspects for Alzheimer’s disease was chronic bacterial infections
like tuberculosis. The brilliant Oskar Fischer of the Prague clinic, a
contemporary of Alois Alzheimer, noted this as well. The competition between
Alzheimer’s Munich clinic (headed by Emil Kraepelin) and Fischer’s Prague
clinic (headed by Arnold Pick) predestined animosity. And there was no
collaborative effort to reconcile these observations about TB and Alzheimer’s
disease. Instead the Munich clinic was out for glory and the creation of a
“new” disease to enhance their legacy.
We continue discovering that there are many causes of
Alzheimer’s disease. The disease is a reaction to these many traumas. In
response to this trauma, studies are now strongly pointing to inflammation—a
reaction to these traumas—that causes the damage to brain cells. Inflammation, seen
as a penumbra on imaging techniques, is a shadow of dying cells in the brain.
The question still remains how the inflammation—the penumbra—can be reduced and
eliminated while for others the inflammation continues to grow nonstop. Each
cause of dementia—for example, physical trauma from playing football or TB—will
have its own pattern of progression. And this is the rub.
While federal funds are squandered on looking at the
progression of the disease, the causes of dementia remain in the shadow of the research
spotlight. The outcome of this ignorance is the utter lack of progress made in
the last 100 years and the zero clinical outcomes from forty years of U.S. National
Institute on Aging funding. Zero.
An alternate approach would be to focus on preventive
measures. Not as sexy as “finding the cure” but we can guarantee success on day
one. Diet and exercise, always a good strategy for a fulfilling life, is not
enough. The low hanging fruit would involve protecting the head during contact
sports and other activities where physical trauma eventually leads to dementia.
Better vascular management, treatment and control are a second line of attack
that will significantly reduce dementia rates. The third line of attack is to
understand and control inflammation. It seems contradictory, but overall, in
order to prevent dementia, research needs to move away from dementia and move
again to basic science. Dementia is broader than what our focus has been so far.
Historically politics dictated this narrow approach, but science is pointing in
a different direction, but we seem to remain shackled to the past.
Emerging research shows that one type of trauma that causes
dementia are bacteria, with TB being a very common bacteria agent among humans.
But this is not just about “killing the bacteria.” Bacteria, and especially TB
that we see today are not the same bacteria we saw a hundred or a thousand
years ago. They have evolved with us. And they are still evolving and matching
our development. We are evolving with them both as a species, as a community
(different TBs across the globe) and as we age. This could (partially) explain
why some people can control the spread of the penumbra, the inflammation, while
others relent to its power.
Laura Pérez-Lago, from Madrid General Hospital and her
colleagues found that there are many different types of tuberculosis bacterium
within the same patient. They also found that individuals infected with TB
might have genetics that promote TB to mutate. It seems that we continue
co-evolving with the TB bacterium and some people allow for the bacterium to
change within us while others restrict it from changing. Peng Yi-Hao, along with
the China Medical University Hospital in Taiwan, looked at more than six
thousand patients newly diagnosed with TB patients. Although patients that had
TB were more likely to have other existing health problems—including; irregular
heartbeat (atrial fibrillation), hypertension, diabetes, heart failure, stroke,
depression, and head injury, all of which are correlated with increased risk
for dementia—after controlling for these factors the overall risk of developing
dementia in six years was higher, by an additional one person for every five in
the non-TB patients. Among the patients with TB, men and people between 50 and
64 years were more likely to develop dementia compared to the TB-free group.
Except for the patients with TB, those with a head injury exhibited the highest
risk of developing dementia.
What seems to be emerging is that there is likely a genetic
predisposition to allow TB to mutate and cause damage to many organs in the
body, including the brain. Also with age we become more susceptible to TB and
our inflammation response becomes a greater problem for the brain to cope with.
Nicholas Dunn with the University of Southampton, UK and his
colleagues confirmed this point when they showed that elderly patients with
dementia have a higher ratio of infection episodes in the four years preceding
the diagnosis of dementia. We become
more prone to infections, which causes inflammation which harms us as we age.
The lesson that TB is teaching us is that we need to look at
the many possible ways that the brain can be hurt. Focusing on the trauma that
starts the cascade of inflammation is a sure bet to eventually be able to first
understand the dementia and then perhaps cure it. Like cancer, dementia is
neither simple nor static. The role of TB in causing dementia has waited too
long to be given the importance it deserves.
© USA Copyrighted 2017 Mario D. Garrett
References
Alvarez, P (1919). Relation between tuberculosis and dementia
praecox. Dement. Praecox. Stud, 2, 1-2.
Amor, S., Puentes, F., Baker, D., & Van Der Valk, P.
(2010). Inflammation in neurodegenerative diseases. Immunology, 129(2),
154-169.
Anderson, N. E., Somaratne, J., Mason, D. F., Holland, D.,
& Thomas, M. G. (2010). Neurological and systemic complications of
tuberculous meningitis and its treatment at Auckland City Hospital, New
Zealand. Journal of Clinical Neuroscience, 17(9), 1114-1118.
Broxmeyer, L. (2017). Are the Infectious Roots of Alzheimers
Buried Deep in the Past?. Journal of MPE Molecular Pathological Epidemiology.
Castañeda-García, A., Prieto, A. I., Rodríguez-Beltrán, J.,
Alonso, N., Cantillon, D., Costas, C., ... & Tonjum, T. (2017). A
non-canonical mismatch repair pathway in prokaryotes. Nature Communications, 8,
14246.
Dunn N, Mullee M, Perry VH, Holmes C. Association between
dementia and infectious disease: evidence from a case-control study. Alzheimer
Dis Assoc Disord. 2005;19(2):91-94.
Eikelenboom, P., Hoozemans, J. J., Veerhuis, R., van Exel,
E., Rozemuller, A. J., & van Gool, W. A. (2012). Whether, when and how
chronic inflammation increases the risk of developing late-onset Alzheimer's
disease. Alzheimer's research & therapy, 4(3), 15.
