Method for viewing tumor tissue located within a body cavity

A - Human Necessities – 61 – K

Patent

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Details

A61K 49/00 (2006.01) A61B 5/00 (2006.01)

Patent

CA 2347461

Methods are provided for in vivo detection of tissue associated with a disease state in a subject, such as tumor tissue located in a body opening. In the invention method, the subject is administered a biologically compatible fluorescing targeting construct, the construct is allowed to bind to and/or be taken up by diseased tissue present in the subject, a body part of the subject suspected of containing the tumor tissue is irradiated in vivo with UV light while extraneous light to the body part is substantially eliminated, and fluorescence emanating from the fluorescing targeting construct bound to and/or taken up by the tumor tissue is directly viewed by the observer with or without the aid of an endoscope, so as to determine the location and size of the tumor tissue. The invention methods offer the advantage that diseased or abnormal tissue can be directly viewed at interior body sites with or without the aid of an endoscopic device, and without the use of additional imaging equipment, for example, through a surgical opening to facilitate a procedure of biopsy or surgical excision.

Cette invention se rapporte à des procédés servant à détecter in vivo des tissus associés à un état pathologique chez un sujet, par exemple des tissus tumoraux situés dans une cavité corporelle. Dans ce procédé, on administre au sujet un produit de synthèse de ciblage fluorescent biologiquement compatible, on laisse ce produit de synthèse se fixer aux tissus lésés présents dans le corps du sujet et/ou être absorbé par ces tissus lésés, on irradie in vivo à l'aide d'un faisceau de lumière ultraviolette la partie du corps du sujet soupçonnée de contenir les tissus tumoraux, tout en éliminant toutes les sources de lumière exogène à cette partie du corps du sujet, et on visualise directement pour observation toute fluorescence émise par le produit de synthèse de ciblage fluorescent fixé aux tissus tumoraux et/ou absorbé par les tissus tumoraux, à l'aide ou sans l'aide d'un endoscope, afin de déterminer la position et la taille de ces tissus tumoraux. De tels procédés offrent l'avantage de permettre une visualisation directe des tissus lésés ou anormaux à l'intérieur du corps d'un sujet, à l'aide ou sans l'aide d'un dispositif endoscopique et sans l'utilisation d'équipement d'imagerie supplémentaire, par exemple par une ouverture chirurgicale visant à faciliter une opération de biopsie ou d'excision.

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