OGT and disseminated peritoneal leiomyomatosis: Here, we report that OGT and its activity, O-GlcNAcylation (assessed by using RL2 ]pan-O-GlcNAc] antibody), are also reduced in LPD islets (Figure 1, A–C), in addition to loss of mTORC1 signaling (Figure 1D).