140 results about "Endoderm cell" patented technology

Disclosed herein are cell cultures comprising PDX1-positive endoderm cells and methods of producing the same. Also disclosed herein are cell populations comprising substantially purified PDX1-positive endoderm cells as well as methods for enriching, isolating and purifying PDX1-positive endoderm cells from other cell types. Methods of identifying differentiation factors capable of promoting the differentiation of endoderm cells, such as PDX1-positive foregut endoderm cells and PDX1-negative definitive endoderm cells, are also disclosed.

The present invention provides cell populations that are enriched for mesendoderm and mesoderm, and cell populations that are enriched for endoderm. The cell populations of the invention are useful for generating cells for cell replacement therapy.

Disclosed herein are cell cultures comprising expanded definitive endoderm cells as well as methods for expanding definitive endoderm cells in culture.

The present invention provides compositions and methods for the production of differentiated mammalian cells. More particularly, the present invention provides cellular differentiation methods employing culturing the cells on a feeder layer or under feeder-free conditions in cell culture and further contacting the cells with an inhibitor of the PI3-kinase pathway for the generation of differentiated mammalian cells from pluripotent mammalian stem cells. Preferably, the differentiated cell is selected from the group consisting of a mesendodermal cell, a mesodermal cell, and an endodermal cell.

Disclosed herein are cell cultures comprising dorsal and / or ventral PDX1-positive foregut endoderm cells and methods of producing the same. Also disclosed herein are cell populations comprising substantially purified dorsal and / or ventral PDX1-positive foregut endoderm cells as well as methods for enriching, isolating and purifying dorsal and / or ventral PDX1-positive foregut endoderm cells from other cell types. Methods of identifying differentiation factors capable of promoting the differentiation of dorsal and / or ventral PDX1-positive foregut endoderm cells, are also disclosed.

Disclosed herein are cell cultures comprising definitive endoderm cells and methods of producing the same. Also disclosed herein are cell populations comprising substantially purified definitive endoderm cells as well as methods for enriching, isolating and purifying definitive endoderm cells from other cell types.

Disclosed herein are methods of identifying one or more differentiation factors that are useful for differentiating cells in a cell population comprising definitive endoderm cells into cells which are capable of forming tissues and / or organs that are derived from the gut tube.

The present invention provides cell populations that are enriched for mesendoderm and mesoderm, and cell populations that are enriched for endoderm. The cell populations of the invention are useful for generating cells for cell replacement therapy.

Disclosed herein are cell cultures comprising expanded definitive endoderm cells as well as methods for expanding definitive endoderm cells in culture.

The invention relates to methods that allow for the efficient differentiation to form pancreatic endoderm cells from pluripotent stem cells such as human embryonic stem cells and definitive endoderm cells. The invention is directly applicable to the ultimate generation of pancreatic beta cells that could be used as part of a therapy to treat or even cure diabetes. Additionally, the present invention may be used to generate liver endoderm cells from human embryonic stem cells and definite endoderm cells as well. This invention relates to a method for generating definitive endoderm and pancreatic endoderm cells from stem cells, preferably human embryonic stem cells using defined media in the absence of feeder cells. A simply two step procedure to provide pancreatic endoderm cells from embryonic stem cells represents further embodiments of the present invention.

A human immature endocrine cell population and methods for making an immature endocrine cell population are provided. Specifically, immature beta cells and methods for production of immature beta cells are described. Immature beta cells co-express INS and NKX6.1 and are uni-potent and thereby develop into mature beta cells when implanted in vivo. The mature beta cells in vivo are capable of producing insulin in response to glucose stimulation.

Disclosed herein are reagent-cell complexes comprising one or more definitive endoderm cells. Also described herein are compositions for detecting definitive endoderm. Method of enriching, isolating and / or purifying definitive endoderm cells are also disclosed.

This disclosure relates to compositions comprising human preprimitive streak cells and / or human mesendoderm cells as well as methods for their production. Additionally, disclosed herein are methods of identifying factors useful in the further differentiation of preprimitive streak and mesendoderm cell types.

