A wide range of nano-drug delivery systems (NDDS), including lipid nanoparticles, nanoliposomes, polymeric micelles, nanosuspensions, and self-microemulsifying systems, have been developed to enhance the pharmacokinetic stability and therapeutic efficacy of bioactive natural compounds (151)
In the microenvironment of acute gout, where UA and H 2 O 2 levels are elevated, the nano-Pt in PDA@Pt not only catalyzes the degradation of UA through its uricase activity but also decomposes H 2 O 2 through its CAT activity, producing oxygen (O 2 ) and alleviating cellular hypoxia
Molecular pathways documented in preclinical research include: (1) activation of nitric oxide (NO) synthesis via L-arginine/eNOS pathway, (2) transcriptional upregulation of VEGF-A and FGF-2 favouring angiogenesis, (3) modulation of the Egr-1 early transcription factor involved in fibroblast proliferation, (4) interaction with 5-HT2A and dopaminergic receptors in some behavioural models, (5) stabilisation of endothelial function via eNOS modulation and reduction of oxidative stress (8-OH-dG, MDA)
Like avian intestinal calbindin-D 28K , mammalian intestinal calbindin-D 9K binds the absorbed calcium at the apical membrane and transports it across the cell to the basolateral membrane where it can be transported into the blood
