Provided herein is technology relating to engineered tissues and particularly, but not exclusively, to methods, compositions, and systems for engineering a biosynthetic vascular network.

Described herein are methods of recellularizing an organ or tissue matrix.

A composition including, (a) a mineral particle, (b) endothelial cells and mesenchymal cells, and (3) hyaluronic acid, is provided. Moreover, a kit which includes: a syringe, a mineral particle covered with endothelial cells and mesenchymal cells organized in 2 or more cell layers attached to the mineral particle, and hyaluronic acid, is also provided. Last, a method for filling a gap in a bone of a subject in need thereof, including contacting the gap with a composition of: (a) a mineral particle, (b) endothelial cells and mesenchymal cells, and (3) hyaluronic acid is provided.

Various aspects of the present disclosure are directed toward devices, methods, and systems that include a reinforced biopolymer including a synthetic support membrane and a biopolymer. The reinforced biopolymer may have a measured optical transparency of at least 85%, a thickness of about 100 μm or less, and a toughness of at least 30 KJ/m.sup.3.

The invention relates to a process for obtaining a skin substitute, comprising the following steps: a) mixing fibroblasts, endothelial cells and hydrogel of exclusively biological origin; b) incubating the mixture obtained in step a) for a sufficient time and under suitable conditions to obtain a pre-vascularized dermis; c) adding keratinocytes to the pre-vascularized dermis of step b) to obtain a skin substitute; wherein said fibroblasts, endothelial cells and keratinocytes were obtained from pluripotent stem cells.

Disclosed herein are compositions and methods to decellularize an isolated organ or portion thereof. Also disclosed herein are compositions and methods for treatment of disease utilizing a decellularized or recellularized organ. Also disclosed herein are methods of improving decellularization and/or recellularization of an isolated organ or portion thereof.

This invention discloses an implant for regeneration of tissue with lesions, comprising a mixture with different types of cells, particularly, mesenchymal stem cells (MSC), endothelial cells, and specific functional cells according to the nature and function of the tissue, included into the biocompatible polymeric matrix, where the cells may or may not be organized in a specific way. This innovation also discloses a method to manufacture the implant. The implant of the present invention is useful for replacement or regeneration of animal and human tissues.

A platform for creating engineered tissues includes a vascular tube that defines a vascular diameter and is configured to receive vascular system seed cells, a non vascular tube that defines a non-vascular tube diameter and is configured to receive organ system seed cells, and a barrier formed between the vascular tube and the non vascular tube.

Compositions and methods for generating insulin-producing beta cells from pluripotent stem cells are provided. The compositions and methods of the present invention involve stepwise differentiation while the differentiating cells are cultured on a lung tissue-derived acellular scaffold.

Provided herein are methods which alter the mechanical and biological properties of polymeric materials. Also provided are compositions comprising the polymeric materials having said properties.