Dendritic supramolecular compound for electrochemiluminescent analysis
申请人:Zhou Ming
公开号:US20050059834A1
公开(公告)日:2005-03-17
Dendritic, polynuclear, metal complexes are used as new luminescent labels for immunoassays and DNA probes by means of electrochemiluminescence. The dendritic polynuclear molecules are composed of multiple luminophors which are preferably ruthenium (II) tris(bipyridyl) complexes, [Ru(bpy)
3
]
2+
, which define the peripheral or terminal moieties of the dendritic molecules.
Multilabeling Biomolecules at a Single Site. 1. Synthesis and Characterization of a Dendritic Label for Electrochemiluminescence Assays
作者:Ming Zhou、Jacques Roovers、Gilles P. Robertson、Chander P. Grover
DOI:10.1021/ac034664d
日期:2003.12.1
Ultrasensitive bioanalytical assays are of great value for early detection of human diseases and pathogens. The sensitivities of immunoassays and DNA probing can be enhanced by multilabeling the biorecognition partner used for affinity-based assays. However, the bioreactivity of biomolecules is affected by a high degree of multilabeling at multiple functional sites. It is proposed that dendritic scaffoldings be used to link multiple signal-generating units to a single site with potentially minimum impact on the bioaffinity. A prototype label, a zeroth-generation dendron, bearing three [Ru(bpy)3]2+ units for electrochemiluminescence (ECL) assays was synthesized and characterized preliminarily by spectroscopic, electrochemical, and ECL methods. No evidence of interaction between the neighboring [Ru(bpy)3]2+ units in the label molecule was found from these characterizations. Both the photoluminescence and ECL of the prototype label have features very similar to those of mononuclear [Ru(bpy)3]2+ compounds. Labeling a model protein with a triad of [Ru(bpy)3]2+ at one NH2 position was demonstrated. The results reported here provide support to applying the proposed multilabeling strategy to affinity-based bioanalytical assays.