172
The Body Electric
bone with positive current. This idea turned out to be quite wrong, but
we'll get to that story in due time.
Joe, who was always fascinated by the history of science, now found
that none of the contemporary research groups had been the first to
stimulate bone repair electrically. We'd all been beaten by more than
150 years. Back in 1812, Dr. John Birch of St. Thomas' Hospital in
London used electric shocks to heal a nonunion of the tibia. A Dr. Hall
of York, Pennsylvania, later used direct current through electroacu-
puncture needles for the same purpose, and by 1860 Dr. Arthur Garratt
of Boston stated in his electrotherapy textbook that, in the few times
he'd needed to try it, this method had never failed. Because of the prim-
itive state of electrical science then, we didn't know how much current
these doctors had used. However, the polarity didn't seem to matter,
and they used gold electrodes, which were nearly as nontoxic at the
positive pole as silver.
Realizing that we still didn't know as much as we'd thought about
the growth control lock, we continued to ply the silver key. At least
seventy patients with bone infections have now had the silver nylon
treatment, including twenty at Louisiana State University Medical
School in Shreveport, where Andy Marino ended up after the closing of
our lab in 1980. In some of our first cases we noticed a discharge exud-
ing from the tissues and sticking to the mesh when we changed the
dressings. We thought it was "reactive" exudate—from irritation by the
current—until one day when, during a slight delay in the operating
room, I sent a sample of it to the pathology lab. It was filled with such a
variety of cells that we had to rule out a simple response to irritation.
Instead there was a variety of primitive-looking cell types, looking just
like the active bone marrow of children. However, the patients were
long past that age, and, besides, their marrow cavities were closed off
with scar tissue from their unmended and infected bone injuries. We
had to consider another source.
The exudate appeared at the same
time as the granulation tissue,
which is composed mainly of fibroblasts, ubiquitous connective cells
forming a major part of most soft tissues. Since the exudate also con-
tained some fibroblasts, we decided to see if the unfamiliar types had
arisen by metamorphosis from them.
We set up a series of three-compartment culture dishes and placed a
standard colony of isolated, pure-bred mouse fibroblasts in each. In one
section we put a positive silver electrode, in one a negative electrode,
and in the third a piece of silver wire not connected to anything.
In cells right next to all three wires, the cytoplasm changed to an