  QCD vacuum instantons induce very strong interactions between light quarks,
which generate large dynamical light quark mass M for initially almost massless
quarks and can bound these quarks to produce almost massless pions in
accordance with the spontaneous breaking of chiral symmetry (S\chiSB). On the
other hand, the QCD vacuum instantons generate heavy-light quark interactions
terms, which are responsible for the effects of S\chiSB in a heavy-light quark
system. Summing the re-scattering series that lead to the total light quark
propagator and making few further steps, we get the fermionized representation
of low-frequencies light quark determinant in the presence of the quark
sources, which is relevant for our problems. The next important step in the
line of this strategy is to derive the equation and calculate the heavy quark
propagator in the instanton media and in the presence of light quarks. This one
provide finally the heavy and N_f light quarks interaction term. As an example,
we derive heavy quark-light mesons interaction term for the N_f=2 case. If we
take the average instanton size \rho=0.35 fm, and average inter-instanton
distance R=0.856 fm from our previous estimates, we obtain at LO on 1/N_c
expansion dynamical light quark mass M = 570 MeV and instanton media
contribution to heavy quark mass \Delta M=148 MeV. These factors define the
coupling between heavy and light quarks and, certainly, between heavy quarks
and light mesons. We will apply this approach to heavy quark and heavy-light
quark systems.
