Targeted therapy to a biomedical device

A - Human Necessities – 61 – M

Patent

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Details

A61M 29/00 (2006.01) A61K 39/395 (2006.01) A61K 47/48 (2006.01) A61K 51/12 (2006.01) A61F 2/06 (2006.01) A61N 5/10 (2006.01)

Patent

CA 2285324

A biomedical device assembly, such as a stent, for the targeted treatment of a tissue, such as the inhibition of restentosis. The stent is coated with an antigen, which is an example of a lock. The antigen can be bound by a labelled antibody, which is an example of a key and an effector. The antibody is preferably labelled with a radioactive source. According to one method of preparing the biomedical device assembly, after the stent has been placed in the blood vessel of the subject, the antibody is injected. The antibody then binds to the antigen on the stent, thereby localizing the radioactive source to the area to be treated, for example for restenosis. Other biomedical devices, such as a coil, an artificial valve or a vascular graft, could also be used in the place of the stent. The biomedical device could be placed in a solid tissue such as a solid tumor, or another biological passageway, such as the gastrointestinal tract, an airway or the genitourinary tract.

L'invention concerne un ensemble dispositif biomédical, comme un extenseur, destiné au traitement ciblé d'un tissu, comme l'inhibition de la résténose. L'extenseur est revêtu d'un antigène qui peut être, par exemple, du type "serrure" L'antigène peut être fixé par un anticorps marqué, qui peut être, par exemple du type "clé" et effecteur. De préférence, l'anticorps est marqué au moyen d'une source radioactive. Selon l'un des procédés de préparation de cet ensemble dispositif biomédical, après que l'on ait placé l'extenseur dans le vaisseau sanguin d'un sujet, on injecte l'anticorps, lequel se fixe alors sur l'antigène présent sur l'extenseur, localisant ainsi la source radioactive de la zone à traiter, par exemple en cas de resténose. On peut également utiliser à la place de l'extenseur d'autres dispositifs biomédicaux, tels qu'une spirale, une valvule artificielle ou une greffe vasculaire. On peut placer ce dispositif biomédical dans un tissu solide, comme une tumeur solide, ou dans un autre passage biologique, comme le tractus gastro-intestinal, un conduit aérien ou l'appareil génito-urinaire.

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