Garrett, M (2015) Politics of Anguish: How Alzheimer’s disease
became the malady of the 21st century. Createspace.
Glass, C. K., Saijo, K., Winner, B., Marchetto, M. C., &
Gage, F. H. (2010). Mechanisms underlying inflammation in neurodegeneration.
Cell, 140(6), 918-934.
Mawanda F, Wallace R (2013) Can infections cause Alzheimer's
disease? Epidemiol Rev 35: 161-180.
Peng, Y. H., Chen, C. Y., Su, C. H., Muo, C. H., Chen, K.
F., Liao, W. C., & Kao, C. H. (2015). Increased Risk of Dementia Among
Patients With Pulmonary Tuberculosis: A Retrospective Population-Based Cohort
Study. American Journal of Alzheimer's Disease & Other Dementias®, 30(6),
629-634.
Pérez-Lago, L., Palacios, J. J., Herranz, M., Serrano, M.
R., Bouza, E., & García-de-Viedma, Dario. (2015). Revealing hidden clonal
complexity in Mycobacterium tuberculosis infection by qualitative and
quantitative improvement of sampling. Clinical Microbiology and Infection,
21(2), 147-e1.
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Tuesday, August 1, 2017
Is Mouth Bacteria Causing Dementia?
In the 1897 fictional book War of the Worlds, H.G. Wells kills off the invading Martians and their gigantic robotic machines, by microbial infection. Two hundred years later we are just now appreciating the power of this microbial world. We have been resisting studying how bacteria influence our behavior, including our mental health, in favor of the obvious low hanging fruit: a malfunction. Areas of study include the gut, but the best way to study bacteria is to look at it as it gets into our system through our mouth. [1]
In 2017 Kenji Takeuchi, with Kyushu University, Fukuoka, Japan and his colleagues reported that people in their 60s, who lost their teeth were more likely to get dementia five years later. And there was a dose effect, with fewer teeth the higher the rate of dementia, peaking at nearly twice as high. Only when older people completely had no teeth did this rate of dementia drop slightly.
What was interesting was that the same result was not found for vascular dementia—when dementia is caused by lack of blood supply to the brain. Having fewer teeth promoted dementia through something other than a problem with blood supply to the brain—the main cause of dementia. Could this be the elusive cause of Alzheimer’s disease?
In a comprehensive review of periodontal disease and its relation to aging, the Brazilian Eder Abreu Huttner and Eduardo Hebling and their colleagues reported that although aging alone does not cause periodontal disease, aging does increase the risk by having less resilience, fostering conditions promoting the disease, and having a biological reaction that is more damaging than for younger people.
Controlling for other effects is difficult. For example Kenji Takeuchi also reported that teeth loss was related to having less than 10 years formal education.. After age, lack of formal education by itself remains the best predictor of dementia. Education has a protective function, perhaps delaying rather than eliminating dementia. Related to education is also income.
In 2008 Nora Donaldson with King’s College London, and her colleagues reported data on 3,817 participants in the UK and found that social economic status had direct influence on the number of good teeth participants had. Richer people made better use of preventive care and also independently had better teeth. There is also a genetic component to teeth loss. With the main contender for dementia being the apolipoprotein E epsilon 4 gene we also find that this gene is also related to teeth loss. All of these factors can moderate and mediate the susceptibility to teeth loss.
Then in 2006 Margaret Gatz with the University of Southern California and her colleagues addressed these factors by using a Swedish study of identical twins. By controlling for most of these social and genetic factors, the authors report that the twin who had tooth loss before age 35 was 5.5 times more likely to develop Alzheimer’s disease. Tooth loss is directly involved in Alzheimer’s disease. We also observe that centenarians—those that have lived to a 100 years and older—and their offspring have slight but significantly better oral health than their respective peers when they were in their early 60s.
Tooth loss can be caused by many factors, but the main contender seems to be periodontal disease. Periodontal disease is caused by bacteria that initially forms a sticky “plaque” which if not removed by brushing can harden and form “tartar” that attacks the gum causing “gingivitis” and eventually infects the tooth and bone as ”periodontitis.” The association of periodontal disease with dementia has been reported in many studies. In one recent 2017 review Yago Leira Feijóo and his colleagues with the University of Santiago de Compostela, Spain concluded that those with severe forms of periodontal disease are nearly three times more likely of getting dementia.
The cause of periodontal disease is primarily bacteria. But the story is more nuanced. There are some 400 bacterial species populating the mouth in symbiosis with some viruses and maybe even fungi. A concoction that is also capable of invading the brain. Although we still do not know how they get there. [2] It could be that the effect on the brain is indirect. Angela Kamer with the NYU College of Dentistry, and her colleagues proposes that it is likely that this mouth cocktail causes an inflammatory reaction throughout the body that also affects the brain.[3] But the brain also has traces of these microbes.
It is surprising to learn that the brain can be infected with the same microbial world that H.G. Wells wrote about 200 years ago. But unlike the story, in reality these microbes are killing humans instead of Martians. Autopsy studies find bacteria, fungi, viruses and a host of other microbial infections in our brain, especially among people that die with dementia. In 2011 Judith Miklossy confirmed these associations when she found that in four out of five autopsied brains of Alzheimer's patient there were spirochetal bacteria that originate in the mouth. [4]
In some cases these infections can be activated—both the rate of infection and the response—when the immune system is compromised through stress or other unknown mechanisms. This initial infection can cause inflammation in the brain and it is this inflammation that attacks the brain from inside. Ruth Utzhaki and her colleagues, in a 2016 review, came up with incontrovertible evidence that Alzheimer’s disease has a microbial component. Although always present, the authors report that this microbial world is woken up by an iron imbalance in the brain. An iron rich brain causes microbes to flourish, causing a reaction. There might be many such tipping points—that awaken this sleeping and toxic world—among older adults.