Certain embodiments disclosed herein are directed to a method of producing endoderm cells, such as definitive endoderm cells by exposing stem cells such as embryonic stem cells or induced pluripotent stem (iPS) cells to an effective amount of at least one compound described herein to differentiate the stem cells into the endoderm cells such as definitive endoderm cells. Differentated endoderm cells produced by the methods disclosed herein can be differentiated into pancreatic epithelium, and other endoderm derivatives such as thymus, liver, stomach, intestine and lung. Another aspect of the present invention relates to a method of producing pancreatic progenitor cells, such as Pdx1-positive pancreatic progenitor cells by exposing endoderm cells, such as definitive endoderm cells to an effective amount of at least one compound described herein to differentiate the definitive endoderm cells into Pdx1-positive pancreatic progenitor cells. Kits and compositions comprising Pdx1-positive pancreatic progenitor produced using the methods are also described.

The invention discloses a parenchymal hepatic cell and preparation, identification and application methods thereof. The invention provides the method for preparing the parenchymal hepatic cell. The method comprises the following steps of: (1) culturing a pluripotent stem cell to obtain an endoderm cell; (2) culturing the endoderm cell obtained in the step (1) to obtain an original intestinal canal cell; (3) culturing the original intestinal canal cell obtained in the step (2) to obtain an adult hepatic cell; and (4) culturing the adult hepatic cell obtained in the step (3) to obtain a mature parenchymal hepatic cell, wherein the step (3) is characterized in that the cell obtained in the step (2) is subjected to passage and then transferred to a hepatic cell induction medium I containing fibroblast growth factors (FGF) and bone morphogenetic protein (BMP) for culturing to obtain the adult hepatic cell. The invention also relates to the parenchymal hepatic cell prepared by the method. The parenchymal hepatic cell prepared by the method has higher metabolic activity, high preparation efficiency and a wide application prospect than before.

Disclosed herein are cell cultures comprising PDX1-positive endoderm cells and methods of producing the same. Also disclosed herein are cell populations comprising substantially purified PDX1-positive endoderm cells as well as methods for enriching, isolating and purifying PDX1-positive endoderm cells from other cell types. Methods of identifying differentiation factors capable of promoting the differentiation of endoderm cells, such as PDX1-positive foregut endoderm cells and PDX1-negative definitive endoderm cells, are also disclosed.

Methods for producing hepatocyte and / or cholangiocyte lineage cells from pluripotent stem cells, the method comprising (a) specifying the extended nodal agonist treated induced endodermal cell population to obtain a cell population comprising hepatocyte and / or cholangiocyte progenitors by contacting the extended nodal agonist treated induced endodermal cell population with specification media comprising a FGF agonist and a BMP4 agonist and / or active conjugates and / or fragments thereof; (b) inducing maturation, and optionally further lineage specification and / or expansion of the hepatocyte and / or cholangiocyte progenitors of the cell population to obtain a population comprising hepatocyte lineage cells such as hepatoblasts, hepatocytes and / or cholangiocytes, the inducing maturation step comprising generating aggregates of the cell population. Optionally, the method also comprises activating the cAMP pathway within the aggregates and forming co-aggregates.

The present invention discloses a method for inducing the differentiation of embryonic stem cells (ESC) or induced pluripotent stem cells (iPS cells) into hepatocytes, a method for inducing the differentiation of embryonic stem cells or induced pluripotent stem cells into hepatic endoderm cells, and a method for inducing the differentiation of embryonic stem cells (ESC) or induced pluripotent stem cells into hepatic progenitor cells. The present invention also provides the hepatocytes, hepatic endoderm cells and hepatic progenitor cells obtained by above methods, and the uses of these cells.

The invention provides a method for obtaining pancreatic precursor cells and pancreatic beta cells through differentiation of human multipotential stem cells. In the process of specializing entoderm cells derived from the human multipotential stem cells towards pancreas pedigree cells, the efficiency of differentiating the human multipotential stem cells towards the pancreatic precursor cells canbe improved by stepwise adding a WNT signal channel inhibitor. According to the method, after the efficiency of differentiation towards the pancreatic precursor cells is improved, the efficiency of differentiation of the mature pancreatic beta cells is improved accordingly. The method is suitable for pancreas differentiation of different cell lines, a large quantity of pancreatic beta cells are obtained, strong support is provided for diabetes cell therapy, drug screening, disease models and the like, and the method has a good application prospect.