VDR and diabetes mellitus: Previously, we showed the same effect of reducing VDR after the VD3 administration against the background of prednisolone load in various tissues and organs, including bone marrow (Shymanskyi et al., 2018) and liver (Lisakovska et al., 2017), as well as kidneys (Mazanova et al., 2022) and liver (Mazanova et al., 2018) in diabetes-associated VD3 deficiency.