氘标记的具有完全([2H(35)]-MSG)和选择性([11-(2)H(2)]-MSG)氘代链的氘标记单硬脂酰甘油已被合成,并用作2H NMR的探针。在低温下,甘油单酸酯-水系统形成粗相或结晶相,其随着温度升高而转变成凝胶相,液晶相和立方相。2 H NMR谱显示出代表这些相的特征。凝胶相是亚稳态的,并在低于40摄氏度的温度下逐渐转变为壁age。过冷的立方相在数天之内转变为液晶相。在液晶相中,链序分布表明链向甲基的柔性增加。在液晶相中 双层在磁场中自发排列,其法线垂直于磁场。结果表明,2 H NMR可作为研究不同甘油一酸酯-水相的结构和动力学的便捷工具。
Development of isotope-enriched phosphatidylinositol-4- and 5-phosphate cellular mass spectrometry probes
作者:Amélie M. Joffrin、Alex M. Saunders、David Barneda、Vikki Flemington、Amber L. Thompson、Hitesh J. Sanganee、Stuart J. Conway
DOI:10.1039/d0sc06219g
日期:——
divergent synthetic route applicable to the synthesis of deuterated PtdIns4P and PtdIns5P derivatives. The synthetic strategy developed involves a key enzymatic desymmetrisation step using Lipozyme TL-IM®. In addition, we optimised the large-scale synthesis of deuterated myo-inositol, allowing for the preparation of a series of saturated and unsaturateddeuterated PtdIns4P and PtdIns5P derivatives. Experiments
合成磷脂酰肌醇磷酸酯 (PtdIns P n ) 衍生物在拓宽我们对 PtdIns P n代谢的理解方面发挥着关键作用。然而,此类工具的开发依赖于有效的对映选择性和区域选择性合成策略。在这里,我们报告了适用于合成氘化 PtdIns4 P和 PtdIns5 P衍生物的不同合成路线的发展。开发的合成策略涉及使用 Lipozyme TL-IM® 的关键酶解对称步骤。此外,我们优化了氘代肌醇的大规模合成,允许制备一系列饱和和不饱和的氘代PtdIns4 P和 PtdIns5 P衍生物。在 MCF7 细胞中进行的实验表明,这些氘化探针能够量化细胞环境中相应的内源性磷脂。总的来说,这些氘化探针将成为帮助我们更好地了解 PtdIns P n在生理学和疾病中所起作用的强大工具。
Synthesis of ceramides NS and NP with perdeuterated and specifically ω deuterated<i>N</i>-acyl residues
The synthesis of 12 deuterated ceramides with either a deuteration at the last carbon atom of the amide bound fatty acid or a perdeuterated fatty acid chain is described. The ceramides were prepared starting from sphingosine or phytosphingosine and ω deuterated or perdeuterated fatty acids with PyBOP® as activating agent in high yields. For the synthesis of the specifically deuterated fatty acids,
Synthesis of a Deuterium-Labeled Globotriaosylceramide Probe for Potential Imaging of Subcellular Localization of Gb3 Using NanoSIMS
作者:M. R. E. Aly、I. H. El Azab
DOI:10.1134/s1070428021100213
日期:2021.10
Abstract Globotriaosylceramide (Gb3) is a cell membrane glycosphingolipid expressed by renal cells and gastrointestinal tract and overexpressed by many carcinomas. Subcellular distribution of this biomarker is highly significant for the development of drugs and therapy of diseases related to its interactions with cell surface. This paper describes a simple method for the synthesis of a deuterium-labeled
Fatty acid synthesis pathway provides lipid precursors for rhamnolipid biosynthesis in Burkholderia thailandensis E264
作者:Victor U. Irorere、Thomas J. Smyth、Diego Cobice、Stephen McClean、Roger Marchant、Ibrahim M. Banat
DOI:10.1007/s00253-018-9059-5
日期:2018.7
rhamnolipid with odd and even carbon chain lipid moieties using odd carbon chain fatty acid substrates (up to 45.97 and 67.57%, respectively). In contrast, B. thailandensis produced rhamnolipid with predominantly even carbon chain lipid moieties (up to 99.26). These results indicate the use of the fatty acid synthesis (FAS II) pathway as the main source of lipidprecursors in rhamnolipid biosynthesis by B.
Disclosed are methods and materials for obtaining spatially resolved images of specific types of tissues. The method for imaging tissue comprises administering to the tissue a deuterated imaging agent and performing spectroscopy, preferably Raman spectroscopy. Electromagnetic radiation, such as a near infrared laser beam, is directed to a tissue of interest. The radiation can be scanned across and within the tissue of interest. When used in combination with a light collection system, it is possible to map out a specific volume of tissue, obtaining information regarding the distribution of specific endogenous chemical species. In some embodiments, specific imaging agents are employed to impart contrast between chemically different types of tissues.