Synthesis of radioiodinated probes targeted toward matrix metalloproteinase-12
摘要:
Matrix metalloproteinase-12 (MMP-12, macrophage elastase) is a member of the MMP family that is responsible for the degradation of extracellular matrix, and is associated with the inflammatory process of chronic obstructive pulmonary disease (COPD). COPD, characterized by progressive and irreversible airflow obstruction, is recently a major cause of mortality and morbidity worldwide. Herein, to develop radioiodinated probes for the early diagnosis of COPD, we designed and synthesized novel MMP-12-targeted dibenzofuran compounds (1-3) with a variety of linker structures (carbamate, amide, and sulfonamide). In competitive enzyme activity assays, it was revealed that the linker structures significantly affected the inhibitory activity against and selectivity for MMP-12. Compound 1, with carbamate linker, demonstrated potent MMP-12 inhibitory activity (IC50 = 8.5 nM) compared to compound 2, with amide linker, and compound 3, with sulfonamide linker. Using bromo-substituted carbamate 13 as a radioiodination precursor, [I-125] 1 was successfully prepared to high radiochemical purity (over 98%) and good specific radioactivity (4.1 GBq/mu mol). These results suggest that radioiodinated compound 1 is potent as a novel MMP-12-targeted probe. (C) 2017 Elsevier Ltd. All rights reserved.
with tetralin or an oxygen-containing heterocyclic compound as a N alpha-substituent showed an inhibition with an I50 less than 10(-5) M. N-Monosubstituted derivatives of N alpha-dansyl-L-arginine amide were not hydrolyzed at all by thrombin and were hydrolyzed very slowly by trypsin, and N,N-disubstituted derivatives were not hydrolyzed at all by both enzymes.
制备了一系列具有取代或未取代的萘和杂环化合物作为Nα取代基的Nα-(芳基磺酰基)-L-精氨酸酰胺衍生物,并测试了它们作为凝血酶凝血活性的抑制剂。Nα-丹磺酰基-L-精氨酸酰胺的Nn-丁基和Nn-丁基-N-甲基衍生物对Nα-丹磺酰基-L-精氨酸酰胺的N-烷基和N,N-二烷基衍生物的抑制作用最大。它们的抑制作用与I50为2 X 10(-6)M的Nα-丹磺酰基-L-精氨酸-正丁酯的抑制作用一样。Nα-取代的4-甲基萘他磺酰基-L-精氨酸酰胺衍生物-和4-乙基哌啶也显示出有效的抑制作用,I50为10(-7)至10(-6)M。在该研究中,最有效的抑制作用是1- [Nα-(4,6-二甲氧基萘-2-磺酰基]-精氨酰基] -4-甲基哌啶,I50为7。
Sulfonamidomethyl phosphonate inhibitors of beta-lactamase
申请人:MethylGene, Inc.
公开号:US06472406B1
公开(公告)日:2002-10-29
The intention relates to bacterial antibiotic resistance and, in particular, to compositions and methods for overcoming bacterial antibiotic resistance. The invention provides novel &bgr;-lactamase inhibitors, which are structurally unrelated to the natural product and semi-synthetic &bgr;-lactamase inhibitors presently available, and which do not require a &bgr;-lactam pharmacophore. The invention also provides pharmaceutical compositions and methods for inhibiting bacterial growth.
The intention relates to bacterial antibiotic resistance and, in particular, to compositions and methods for overcoming bacterial antibiotic resistance. The invention provides novel &bgr;-lactamase inhibitors, which are structurally unrelated to the natural product and semi-synthetic &bgr;-lactamase inhibitors presently available, and which do not require a &bgr;-lactam pharmacophore. The invention also provides pharmaceutical compositions and methods for inhibiting bacterial growth.
The invention relates to bacterial antibiotic resistance and, in particular, to compositions and methods for overcoming bacterial antibiotic resistance. The invention provides novel &bgr;-lactamase inhibitors, which are structurally unrelated to the natural product and semi-synthetic &bgr;-lactamase inhibitors presently available, and which do not require a &bgr;-lactam pharmacophore. The invention also provides pharmaceutical compositions and methods for inhibiting bacterial growth.
Synthesis and Biological Activity of Various Derivatives of a Novel Class of Potent, Selective, and Orally Active Prostaglandin D<sub>2</sub> Receptor Antagonists. 1. Bicyclo[2.2.1]heptane Derivatives
Novel prostaglandin D(2) (PGD(2)) receptor antagonists were synthesized as a potential new class of antiallergic agents having a bicyclo[2.2.1]heptane ring system with sulfonamide groups. Some of them exhibit extremely potent antagonism of the PGD(2) receptor in radioligand binding and cAMP formation assays with IC(50) values below 50 nM and much less antagonism of TXA(2) and PGI(2) receptors. These