PECAM1 and hyperinsulinemic hypoglycemia, familial, 4: IF indicated that the level of sinusoidal capillarization of LSECs in MafLSEC-KO mice was not further enhanced by CDAA diet feeding, as CD31 upregulation and CD32 loss were not significantly different between Chow-fed and CDAA-fed MafLSEC-KO mice, indicating that endothelial Maf deficiency per se caused a maximal effect (Fig. 4C).