Unpredictable Stereochemical Preferences for Mu Opioid Receptor Activity in an Exhaustively Stereodiversified Library of 1,4-Enediols
摘要:
[GRAPHICS]Using olefin cross-metathesis, we synthesized a novel stereodiversified library of compounds 3 containing a trans-1,4-enediol. Screening this library for mu opioid receptor (MOR) affinity identified multiple high-affinity ligands and revealed that the stereochemical configuration varied widely among those ligands having the highest affinity. It was not possible to predict the configurations of the most active compounds 3 on the basis of the configuration of endomorphin-2, a known MOR peptide ligand, validating the diversity-based approach to ligand discovery.
[EN] CROSS-LINKING COMPOUNDS AND METHODS OF USE THEREOF<br/>[FR] COMPOSÉS DE RÉTICULATION ET MÉTHODES D'UTILISATION DE CEUX-CI
申请人:UNIV NORTH CAROLINA STATE
公开号:WO2021092287A1
公开(公告)日:2021-05-14
Compounds of Formula IA, IB, II, III, IV, and/or V are described herein along with their methods of use. A compound of the present invention may cross-link under physiological conditions and/or in vivo.
Anthranilic acid-containing cyclic tetrapeptides: at the crossroads of conformational rigidity and synthetic accessibility
作者:Dongyue Xin、Kevin Burgess
DOI:10.1039/c6ob00693k
日期:——
contributes three atom units to main-chains, hence natural cyclic peptides can be 9, 12, 15, …. i.e. 3n membered-rings, where n is the number of amino acids. Cyclic peptides that are 9 or 12-membered ring compounds tend to be hard to prepare because of strain, while their one amino acid homologs (15-membered cyclic pentapeptides) are not conformationally homogeneous unless constrained by strategically placed
7‐epi‐Taxane has been achieved efficiently in gram scale from natural taxane via inversion of the 7‐hydroxyl group simply using Ag2O as catalyst and DMF as solvent. The catalyst could be quantitatively recovered by filtration without loss of catalytic activity. This condition is also applicable to the direct epimerization of taxane derivatives (e.g., docetaxel and paclitaxel) to 7‐epi‐taxane derivatives
Kidney-specific drug targeting is an attractive strategy to reduce unwanted side effects and to enhance drug efficacy within the renal tissue. For this purpose a novel kidney-specific drug carrier was developed. The peptide sequence (KKEEE)3K triggers exceptional renal specificity at high accumulation rates. Micro-PET imaging studies of megalin-deficient mice indicate that the cellular endocytosis of this carrier is mediated by megalin. This assumption is supported by immunohistochemical analysis of FITC-labeled carrier peptide, which exclusively accumulated at the apical side of proximal tubule cells within the renal cortex. Scintigraphic studies of modified ciprofloxacin conjugated to (KKEEE)3K confirmed the excellent drug targeting potential of the peptide carrier. The conjugate accumulated entirely in the kidneys, revealing flawless redirection of ciprofloxacin, a compound that is mainly excreted by the liver. In conclusion, these results suggest the potential of (KKEEE)3K as a promising candidate for kidney-targeted drug delivery to proximal tubule cells.
the AIE process in inflammatorycells that contain H2O2 and overexpress myeloperoxidase. The emission turn‐on resulting from the crosslinking of TT molecules could be used to distinguish between inflammatory and normal cells. Moreover, the massive TT aggregates induced mitochondria damage and cell apoptosis. This study demonstrates that the H2O2‐responsive peroxidase‐activated AIEgen holds great promise
炎性细胞已引起广泛关注,因为炎性疾病增加了许多类型癌症的风险。因此,实施炎性细胞的检测和治疗方法是紧迫而重要的。本文中,我们构建了一种具有聚集诱导发射(AIE)特性的治疗诊断探针,其中用两个酪氨酸(Tyr)部分修饰了四苯乙烯(TPE)。由于依赖H 2 O 2,酶催化的二氢酪氨酸的形成,含Tyr的TPE(TT)分子通过二氢酪氨酸键交联以诱导疏水性聚集体的形成,从而激活了包含H 2 O 2的炎性细胞中的AIE过程。并过表达髓过氧化物酶。TT分子交联产生的发射开启可用于区分炎症细胞和正常细胞。而且,大量的TT聚集体诱导线粒体损伤和细胞凋亡。这项研究表明,H 2 O 2反应过氧化物酶激活的AIEgen对于炎症细胞选择性成像和抑制具有广阔的前景。