Biologic bioadhesive compositions containing fibrin glue and...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/127 (2006.01) A61K 47/42 (2006.01) A61L 24/00 (2006.01) A61L 24/04 (2006.01) A61L 24/10 (2006.01)

Patent

CA 2183430

The present invention describes a biologically compatible bioadhesive composition fibrin glue and liposomes for use in mammals, including humans. Fibrin glue of the invention comprises fibrinogen and thrombin which are mixed together in various modes with liposomes and applied to a site of injury, to a wound, or to a surgical or nonsurgical incision or opening. In accordance with the invention, the liposomes are embedded within the fibrin glue after coagulation has occured, and may release bioactive substances contained within their acqueous interiors to promote healing and protection during the recovery process. The bioadhesive composition of the invention promises to maintain hemostasis after surgeries and improves upon existing glues or gel formulations due to its complete biological compatibility, its formation in situ, and its provision of bioactive therapeutics via entrapped liposomes directly to the site. Long- lasting biophysical and biomechanical properties as well as therapeutic value are imparted to the fibrin glue components by the liposome component of the composition. The bicompatible fibrin glue and liposome composition is also amenable for fabrication into films, coatings, or membranes for in vitro and in vivo uses.

La présente invention concerne une composition d'obturation bioadhésive et qui est compatible du point de vue biologique. Cette composition qui contient une colle de fibrine et des liposomes, et elle est destinée à être utilisée chez les mammifères, dont les humains. La colle de fibrine selon l'invention contient un fibrinogène et de la thrombine qui sont mélangés ensemble de différentes manières avec des liposomes, et appliqués sur le site d'une blessure, d'une plaie ou d'une incision ou ouverture chirurgicale ou non chirurgicale. Selon l'invention, les liposomes sont emprisonnés dans la colle de fibrine après la coagulation, et peuvent libérer les substances bioactives contenues dans leur partie interne aqueuse, en vue de favoriser la cicatrisation ou d'assurer une protection au cours de la guérison. La composition bioadhésive de l'invention permet de maintenir l'hémostase après des opérations chirurgicales et d'améliorer les formulations de colles ou de gels, grâce à sa totale compatibilité biologique, sa formation in situ et son apport direct au site d'éléments thérapeutiques bioactifs par l'intermédiaire des liposomes piégés. Les composants de la colle de fibrine présentent des propriétés biophysiques et biomécaniques durables, auxquelles viennent s'ajouter les propriétés thérapeutiques grâce aux liposomes de la composition. La composition biocompatible à base de colle de fibrine et de liposomes peut également être produite sous forme de films, de revêtements ou de membranes, pour des utilisations in vitro et in vivo.

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