A Look at Alzheimer’s Disease
On Wednesday, June 10, 2015 I hosted a viewing of the movie Still Alice in my office as a vehicle to
broach the subject of Alzheimer’s disease (AD) with my community. The movie was absolutely riveting and
Julianne Moore’s portrayal of an intellectual woman succumbing to early-onset
AD could not have been more poignant. In
the movie Ms. Moore portrays a linguistics Professor who teaches at Columbia (the
Ivy League position supports her academic prowess). During the course of the movie she gradually
loses her ability to recall course material, encounters with new people (eg. her son’s new girlfriend), the
location of the bathroom in her summer home and eventually, her ability to
recognize one of her own daughters. As a college professor myself, I found it
particularly straining to see her lose her faculty position after her students submitted
a complaint for delivery of confusing lecture content and lack of preparedness.
Although Alzheimer’s disease is a concern for all aging populations
the Early-Onset or Familial form of the disease is
relatively rare, accounting for only
5-10% of all Alzheimer's cases. It is
caused by genetic mutations that accelerate the production of plaques in the
brain, ultimately leading to profound neurodegeneration. As we learn in the movie genetic testing is
available so two of Alice’s three adult children get tested. Her youngest daughter learns that she is a carrier
which means that she too, will be affected by this form of Alzheimer’s disease,
and her children will have a 50% chance of inheriting the disease as well.
Since there is no
cure for Alzheimer’s disease the decision to be tested is not an easy one. Even James Watson, a Nobel Laureate, who
co-discovered the structure of DNA, refused to divulge his AD status after publishing
the entire sequence of his genome. During
the movie I could not help but notice that we never really observe any significant
therapeutic intervention for Alice.
There is a brief mention of some of the therapeutic targets that are the
focus of current R&D efforts but the actors never show Alice undergoing any
sort of treatment. Having spent decades
working in the Pharmaceutical Industry on these targets, I can assure you that we
are a long way off from developing a treatment that can reverse the neurodegeneration
caused by plaque buildup in the brains of AD patients.
The two main
pharmaceutical agents currently prescribed for AD are Aricept and Namenda,
agents that are vaguely palliative but certainly not curative. Recent clinical trials on drug entities that
inhibit plaque buildup have not demonstrated measurable efficacy in patients
with frank AD. Clinical efforts are now focused
on treating patients who are “prodromal” i.e.
before they are cognitively impaired. However,
this can be as long as 30 years before Alzheimer’s disease is officially
diagnosed. Prodromal treatment is a perfectly fine option for someone like Alice’s
daughter who carries the gene for Familial AD but not an acceptable option for
the majority of cases.
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