|
Page 5
Page
1 - 2 -
3 - 4
- 6 -
7 - 8
- 9 -
10 - 11 -
12 - 13

On this side-by-side
comparison we show the total UPDRS change over the six-month period of
the trial for the cohort, compared to one measurement which is a measure
of tremor by a little gadget, loaded into computer. The rate of change
on the right side is promising to be a whole lot more sensitive and more
objective, than the current method that we measure.
So this
can be done, and it should be done. And by the way, in the big scheme of
research spending in the medical field, it's not very expensive. The
whole thing took about two years to develop, and give or take $2
million, to do -- to design and to run.
That's issue number one,
the speed of information turns. The second one is even more interesting
from my perspective, and that’s the subject of failure. The most
important characteristic of failure is that it is a golden nugget,
something that one should polish, put under a magnifying glass, analyzed
--because we don't know what you're going to find when you take the dirt
off.
Let me tell you a story.
Back in 1969, a young engineer working at Intel was given the assignment
of figuring out why the insulator layer -- that is an integral part of
every semiconductor device made since the 60s -- every once in a while
allows electric current to go through. And you would think that maybe
the insulator has broken down. We looked for evidence of that
but found that the
insulator’s good, yet in some conditions the current went
through again. We look again - insulator’s still good. Making a long
story short, this engineer came around and scratching his head reported,
“I think we see tunneling through the insulator.” Tunneling is one of
those magic quantum mechanical words that is sort of like a fourth
dimension, and the space/time curvature - it doesn't mean anything to
anybody who is not in the priesthood of quantum mechanics.
[Laughter]
It is not a destructive
phenomenon. It's a very special way insulators can allow electricity to
pass through.
We thought the guy was on
the controlled substances in the 1970s.
[Laughter]
He wasn't. It turned out
that he was correct. His device turned out to be THE basis of all
so-called non-volatile memories which are in computers, every cell
phone, every digital camera. The memories in each of these are
implemented with a variation of this device. Every MP3 player also came
out of the golden nugget of tunneling through the insulator. That's
what can happen when we analyze failure.
Now I'm going to run
through the story of GDNF, which is a growth factor protein that in 2003
was shown by a British neurosurgeon in an open-label trial to have
clinical effectiveness. This lead to a placebo controlled, randomized
trial, by the manufacturer of the drug, Amgen. We all know a protein
doesn't penetrate the blood-brain barrier. If we want to get it to a
particular place in the brain, we can't use the vascular system, we have
to mechanically get it there. The protein was delivered with a form of
infusion: a cannula introduced mechanically through a hole in the skull
to the appropriate region and the protein in a suspension was pumped
under pressure to this region. They called this kind of flow
“convection”. The original paper describes this phenomenon as shown
here:

Continued: Page
1 - 2
- 3 - 4 -
6 -
7 - 8
- 9 -
10 - 11 -
12 - 13
|