246 results about "Pancreatic islet cell" patented technology

It is intended to provide a method of forming pancreatic β cells from mesenchymal cells characterized by comprising using mammal-origin mesenchymal cells as starting cells, culturing these cells in the presence of, for example, a pancreatic β cell-forming agent, and selecting and separating the thus obtained pancreatic βcells with the use of a gene expressed specifically in such cells as a selection marker; a remedy for glucose intolerance which comprises pancreatic β cells obtained by the above method as the active ingredient; a pancreatic β cell-forming agent such as a cytokine to be used in the above method; a method of screening a candidate compound promoting the formation of pancreatic β cells from mesenchymal cells; and a pancreatic β cell formation promoter obtained by this screening method.

A method of generating cells capable of secreting insulin is disclosed. The method comprises subjecting mammalian embryonic stem cells to set of culturing conditions suitable for differentiation of at least a portion thereof into cells displaying at least one characteristic associated with a pancreatic islet cell progenitor phenotype, and subjecting such differentiated cells to a set of culturing conditions suitable for formation of surface bound cell clusters including insulin producing cells.

The present invention relates to the phytocannabinoid tetrahydrocannabivarin (THCV) for use in the protection of pancreatic islet cells. Preferably the pancreatic islet cells to be protected are beta cells. More preferably the protection of the pancreatic islet cells maintains insulin production at levels which are able to substantially control or improve control of blood glucose levels in a patient.

The present invention relates to delivery systems. In particular, the present invention provides microporous scaffolds having thereon agents (e.g., extracellular matrix proteins, exendin-4) and biological material (e.g., pancreatic islet cells). In some embodiments, the scaffolds are used for transplanting biological material into a subject. In some embodiments, the scaffolds are used in the treatment of diseases (e.g., type 1 diabetes), and related methods (e.g., diagnostic methods, research methods, drug screening).

Type 1 diabetes mellitus and other conditions relating to inadequate insulin or diminished levels of insulin can be treated by administering a pancreatic islet cell regeneration agent and/or an agent that transforms pancreatic ductal cells to islet cells in combination with administration of an agent that selectively inhibits, blocks, or destroys the autoimmune cells that target pancreatic islet cells.

Methods and compositions are described for the treatment of type I insulin-dependent diabetes mellitus and other conditions using newly identified stem cells that are capable of differentiation into a variety of pancreatic islet cells, including insulin-producing beta cells, as well as hepatocytes. Nestin has been identified as a molecular marker for pancreatic stem cells, while cytokeratin-19 serves as a marker for a distinct class of islet ductal cells. Methods are described whereby nestin-positive stem cells can be isolated from pancreatic islets and cultured to obtain further stem cells or pseudo-islet like structures. Methods for ex vivo differentiation of the pancreatic stem cells are disclosed. Methods are described whereby pancreatic stem cells can be isolated, expanded, and transplanted into a patient in need thereof, either allogeneically, isogeneically or xenogenically, to provide replacement for lost or damaged insulin-secreting cells or other cells.

The present invention discloses a food with low index of blood glucose generation, which has a reasonable prescription combined with a fastness starch, edible fibers and corns, to be made with the screened reasonable dosages with the proper ratio. The present invention not only can satisfy the health and nutrition of people, but also does not increase the level of blood glucose, while the food with low index of blood glucose generation can prolong the absorption of the sugar and adapt to the insulin capacity, thereby controlling the blood glucose of the patient effectively and recovering the glycated haemoglobin to the normal standard, wherein the food with low index of blood glucose generation can decrease the burden on the pancreatic islet cells and improve the function thereof to secrete insulin, relieve the insulin resistance, and protect the B cells, wherein the food with low index of blood glucose generation utilizes the natural food containing high nutrition to compensate the nutritional disorder and alimentary deficiency caused by metabolic disorder of a diabetic, and the food with low index of blood glucose generation without any side effect can effectively control the blood glucose, standardize the blood glucose, blood lipid, blood pressure and body weight, with outstanding effect to get rid of the dependency on hypoglycemic agent, and the cost is low.

The invention relates to a method for preparing full-thickness skin used in toxicity testing by adopting stem cell raft culture, which comprises: 1. preparing and modifying a polymeric dermal scaffold; 2. preparing epidermal stem cells from embryonic stem cells and skin tissues; 3. preparing pancreatic islet cells; 4. preparing a special medium for the full-thickness skin; 5. and constructing the full-thickness skin. By utilizing the characteristics of strong differentiation and proliferation capacity of the epidermal stem cell, the skin morphology, organizational structure and functional activity of the constructed full-thickness skin of the invention can meet the demands of sub-chronic toxicity testing; the synthetic scaffold material has high degree of standardization and small batch-to-batch variation; as a serum free medium is adopted through the skin construction process, the factors influencing tissue construction are reduced, thus providing a foundation for the future use in toxicity testing. The all-thickness skin prepared by the method of the invention is closer to a natural skin, the application of which in the mode of toxicity testing and detection index agrees with practical situation better, thus being able to replace animals to be directly applied to the skin toxicity testing of chemicals, cosmetics, medicines and other health-related products.