In fact the hallmarks of Alzheimer’s disease—plaques and tangles—are observed in mice and in cell culture after an infection with herpes simplex virus or bacteria. These plaques and tangles have been found to have anti-microbial function against multiple bacteria, yeast and viruses. In response to a microbial world that exists around and within us. The World Health Organization estimates that 3.7 billion people under age 50 have the non-sexually transmitted herpes simplex virus infection globally. Around a third to half of all adults in developed countries have periodontal disease. So bacteria and viruses are already present, the issue is how does bacteria, in particular, invade and damage our brain.
Bacterial infection is not simple. With periodontal disease, bacterial infection is dependent on the presence of the infection together with the susceptibility of the individual, including a direct genetic susceptibility. However age seems to be the main reason why we become more susceptible to these infections. With greater susceptibility and immune deficiency, older adults are more likely to suffer bacterial infection that results in periodontal disease that promoted dementia. And this is bi-directional, as memory lapses, dental care is further ignored, increasing the continual onslaught of infection in the brain. A central aspect of this theory is that there is a multiplying effect with the infection causing an initial inflammatory reaction in the brain, making it susceptible to more infection. [5]
Since the plaques and tangles are in fact not dead cells as presumed, but very much alive, the idea that the plaques and tangles—characteristic features of Alzheimer’s disease—are protecting the brain seems plausible. Despite the success of drugs eliminating these plaques and tangles there has been no improvement in cognition. As a result there is now enough evidence to accept that the plaques and tangles are a reaction to lesions in the brain rather than what Alois Alzheimer initially proposed as the disease itself. They are brain scabs caused by a brain lesion. Bacterial infection is such one of many such lesions that the brain has to contend with on a daily basis. Bacteria that enters the mouth and is cultivated through periodontal disease is an important sources of infection.
Overall these studies indicate that it is biologically feasible for oral bacteria to go through the bloodstream, reach the brain and either initiate or promote existing lesions and cause an inflammatory response. The brain reacts by protecting itself through inflammation and surrounding the toxic substance with plaques and tangles. If this inflammation mechanism is the cause of dementia then perhaps simple medication can lower the inflammation in the brain.
Jeffrey Rich with the Sentara Cardiovascular Research Institute, Norfolk, Virginia; USA and his colleagues conducted a follow-up study looking at the use of non-steroidal anti-inflammatory drugs (NSAIDs)—include aspirin, ibuprofen, naproxen, COX-2 inhibitors, and other medications They found that the group using the NSAIDs had slower progression of the disease a year after initiating treatment. Although in a much later study, when they performed autopsies on these same patients, the authors reported that some had vascular dementia as well as Alzheimer’s disease (which diffuses the effect of inflammation on Alzheimer’s disease). However the results are still positive. In a review of the literature, the Dutch William van Gool and his colleagues make the argument that the body is maintaining a balance, that not all inflammation is bad, that some of the benefits of these medication might have nothing to do with inflammation and that the timing is important and they might only work at the early stages of the disease.
It seems that we are still on the periphery, searching for answers to a complex disease, in a piecemeal fashion, without coordination. Perhaps we are reaching our own tipping point in science and will have to admit that the body is a supraorganism. [6] The appreciation that other organisms live in harmony with and within us is a finely tuned symphony that aging has a way of disrupting.
© USA Copyrighted 2017 Mario D. Garrett
This blog was initiated by a discussion with Peter Kraus.
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[1]
It has long been known that there is a direct effect of oral bacteria such as Porphyromonas gingivalis and Streptococcus sanguis on induction of platelet activation and aggregation, which in turn contributes to heart disease such as atheroma formation and thrombosis. See earlier blog
https://www.psychologytoday.com/blog/iage/201305/aging-teeth
Also studies have consistently shown that mothers with significant periodontal disease had a 7.5 fold increase in the risk of having a preterm, low birth weight baby.
There is also a relationship between periodontal disease and diabetes, with improved metabolic control seen in poorly controlled diabetics following periodontal therapy.
The periodontal bacterium P. gingivalis has also been linked to rheumatoid arthritis through the enzyme peptidylarginine deiminase.
There is also a relationship between periodontal disease and diabetes, with improved metabolic control seen in poorly controlled diabetics following periodontal therapy.
The periodontal bacterium P. gingivalis has also been linked to rheumatoid arthritis through the enzyme peptidylarginine deiminase.
[2]
Among periodontal bacteria, species such as A. actinomycetemcomitans, P. gingivalis, T. denticola and F. nucleatum are capable of invading the brain.
[3]
This reaction involves; cytokines—substances, such as interferon, interleukin, and growth factors, that are secreted by certain cells of the immune system and have an effect on other cells; and C-reactive protein (CRP)—substance produced by the liver that increases in the presence of inflammation in the body. CRP increases up to 1000 folds in acute inflammatory diseases. These cytokines and CRP stimulate glial cells to produce amyloid-β 1-42 peptide (Aβ42) and hyperphosphorylated tau protein (P-Tau).
[4]
But there is also an indication that the infection can also come from outside infection such as Lyme bacteria.
https://www.psychologytoday.com/blog/iage/201705/the-coming-pandemic-lyme-dementia
[5]
Characterized by the production of high levels of inflammatory mediators such as IL-1, IL-6, IL-17 and TNF-α, and low levels of anti-inflammatory molecules such as IL-10
[6]
We are becoming Gods
https://www.psychologytoday.com/blog/iage/201511/we-are-becoming-gods
Geography of Aging and the Illusion of Self
https://www.psychologytoday.com/blog/iage/201505/geography-aging-and-the-illusion-self
References
Donaldson, A. N., Everitt, B., Newton, T., Steele, J., Sherriff, M., & Bower, E. (2008). The effects of social class and dental attendance on oral health. Journal of Dental Research, 87(1), 60-64.
Gatz, M., Mortimer, J. A., Fratiglioni, L., Johansson, B., Berg, S., Reynolds, C. A., & Pedersen, N. L. (2006). Potentially modifiable risk factors for dementia in identical twins. Alzheimer's & Dementia, 2(2), 110-117.
