肌强直性营养不良是成年发作性肌营养不良的最常见形式,起源于DMPK基因的CTG重复扩增。扩展的CUG转录物螯合了MBNL1,MBNL1是替代剪接的关键调控因子,导致许多pre-mRNA的调控异常。我们报道了一种靶向RNA的药物可能是治疗1型强直性肌营养不良症(DM1)的潜在先导化合物,揭示了这种小分子方法的前景和挑战。该药物是MBNL1-rCUG复合物的有效抑制剂,抑制常数(K i)为25±8 n m,并且对HeLa细胞无毒,能够溶解核灶,并纠正DM1模型细胞中的胰岛素受体剪接缺陷。此外,用该化合物治疗可改善果蝇DM1模型中的两种独立的疾病表型:成年外眼退化和幼虫爬行缺陷。但是,该化合物在小鼠中的最大耐受剂量相对较低,并且其细胞摄取可能受到限制,从而为未来的发展方向提供了见识。
Developing Bivalent Ligands to Target CUG Triplet Repeats, the Causative Agent of Myotonic Dystrophy Type 1
作者:Amin Haghighat Jahromi、Yuan Fu、Kali A. Miller、Lien Nguyen、Long M. Luu、Anne M. Baranger、Steven C. Zimmerman
DOI:10.1021/jm400794z
日期:2013.12.12
expanded CUG repeat transcript (CUGexp) is the causative agent of myotonicdystrophytype1 (DM1) by sequestering muscleblind-like 1 protein (MBNL1), a regulator of alternativesplicing. On the basis of a ligand (1) that was previously reported to be active in an in vitro assay, we present the synthesis of a small library containing 10 dimeric ligands (4–13) that differ in length, composition, and attachment
Development of novel macrocyclic small molecules that target CTG trinucleotide repeats
作者:Julio F. Serrano、JuYeon Lee、L. Daniel Curet、Lauren D. Hagler、Sarah E. Bonson、Emma J. Schuster、Steven C. Zimmerman
DOI:10.1016/j.bmc.2019.05.022
日期:2019.7
molecular design, synthesis, and investigation of a series of acridine-triaminotriazine macrocycles that selectively bind to CTG trinucleotide repeats in DNA with minimal nonspecific binding. The limited conformational flexibility enforces the stacking of the triaminotriazine and acridine units. Isothermal titration calorimetry studies and Job plot analyses revealed that the ligands bound to d(CTG) mismatched
THERAPEUTIC METHODS AND AGENTS FOR TREATING MYOTONIC DYSTROPHY
申请人:THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
公开号:US20130261124A1
公开(公告)日:2013-10-03
The invention provides compounds, compositions and methods for treating myotonic dystrophy. The compounds can selectively bind to CUG repeats in RNA, or to CTG repeats in DNA, and inhibit replication of the nucleic acids.
Targeting Toxic RNAs that Cause Myotonic Dystrophy Type 1 (DM1) with a Bisamidinium Inhibitor
作者:Chun-Ho Wong、Lien Nguyen、Jessie Peh、Long M. Luu、Jeannette S. Sanchez、Stacie L. Richardson、Tiziano Tuccinardi、Ho Tsoi、Wood Yee Chan、H. Y. Edwin Chan、Anne M. Baranger、Paul J. Hergenrother、Steven C. Zimmerman
DOI:10.1021/ja5012146
日期:2014.4.30
micromolar affinity (Kd = 8 ± 2 μM) and disrupts the MBNL1-r(CUG)12 interaction in vitro (Ki = 8 ± 2 μM). In addition, ligand 3 is cell and nucleus permeable, exhibits negligible toxicity to mammalian cells, dissolves MBNL1-r(CUG)exp ribonuclear foci, and restores misregulated splicing of IR and cTNT in a DM1 cell culture model. Importantly, suppression of r(CUG)exp RNA-induced toxicity in a DM1 Drosophila model
[EN] BISAMIDINIUM-BASED INHIBITORS FOR THE TREATMENT OF MYOTONIC DYSTROPHY<br/>[FR] INHIBITEURS À BASE DE BISAMIDINIUM POUR LE TRAITEMENT DE LA DYSTROPHIE MYOTONIQUE
申请人:UNIV ILLINOIS
公开号:WO2016023039A1
公开(公告)日:2016-02-11
The invention provides compounds, compositions and therapeutic methods. The compounds and compositions can be used for the treatment of myotonic dystrophy. The compounds can selectively bind to CUG repeats in RNA, or to CTG repeats in DNA, and inhibit replication of the nucleic acids. RNA-targeted therapeutic agents for the treatment of myotonic dystrophy type 1 (DM1) are described. In one embodiment, two bisamidinium ligands are linked using "click" chemistry to form a heterodimer that is a potent inhibitor of the MBNL1 -rCUGexp complex (KI = 25 ± 8 nM), is relatively non-toxic to HeLa cells, dissolves nuclear foci, corrects >80% of the IR misregulated alternative splicing in DM1 model cells (1 μΜ), and shows improvement of disease phenotypes in a DM1 Drosophila model.