Design, synthesis and biological characterization of novel inhibitors of CD38
作者:Min Dong、Yuan-Qi Si、Shuang-Yong Sun、Xiao-Ping Pu、Zhen-Jun Yang、Liang-Ren Zhang、Li-He Zhang、Fung Ping Leung、Connie Mo Ching. Lam、Anna Ka Yee Kwong、Jianbo Yue、Yeyun Zhou、Irina A. Kriksunov、Quan Hao、Hon Cheung Lee
DOI:10.1039/c0ob00768d
日期:——
Human CD38 is a novel multi-functional protein that acts not only as an antigen for B-lymphocyte activation, but also as an enzyme catalyzing the synthesis of a Ca2+ messenger molecule, cyclic ADP-ribose, from NAD+. It is well established that this novel Ca2+ signaling enzyme is responsible for regulating a wide range of physiological functions. Based on the crystal structure of the CD38/NAD+ complex, we synthesized a series of simplified N-substituted nicotinamide derivatives (Compound1–14). A number of these compounds exhibited moderate inhibition of the NAD+ utilizing activity of CD38, with Compound4 showing the highest potency. The crystal structure of CD38/Compound4 complex and computer simulation of Compound7 docking to CD38 show a significant role of the nicotinamide moiety and the distal aromatic group of the compounds for substrate recognition by the active site of CD38. Biologically, we showed that both Compounds4 and 7 effectively relaxed the agonist-induced contraction of muscle preparations from rats and guinea pigs. This study is a rational design of inhibitors for CD38 that exhibit important physiological effects, and can serve as a model for future drug development.
Polysubstituted benzimidazoles as antiviral agents
申请人:The Regents of the University of Michigan
公开号:US05360795A1
公开(公告)日:1994-11-01
This invention relates to novel polysubstituted benzimidazoles and compositions and their use in the treatment of viral infections. The polysubstituted benzimidazoles and compositions of the present invention exhibit antiviral properties against viruses of the herpes family, particularly human cytomegalovirus (HCMV) and herpes simplex viruses (HSV). Preferred polysubstituted benzimidazoles of the invention are 2,5,6-Trichloro-1-(.beta.-D-5-deoxyribofuranosyl)benzimidazole and 2-bromo-5,6-dichloro-1-(5-deoxy-.beta.-D-ribofuranosyl)benzimidazole.
The preparation of novel 5-amino or 7-hydroxy substituted pyrazolo[4,3-b]pyridine and pyrazolo[3,4-c]pyridine acyclic C-nucleosides is described. Their synthesis was carried out by condensation of suitably substituted lithiated picolines with 2-benzyloxyethoxymethylchloride followed by pyrazole ring annulation. The compounds were evaluated for their antiviral activity against a wide panel of viruses
The invention relates to compositions and methods of treatment using an iron chelator, an antioxidant, estrogen, and/or combinations thereof, optionally, linked to a nanoparticle, to treat a subject in need thereof. The compositions and methods may be used to restore or protect the normal functions of osteoblast and osteoclast by depleting iron and inhibiting oxidative damage. The compositions and methods may also be used to increase the bone formation rate in a subject.
A convenient synthetic method for the pharmaceutically important acyclonucleosides bearing 1,2,3-triazolines and 8-azapurines as aglycones is described.