INS and type 1 diabetes mellitus: Furthermore, there were significant increases in the level of serum insulin post administration of insulin, adoptively transferred nBMCs and adoptively transferred dBMCs comparing to that in STZ-induced T1DM mice treated with sodium citrate buffer (0.41 ± 0.4 μU/ml, 0.46 ± 0.07 μU/ml and 0.22 ± 0.02 μU/ml, respectively versus 0.20 ± 0.01 μU/ml) (Fig. 2B).