The invention provides tissue engineering compositions and methods wherein three-dimensional matrices for growing cells are prepared for in vitro and in vivo use. The matrices comprise biodegradable polymer fibers capable of the controlled delivery of therapeutic agents. The spatial and temporal distribution of released therapeutic agents is controlled by use of defined nonhomogeneous patterns of therapeutic agents in the matrices.

L'invention fournit des compositions et des méthodes en technologie de tissu où des matrices tridimensionnelles pour les cellules croissantes sont préparées pour l'usage in vitro et in vivo. Les matrices comportent les fibres biodégradables de polymère capables de la livraison commandée des agents thérapeutiques. La distribution spatiale et temporelle des agents thérapeutiques libérés est commandée au moyen des modèles nonhomogeneous définis des agents thérapeutiques dans les matrices.

 
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< Implantable substrates for the healing and protection of connecting tissue, preferably cartilage

< Biodegradable cross-linkers having a polyacid connected to reactive groups for cross-linking polymer filaments

> Compositions for receptor/liposome mediated transfection and methods of using same

> Tissue equivalent approach to a tissue-engineered cardiovascular valve

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