Inhibition of Cancer-Associated Mutant Isocitrate Dehydrogenases by 2-Thiohydantoin Compounds
摘要:
Somatic mutations of isocitrate dehydrogenase 1 (LDH1) at R132 are frequently found in certain cancers such as glioma. With losing the activity of wild-type IDH1, the R132H and R132C mutant proteins can reduce alpha-ketoglutaric acid (alpha-KG) to D-2-hydroxyglutaric acid (D2HG). The resulting high concentration of D2HG inhibits many alpha-KG-dependent dioxygenases, including histone demethylases, to cause broad histone hypermethylation. These aberrant epigenetic changes are responsible for the initiation of these cancers. We report the synthesis, structure activity relationships, enzyme kinetics, and binding thermodynamics of a novel series of 2-thiohydantoin and related compounds, among which several compounds are potent inhibitors of mutant IDH1 with K-i as low as 420 nM. X-ray crystal structures of IDH1(R132H) in complex with two inhibitors are reported, showing their inhibitor-protein interactions. These compounds can decrease the cellular concentration of D2HG, reduce the levels of histone methylation, and suppress the proliferation of stem-like cancer cells in BT142 glioma with IDH1 R132H mutation.
New 7-substituted quinolone antibacterial agents. The synthesis of 1-ethyl-1,4-dihydro-4-oxo-7-(2-thiazolyl and 4-thiazolyl)-3-quinolinecarboxylic acids
作者:Townley P. Culbertson、John M. Domagala、Phred Peterson、Shannon Bongers、Jeffrey B. Nichols
DOI:10.1002/jhet.5570240604
日期:1987.11
4-dihydro-4-oxo-7-(4-thiazolyl)-3-quinolinecarboxylic acids and 1-ethyl-1,4-dihydro-4-oxo-7-(2-thiazolyl)-3-quinolinecarboxylic acids were prepared. Also prepared was 10-[2-(aminomethyl)-4-thiazolyl]-9-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid. Analogs with basic amine substituents on the thiazole moiety were found to have antibacterial activity.
一系列1-乙基-1,4-二氢-4-氧代-7-(4-噻唑基)-3-喹啉羧酸和1-乙基-1,4-二氢-4-氧代-7-(2-噻唑基制备)-3-喹啉羧酸。还制备了10- [2-(氨基甲基)-4-噻唑基] -9-氟-2,3-二氢-3-甲基-7-氧代-7 H-吡啶基[1,2,3- de ] [1 ,4]苯并恶嗪-6-羧酸。发现在噻唑部分具有碱性胺取代基的类似物具有抗菌活性。
Ultrashort acting hypnotic barbiturates
申请人:——
公开号:US20020013330A1
公开(公告)日:2002-01-31
The subject invention concerns novel compounds that are useful as ultrashort acting hypnotic barbiturates. Specifically exemplified are derivatives of barbituric and thiobarbituric acids. They are rapidly metabolized by blood and tissue enzymes to form polar metabolites with no hypnotic activity and which are rapidly eliminated.
One-Pot Multicomponent Synthesis of Thiourea Derivatives in Cyclotriphosphazenes Moieties
作者:Zainab Ngaini、Wan Sharifatun Handayani Wan Zulkiplee、Ainaa Nadiah Abd Halim
DOI:10.1155/2017/1509129
日期:——
In this study, hexasubstituted thiourea was carried out via reaction of isothiocyanato cyclophosphazene intermediates with a series of aromatics amines and amino acids in a one-pot reaction system. The reaction was not as straightforward as typical thioureasynthesis. Six unexpected thiourea derivatives 3a–f were formed in the presence of cyclotriphosphazene moieties in good yields (53–82%). The structures
Thiazole derivatives which are angiotensin II receptor antagonists,
申请人:Laboratoires UPSA
公开号:US05192781A1
公开(公告)日:1993-03-09
The present invention relates to the derivatives of formula (I): ##STR1## and their addition salts, and to their use in therapeutics, especially for the treatment of cardiovascular diseases and in particular for the treatment of hypertension and cardiac insufficiency.
Synthesis and Biological Activity of Aminoguanidine and Diaminoguanidine Analogues of the Antidiabetic/Antiobesity Agent 3-Guanidinopropionic Acid
作者:Valerie A. Vaillancourt、Scott D. Larsen、Steven P. Tanis、Jeffery E. Burr、Mark A. Connell、Michele M. Cudahy、Bruce R. Evans、Peter V. Fisher、Paul D. May、Martin D. Meglasson、Deborah D. Robinson、F. Craig Stevens、John A. Tucker、Thomas J. Vidmar、Jen H. Yu
DOI:10.1021/jm000094n
日期:2001.4.1
3-Guanidinopropionic acid (1) has been demonstrated both to improve insulin sensitivity and to promote weight loss selectively from adipose tissue in animal models of non-insulin-dependent diabetes mellitus (NIDDM). However, 1 has also been shown to be a substrate for both the creatine transporter and creatine kinase, leading to marked accumulation in muscle tissue as the corresponding N-phosphate. The corresponding aminoguanidine analogue 2 was recently discovered to retain the antidiabetic activity of 1 while being markedly less susceptible to creatine-like metabolism, suggesting that it should have less potential to accumulate in muscle. Further structural modification of 2 was undertaken to investigate whether the antidiabetic potency could be augmented while maintaining resistance to creatine-like metabolism. Modifications such as a-alkylation, homologation, and bioisosteric replacement of the aminoguanidine all were detrimental to antidiabetic activity. However, the simple regioisomeric aminoguanidinoacetic acid 9 and diaminoguanidinoacetic acid-analogue 7 were found to be equipotent to 2, leading eventually to the discovery of the significantly more potent diaminoguanidinoacetic acid regioisomers 52 and 53. Further attempts to modify the more active template represented by 52 led only to reductions in; antidiabetic activity. Each of the new active analogues displayed the same resistance to creatine-like metabolism as 2. Further testing of 7, 9, and 53 in obese diabetic ob;lob mice confirmed that weight loss is induced selectively from adipose tissue, similar to the lead 1. Administration of 53 to insulin-resistant rhesus monkeys led to reductions in both fasting and post-prandial plasma glucose levels with concomitant reductions in plasma insulin levels, suggesting that the compound improved the action of endogenous insulin. Compounds 7 and 53 were selected for further preclinical development.