Itzhaki, R. F., Lathe, R., Balin, B. J., Ball, M. J., Bearer, E. L., Braak, H., ... & Del Tredici, K. (2016). Microbes and Alzheimer's disease. Journal of Alzheimer's disease: JAD, 51(4), 979.
Kamer, A. R., Dasanayake, A. P., Craig, R. G., Glodzik-Sobanska, L., Bry, M., & De Leon, M. J. (2008). Alzheimer's disease and peripheral infections: the possible contribution from periodontal infections, model and hypothesis. Journal of Alzheimer's Disease, 13(4), 437-449.
Leira, Y., Dom’nguez, C., Seoane, J., Seoane-Romero, J., P’as-Peleteiro, J. M., Takkouche, B., ... & Aldrey, J. M. (2017). Is Periodontal Disease Associated with Alzheimer's Disease A Systematic Review with Meta-Analysis. Neuroepidemiology, 48(1-2), 21-31.
Miklossy, J. (2011). Alzheimer's disease-a neurospirochetosis. Analysis of the evidence following Koch's and Hill's criteria. Journal of neuroinflammation, 8(1), 90.
Rich, J. B., Rasmusson, D. X., Folstein, M. F., Carson, K. A., Kawas, C., & Brandt, J. (1995). Nonsteroidal anti-inflammatory drugs in Alzheimer's disease. Neurology, 45(1), 51-55.
Ridley RM, Baker HF, Windle CP, Cummings RM. Very long term studies of the seeding of beta-amyloidosis in primates. J Neural Transm. 2006;113:1243-1251
Sochocka, M., Sobczy_ski, M., Sender-Janeczek, A., Zwoli_ska, K., Bachowicz, O., Tomczyk, T., ... & Leszek, J. (2017). Association between periodontal health status and cognitive abilities. The role of cytokine profile and systemic inflammation. Current Alzheimer research.
Stein, P. S., Scheff, S., & Dawson, D. R. (2006). Alzheimer’s disease and periodontal disease: mechanisms underlying a potential bidirectional relationship. Grand Rounds Oral-Sys Med, 1(3), 14-24.
Takeuchi, K., Ohara, T., Furuta, M., Takeshita, T., Shibata, Y., Hata, J., ... & Ninomiya, T. (2017). Tooth Loss and Risk of Dementia in the Community: the Hisayama Study. Journal of the American Geriatrics
Donaldson, A. N., Everitt, B., Newton, T., Steele, J., Sherriff, M., & Bower, E. (2008). The effects of social class and dental attendance on oral health. Journal of Dental Research, 87(1), 60-64.
Gatz, M., Mortimer, J. A., Fratiglioni, L., Johansson, B., Berg, S., Reynolds, C. A., & Pedersen, N. L. (2006). Potentially modifiable risk factors for dementia in identical twins. Alzheimer's & Dementia, 2(2), 110-117.
Itzhaki, R. F., Lathe, R., Balin, B. J., Ball, M. J., Bearer, E. L., Braak, H., ... & Del Tredici, K. (2016). Microbes and Alzheimer's disease. Journal of Alzheimer's disease: JAD, 51(4), 979.
Kamer, A. R., Dasanayake, A. P., Craig, R. G., Glodzik-Sobanska, L., Bry, M., & De Leon, M. J. (2008). Alzheimer's disease and peripheral infections: the possible contribution from periodontal infections, model and hypothesis. Journal of Alzheimer's Disease, 13(4), 437-449.
Leira, Y., Dom’nguez, C., Seoane, J., Seoane-Romero, J., P’as-Peleteiro, J. M., Takkouche, B., ... & Aldrey, J. M. (2017). Is Periodontal Disease Associated with Alzheimer's Disease A Systematic Review with Meta-Analysis. Neuroepidemiology, 48(1-2), 21-31.
Miklossy, J. (2011). Alzheimer's disease-a neurospirochetosis. Analysis of the evidence following Koch's and Hill's criteria. Journal of neuroinflammation, 8(1), 90.
Rich, J. B., Rasmusson, D. X., Folstein, M. F., Carson, K. A., Kawas, C., & Brandt, J. (1995). Nonsteroidal anti-inflammatory drugs in Alzheimer's disease. Neurology, 45(1), 51-55.
Ridley RM, Baker HF, Windle CP, Cummings RM. Very long term studies of the seeding of beta-amyloidosis in primates. J Neural Transm. 2006;113:1243-1251
Sochocka, M., Sobczy_ski, M., Sender-Janeczek, A., Zwoli_ska, K., Bachowicz, O., Tomczyk, T., ... & Leszek, J. (2017). Association between periodontal health status and cognitive abilities. The role of cytokine profile and systemic inflammation. Current Alzheimer research.
Stein, P. S., Scheff, S., & Dawson, D. R. (2006). Alzheimer’s disease and periodontal disease: mechanisms underlying a potential bidirectional relationship. Grand Rounds Oral-Sys Med, 1(3), 14-24.
