Structure−Immunosuppressive Activity Relationships of New Analogues of 15-Deoxyspergualin. 1. Structural Modifications of the Hydroxyglycine Moiety
摘要:
A series of new analogues of 15-deoxyspergualin (DSG), an immunosuppressive agent currently commercialized in Japan, was synthesized and tested in a graft-versus-host disease (GVHD) model in mice. Using the general concept of bioisosteric replacement, variations of the hydroxyglycine central "C" region were made in order to determine its optimum structure in terms of in vivo immunosuppressive activity. By this way, the malonic derivative 13a was discovered as the first example of a new series of potent immunosuppressive agents encompassing a retro-amide bond linked to the hexyl-guanidino moiety. Structure-activity relationships of this series were studied by synthesizing compounds 13g-i and 13k-s. Variation of the "right-amide" of 13a led to the urea 19a and the carbamates 23 and 27a which proved to be equally active as DSG in our GVHD model. Finally 27a was found to be the most potent derivative, being slightly more active than DSG in a heart allotransplantation model in rats. Due to the absence of chiral center in its structure and to its improved chemical stability compared to DSG, 27a was selected as a candidate for clinical evaluation.
DUPLEX OLIGONUCLEOTIDE COMPLEXES AND METHODS FOR GENE SILENCING BY RNA INTERFERENCE
申请人:Yamada Christina
公开号:US20080085869A1
公开(公告)日:2008-04-10
Provided herein are duplex oligonucleotide complexes which can be administered to a cell, tissue or organism to silence a target gene without the aid of a transfection reagent(s). The duplex oligonucleotide complexes of the disclosure include a conjugate moiety that facilitates delivery to a cell, tissue or organism.
COMPOUND OR SALT THEREOF, NATURAL KILLER T CELL ACTIVATOR, AND PHARMACEUTICAL COMPOSITION
申请人:KEIO UNIVERSITY
公开号:US20200207798A1
公开(公告)日:2020-07-02
The invention provides a compound or a salt thereof capable of activating natural killer T cell, a natural killer T cell activating agent containing such a compound or a salt thereof, and a pharmaceutical composition. The compound of the invention is a compound represented by the following formula (1) or a salt thereof. It is preferable that total carbon number of the number of carbon atoms in the monovalent hydrocarbon group in R
1
in the formula (1) excluding a substitutent and the number of carbon atoms in the divalent hydrocarbon group in X
1
is 5 to 50. The natural killer T cell activating agent contains the aforementioned compound or a salt thereof. The pharmaceutical composition contains the aforementioned compound or a pharmacologically acceptable salt thereof.
TRIPARTITE OLIGONUCLEOTIDE COMPLEXES AND METHODS FOR GENE SILENCING BY RNA INTERFERENCE
申请人:Yamada Christina
公开号:US20100093085A1
公开(公告)日:2010-04-15
Provided herein are tripartite oligonucleotide complexes which can be administered to a cell, tissue or organism to silence a target gene. The tripartite oligonucleotide complexes of the disclosure may include a conjugate moiety that facilitates delivery to a cell, tissue or organism without the aid of a transfection reagent
Duplex Oligonucleotide Complexes and Methods for Gene Silencing by RNA Interference
申请人:Yamada Christina
公开号:US20120322855A1
公开(公告)日:2012-12-20
Provided herein are duplex oligonucleotide complexes which can be administered to a cell, tissue or organism to silence a target gene without the aid of a transfection reagent(s). The duplex oligonucleotide complexes of the disclosure include a conjugate moiety that facilitates delivery to a cell, tissue or organism.