glucuronidation

Uridine-5'-diphosphate disodium salt (UDP disodium salt) is a specific agonist of the P2Y6 receptors (EC50 = 13 nM for human P2Y6), stimulating the production of inflammatory mediators, phagocytosis, and vasoconstriction. Uridine-5'-diphosphate disodium salt also acts as an antagonist of P2Y14.

Tacrolimus (Fujimycin) can bind FKBP12 to form a high-affinity complex (Ki: 0.2 nM) which inhibits the activity of the calcium calmodulin-dependent protein phosphatase.

Pyrimidine (Metadiazine)s are heterocyclic, six-membered, nitrogen-containing carbon ring structures, with uracil, cytosine and thymine being the basal structures of ribose-containing nucleosides (uridine, cytidine, and thymidine respectively), or deoxyribose-containing deoxynucleosides, and their corresponding ribonucleotides or deoxyribonucleotides. Pyrimidines serve essential functions in human metabolism as ribonucleotide bases in RNA (uracil and cytosine), and as deoxyribonucleotide bases in DNA (cytosine and thymine), and are linked by phosphodiester bridges to purine nucleotides in double-stranded DNA, in both the nucleus and the mitochondria. Pyrimidine activated sugars are also involved in polysaccharide and phospholipid synthesis, glucuronidation in detoxification processes, glycosylation of proteins and lipids and in the recently identified novel endothelium-derived vasoactive dinucleotides.

Epmedin C (Baohuoside-VI) was metabolized via desugarization, dehydrogenation, hydrogenation, dehydroxylation, hydroxylation, demethylation and glucuronidation pathways in vivo. It has potential activity against osteoporosis by stimulating osteoblasts.

1. Biotransformation of glucoAurantio-obtusin towards Aurantio-obtusin increased the toxicity of irinotecan through increased inhibition of SN-38 glucuronidation. 2. Aurantio-obtusin, stimulated chemotactic migration of MC3T3-E1 osteoblast cells in a conc