SLC2A1 and pemphigus foliaceus: Furthermore, the promotion of GLUT1 protein level by rosiglitazone and 15d-PGJ2 treatment as well as the down-regulation of GLUT1 protein expression by GW9662 treatment in peritoneal membranes of rat PF model were all verified by the immunohistochemistry (IHC) assay (Fig. 2D).