Design, synthesis and evaluation of protein disulfide isomerase inhibitors with nitric oxide releasing activity
摘要:
Protein disulfide isomerase (PDI), a chaperone protein mostly in endoplasmic reticulum, catalyzes disulfide bond breakage, formation, and rearrangement to promote protein folding. PDI is regarded as a new target for treatment of several disorders. Here, based on the combination principle, we report a new PDI reversible modulator 16F16A-NO by replacing the reactive group in a known PDI inhibitor 16F16 with nitric oxide (NO) donor. Using molecular docking experiment, 16F16A-NO could embed into the active cavity of PDI. From newly developed fluorescent assay, 16F16A-NO showed rapid NO release. Furthermore, it is capable to moderately inhibit activity of PDI and S-nitrosylate the protein, indicating by insulin aggregation assay and biotin-switch technique. Finally, it displayed a dose-dependent antiproliferative activity against SH-SY5Y and HeLa tumor cells. Our designed hybrid compound 16F16A-NO showed a reasonable activity and might offer a promising avenue to develop novel PDI inhibitors for disease treatments.
The present invention provides compounds, compositions and methods for the selective inhibition of cathepsin S. In a preferred aspect, cathepsin S is selectively inhibited in the presence of at least one other cathepsin isozyme (e.g., cathespin K). The present invention also provides methods for treating a disease state in a subject by selectively inhibiting cathepsin S.
Novel Cyclic Urea Derivatives, Preparation Thereof and Pharmaceutical Use Thereof as Kinase Inhibitors
申请人:HALLEY Frank
公开号:US20090082379A1
公开(公告)日:2009-03-26
Compounds of formula (I):
wherein Ra, Rb, R, X
1
and X
2
are as defined in the disclosure, pharmaceutical compositions comprising said compounds, processes for making and methods of using the same are provided.
Useful Reagents for Introduction of Boc and Fmoc Protective Groups to Amines: Boc-DMT and Fmoc-DMT
作者:Munetaka Kunishima、Kazuhito Hioki、Mizuho Kinugasa、Michiko Kishimoto、Miho Fujiwara、Shohei Tani
DOI:10.1055/s-2006-942389
日期:2006.6
New amino-protecting reagents, Boc-DMT and Fmoc-DMT, were prepared, and found to be useful for the introduction of Boc and Fmoc groups into amines. Both the reagents can protect various amines including amino acids in good yield in aqueous media. Since the reagents are neither unstable nor irritating, they are practically useful.
The present invention relates to compounds of the formula
which are useful in treating diseases characterized by the hyperactivity of MEK. Accordingly the compounds are useful in the treatment of diseases, such as, cancer, cognative and CNS disorders and inflammatory/autoimmune diseases.
known, the heterocyclic imines 2,5-dihydro-1,3-thiazoles are convertible to bisamides with the aid of a carboxylic acid and an isocyanide (Ugi reaction). Herein, it is shown that 2,5-dihydro-1,3-thiazole S-monoxides-the respective alpha-sulfinyl imines-are characterized by an altered reaction behavior. In a hitherto unknown multicomponent reaction the alpha-sulfinyl imines react with an isocyanide