“The Heartbreak and Hazards of Alzheimer’s Caregiving”

“Scientific American” published an article about Alzheimer’s caregiving. Despite the title, I think the article applies to caregiving of anyone with a neurological disorder and perhaps all caregiving! Here are some excerpts.

Excerpt: 

The vast majority of caregivers know full well that their spouses or parents are ill, yet they still behave in ways they know are counterproductive: arguing, blaming, insisting on reality, and taking symptoms personally. Yes, Cathy understood that she was dealing with a disease, with someone suffering from delusions and hallucinations, but when Frank [with Alzheimer’s], panicked by imaginary thieves, refused to crack open a window, Cathy [his wife] fumed with resentment, and that feeling gradually overcame her desire to be understanding and reasonable. … [Frank] lost his ability to see his wife as a complete person.

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Should someone without symptoms but biomarkers be diagnosed with AD?

There is an effort underway to define “prodromal” or “preclinical” Alzheimer’s disease (AD).  If someone has particular biomarkers (including tau in cerebrospinal fluid and amyloid seen on a special PET scan) but no memory loss (or other clinical symptoms of Alzheimer’s), there is a proposal to diagnose these people as having “Alzheimer’s disease.”

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PART (primary age-related tauopathy) research

One of Brain Support Network’s missions is to facilitate brain donations around the US for various neurodegenerative disorders and healthy controls.  A good percentage of the neuropathology reports are returned with the finding of primary age-related tauopathy (PART).  PART is a disorder of the protein tau.  To be diagnosed with Alzheimer’s disease (AD), one must have both tau tangles and amyloid plaques.  In PART, only the tau tangles are present.  And the tau tangles are in the medial temporal lobes.  PART is *only* diagnosed through brain donation or brain autopsy.

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Brain donation makes possible research on LATE pathology

Brain Support Network has helped over 1400 families with brain donation.  Many times, the neuropathology report shows that the donor had a pathology called LATE, which stands for limbic predominant age-related TAR DNA-binding protein 43.  LATE pathology often co-occurs with other pathologies. Recently, the journal “Neurology” published some research about LATE, based on brain autopsies.

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“Common thread, silver bullet, naïve hope?” (Dr. Golbe’s musings)

Dr. Larry Golbe, a world-renowned expert on progressive supranuclear palsy (PSP), has his own blog (psp-blog.org) to which he occasionally publishes insights into the latest research.

In late March 2022, he published about two papers he read on the protein TMEM106B.  He says, “This stuff is known to be a component of healthy lysosomes and endosomes, components of the cell’s garbage disposal mechanism.”

[One paper] found that the brains of healthy elderly persons have abnormal aggregates of a misfolded form of the protein TMEM106B.  These abnormal aggregates were found “even more abundantly in a raft of neurodegenerative diseases: Alzheimer’s, CBD, multiple types of FTD, Parkinson’s, dementia with Lewy bodies, multiple system atrophy and multiple sclerosis.”

The second paper (authors from Columbia University, Mayo Clinic Jacksonville, etc) “found the same TMEM106B aggregates” in those with PSP.

Dr. Golbe says,

An interesting finding is that unlike tau, TMEM106B misfolds the same way in all the diseases analyzed so far.  This may have huge potential implications: if (and this is a big “if”) the misfolded TMEM106B plays an important role in the formation of the misfolding and toxicity of tau and the other disease-specific proteins, and if (another big “if”) this misfolding is the rate-limiting step in the loss of brain cells in the neurodegenerative disorders, THEN preventing TMEM106B from forming or from misfolding, or targeting it with antibodies or drugs could be the silver bullet that prevents all of these diseases, PSP included.  That could be a naïve hope…

Read Dr. Golbe’s blog post:

“Common thread, silver bullet, naïve hope?”
Dr. Larry Golbe
March 16, 2022

Let’s hope!