You see things, and sa)' why? But I dream 1hings that never were, and I
say, 11'hy 110t? George Bernhard Shaw Far ahead of his time, June 1st,
1909, Alexander Maximov communicated in a lecture, given in the Charite
in Berlin, the fundamental knowledge, that there exists a lymphoid
hemopoetic stem cell. Alexander Friedenstein explained that during the
following years, Maximov also showed that the idea of interaction
between hemopoetic cells and their stroma to be one of the most
significant experiences. Monoclonal antibodies, recombinant DNA technics
and the improvement of tissue culture models are the major developments
to improve our possibilities to clarify growth and differentiation
functions of hemopoetic cells. During the last two decades it was shown
that soluble products, released from T cells, were not only involved in
inducing B cells to produce specific immunoglobulin secretion after
antigen stimulation. Furthermore, lymphokines together with other
cytokines regulate the growth and differentiation of hemopoetic cells.
As I have learned from Dick Gershon, our knowledge of the cellular basis
for immunoregulation has come a long way since 450 B.C. Thucydides
comments on the possible role of immune response in controlling the
Black Death. Dick Gershon speculated that no scientific interest for
these interesting observations was put forth at that time. Perhaps the
problems, the Athenians were having with the Spartans, converted money
from basis research into the military budget.