Fig. 1From: Surface-anchored microbial enzyme-responsive solid lipid nanoparticles enabling colonic budesonide release for ulcerative colitis treatmentSolid lipid nanoparticle (SLN) synthesis procedure and GI flora-triggered drug topical release system. (A) Synthetic route of NaCS-C12. (B) The procedure of LBL self-assembly on the SLN template forming polyelectrolyte complex (PEC) layers. (C) The release mechanism of BUD from different generations of SLNs in different GI tractsBack to article page