Highly Potent and Selective Fluorescent Antagonists of the Human Adenosine A3 Receptor Based on the 1,2,4-Triazolo[4,3-a]quinoxalin-1-one Scaffold
摘要:
The adenosine-A(3) receptor (A(3)AR) is a G protein-coupled receptor that shows promise as a therapeutic target for cancer, glaucoma, and various autoimmune inflammatory disorders, and as such, there is a need for molecular probes to study this receptor. Here, we report a series of fluorescent ligands containing different linkers and fluorophores based around a 1,2,4-triazolo[4,3-a]quinoxalin-1-one antagonist. One of these conjugates (19) displayed high affinity for the A(3)AR (pK(D) = 9.36 +/- 0.12) and is >650-fold selective over other adenosine receptor subtypes. Confocal microscopy revealed clear, displaceable membrane labeling of CHO-A(3) cells with 19, with no detectable labeling of CHO-A(1) cells under identical conditions. This fluorescent ligand was also able to specifically label the A(3)AR in HEK293T cells containing a mixed adenosine receptor population. The subtype specificity, along with its excellent imaging properties, make 19 an ideal tool for studying A(3)AR distribution and organization, particularly in the presence of other adenosine receptor subtypes.
[EN] COMPOUNDS THAT INDUCE DEGRADATION OF ANTI-APOPTOTIC BCL-2 FAMILY PROTEINS AND THE USES THEREOF<br/>[FR] COMPOSÉS INDUISANT LA DÉGRADATION DE PROTÉINES ANTI-APOPTOTIQUES DE LA FAMILLE BCL-2 ET UTILISATION DE CES DERNIERS
申请人:BIOVENTURES LLC
公开号:WO2017184995A1
公开(公告)日:2017-10-26
The present disclosure provides compositions and methods for selectively killing senescent cells, wherein the composition comprises a compound of Formula (I) or a compound of Formula (II). The selective killing of senescent cells may delay aging and/or treat age-related disorders.
[EN] ECSTASY HAPTENS AND IMMUNOGENS<br/>[FR] HAPTENES ET MMUNOGENES CONTRE L'ECSTASY
申请人:DADE BEHRING INC
公开号:WO2005061482A1
公开(公告)日:2005-07-07
Methods, compositions and kits are disclosed. Enzyme conjugates of Formula (I) are employed in assays for the determination of an methylenedioxyamphetamine, a methylene-dioxyethamphetamine, and/or a methylenedioxymethamphetamine. Immunogenic conjugates of Formula I are employed to prepare antibodies for an methylenedioxyamphetamine, a methylenedioxyethamphetamine, and/or for a methylene- dioxymethamphetamine for use in assays for the determination of an methylenedioxyamphetamine, a methyl enedioxyethamphetamine, and/or a methylene-dioxymethamphetamine. The enzyme conjugates may also be employed to screen antibodies for use in such methods.
Chromenopyrazole-based High Affinity, Selective Fluorescent Ligands for Cannabinoid Type 2 Receptor
作者:Sameek Singh、Caitlin R. M. Oyagawa、Christa Macdonald、Natasha L. Grimsey、Michelle Glass、Andrea J. Vernall
DOI:10.1021/acsmedchemlett.8b00597
日期:2019.2.14
Cannabinoid type 2 receptor (CB2R) is an attractive target for the treatment of pain and inflammatory disorders. Availability of a selective CB2R fluorescentligand to study CB2R expression and localization in healthy and disease conditions would greatly contribute to improving our understanding of this receptor. Herein, we report a series of chromenopyrazole-based CB2R fluorescentligands. The highest affinity
大麻素2型受体(CB2R)是治疗疼痛和炎性疾病的诱人靶标。在健康和疾病条件下研究CB2R表达和定位的选择性CB2R荧光配体的可用性将大大有助于增进我们对该受体的了解。在本文中,我们报告了一系列基于色诺吡唑的CB2R荧光配体。最高亲和力的荧光配体是含Cy5的24(hCB2R pK i = 7.38±0.05),其选择性是CB1R的131倍。在cAMP BRET分析中,有24个是有效的CB2R反向激动剂。宽视场成像实验表明,在活细胞中24个与CB2R的结合具有良好的选择性和低水平的非特异性荧光。高亲和力,选择性,
Synthesis and effect of linker length on guest-binding affinity of water-soluble tetraazacyclophane dimers
作者:Osamu Hayashida、Koji Matsushita、Shuhei Kusano
DOI:10.1007/s10847-016-0602-7
日期:2016.4
Cationic cyclophane dimers which are constructed with two tetraaza[6.1.6.1]para-cyclophanes and a short or long hydrophilic linker interposed between them were synthesized as a water-soluble host (1a and 1b, respectively). The binding constant (K) values of 1a having a short linkage with fluorescence guests such as 6-p-toluidinonaphthalene-2-sulfonate and 6-anilinonaphthalene-2-sulfonate were about 2-fold larger than those of 1b having a long one with the identical guests. Local concentration in the macrocycles of 1a was more effective than that of 1b for such enhancements of the guest-binding affinity. Moreover, the K values of cationic cyclophane dimer having a short hydrophobic linkage 1c were comparable to those by 1a, indicating that guest-binding affinity was less affected on the hydrophilic/hydrophobic characteristics of these short linkers.
The present invention is related to insulin derivatives having a side chain attached either to the α-amino group of the N-terminal amino acid residue of B chain or to an ε-amino group of a Lys residue present in the B chain of the parent insulin molecule via an amide bond which side chain comprises one or more residues of ethyleneglycol, propyleneglycol and/or butyleneglycol containing independently at each termini a group selected from —NH
2
and —COOH; a fatty diacid moiety with 4 to 22 carbon atoms, at least one free carboxylic acid group or a group which is negatively charged at neutral pH; and possible linkers which link the individual components in the side chain together via amide or ether bonds, said linkers optionally comprising a free carboxylic acid group.