预警NMR:一种快速而强大的实验方法,用于检测生化查中的反应性假阳性
Jeffrey R Huth1, Renaldo Mendoza, Edward T Olejniczak
1Global Pharmaceutical Research and Development, Abbott Laboratories, Abbott Park, Illinois 60064, USA.
Journal of the American Chemical Society
|January 6, 2005
概括
一种新的核磁共振 (NMR) 试验,ALARM NMR,在药物发现查中快速识别反应性假阳性. 这种方法可以检测出反应性杂质和分解产物,从而改善冲击分类,减少对不可活性的的浪费资源.
科学领域:
- 药用化学 医学化学
- 药物发现 药物发现 药物发现
- 生物化学 生物化学
背景情况:
- 高通量选 (HTS) 产生了大量的小分子命中,需要仔细评估.
- 现有的过工具往往无法识别反应性假阳性,导致在非可行的药物线索上浪费资源.
- 反应性化合物,包括杂质和分解产物,可以干扰药物向相互作用.
研究的目的:
- 开发和验证一种基于核磁共振 (NMR) 的快速,可靠的方法,用于识别HTS中的反应假阳性.
- 评估化合物的硫醇反应性及其氧化或化蛋白标的潜力.
- 通过早期识别有害化合物,改善药物发现中的命中分类过程.
主要方法:
- 开发ALARM NMR (通过核磁共振检测反应分子的La试验) 试验.
- 监测在测试化合物的存在下,人类La抗原的DTT-依赖的 (13)C化学转移变化.
- 通过与基于谷氨的光试验进行比较验证,并对来自HTS的3500多种化合物进行测试.
主要成果:
- ALARM NMR可靠地识别出反应性假阳性,包括杂质和分解产物.
- 该试验在检测多样化的化合物库中醇反应性方面表现出高灵敏度.
- 目前的in silico过工具未能识别ALARM NMR检测到的一半以上的活性化合物.
- 报警的NMR数据在防止对优化反应性化合物的优先考虑方面发挥了关键作用.
结论:
- ALARM NMR 是在药物发现中识别反应性假阳性的一个有价值的工具,它补充了现有的方法.
- 该试验通过早期检测有问题的化合物来提高击中分拣的效率.
- 这些发现强调了当前in silico工具的局限性,并强调了对化合物反应性的实验验证的必要性.
相关概念视频
PCR - Polymerase Chain Reaction
Overview
Nuclear Magnetic Resonance (NMR): Overview
Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
NMR Spectrometers: Overview
NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
Applications Of NMR In Biology
Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...
The...
Other Nuclides: 31P, 19F, 15N NMR
Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a high...
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a high...
High-Performance Liquid Chromatography: Types of Detectors
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...


