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    • 1. 发明申请
    • NANO-SCALE FLUORO-BIOSENSORS EXHIBITING A LOW FALSE ALARM RATE FOR RAPID DETECTION OF BIOLOGICAL CONTAMINANTS
    • 展示生物污染物快速检测的低错误报警率的纳米级荧光生物传感器
    • US20090270269A1
    • 2009-10-29
    • US12110386
    • 2008-04-28
    • Ashok KumarLarry D. StephensonJeremy A. HaleElizabeth J. Norton
    • Ashok KumarLarry D. StephensonJeremy A. HaleElizabeth J. Norton
    • C12M1/34G01N33/50C40B30/04
    • G01N33/542G01N21/6428G01N33/54366G01N2021/6432
    • A sensing system incorporating a nano-scale fluoro-biosensor for detection of specifically targeted bio-contaminants (targets). Select embodiments use fluorescent nanoparticles such as quantum dots (QD) conjugated to antibody fragments to form a sensor for a specific bio-contaminant based on fluorescent resonance energy transfer (FRET). A quenching dye may be used to label an analog, while a specific antibody is covalently bonded to a hydrophilic QD. Coupling of QD labeled antibodies and quencher labeled analogs provides enough proximity to produce appreciable FRET-based quenching. Any addition of the target displaces the dye-labeled bacteria, eliminating FRET-based quenching and results in a concentration-dependent increase in QD photoluminescence. Applications include rapid detection and identification, with a high degree of specificity and sensitivity, of a broad range of targets, including viral contaminants, e.g., in less than about three minutes. By using QDs of varying wavelengths the system may be adapted into a multiplexing immuno-assay.
    • 包含用于检测特异性靶向生物污染物(靶)的纳米级氟生物传感器的感测系统。 选择实施方案使用与抗体片段缀合的荧光纳米颗粒例如量子点(QD),以形成基于荧光共振能量转移(FRET)的特定生物污染物的传感器。 可以使用淬灭染料来标记类似物,而特异性抗体与亲水性QD共价结合。 QD标记的抗体和猝灭标记的类似物的偶联提供足够的接近度以产生明显的基于FRET的淬灭。 目标的任何添加取代了染料标记的细菌,消除了基于FRET的猝灭,并导致QD光致发光的浓度依赖性增加。 应用包括快速检测和鉴定,具有高度特异性和灵敏度的广泛靶标,包括病毒污染物,例如在少于约3分钟内。 通过使用不同波长的量子点,该系统可以适应多路复用免疫测定。