通过泛素-蛋白酶体系统进行的靶向蛋白质降解已成为最有前途的药物发现方式之一。自噬是另一种细胞内降解系统,可以靶向多种非蛋白质底物以及蛋白质,但其在靶向降解中的应用仍处于起步阶段。我们之前的工作揭示了细胞内蛋白质上半胱氨酸残基的鸟嘌呤修饰与选择性自噬之间的关系,从而产生了第一个基于自噬的降解剂,即自噬靶向嵌合体(AUTAC)。基于研究背景,所有报道的AUTACs化合物都含有半胱氨酸作为子结构。在这里,我们通过进行 SAR 研究来检查该子结构的重要性,并报告通过用其他部分替换半胱氨酸来显着改善降解剂的活性。几种衍生物表现出亚μM范围的降解活性,证明了AUTAC增加的实用价值。
Concise access to N9-mono-, N2-mono- and N2,N9-di-substituted guanines via efficient Mitsunobu reactions
摘要:
Guanine poses several problems to the synthetic chemist owing to its polyfunctional nature and poor solubility. Over the past few decades, synthetic guanines have found applications as anti-cancer and anti-viral agents. Coupled with the ever-growing interest in designer PNAs and G-quartets, simple and efficient synthetic routes to novel guanines would be of significant benefit. We herein report that, upon simple protection and/or activation step(s), the guanine precursor 2-amino-6-chloropurine is rendered an excellent substrate for Mitsunobu chemistry, furnishing, after subsequent hydrolytic dechlorination and appropriate deprotection step(s), the desired N9-mono-, N2-mono- or N2,N9-di-substituted guanines in excellent yields (>= 80%). Importantly, we demonstrate that N9-functionalization proceeds with very good N9/N7 regioselectivity and with complete inversion of stereochemistry. (C) 2010 Elsevier Ltd. All rights reserved.
EXON SKIPPING OLIGOMER CONJUGATES FOR MUSCULAR DYSTROPY
申请人:Sarepta Therapeutics, Inc.
公开号:US20200190516A1
公开(公告)日:2020-06-18
Antisense oligomers complementary to a selected target site in the human dystrophin gene to induce exon 50 skipping are described. In various aspects, antisense oligomers are described according to Formula (I):
or a pharmaceutically acceptable salt thereof, wherein T, Nu, n, and R
100
are defined herein.
Alkylpurines as immunopotentiating agents. Synthesis and antiviral activity of certain alkylguanines
作者:Maged A. Michael、Howard B. Cottam、Donald F. Smee、Roland K. Robins、Ganesh D. Kini
DOI:10.1021/jm00074a025
日期:1993.10
Several simple 8-substituted 9-alkyl- and 7,8-disubstituted 9-alkylguanine derivatives were synthesized as potentialantiviral agents. These were tested for antiviral protection against a lethal Semliki Forest virus (SFV) infection in mice, and their antiviral properties were evaluated from a structure-activity standpoint. In this model system, 9-alkylguanines with the alkyl chain consisting of four
[EN] COMBINATION THERAPIES FOR TREATING MUSCULAR DYSTROPHY<br/>[FR] POLYTHÉRAPIES POUR TRAITER UNE DYSTROPHIE MUSCULAIRE
申请人:SAREPTA THERAPEUTICS INC
公开号:WO2019067979A1
公开(公告)日:2019-04-04
The present disclosure relates to methods of treating Duchenne's Muscular Dystrophy by administering an antisense oligonucleotide that induces exon skipping and a non-steroidal anti- inflammatory compound.