| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | (3aS,4S,6aR)-4-(4-isocyanatobutyl)tetrahydro-1H-thieno[3,4-d]imidazol-2(3H)-one | —— | C10H15N3O2S | 241.314 |
| D-生物素 | biotin | 58-85-5 | C10H16N2O3S | 244.315 |
| —— | biotinyl azide | 902172-66-1 | C10H15N5O2S | 269.327 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | norbiotinamine | 173401-47-3 | C9H17N3OS | 215.319 |
Atherosclerosis is a chronic progressive disease involving inflammatory events, such as the overexpression of adhesion molecules including the endothelial Vascular Cell Adhesion Molecule-1 (VCAM-1). VCAM-1 is rapidly overexpressed in the first stages of atherosclerosis, thus representing a promising target for early atheroma detection. Two novel Positron Emission Tomography (PET) radiopharmaceuticals (MacroP and NAMP), based on the VCAM-1-binding peptide having sequence VHPKQHRGGSKGC, were synthesized and characterized. MacroP is derived from the direct conjugation of a DOTA derivative with the peptide, while NAMP is a biotin derivative conceived to be employed in a three-step pretargeting system, involving the use of a double-chelating derivative of DOTA. The identity of the newly synthesized radiopharmaceuticals was confirmed by mass spectrometry and, after radiolabeling with 68Ga, both showed high radiochemical purity; in vitro tests on human umbilical vein endothelial cells evidenced their VCAM-1 binding ability, with higher radioactive uptake in the case of NAMP. Moreover, NAMP might also be employed in a theranostic approach in association with functionalized biotinylated nanoparticles.
Chloromethyl triazoles are shown to be cysteine selective alkylation reagents for ‘near-native’ post-translational modification of protein and peptide substrates.