Dimeric argininamide-type neuropeptide Y receptor antagonists: Chiral discrimination between Y1 and Y4 receptors
摘要:
The structurally related peptides neuropeptide Y (NPY), peptide YY (PYY) and pancreatic polypeptide (PP) are endogenous agonists of the NPY receptor (YR) family, which in humans comprises four functionally expressed subtypes, designated Y1R, Y2R, Y4R and Y5R. Nonpeptide antagonists with high affinity and selectivity have been described for the Y1R, Y2R and Y5R, but such compounds are still lacking for the Y4R. In this work, the structures of the high affinity selective (R)-argininamide-type Y1R antagonists BIBP3226 and BIBO3304 were linked via the guanidine or urea moieties to give homo-dimeric argininamides with linker lengths ranging from 31 to 41 atoms. Interestingly, the twin compounds proved to be by far less selective for the Y1R than the R-configured monovalent parent compounds. The decrease in selectivity ratio was most pronounced for Y1R versus Y4R subtype, resulting in comparable affinities of bivalent ligands for Y1R and Y4R (e.g. UR-MK177 ((R, R)-49): K-i = 230 nM (Y1R) and 290 nM (Y4R)). With a Ki value of 130 nM and a K-b value of 20 nM, UR-MK188 ((R,R)-51) was superior to all Y4R antagonists known to date. The S, S-configured optical antipodes of UR-MK177 and UR-MK188 (UR-MEK381 ((S, S)-49) and UR-MEK388 ((S,S)-51)) were synthesized to investigate the stereochemical discrimination by the different receptor subtypes. Whereas preference for R, R-configured argininamides was characteristic of the Y1R, stereochemical discrimination by the Y4R was not observed. This may pave the way to selective Y4R antagonists. (C) 2013 Elsevier Ltd. All rights reserved.
Dimeric argininamide-type neuropeptide Y receptor antagonists: Chiral discrimination between Y1 and Y4 receptors
摘要:
The structurally related peptides neuropeptide Y (NPY), peptide YY (PYY) and pancreatic polypeptide (PP) are endogenous agonists of the NPY receptor (YR) family, which in humans comprises four functionally expressed subtypes, designated Y1R, Y2R, Y4R and Y5R. Nonpeptide antagonists with high affinity and selectivity have been described for the Y1R, Y2R and Y5R, but such compounds are still lacking for the Y4R. In this work, the structures of the high affinity selective (R)-argininamide-type Y1R antagonists BIBP3226 and BIBO3304 were linked via the guanidine or urea moieties to give homo-dimeric argininamides with linker lengths ranging from 31 to 41 atoms. Interestingly, the twin compounds proved to be by far less selective for the Y1R than the R-configured monovalent parent compounds. The decrease in selectivity ratio was most pronounced for Y1R versus Y4R subtype, resulting in comparable affinities of bivalent ligands for Y1R and Y4R (e.g. UR-MK177 ((R, R)-49): K-i = 230 nM (Y1R) and 290 nM (Y4R)). With a Ki value of 130 nM and a K-b value of 20 nM, UR-MK188 ((R,R)-51) was superior to all Y4R antagonists known to date. The S, S-configured optical antipodes of UR-MK177 and UR-MK188 (UR-MEK381 ((S, S)-49) and UR-MEK388 ((S,S)-51)) were synthesized to investigate the stereochemical discrimination by the different receptor subtypes. Whereas preference for R, R-configured argininamides was characteristic of the Y1R, stereochemical discrimination by the Y4R was not observed. This may pave the way to selective Y4R antagonists. (C) 2013 Elsevier Ltd. All rights reserved.
The present invention provides aminoside tetracyclic anthraquinones represented by formula (I) or formula (II), wherein the peptides are introduced to connect tetracyclic anthraquinones and fatty acid saturated or unsaturated in order to make the anticancer agents to be absorbed and released selectively; meanwhile some water-solubility groups are also introduced into the branched chain, aminosaccharide and tetracyclic moiety of the compounds to improve the water-solubility. The present invention also provides the preparative method and the use thereof as pharmaceutically active components for treating the diseases cured by aminoside tetracyclic anthraquinone, for example cancer, such as intestines, liver, gastric, breast, lung, ovary, prostate, brain glioma, lymph, skin, pigment, thyroid gland, multiple bone marrow cancer and leukemia.
Peptide nanotube aligning side chains onto one side
作者:Yuki Tabata、Shota Mitani、Shunsaku Kimura
DOI:10.1002/psc.2881
日期:2016.6
ic acid (CP5ES) is synthesized and investigated on peptide nanotube (PNT) formation. When the PNT is formed with the maximum number of intermolecular hydrogen bonds between the cyclic peptides, the sequence enables the alignment of the side chains, naphthyl groups, on one side of the PNT. Microscopic and spectroscopic observations of CP5ES crystals reveal that CP5ES forms rod‐ or needle‐shaped molecular
Synthesis and Preclinical Evaluation of [<sup>18</sup>F]SiFA-PSMA Inhibitors in a Prostate Cancer Model
作者:Justin J. Bailey、Melinda Wuest、Michael Wagner、Atul Bhardwaj、Carmen Wängler、Bjoern Wängler、John F. Valliant、Ralf Schirrmacher、Frank Wuest
DOI:10.1021/acs.jmedchem.1c00812
日期:2021.11.11
tomography (PET) imaging of prostate-specific membrane antigen (PSMA) with gallium-68 (68Ga) and fluorine-18 (18F) radiotracers has aroused tremendous interest over the past few years. The use of organosilicon-[18F]fluoride acceptors (SiFA) conjugated to urea-based peptidomimetic PSMA inhibitors provides a “kit-like” multidose synthesis technology. Nine novel 18F-labeled SiFA-bearing PSMA inhibitors with different
[EN] FIBROBLAST ACTIVATION PROTEIN (FAP)-TARGETED IMAGING AND THERAPY OF CANCERS AND OTHER FIBROTIC AND INFLAMMATORY DISEASES<br/>[FR] IMAGERIE CIBLÉE DE PROTÉINE D'ACTIVATION DES FIBROBLASTES (FAP) ET THÉRAPIE DE CANCERS ET D'AUTRES MALADIES FIBROTIQUES ET INFLAMMATOIRES
申请人:PURDUE RESEARCH FOUNDATION
公开号:WO2021055641A1
公开(公告)日:2021-03-25
Fibroblast activation protein (FAP)-targeting compounds (e.g., conjugates); a method for imaging cancer or fibrosis; and methods for treating an inflammatory disease/disorder and cancer.
THE TETRACYCLIC ANTHRAQUINONES POSSESSING ANTI-CANCER EFFECT
申请人:Tianjin Hemey Bio-Tech Co., Ltd.
公开号:EP2123283A1
公开(公告)日:2009-11-25
The present invention provides aminoside tetracyclic anthraquinones represented by formula (I) or formula (II), wherein the piptides are introduced to connect tetracyclic anthraquinones and fatty acid saturated or unsaturated in order to make the anticancer agents to be absorbed and released selectively; meanwhile some water-solubility groups are also introduced into the branched chain, aminosaccharide and tetracyclic moiety of the compounds to improve the water-solubility. The present invention also provides the preparative method and the use thereof as pharmaceutically active components for treating the diseases cured by aminoside tetracyclic anthraquinone, for example cancer, such as intestines, liver, gastric, breast, lung, ovary, prostate, brain glioma, lymph, skin, pigment, thyroid gland, multiple bone marrow cancer and leukemia.