生物活性
Nastorazepide(Z-360)是一种选择性口服有效、1,5-苯并二氮杂环衍生物胃泌素/胆囊收缩素2(CCK-2)受体拮抗剂,具有潜在的抗肿瘤活性。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (R)-N-(5-cyclohexyl-1-(3,3-dimethyl-2-oxobutyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-yl)-2,2,2-trifluoroacetamide | 1246926-32-8 | C23H30F3N3O3 | 453.505 |
—— | (R)-1-tert-butylcarbonylmethyl-2-oxo-3-tert-butoxycarbonylamino-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine | 209223-73-4 | C26H39N3O4 | 457.613 |
—— | (R)-(-)-1-tert-butylcarbonylmethyl-2-oxo-3-phenoxycarbonylamino-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine | 343326-73-8 | C28H35N3O4 | 477.604 |
—— | (R)-(-)-2-oxo-3-tert-butoxycarbonylamino-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine | 252209-91-9 | C20H29N3O3 | 359.469 |
—— | (R)-N-(1-cyclohexyl-4-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-yl)-4-methylbenzenesulfonamide | 1246926-43-1 | C22H27N3O3S | 413.541 |
—— | (R)-3-(cyclohexyl-(2-(3,3-dimethyl-2-oxobutylamino)phenyl)amino)-2-(2,2,2-trifluoroacetamido)propionic acid | 1246926-34-0 | C23H32F3N3O4 | 471.52 |
—— | (R)-benzyl 3-((2-(tert-butoxycarbonylamino)phenyl)(cyclohexyl)amino)-2-(2,2,2-trifluoroacetamide) propionate | 1246926-36-2 | C29H36F3N3O5 | 563.617 |
—— | (R)-methyl 3-((2-(tert-butoxycarbonylamino)phenyl)(cyclohexyl)amino)-2-(2,2,2-trifluoroacetamido)propionate | 1246926-39-5 | C23H32F3N3O5 | 487.519 |
—— | (R)-benzyl 3-((2-aminophenyl)(cyclohexyl)amino)-2-(2,2,2-trifluoroacetamido)propionate | 1246926-37-3 | C24H28F3N3O3 | 463.5 |
—— | (R)-methyl 3-((2-(tert-butoxycarbonylamino)phenyl)(cyclohexyl)amino)-2-(4-methylphenylsulfonamido)propionate | 1246926-41-9 | C28H39N3O6S | 545.7 |
The cholecystokinin-2 receptor (CCK-2R) is overexpressed in several human cancers but displays limited expression in normal tissues. For this reason, it is a suitable target for developing specific radiotracers. In this study, a nastorazepide-based ligand functionalized with a 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) chelator (IP-001) was synthesized and labelled with indium-111. The radiolabeling process yielded >95% with a molar activity of 10 MBq/nmol and a radiochemical purity of >98%. Stability studies have shown a remarkable resistance to degradation (>93%) within 120 h of incubation in human blood. The in vitro uptake of [111In]In-IP-001 was assessed for up to 24 h on a high CCK-2R-expressing tumor cell line (A549) showing maximal accumulation after 4 h of incubation. Biodistribution and single photon emission tomography (SPECT)/CT imaging were evaluated on BALB/c nude mice bearing A549 xenograft tumors. Implanted tumors could be clearly visualized after only 4 h post injection (2.36 ± 0.26% ID/cc), although a high amount of radiotracer was also found in the liver, kidneys, and spleen (8.25 ± 2.21%, 6.99 ± 0.97%, and 3.88 ± 0.36% ID/cc, respectively). Clearance was slow by both hepatobiliary and renal excretion. Tumor retention persisted for up to 24 h, with the tumor to organs ratio increasing over-time and ending with a tumor uptake (1.52 ± 0.71% ID/cc) comparable to liver and kidneys.