BG	Blood glucose
BW	Body weight
DM	Diabetes mellitus
DMSO	Dimethyl sulfoxide
DR	Diabetic retinopathy
DR-MSC	Diabetic retinopathy group with subconjunctival mesenchymal stem cell injection
DR-MSC-S	Diabetic retinopathy group with subconjunctival sirolimus-pretreated mesenchymal stem cell injection
ERG	Electroretinogram
H&E	Hematoxylin and eosin
hUCB-MSCs	Human umbilical cord blood-derived mesenchymal stem cells
INL	Inner nuclear layer
INT	Intact control group
IPL	Inner plexiform layer
MSCs	Mesenchymal stem cells
NFL	Nerve fiber layer
ONL	Outer nuclear layer
OPL	Outer plexiform layer
PBS	Phosphate-buffered saline
PRL	Photoreceptor layer
RGC	Retinal ganglion cell layer
ROS	Reactive oxygen species
STZ	Streptozotocin
VEGF	Vascular endothelial growth factor