Detection of Bacterial Neutral Ceramidase in Diabetic Foot Ulcers with an Optimized Substrate and Chemoenzymatic Probes
摘要:
摘要神经酰胺酶(CD酶)通过调节神经酰胺的组成和提供下游信号分子,在控制皮肤屏障完整性方面发挥着重要作用。虽然表皮 CD 酶的功能已为人所知,但皮肤寄居微生物分泌的中性 CD 酶的作用尚未明确。在此,我们开发了一种一步法荧光底物 S-B,用于特异性检测细菌 CD 酶活性和筛选抑制剂。我们发现了一种不可水解的底物模拟物--C6,它是最佳命中物。在 C6 的基础上,我们设计了一种光亲和探针 JX-1,它能有效地检测细菌 CD 酶。利用 JX-1,我们在铜绿假单胞菌和混合皮肤细菌培养物中鉴定出了内源性低丰度 PaCDase。利用 S-B 和 JX-1,我们发现在临床糖尿病足溃疡患者样本中,CD 酶活性与铜绿假单胞菌的相对丰度呈正相关,与伤口面积缩小呈负相关。总之,我们的研究表明,细菌 CD 酶是皮肤神经酰胺的重要调节剂,可能在伤口愈合中发挥作用。
Phosphatidylethanolamine and -choline derivatives equipped with fluorescent donor-acceptor pairs of dyes connected to the tips of the fatty acids were synthesised and shown to be suitable substrates for phospholipaseA2.
A Diversity-Oriented Strategy for Chemoenzymatic Synthesis of Glycosphingolipids and Related Derivatives
作者:Qingjiang Li、Mohit Jaiswal、Rajendra S. Rohokale、Zhongwu Guo
DOI:10.1021/acs.orglett.0c02847
日期:2020.11.6
glycan assembly and on-site lipid remodeling via chemoselective cross-metathesis and N-acylation was developed for glycosphingolipid (GSL) synthesis starting from a common, simple glycoside. The strategy was verified with a series of natural GSLs and GSL derivatives and showed several advantages. Most notably, it enabled two-way diversification of the glycan and lipid, including introduction of designed
A Diversity-Oriented Strategy for Chemical Synthesis of Glycosphingolipids: Synthesis of Glycosphingolipid LcGg4 and Its Analogues and Derivatives
作者:Rajendra S. Rohokale、Qingjiang Li、Zhongwu Guo
DOI:10.1021/acs.joc.0c02490
日期:2021.1.15
verified with the synthesis of a lacto-ganglio GSL, LcGg4, which is a biomarker of undifferentiated malignant myeloid cells, and a series of its analogues or derivatives carrying different sugar chains and unique functionalities or molecular labels. This synthetic strategy should be widely applicable and, therefore, be utilized to rapidly access various GSLs and related derivatives by using different
Synthesis, Optical Properties, and Antiproliferative Evaluation of NBD-Triterpene Fluorescent Probes
作者:Marta Medina-O’Donnell、Karina Vega-Granados、Antonio Martinez、M. Rosario Sepúlveda、José Antonio Molina-Bolívar、Luis Álvarez de Cienfuegos、Andres Parra、Fernando J. Reyes-Zurita、Francisco Rivas
DOI:10.1021/acs.jnatprod.2c00880
日期:2023.1.27
A fluorescentlabeling protocol for hydroxylated natural compounds with promising antitumor properties has been used to synthesize, in yields of 72–86%, 12 derivatives having fluorescent properties and biological activity. The reagent used for the synthesis of these fluorescent derivatives was 7-nitrobenzo-2-oxa-1,3-diazole chloride (NBD-Cl). The linkers employed to bind the NBD-Cl reagent to the natural
RADIATION DOSIMETRY SOL OR GEL AND RADIATION DOSIMETER COMPRISING SAME AS MATERIAL FOR RADIATION DOSIMETRY
申请人:Riken
公开号:EP3686632A1
公开(公告)日:2020-07-29
There is provided a radiation dosimetry sol or gel, and a radiation dosimeter containing the sol or the gel as a material for radiation dosimetry.
A radiation dosimetry sol or gel characterized by comprising a compound (A) having an excitation light-induced fluorescence property that is changed by a radiolysis product of water; and a silicate salt (B).
A radiation dosimetry sol or gel characterized by comprising a compound (A) having an excitation light-induced fluorescence property that is changed by a radiolysis product of water; a silicate salt (B); a water-soluble organic polymer (C) having an organic acid salt structure or an organic acid anion structure; and a dispersant (D) for the silicate salt (B).
A radiation dosimeter comprising, as a material for radiation dosimetry, the above-mentioned radiation dosimetry sol or gel.