New Uracil Dimers Showing Erythroid Differentiation Inducing Activities
摘要:
The synthesis of C5 linked uracil dimers was carried out according to a model developed in order to bind adenine in DNA. NI-Alkylated uracil derivatives were synthesized from isoorotic acid (uracil-5-carboxylic acid) or thymine. The carboxylic acid derivatives were condensed with diamines in order to produce dimeric compounds or with monoamines in order to obtain reference monomeric compounds. Some of the derivatives, in particular the uracil dimers, showed antiproliferative and erythroid differentiation induction properties towards human chronic myelogenous leukemia K562 cells, thus indicating that these compounds could represent a new class of drugs useful for the development of antitumor therapy based on the ability to induce terminal differentiation.
Exon skipping oligomer conjugates for muscular dystrophy
申请人:Sarepta Therapeutics, Inc.
公开号:US10758629B2
公开(公告)日:2020-09-01
Antisense oligomers complementary to a selected target site in the human dystrophin gene to induce exon 52 skipping are described.
本文描述了与人类肌营养不良症基因中选定的靶点互补的反义寡聚体,以诱导第 52 号外显子跳越。
Photoresponsive surfaces
申请人:University of South Australia
公开号:US20020084179A1
公开(公告)日:2002-07-04
The invention relates to an article having a photoresponsive surface, said article comprising a substrate having photoionisable moieties capable of undergoing dimerization attached to at least a portion of a surface thereof, the proximity of said moieties to one another being such that irradiation with light of an appropriate wavelength results in dimerization of at least a portion of said moieties thereby altering the wettability of the surface. Methods of preparing a substrate having a photoresistive surface and methods for altering the wettability of a surface of a substrate are also included.
The K562 cell line has been proposed as a useful experimental system to identify anti-tumor compounds acting by inducing terminal erythroid differentiation. K562 cells exhibit a low proportion of hemoglobin-synthesizing cells under standard cell growth conditions, but are able to undergo terminal erythroid differentiation when treated with a variety of anti-tumor compounds. In this paper we report a screening study on a set of different modified C(5) uracil derivatives for the evaluation of their antiproliferative effect in connection with erythroid differentiation pathways, and for defining a new class of drug candidates for the treatment of chronic myelogenous leukemia. Activity of the derivatives tested can be classified in two effect: an antiproliferative effect linked to a high level of erythroid differentiation activity and an antiproliferative effect without activation of gamma globin genes The highest antiproliferative effect and erythroid induction was shown by compound 9, a thymine derivative bearing a n-octyl chain on nitrogen N(1), whereas thymine did not show any effect, suggesting the importance of the linear alkyl chain in position N(1). To our knowledge this compound should be considered among the most efficient inducers of erythroid differentiation of K562 cells. This work is the starting point for the quest of more effective and specific drugs for the induction of terminal erythroid differentiation, for leading new insights in the treatment of neoplastic diseases with molecules acting by inducing differentiation rather than by simply exerting cytotoxic effects. (C) 2011 Elsevier B.V. All rights reserved.
US6800370B2
申请人:——
公开号:US6800370B2
公开(公告)日:2004-10-05
Synthesis of 5-substituted uracils and 2,4-dimethoxypyrimidines by wittig olefination
A variety of new 5-alkenyluracils has been prepared in high yields by Wittigolefination of 5-formyl-1-octy-luracil, 5-formyl-1,3-dioctyluracil and 5-formyl-2,4-dimethoxy pyrimidine with stabilized and semistabi-lized phosphorus ylides. The conformation of the products is discussed on the basis of 1H NMR spectral data.
高纯度的各种新的5-烯基尿嘧啶是通过将稳定化的5-甲酰基-1-辛基-尿嘧啶,5-甲酰基-1,3-二辛基尿嘧啶和5-甲酰基-2,4-二甲氧基嘧啶进行Wittig烯化反应而制得的。半稳定的磷化氢。基于1 H NMR光谱数据讨论产物的构象。