Synthesis and cytotoxic activity of steroid-anthraquinone hybrids
摘要:
Synthesis of cytotoxic steroidal derivatives containing a quinone moiety is described. The synthetic strategy is based on an unsual A + CD --> ABCD Diels-Alder approach which generates 9 beta-H cholestane analogs. The adducts formed are efficiently aromatized in basic media to give steroid-anthaquinones hybrids showing interesting cytotoxic activity on four tumor cell lines. (C) 1997 Elsevier Science Ltd.
Probing the structural requirements for vitamin D3 inhibition of the hedgehog signaling pathway
作者:Albert M. DeBerardinis、Upasana Banerjee、Michele Miller、Steven Lemieux、M.K. Hadden
DOI:10.1016/j.bmcl.2012.05.037
日期:2012.7
A structure–activityrelationshipstudy to elucidate the structural basis for hedgehog (Hh) signaling inhibition by vitaminD3 (VD3) was performed. Functional and non-functional regions of VD3 and VD2 were obtained through straightforward synthetic means and their biological activity was determined in a variety of cell-based assays. Several of these compounds inhibited Hh signaling at levels comparable
Synthesis and cytotoxic activity of steroid-anthraquinone hybrids
作者:Francesco De Riccardis、Irene Izzo、Marcello Di Filippo、Guido Sodano、Fulvio D'Acquisto、Rosa Carnuccio
DOI:10.1016/s0040-4020(97)00693-5
日期:1997.8
Synthesis of cytotoxic steroidal derivatives containing a quinone moiety is described. The synthetic strategy is based on an unsual A + CD --> ABCD Diels-Alder approach which generates 9 beta-H cholestane analogs. The adducts formed are efficiently aromatized in basic media to give steroid-anthaquinones hybrids showing interesting cytotoxic activity on four tumor cell lines. (C) 1997 Elsevier Science Ltd.
A nanostructured label-free platform based on an ultrathin film for ultrasensitive detection of a secosteroid hormone
作者:Paulo A. Raymundo-Pereira、Alan R. F. Lima、Sergio A. S. Machado
DOI:10.1039/c6ra04740h
日期:——
was achieved using the LN-NO architecture, on a label-free platform, and nanostructures with sizes ranging between 50 and 100 nm were well distributed throughout the nanoxide. The detection of the secosteroid was performed at a low potential (0.46 V vs. Ag/AgCl) in a range between 0 and 2.6 × 10−5 mol L−1, with a detection limit of 8.3 × 10−7 mol L−1, which is considerably competitive with similar devices
我们报道了钙钛矿型LaNiO 3的电催化活性-N氧化物(LN-NO)在碱性溶液中对类固醇激素的氧化作用。LN-NO是通过Pechini方法合成的,并在973 K下在空气中煅烧2 h。随后,通过高分辨率透射电子显微镜(HR-TEM),能量色散X射线(EDX),X射线光电子能谱(XPS),X射线衍射仪(XRD)和电化学对LN-NO材料进行了研究。循环伏安法(CV),方波伏安法(SWV)和电化学阻抗谱(EIS)等技术。XRD图谱的Rietveld细化表明仅存在LN-NO。在无标记的平台上使用LN-NO结构可实现最佳的电催化活性,并且大小在50到100 nm之间的纳米结构可以很好地分布在整个纳米氧化物中。相对于Ag / AgCl)在0到2.6×10 -5 mol L -1之间,检测极限为8.3×10 -7 mol L -1,与同类设备相比具有相当的竞争力。LN-NO纳米结构无标记平台作为伏安传感器的应用显示出17