Takeuchi, K., Ohara, T., Furuta, M., Takeshita, T., Shibata, Y., Hata, J., ... & Ninomiya, T. (2017). Tooth Loss and Risk of Dementia in the Community: the Hisayama Study. Journal of the American Geriatrics
Sunday, June 25, 2017
Immortality: With a Lifetime Guarantee
Immortality:
With a Lifetime Guarantee
Survival is our final ambition as a species and the only way to survive is to ensure that we are a good fit in our environment. There are two ways to survive as a species. One is to produce an enormous number of offspring and hope that a few survive long enough to pass on their genes. Another approach—one that humans are following—involves having a few children whom we nurture for more than 18 years. Nurturing is an important—and integral—component of our survival strategy. Nurturing involves having things to teach and living long enough to be able to teach them. This involves having a larger brain and longer life—and the two go together. Aging is not a dustbin of genetics, but an integral part of our strategy for survival as a species. With aging also comes the opportunity to learn about the environment. We learn in terms of our skills and also through our biology. As we age we pick-up new genetic material, modify existing genes, and fine-tune them before we pass our genes on to our children. Our lives are devoted to just this aim, except we remain ignorant of this fact for good reason. We create a model of reality in our brain. For us to engage in the world we have to be at the center and we have to believe that we are unique and have a free will. Our impression of reality, dictated by having a world that is just, fair and constant, also requires that we do not think about our own death or our model of the world becomes untenable. This is where our belief in immortality comes in. We want things to stay constant so that we can retain some level of control. Anticipating our death destroys this impression that the world is orderly and just. But there is one problem with this made-up reality, we do eventually get old, frail and die. We point at aging as the culprit. Aging is the problem that we need to solve rather than a survival strategy. But if we understand aging we will understand the tricks of our psychology. By looking across ecological biology, genetics, biology and anthropology we can form an understanding of how aging came about as a positive attribute. With aging came a whole new dimension of human development. A life-long symphony is playing, that has a beginning, a middle and an end. It is not just about tweaking genetics, or taking supplements, or curing aging. Our aging is an integral part of our environment and our history. We are meant to die, as much as it is detrimental to the individual, aging and death form our strategy as a species. Our personal salvation is that we delude ourselves this reality.
https://www.createspace.com/7082507
With a Lifetime Guarantee
Survival is our final ambition as a species and the only way to survive is to ensure that we are a good fit in our environment. There are two ways to survive as a species. One is to produce an enormous number of offspring and hope that a few survive long enough to pass on their genes. Another approach—one that humans are following—involves having a few children whom we nurture for more than 18 years. Nurturing is an important—and integral—component of our survival strategy. Nurturing involves having things to teach and living long enough to be able to teach them. This involves having a larger brain and longer life—and the two go together. Aging is not a dustbin of genetics, but an integral part of our strategy for survival as a species. With aging also comes the opportunity to learn about the environment. We learn in terms of our skills and also through our biology. As we age we pick-up new genetic material, modify existing genes, and fine-tune them before we pass our genes on to our children. Our lives are devoted to just this aim, except we remain ignorant of this fact for good reason. We create a model of reality in our brain. For us to engage in the world we have to be at the center and we have to believe that we are unique and have a free will. Our impression of reality, dictated by having a world that is just, fair and constant, also requires that we do not think about our own death or our model of the world becomes untenable. This is where our belief in immortality comes in. We want things to stay constant so that we can retain some level of control. Anticipating our death destroys this impression that the world is orderly and just. But there is one problem with this made-up reality, we do eventually get old, frail and die. We point at aging as the culprit. Aging is the problem that we need to solve rather than a survival strategy. But if we understand aging we will understand the tricks of our psychology. By looking across ecological biology, genetics, biology and anthropology we can form an understanding of how aging came about as a positive attribute. With aging came a whole new dimension of human development. A life-long symphony is playing, that has a beginning, a middle and an end. It is not just about tweaking genetics, or taking supplements, or curing aging. Our aging is an integral part of our environment and our history. We are meant to die, as much as it is detrimental to the individual, aging and death form our strategy as a species. Our personal salvation is that we delude ourselves this reality.
https://www.createspace.com/7082507
Monday, May 29, 2017
The Coming Pandemic of Lyme Dementia
There are many known causes of dementia. One of these causes are bacteria. Bacteria are usually ignored despite its historical and current significance in dementia research. A hundred years ago it was well known that syphilis—a bacterium—was the only known cause of dementia. The bacteria interferes with the nerves until it reaches the brain where it destroys the brain from the inside. In the end, the expression of long-term syphilis is dementia—Neurosyphilis. Alois Alzheimer wrote his post-doctoral thesis (Habilitationsschrift) entitled “Histological studies on the differential diagnosis of progressive paralysis.” on neurosyphilis before his supervisor Emil Kraepelin propelled him into the history books by defining Alzheimer’s disease as a new disease in 1911. [1]
Neurosyphilis was very common in the 1900s. Between one in four to one in ten people in mental institutions were there because of neurosyphilis. Eventually syphilis kills its victims. Before the introduction of penicillin in 1943, syphilis was a common killer. In 1929, among men, the death rate from syphilis was 28.3 per 100,000 for Whites and 97.9 per 100,000 for Blacks [2]. The similarities between syphilis and dementia were addressed repeatedly in the early literature in Alzheimer’s disease [1]. Because syphilis can now be treated easily and cheaply, it has nearly been eradicated. But there is a new bacterium threat emerging—one that can also cause dementia.
Today, the main bacterial threat to acquiring dementia comes from Lyme disease—a bacterium borrelia burgdorferi. Lyme disease is transmitted to humans through the bite of infected blacklegged tick. These ticks are themselves infected by feeding off diseased insects and birds, which bring the infection from across the globe. Worldwide there are 23 different species of these Lyme disease-carrying ticks.
Lyme disease is the most common disease transmitted by animals in the northern hemisphere and it is becoming an increasingly public health concern [3]. Not only because Lyme disease is a debilitating disease, but because eventually Lyme disease has been shown to cause dementia—Lyme dementia [4]. Science has not identified the mechanism for the development of Lyme dementia. The American psychiatrist Robert Bransfield has been documenting some of its neurological expressions, but so far there is a lack of emphasis in the research community on exploring these clinical features. There is great resistance by the U.S. Center for Disease Control and Prevention (CDC) to acknowledge the importance of this infection.
Ernie Murakami, a retired physician, has been monitoring the spread of Lyme disease across the world. With more than 65 countries that have the blacklegged ticks which transmit Lyme disease. This is a worldwide pandemic.The prevalence of Lyme disease reporting varies dramatically, primarily we are not looking for it. Canada reporting the lowest cases in the world, with 1 case per million, while Slovenia reports 13 cases per 10,000. In the United Sates the CDC reports that more than 329,000 people are likely to be infected every year in the U.S. alone. Only one in ten cases are reported since clinicians are not looking for Lyme disease. This estimated number of annual infections is higher than hepatitis C, HIV, colon cancer, and breast cancer. Lyme disease accounts for more than 90% of all reported cases of diseases transmitted by animals (vector-borne illness).
