welcome to the organic green doctor blog

i am a family physician who was diagnosed with
early mild cognitive impairment(mci) amnestic type on december 21, 2010
this is a precursor to alzheimers disease
because of this diagnosis i have opted to stop practicing medicine
this blog will be about my journey with this disease
please feel free to follow me along this path
i will continue blogging on organic gardening, green living,
solar power, rainwater collection, and healthy living
i will blog on these plus other things noted to be interesting

Friday, December 13, 2013

bbb bace



bbb for those not in the medical field
means blood brain barrier
its a protective barrier that keeps drugs medicines
viruses bacteria parasites and chemicals from reaching
the brain and causing havoc

a protective mechanism that has evolved to protect the brain

it also prevents however medicines sometimes from reaching
the brain that may be helpful eg in preventing and treating
alzheimers disease

in a study at the university of pennsylvania they used ctb (cholera toxin b)
that easily goes across the bbb
they then attached mbp (myelin basic protein) to the ctb
mbp degrades beta amyloid

they then attached fluorescence to the ctb-mbp and the
mbp appeared in the brain as seen by the fluorescence in the brain
and the level of that awful beta amyloid that is thought to be the
cause of alzheimers as it accumulates or the end result of
whatever the process is that causes alzheimers
went down as the mbp degraded the beta amyloid

so you could take a chemical that treats alzheimers and
attach it to ctb
give it to a patient by mouth
the drug would then cross the bbb and slow down the production
of the amyloid that may cause alzheimers disease

this was done in rats of course
next stop hopefully is humans

bace is the abbreviation for beta site app cleaving enzyme
the bace enzyme breaks off the protein that may be the culprit
in alzheimers disease
the beta amyloid protein
people who have a defect or mutation in the gene that makes
have a lower instance of alzheimers disease

in comes the drug companies
they have made eg merk a compound called mk-8931
that inhibits this bace enzyme

its an oral drug that has already gone through phase 1 studies
and is now entering phase 2 and phase 3 studies in patients
with mild to moderate alzheimers disease
the drug will lower the levels of beta amyloid in the brain and hopefully
by doing this will slow down or prevent alzheimers disease
thats the theory

now the mk-8931 will be used in prodromal or prealzheimers or
amnestic mild cognitive impairment in patients who may have
a positive beta amyloid pet scan and abnormal levels of beta
amyloid in the spinal fluids
two positive tests that are seen in alzheimers disease

hum that sounds familiar
oh wait thats me
i have all those things except i dont have my beta amyloid pet scan
yet but i will soon
the thinking is to attack this early on in the  process before
things get worse

if i qualify for this study then i would take this mk-8931 for a
period of time and they would follow cognitive tests and spinal
fluid levels of beta amyloid and pet scans of the brain for
beta amyloid
i would be in the placebo group
that would suck wouldnt it to be in the placebo group

there is progress being made it seems
there is this light in the end of the tunnel that is faint
but its starting to get a little brighter

Dr. Dewayne Nash, from the organicgreendoctor.com team
and his Walk buddy!

the organicgreen doctor

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