Water-soluble fluoro-substituted cyanine dyes as reactive fluorescence labelling reagents
申请人:GE Healthcare UK Limited
公开号:US07767829B2
公开(公告)日:2010-08-03
Disclosed are cyanine dyes that are useful for labelling and detecting biological and other materials. The dyes are of formula (I):
in which at least one of groups R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 R11, R12, R13 and R14 is -L-M or -L-P, where L is a linking group, M is a target bonding group and P is a conjugated component, and at least one of groups R3, R4, R5, R6, R7, R8, R9 and R10 comprises fluorine. The use of cyanine dyes substituted by fluorine and having additional substitution with three or more sulphonic acid groups for labelling biological target molecules results in a labelled product in which there is reduced dye-dye aggregation and improved photostability, compared with cyanine dyes having no such substitutions. The dyes of the present invention are particularly useful in assays involving fluorescence detection where continual or repeated excitation is a requirement, for example in kinetic studies, or in microarray analyses where microarray slides may need to be reanalysed over a period of days.
本发明涉及一种靛氰染料,可用于标记和检测生物和其他材料。该染料的化学式为(I):其中R1、R2、R3、R4、R5、R6、R7、R8、R9、R10、R11、R12、R13和R14中至少有一个是-L-M或-L-P,其中L是连接基,M是目标结合基团,P是共轭组分,并且R3、R4、R5、R6、R7、R8、R9和R10中至少有一个包含氟。使用经氟取代并具有三个或更多磺酸基团的靛氰染料标记生物靶分子,结果得到一个标记产品,其中相比于没有这样的取代的靛氰染料,染料-染料聚集减少,光稳定性提高。本发明的染料在涉及荧光检测的分析中特别有用,其中需要连续或重复的激发,例如在动力学研究中,或在微阵列分析中,可能需要在数天内重新分析微阵列幻灯片。