With any good public health strategy there needs to be a two pronged response--prevention and control: addressing the clinical effects of the disease and the underlying cause. In the United States, although there are minimal research funds to examine and explore cures for Lyme disease, this avenue is likely to see the most significant increase in funding. But this would be folly without addressing the underlying cause of the disease. Addressing these underlying causes will however be challenging.
Harvard Medical School Center reports that areas suitable for tick habitation will quadruple by the 2080s. But there are more pressing changes that will happen in our lifetime. Deforestation and climate-induced habitat change are affecting insect which carry diseases like malaria and Lyme disease. Slow climate change, urban growth in areas next to forests, reforestation following the abandonment of agriculture, and increases in the deer, mice and squirrel populations (among many others) which harbor these ticks.
Malaria and Lyme disease are both projected to increase. Even taking a more conservative estimate (all of the USA, most of Canada, all of Europe, Middle East and China), more than half the world’s populations are exposed to Lyme disease. A proportion of these populations will become infected with Lyme disease and eventually some will develop dementia. Pure Lyme dementia exists and reacts well to antibiotics [4]. Is public health ready to address this?
© USA Copyrighted 2017 Mario D. Garrett
References:
[1] Garrett MD (2015) Politics of Anguish: How Alzheimer's
disease became the malady of the 21st century. Createspace. USA.
[2] Hazen H.H. (1937). A leading cause of death among
Negroes: Syphilis. Journal of Negro Education, 310-321.
[3] Pearson S. (2014). Recognising and understanding Lyme
disease. Nursing Standard, 29(1): 37-43.
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[4] Blanc F., Philippi N., Cretin B., Kleitz C., Berly L.,
Jung B., ... & de Seze J. (2014). Lyme Neuroborreliosis and Dementia.
Journal of Alzheimer's Disease, 41(4): 1087-93.
Monday, May 1, 2017
Learning about Aging through Film: The Narrative Arc
The use of film to explore concepts in gerontology. This is one of a
series of five lectures on the role of film in gerontology. Spoiler alerts, if
you have not seen these films, this analysis necessitates exposing the plot.
These notes are intended for you to click on the movie trailer sequentially with
the analyses.
The narrative arc in film is a static story board of how a
story evolves and develops, both evident as well as imagined. How older people are
portrayed in film is best described through the interpretation of this narrative
arc. An arc is the linear development of a story—a beginning, a middle and an
end. An alternate method of analyses
would be through the more limited interpretation of context, character,
symbolism, and other constructs.
One of the first films describing a simple story about older
people is the 1952 Japanese film Ikiru
by the acclaimed director Akira Kurosawa—acclaimed for the Seven Samurai, Rashomon,
and Ran. Ikiru has a fairly simple narrative
arc. A bureaucrat, on the cusp of retirement, is informed that he has terminal
cancer. The narrative arc focusses on the main character in the film attempting
to find meaning and leaving behind a legacy in his life before he dies.
This simple story highlights that after one’s entire life spent
doing what you are supposed to do—work, maybe family—that at the end what is
important is relationships. At the end, he finds some solace among his younger
mates, where he finds friendship.
This narrative arc, an old man at the end of life, was
further developed by another seminal director, Ingmar Bergman who in 1957 wrote
and directed Wild Strawberries.
Filmed in black and white, perhaps in homage to Ikiru, the film goes further in search
of the meaning of one’s life and leaving a legacy. Following a fairly similar
story of an accomplished bureaucrat—this time a professor—Wild Strawberries explores the question of what was it all about?
The lost meaning is a reflection that the character’s internal story did not go
far enough to include getting old. We do not have ambitions for getting old,
and once we get there, we remain without a plan. Wild Strawberries has been described as Bergman’s attempt to justify
himself to his own parents. The narrative arc told through actual and dream
experiences, mixes ghosts, fantasies and reality. Admired but not loved, the
protagonist starts to explore what the continuation of his story in older age
should be. Like Ikiru, relationships seem
to be the answer.
Such a conclusion is not far-fetched from what we observe at
the end of life.
In 2012 Bronnie Ware, an Australian palliative care nurse, wrote
The Top Five Regrets of the Dying: A Life
Transformed by the Dearly Departing. Our two male protagonists in Ikiru and Wild Strawberries follow these regrets. These misgivings focused on
having unfulfilled dreams and unrequited loves. Not having the courage to
follow their dreams, where (mostly) men tended to regret working so hard. Stifling
feelings in order to settle for a mediocre existence. And not staying in touch
with their friends, and loved ones. And the final regret is not allowing
oneself to be happy. They got stuck in a rut. The agreement between the
narrative of these two films and the five regrets of dying people is stunning.
The films’ narrative arc, from a negative view of aging, exposing
a slow hemorrhaging of life force, the story transforms to positive highlights
of friendship and family. That it is not too late to address these regrets. But what if this transformation did not take
place? If the dystopian view of aging remains without the salvation of a
new-found narrative what would be the result? This is the story of the two
protagonists in the 2015 Italian film Youth.
Paolo Sorrentino’s film centers on two close friends sharing
a vacation at an exclusive Swiss spa. The two protagonists are, a director who
continues producing the same kind of films, surrounded by increasingly younger
writers. While the other protagonist is a music composer who has decided to
retire. What we have to work out is that the composer stopped composing—to the
chagrin of many—because of his wife’s dementia which he hid from everyone
including his daughter. He has made changes to address this trauma and his
aging. Negative events in life change our narrative arc. In contrast, the other
character, the director, only had one story—to remain doing what he did in the
past. He did not have a different story for when he got old, and the quality of
his work diminished. At the end, his suicide was the only answer to his failing
career since he did not have a plan B, an evolving narrative arc. We have a
starkly different outcome for what is portrayed as equally successful early
careers.
