A method for labeling specifically living bacteria comprising the use of modified monosaccharide compounds
申请人:Centre National de la Recherche Scientifique
(CNRS)
公开号:EP2868750A1
公开(公告)日:2015-05-06
The invention relates to a method for labeling specifically living bacteria of a given category of Gram negative bacteria in a sample comprising bacteria, the method comprising the steps of:
a) incubating said bacteria of said sample with at least one modified monosaccharide compound comprising a first reactive chemical group capable to react with a second reactive group, so that a monosaccharide residue bearing said first reactive group is incorporated into the polysaccharides of the outer membrane of such bacteria, and
b) contacting said modified monosaccharide residue incorporated within the outer membrane of the bacteria, with a labeling molecule comprising a said second reactive group.
The said modified monosaccharide compound is a compound having the following formula (I), or a salt thereof:
Wherein X can be O, NH or S, R1, R2 and R3 can be independently H, OH, NH2, OH and NH2 being substituted or not by protecting groups thereof, and R4 is H or an alkyl chain in C1 to C4 and at least one of X, R1, R2, R3 and R4 groups being substituted by a said first reactive group R'1.
本发明涉及一种对包含细菌的样品中特定类别的革兰氏阴性活细菌进行标记的方法,该方法包括以下步骤:
a) 将所述样品中的细菌与至少一种改性单糖化合物一起培养,该改性单糖化合物包含能与第二反应基团反应的第一反应化学基团,从而使带有所述第一反应基团的单糖残基结合到这些细菌外膜的多糖中,以及
b) 将细菌外膜中的所述改性单糖残基与包含所述第二反应基团的标记分子接触。
所述改性单糖化合物是具有下式 (I) 的化合物或其盐:
其中,X 可以是 O、NH 或 S,R1、R2 和 R3 可以独立地是 H、OH、NH2,OH 和 NH2 是否被其保护基团取代,R4 是 H 或 C1 至 C4 的烷基链,且 X、R1、R2、R3 和 R4 中至少有一个基团被所述第一反应基团 R'1 取代。