PLAUR and diabetic kidney disease: The functional relationship between αvβ3 and uPAR/suPAR can also be interfered by acid sphingomyelinase-like phosphodiesterase 3b (SMPDL-3b) in the setting of DKD, where αvβ3 integrin is not activated in the presence of high suPAR and increased SMPDL-3b, but the differential expression of these proteins rather causes podocyte motility and apoptosis [104].