This theme of different projections of the story line is best seen in the whimsical 2013 documentary, directed by Zachary Heinzerling, on Cutie and Boxer. Two married aging Japanese visual artists, living in New York city, where one reached their azimuth of success a few decades ago, while the unknown and subservient wife is launching her trajectory of ascendence in her narrative arc.
https://www.youtube.com/watch?v=YXS6Aby5AUg
This theme of different projections of the story line is best seen in the whimsical 2013 documentary, directed by Zachary Heinzerling, on Cutie and Boxer. Two married aging Japanese visual artists, living in New York city, where one reached their azimuth of success a few decades ago, while the unknown and subservient wife is launching her trajectory of ascendence in her narrative arc.
https://www.youtube.com/watch?v=YXS6Aby5AUg
Cinematographically, a narrative arc can also be reversed. This
is the beauty of film, we can explore the importance of a narrative arc by
manipulating the sequence. This is a popular method in film, to imaging that a
life’s story can go backwards or stay static, anchored to a particular age
where you do not have to have a narration for an older age.
The digital masterpiece of the 2008 The Curious Case of Benjamin Button directed by David Fincher—of
the fame, Fight Club, Se7ev, and Gone Girl—is based on the premise that while
the main character is born old and starts becoming younger, everyone else gets
older and dies. The only connection the main character develops in the film, is
when his (descending) timeline converges with another character’s (ascending) timeline.
This is the meaning of the story, that a meaningful relationship is shared with
people in similar (time) context.
This theme is again is explored in the later 2015 film the Age of Adaline by Lee Toland Krieger
where the main character is involved in a car accident resulting in a traumatic
physical shock that enigmatically stops her aging.
The story focusses on two aspects of how meaningful
relationship is shared with people in similar (time) context, when she experiences
the aging and ultimate death of her daughter and the aging of her lovers.
What if you can go back and change your narrative arc. What would you choose? In Francis Ford Coppola’s 2007 Youth without Youth an older man is struck by lightning and starts to regress into his past. Not only was he getting younger, as the cases with The Curious Case of Benjamin Button, in his mind time was flowing back as well. This is the proverbial what would you do if you had to do it all over again.
Another technique used in film is to explore the “What If?”
question. Made in 2009 Mr. Nobody was
written and directed by Jaco Van Dormael. In this science fiction world where
the last mortal is about to die at age 118, the protagonist explores three options
that he could have made differently. Would the narrative arc result in a better
outcome at the end of life?
In the end, the protagonist acknowledges that although every
choice he has made had far reaching results in the future, ultimately none of
the choices are good or bad. The interpretation is that as long as we make
allowance for getting old everything will turn out well. Each will option will
result in slightly different outcomes but all will have a coherent story. The
narrative arc is written as we live life, and sometimes we are just too “busy”
to envisage that anything will change. Despite us knowing, intellectually at
least, that everything changes all the time.
A limited narrative arc, one that is missing a component for
later life, relegates older age to a dystopian existence. Only by having an
internal narrative that includes future dreams can there truly be a fully lived
life. What better than a story of Burt Munro, a New Zealand amateur
motorcyclist who wanted to break the world speed record and in so doing ignored
age completely. This is the adaption of his story: The World’s Fastest Indian.
It took 20 years for the New Zealand director Roger
Donaldson to make this film. In it, the protagonist narrative arc is changed
when he tells of the death of his brother Ernie by a fallen tree—and, in Burt
Munro’s real life, his stillborn twin sister—which changes the real life Burt
Munro’s story and view of life. Negative events in life change our narrative
arc. The beauty about this film is that the narrative arc ignored age
completely. Suffering from angina and later a stroke in 1977, the real Munro at
the age of 68 while riding a 47-year-old machine continued to set world speed
records for 1,000 cc bikes. He did not use his experiences to dictate his age
and his narrative arc did not stop at older age. He had his own ongoing story.
In the film although there are characters that try and stop him from pursuing
his narrative, the protagonist simply ignored them. Some of us are not so
lucky.
Where we collude in this restriction is that we promote a
restricted narrative arc for older people. Do a little exercise for me.
Let’s imagine that you have a 100-year-old woman that you
are going to interview. What is the single question that you will ask her.
Write it down.
Then assume that you have a 16year-young girl coming to be
interviewed. What single question would you ask?
Write that down.
The prediction is that you probably ask the older woman
about her past and the younger woman about her future. You have already hemmed
them into you view of what their narrative arc should be. With this knowledge
in hand, let’s review a recent interview with Jerry Lewis.
An awkward exchange where Jerry Lewis’s narrative arc focusses
on the future while the reporter is trying to force him—unsuccessfully, to the
great strength of Jerry Lewis—to focus on his past.
To age successfully we must not only have a story that goes
beyond adulthood—to extend into older adulthood—but we must also be vigilant
against those who unintentionally try and demolish our narrative for living in
older age, by translating it to “old” age. Our narrative arc is important
because it is how we conduct our life, including into older age.
© USA Copyrighted 2017 Mario D. Garrett
© USA Copyrighted 2017 Mario D. Garrett
Saturday, April 1, 2017
Big Pharma Against Dementia
The World Alzheimer Report of 2011 reported that we do not
know the benefits of screening and early diagnosis of dementia. We all assume
that people should be checked early for dementia, but we do not know whether
there is an advantage to be diagnosed with the disease. There are definitely
negative repercussions—losing your driving license, right to conduct
professional duties, enter into financial agreements, and sometimes even the
right to conduct your own affairs. It seems that once you get diagnosed with
dementia then you are left to fend on your own with your loved ones if you have
any.
There is a disconnect between diagnoses—the identification
of the disease—and prognosis—forecasting the progression of the disease and
suggested treatment, therapy or support services. In the field of dementia, as
with other diseases especially cancer, there lies an expectation that an early
detection brings better outcomes: You live longer with less pain. But the
reality is very different. New emerging research shows that our ambition to
help dementia patients because of an early diagnosis is failing miserably.
