摘要:
The present invention describes methods and compositions of hydrogel microspheres for inducing macrophage conversion by sequentially converting a first population of wound macrophages in a wound to M2A macrophages by exposing the first population of wound macrophages to IL-4 and converting a second population of wound macrophages to M2C macrophages by exposing the second population of wound macrophages to IL-10. One aspect describes a method of inducing macrophage conversion in a wound. Another aspect describes compositions and methods of preparing a hydrogel microsphere for wound healing. Yet another aspect describes methods for treating a chronic wound with hydrogel microspheres.
摘要:
Die Erfindung betrifft ein biodegradierbares Vlies enthaltend (i) wenigstens ein Polymer zum Induzieren der primären Hämostase, (ii) wenigstens einen nichtproteinogenen, niedermolekularen, in Wasser löslichen Aktivator der sekundären Hämostase und (iii) wenigstens einen nicht-proteinogenen, niedermolekularen, in Wasser löslichen Inhibitor der Fibrinolyse. Die Erfindung betrifft auch ein Verfahren zur Herstellung eines biodegradierbaren Vlieses bei dem (i) ein fluidisiertes Faserrohmaterial gegebenenfalls mit Additiven in ein Behältnis gegeben wird, (ii) das Behältnis in Rotation versetzt wird, (iii) das fluidisierte Faserrohmaterial durch Zentrifugalkräfte aus dem Behältnis ausgetragen wird, wodurch Fasern oder Filamente gebildet werden, und (iv) aus den Fasern oder Filamenten ein biodegradierbares Vlies gebildet wird. Die Erfindung betrifft auch die Verwendung eines solchen biodegradierbaren Vlieses als lokales Hämostyptikum.
摘要:
The present invention provides a wound dressing comprising a tessellated water-soluble molding matrix comprised of a polymer selected from the group consisting of polyvinyl alcohol, gelatin, and mixtures thereof and a 1,1-disubstituted ethylene monomer. The present invention further provides methods of using the wound dressing and kits containing the wound dressing.
摘要:
The present invention relates to a medicament comprising a biopolymer matrix comprising gelatin cross-linked with an oxidized polysaccharide. Preferably said oxidized polysaccharide comprises an oxidized dextran or an oxidized xanthan. Preferably said medicament is a wound dressing. Preferably said matrix is in the form of a hydrated film, a hydrated or dry foam, dry fibres which may be fabricated into a woven or non-woven tissue, hydrated or dry micro beads, dry powder; or said matrix is covered with a semipermeable film, so as to control the humidity of the wound covered with the dressing, with the permeability chosen so as to maintain this humidity within a therapeutically optimal window. The invention also relates to a controlled release device comprising a biopolymer matrix comprising gelatin cross-linked with an oxidized polysaccharide into which a therapeutically effective amount of a drug is non-covalently incorporated. Preferably also additional compounds are immobilized, said compounds having substantial affinity for the incorporated drug, so as to slow down the release of the drug from the matrix and/or stabilizing the drug. The present invention also relates to a wound dressing comprising such a slow or controlled release device. Preferably said matrix is covered with a semipermeable film, with a permeability chosen so as to control the humidity of the wound covered with the dressing, and to maintain the humidity within a therapeutically optimal window. Preferably multiple forms of said matrix are combined to form a wound dressing, each form having different properties with respect to chemical composition and physical and controlled release characteristics. Preferably into each of the multiple forms one or more different active factors are non-covalently incorporated. Preferably, the invention relates to a wound dressing wherein one or more of the active factors belong to any of the following groups: EGF-like factors, FGF-like factors, TGF- beta -like factors, IGF-like factors, PDGF-like factors, keratinocyte cell lysate. The invention further relates to methods of producing and using said wound dressings or said controlled or slow release devices as defined above.
摘要:
Thus, the present invention provides a composition in powder form comprising highly dispersed silica particles, polymethylsiloxane particles, and at one or both of a cationic surfactant and an antimicrobial substance, wherein at least 25 % by weight of the cationic surfactant is present in primary polymethylsiloxane particles carrying the cationic surfactant on their surface and/or in agglomerates of these primary particles, and/or at least 25 % by weight, of the antimicrobial substance is present in primary highly dispersed silica particles carrying the antimicrobial substance on their surface and/or in agglomerates of these primary particles.
摘要:
The invention discloses a method for producing a hemostatic composition comprising mixing a biocompatible polymer suitable for use in hemostasis and a genipin-type crosslinker, crosslinking said polymer by said genipin-type crosslinker to obtain a crosslinked biocompatible polymer, and finishing said crosslinked polymer to a pharmaceutically acceptable hemostatic composition, new hemostatic compositions and methods for using such compositions.
摘要:
In various embodiments, the present disclosure provides a coated device comprising: a substrate; a film coating at least part of the substrate, which film comprises a multilayer unit comprising a first layer and a second layer associated with one another via a hydrogen bond, wherein the first layer comprises a first natural polymeric material and a hydrogen bond donor and wherein the second layer comprises a second natural polymeric material and a hydrogen bond acceptor; and an agent for delivery associated with the coated device such that, decomposition of one or more layers of the film results in release of the agent. In various embodiments, a coated device comprising: a substrate; a film coating at least part of the substrate, which film comprises a multilayer unit comprising a tetralayer with alternating layers of opposite charge; and an agent for delivery associated with the coated device such that, decomposition of one or more layers of the film results in release of the agent.
摘要:
Improved compositions comprising a cross-linkable protein or polypeptide, and a non-toxic material which induces cross-linking of the cross-linkable protein. The compositions are optionally and preferably prepared in a non-phosphate buffer solvent. Optionally and preferably, the cross-linkable protein includes gelatin and any gelatin variant or variant protein as described herein. Optionally and preferably, the non-toxic material comprises transglutaminase (TG), which may optionally comprise any type of calcium dependent or independent transglutaminase, which may for example optionally be a microbial transglutaminase (mTG).
摘要:
Substantially non-adhesive hydrogels are useful as wound dressings, wound barriers, therapeutic drug delivery devices and the like. The substantially non-adhesive hydrogels are synthesized by a method that comprises irradiating a solution comprising a biological polymer that is biodegradable and biocompatible, using ionizing radiation, whereby free radicals of the biological polymer are formed and cross-linking occurs between the biological polymer radicals to provide the hydrogel.
摘要:
The present disclosure relates to a method for vacuum expansion of a paste prior to freeze-drying said paste to achieve a dry paste composition which reconstitutes efficiently to form a flowable paste upon addition of an aqueous medium. The present disclosure further relates to a syringe for retaining a dry paste composition in a vacuum.