The present invention relates to dipeptide enkephalin analogues of Formula (I) and their tautomers, ionic forms and pharmaceutically acceptable salts, and their use in medicine, in particular as opioid agonists.
作者:Michael J. Pepi、Shibin Chacko、Nicole Kopetz、Helena I.M. Boshoff、Gregory D. Cuny、Lizbeth Hedstrom
DOI:10.1016/j.bmcl.2022.129116
日期:2023.1
emergence of drug resistant Mycobacterium tuberculosis, the causative agent of tuberculosis, demands the development of new drugs and new drug targets. We have recently reported that the d-phenylalanine benzoxazole Q112 has potentantibacterial activity against this pathogen with a distinct mechanism of action from other antimycobacterial agents. Q112 and previously reported derivatives were unstable in
结核病的病原体——耐药结核分枝杆菌的出现,需要开发新药和新的药物靶点。我们最近报道, d-苯丙氨酸苯并恶唑Q112对这种病原体具有有效的抗菌活性,其作用机制与其他抗分枝杆菌药物不同。 Q112和之前报道的衍生物在血浆中不稳定,没有观察到游离化合物。在这里,我们扩展了抗分枝杆菌活性的结构-活性关系,并发现了血浆结合减少的不可水解衍生物。我们还表明,抗菌活性和对 PanG 的抑制之间不存在相关性,PanG 是这些化合物的假定靶点。
Antiangiogenic Effect of Dual/Selective α<sub>5</sub>β<sub>1</sub>/α<sub>v</sub>β<sub>3</sub> Integrin Antagonists Designed on Partially Modified Retro-Inverso Cyclotetrapeptide Mimetics
Recent evidence highlighted the role of alpha(5)beta(1) integrin in angiogenesis and In regulating alpha(v)beta(3) integrin function. As a consequence, selective alpha(5)beta(1) integrin inhibitors or dual alpha(5)beta(1)/alpha(v)beta(3) integrin inhibitors are considered promising candidates for the development of cancer therapeutic agents. In this paper, we describe the synthesis and pharmacological characterization of a minilibrary of cyclotetrapeptide mimetics containing a PMRI Arg-Gly-Asp sequence. In particular, c[(R)-beta Phe psi(NHCO)Asp psi-(NHCO)Gly-Arg] (3) displayed a good activity in inhibiting the alpha(v)beta(3) integrin-mediated cell adhesion of fibronectin or vitronectin, its well as the adhesion of fibronectin to the alpha(5)beta(1) integrin. Interestingly, the diastereomeric compound c[(S)- beta Phe psi(NHCO)Asp psi(NHCO)Gly-Arg] (2) maintained a good efficacy in inhibiting alpha(5)beta(1) integrin while gaining a certain selectivity over alpha(v)beta(3) integrin. These two integrin antagonists significantly inhibited bFGF-induced human endothelial cell tube formation at submicromolar concentrations. Conformational analysis and Molecular Docking calculations Suggest that the different alpha(5)beta(1) versus alpha(v)beta(3) selectivity of 2 and 3 can be rationalized on the basis of the alternative display of the aromatic side chain adjacent to Asp.