In a French study in 2015, Clément Pimouguet and his
colleagues reported that people with dementia who had consulted a specialist at
the start of their disease, died earlier than those who only saw their general
practitioner (GP) or did nothing. Sadly they found that there was no difference
between participants who visited their GP and those who went without any
clinical care. Although those that went
to see a specialist had much faster functional decline, their thinking ability
was not much different from the other group. Why would seeing a specialist
increase your likelihood of dying?
The lack of follow-up by the specialist was one of the
reasons given for the higher rate of death. In 2017 Paula Rochon and Jeremy Matlow and colleagues in Toronto,
Ontario, reported that half of 2,998 nursing home residents with dementia were
still getting questionable medication in their last year of life. These medications might have had some benefit
at the early stages of the disease but definitely have negative affect on the
wellbeing of these confused patients. That a third of the residents did not see
a specialist in the last year of life suggests that the medication was
prescribed earlier on in the diagnosis and had not been reviewed since. Regular
medication reviews will help to curtail unnecessary prescriptions.
It is likely therefore that too much and inappropriate
medication is a culprit. In France only the specialist can prescribe drugs and
this study found that half were prescribed antidementia drugs (46.2%); while
the rest 12% prescribed antipsychotic drugs, 28% anxiolytic drugs, and 9% took
psychostimulant. It is only when the diagnosis of dementia was vascular
dementia and where some fo these drugs are not to be prescribed that seeing a
specialist was found to be beneficial. Amelie Bruandet with the university of
Lille, France and her colleagues found that with vascular dementia the shorter
the delay between first symptoms and first visit, the longer patients survived.
It could be due to medication, specialist do not prescribe medications that are
killing dementia patients earlier.
It seems that we do not have any medication for dementia
that is both effective and safe. In fact, all evidence points to dementia
medication as being ineffective and in most cases dangerous. A conclusion that
was arrived at by a 2014 study by two Dartmouth professors Steven Woloshin and
Lisa Schwartz reporting for Consumer Reports. In addition to their
costs—ranging on average $177-$400 a month—there was not one drug that they
could recommend. Not one drug.
The logical assessment would be that since physicians have
no medication to provide patients with dementia then following the Hippocratic
Oath and “first, do no harm,” no medication should be prescribed. But a 2015 study of elderly patients showed
that anticholinergic medications given to patients with dementia—including
antimuscarinics, tricyclic antidepressants, and first-generation
antihistamines—are associated with an increased risk for dementia. Drugs being
prescribed have an established evidence to increase dementia. Sometimes this
dangerous medication is given for non-life-threatening disease such as
overactive bladder. Christian Meyer from the University Medical Center
Hamburg–Eppendorf in Germany, and his colleagues reported that more than
one-quarter of older Americans with overactive bladder are given a prescription
for oxybutynin, and one-third are given a refill, despite the established link
between this drug and cognitive dysfunction in the elderly. In a 2015 survey of
Medicare patients with dementia more than one in four were being prescribed
"potentially inappropriate" anticholinergics.
The overuse of prescription of medication among older
patients is ageist. We need to address this final bastion of stereotyping. We
know that younger people with a similar disease are more likely to get therapy.
But there is another negative consequence of this lack of knowledge. Physicians
become shy at making prognoses. Although diagnosis is relatively easily, they
can easily say it is Alzheimer’s disease or Vascular dementia without any
liability issue, and most do despite evidence that they are likely to be
wrong. The patient is seriously sick, we
can all see that. But once physicians start to define a timeline or sequence of
how the disease will enfold, then they become exposed not only to the patient,
but more importantly to the patient’s family, their medical institutional and
legal liability.
In a short paper, Sonali Wilborn, and Navdeep Grewal, with
Seasons Hospice and Palliative Care, Madison Heights, Michigan USA found that
predicting mortality using current prognostic guidelines, fails in
approximately a third of Alzheimer’s patients. Nicholas Christakis, a hospice
physician takes it much further. He rightly laments the neglect of prognosis in
medicine. Making a prognosis is messy and inaccurate. In 2000, he reports a
study where only one in five timelines were accurate in forecasting death, more
than half were over-optimistic while one in six were over-pessimistic. Being
over-optimistic ensures that patients delay too long in sorting out their
affairs.
The symbol of medicine is the rod of Asclepius—which has a
snake coiled around a cane. It is carried by the Greek god Asclepius, a deity
associated with healing and medicine. It is often confused with the caduceus
which has a very different meaning.
The caduceus—depicting two snakes wrapped around a winged
rod—is carried by Mercury the mythical messenger of the gods. Mercury is the
guide of the dead and protector of merchants, shepherds, gamblers, liars, and
thieves. In dementia care we might be confusing both the symbol and the objectives
becoming the protectors of big pharma: merchants, gamblers, liars, and thieves.
The abuse of older patients with dementia remains an unwritten chapter in the
low point of medicine.
© USA Copyrighted 2017 Mario D. Garrett
Bruandet, A., Richard, F.,
Bombois, S., Maurage, C. A., Deramecourt, V., Lebert, F., ... & Pasquier,
F. (2009). Alzheimer disease with cerebrovascular disease and vascular
dementia: clinical features and course compared with Alzheimer disease. Journal
of Neurology, Neurosurgery & Psychiatry, 80(2), 133-139.
Pimouguet, C., Delva, F.,
Le Goff, M., Stern, Y., Pasquier, F., Berr, C., ... & Helmer, C. (2015).
Survival and early recourse to care for dementia: A population based study.
Alzheimer's & Dementia, 11(4), 385-393.
Rait, G., Walters, K.,
Bottomley, C., Petersen, I., Iliffe, S., & Nazareth, I. (2010). Survival of
people with clinical diagnosis of dementia in primary care: cohort study. Bmj,
341, c3584.
© USA Copyrighted 2017 Mario D. Garrett
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