The present disclosure relates to: an artificial peritoneal tissue comprising a cellular tissue and a mesothelial cell layer that covers the surface of the cellular tissue, wherein the cellular tissue comprises a fibroblast, an extracellular matrix, and a vascular endothelial cell and/or a lymphatic endothelial cell each capable of forming a lumen; and a method for producing the artificial peritoneal tissue.

The systems and methods disclosed herein are generally related to a cell culture system. More particularly, the systems and methods enable the culturing and interconnecting of a plurality of tissue types in a biomimetic environment. By culturing organ specific tissue types within a biomimetic environment and interconnecting each of the organ systems in a physiologically meaningful way, experiments can be conducted on in vitro cells that substantially mimic the responses of in vivo cell populations. In some implementations, the organ systems are fluidically connected with a constant-volume pump.

The invention relates to improved culture methods for expanding epithelial stem cells and obtaining organoids, to culture media involved in said methods, and to uses of said organoids.

The present invention relates to microfluidic fluidic devices, methods and systems as microfluidic kidney on-chips, e.g. human Proximal Tubule-Kidney-Chip, Glomerulus (Kidney)-Chip, Collecting Duct (Kidney)-Chip. Devices, methods and systems are described for drug testing including drug transport and renal clearance. Further, such devices, methods and systems are used for determining drug-drug interactions and their effect upon renal transporter functions. Importantly, they may be used for pre-clinical and clinical drug development for treating kidney diseases and for personalized medicine.

A rapid method for preparing stem cell and physiologically acceptable matrix compositions for use in tissue and organ repair is described. Compared with previous tissue engineering materials, the stem cell-matrix compositions of the present invention do not require long-term incubation or cultivation in vitro prior to use in in vivo applications. The stem cells can be from numerous sources and may be homogeneous, heterogeneous, autologous, and/or allogeneic in the matrix material. The stem cell-matrix compositions provide point of service utility for the practitioner, wherein the stem cells and matrix can be combined not long before use, thereby alleviating costly and lengthy manufacturing procedures. In addition, the stem cells offer unique structural properties to the matrix composition which improves outcome and healing after use. Use of stem cells obtained from muscle affords contractility to the matrix composition.

Disclosed are methods of inducing formation of a gastric cells and/or a gastric tissue, such as in the form of a gastric organoid. The formation of gastric cells and/or tissue may be carried out by the activating and/or inhibiting of one or more signaling pathways within a precursor cell. Also disclosed are methods for using the disclosed gastric cells, gastric tissues, and/or gastric organoids derived from precursor cells.

Methods and materials for making complex, living, vascularized tissues for organ and tissue replacement, especially complex and/or thick, structures, such as liver tissue is provided. Tissue lamina is made in a system comprising an apparatus having (a) a first mold or polymer scaffold, a semi-permeable membrane, and a second mold or polymer scaffold, wherein the semi-permeable membrane is disposed between the first and second molds or polymer scaffolds, wherein the first and second molds or polymer scaffolds have means defining microchannels positioned toward the semi-permeable membrane, wherein the first and second molds or polymer scaffolds are fastened together; and (b) animal cells. Methods for producing complex, three-dimensional tissues or organs from tissue lamina are also provided.

The present invention relates to methods for deriving human hematopoietic progenitors, primitive macrophages, and microglial cells from human pluripotent stem cells. In particular, provided herein are highly efficient and reproducible methods of obtaining human primitive macrophages and microglia from human pluripotent stem cells, where the primitive macrophages and microglia can be suitable for clinically relevant therapeutic applications.

A microfluidic device is contemplated comprising an open-top cavity with structural anchors on the vertical wall surfaces that serve to prevent gel shrinkage-induced delamination, a porous membrane (optionally stretchable) positioned in the middle over a microfluidic channel(s). The device is particularly suited to the growth of cells mimicking dermal layers.

The invention is directed to a method for the in vitro production of arrangements of cell layers in which a first well (2.1) which is closed off from its environment except for a first inlet opening (4.1) and a first outlet opening (5.1) and which has as a first cell substrate (6.1) a first wall (2.1.1) and as a second cell substrate (6.2) an opposite, second wall (2.1.2) which is separated from the first wall (2.1.1) by a first gap, a free surface of a cell substrate (6.1, 6.2) to be colonized with cells is oriented orthogonal to the Earth's gravitational force, and cells (9) are adhered to the cell substrate (6.1, 6.2) to be colonized. The invention is further directed to a method of maintaining the biological functionalities of the cell layers and semi-finished products of a device for the in vitro production and culturing of cell layers and a method for the production of the device.