Resonance energy transfer based detection of nosocomial...

G - Physics – 01 – N

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G01N 21/00 (2006.01) G01N 33/53 (2006.01) G01N 33/535 (2006.01) G01N 33/569 (2006.01)

Patent

CA 2705783

Disclosed herein are methods and devices for detection of hospital acquired infections. Disclosed methods may be utilized for continuous in vivo monitoring of a potential infection site or for periodic in vitro monitoring of tissue or fluid from a patient and may be utilized to alert patients and/or health care providers to the presence of a pathogen at an early stage of infection. Disclosed methods utilize fluorophore pairs that optically interact with one another according to Forster resonance energy transfer (FRET) or bioluminescence resonance energy transfer (BRET) mechanism. One member of the pair or a cofactor that interacts with an enzyme to form a member of the pair may be tethered to a device by a substrate that is specific for an enzyme expressed by a targeted pathogen. Upon interaction of the enzyme with the substrate, an optically detectable signal may be altered or initiated, detection of which may then provide information as to the existence of the pathogen at the site.

L'invention concerne des procédés et des dispositifs destinés à détecter des infections nosocomiales. Ces procédés peuvent être utilisés dans le suivi in vivo continu d'un site potentiel d'infection ou dans le suivi in vitro périodique de tissus ou de fluides d'un patient et peuvent être utilisés pour informer des patients et/ou des soignants de la présence d'un pathogène à un stade précoce de l'infection. Ces procédés utilisent des paires de fluorophores qui interagissent optiquement entre elles en fonction d'un mécanisme de transfert d'énergie par résonance de Forster (FRET) ou de transfert d'énergie par résonance de bioluminescence (BRET). Un élément de la paire ou un cofacteur qui interagit avec une enzyme pour former un élément de la paire peut être rattaché à un dispositif par un substrat spécifique à une enzyme exprimée par un pathogène cible. Lors de l'interaction de l'enzyme avec un substrat, un signal détectable optiquement peut être modifié ou amorcé, sa détection pouvant ensuite fournir des informations sur l'existence du pathogène au niveau du site d'intérêt.

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