BAMBI and diabetes mellitus: Some of this circRNAs have been confirmed by systematic research; for example, Zhu et al. [31] found that downregulation of circDMNT3B was conducive to the vascular dysfunction of DR on basis of targeting miR-20b-5p and BAMBI (a type 1 TGFβ receptor antagonist), and Shan et al. [32] found that circZNF532 adjusts diabetes-induced retinal pericyte deterioration as well as vascular dysfunction.