Cut-off scale of quantum gravity as a sign to unify interactions

Dynamics of gravity interaction with matter at one-loop level of effective quantum field theory naturally sets the cut-off scale ${\mathrm{\Lambda }}_E$ in a sub-Planckian region through incorporating the gauge coupling constant $\alpha ({\mathrm{\Lambda }}_E)$ and the reduced Planckian mass ${\tilde{m}}_{\text{pl}}$ into relation ${\mathrm{\Lambda }}_E\sim {\tilde{m}}_{\text{pl}}\alpha ({\mathrm{\Lambda }}_E)\mathrm{/}(4\pi )$ numerically yielding ${\mathrm{\Lambda }}_E\sim {10}^{16}$ GeV. Such two scales are empirically inherent for an inflationary cosmology.