A model of the pathogenesis of insulin-dependent diabetes mellitus, i.
e. the initial phase of beta-cell destruction, is proposed: in a casca
de-like fashion efficient antigen presentation, unbalanced cytokine, s
ecretion and poor beta-cell defence result in beta-cell destruction by
toxic free radicals (O-2(-) and nitric oxide) produced by the beta ce
lls themselves. This entire process is under polygenetic control.