NGF and diabetes mellitus: While STZ at a diabetogenic dose reduces the number ofLangerhans islets, reduces the absolute and relative numbers of β-cells,changes their shape, and induces the emergence of dystrophic elements,administration of the original dimeric dipeptide NGF mimetic, compound GK-2, toanimals with developed diabetes (glycemia above 20 mmol/L) significantlyreduces the severity of these morphological changes.