A feungreek extract containing the common saponin of feungreek for preventing and treating diabetes and its chronic complications is prepared through extracting with alcohol, macroreticular adsorption, washing for removing impurities, eluting, concentrating the eluting liquid, and drying.

Methods and compositions are provided for lineage predetermination of cellular transplants including through liposome mediated transfection with aqueous protein extracts from populations of differentiated mammalian cells, or cellular fractions thereof, wherein the differentiated mammalian cells are enriched in one or more of adipocytes, chondrocytes, endothelial cells, hepatocytes, cardiomyocytes, smooth muscle cells, skeletal muscle cells, cardiac pacemaker cells, Schwann cells, pancreatic islet cells, hematopoietic cells, myeloblasts, neurons, and osteoblasts.

The present invention, at least in part, relates to the discovery of efficacious delivery of an RNAi agent (in preferred aspects of the invention, an siRNA) to a transplantable tissue. Organ rejection, transplantation-mediated transmission of viral infection, and triggering of apoptosis in transplanted tissues can each be minimized by the methods and compositions of the instant invention. The RNAi agent(s) of the instant invention can be delivered as “naked” molecules, or using liposomal and other modes of delivery, to transplantable tissues. Such delivery can occur via perfusion of the RNAi agent in solution through the vasculature of a whole or partial organ; or tissues including transplantable cells and cell lines may be bathed, injected or otherwise treated with RNAi agents. Preferred transplantable tissues include, for example, pancreas, liver, kidney, heart, lung, and all cells and cell lines derived from such tissues (e.g., pancreatic islet cells that may, e.g., be transplanted as a treated population).

The invention discloses a preparation method of extract of effective part of Clinopodium chinense (Benth.) O. Kuntze for preventing and treating diabetes and an application thereof. The extract of the effective part is prepared from Clinopodium chinense (Benth.) O. Kuntze as a raw material, a concentrate is obtained by pulverizing, ethanol extraction and reduced pressure recovery, the concentrate is extracted by petroleum ether and ethyl acetate, and the obtained ethyl acetate extract is purified by macroporous resin. The extract of the effective part mainly comprises total flavone and terpenoids, and has obvious effects of reducing blood sugar of rats with streptozotocin diabetes, reducing the content of serum cholesterol, protecting the islet cells, inhibiting the activity of alpha-glucosidase, and protecting the vascular endothelial cells. Thus, the extract of the effective part of Clinopodium chinense (Benth.) O. Kuntze has favorable functions for reducing blood sugar, reducing blood fat, and protecting the islet cells and the vascular endothelial cells, and can be used for preventing and treating diabetes, dyslipidemia induced by diabetes and diabetic cardiovascular and cerebrovascular complications.

The present invention relates to a multipotent stem cell, multipotent cell populations, and an enriched multipotent cell population, each found in fetal, neonatal, pediatric, and adult biliary tree tissue and up to 72 hours post mortem (although preferentially, within 10 hours post mortem) and capable of maturing into multiple endodermal tissues that include liver, biliary and pancreatic tissues. The multipotent stem/progenitor cell and cell populations are found in peribiliary glands, and progenitors descending from them are present throughout the biliary tree including in the gallbladder. High numbers of the peribiliary glands are found in the branching locations of the biliary tree such as hilum, common hepatic duct, cystic duct, common duct, common hepato-pancreatic duct and gallbladder. Related multipotent cells, multipotent cell populations and their descendent progenitors are found throughout the biliary tree including in the gall bladder, which does not have peribiliary glands. Compositions comprising same, methods of identifying and isolating same, maintaining same in culture, expanding same in culture and differentiating or lineage restricting the same in vitro or in vivo to hepatic, biliary or pancreatic fates (e.g., as hepatocytes, cholangiocytes, and/or pancreatic islet cells) are also provided. Methods of using the multipotent cells and/or multipotent cell populations are also provided.

Microfluidic systems including a housing configured to receive a cartridge, the cartridge including a plurality of wells for receiving one or more biological cells are described herein. The microfluidic systems include a structure with channels for introducing a medium into the housing and through channels the cartridge. Microfluidic systems including a housing configured to receive a cartridge, the housing including channels for loading one or more biological cells within wells of the cartridge are described herein. Three-dimensional scaffolds, devices, and systems comprising such scaffolds that mimic the in vivo structure, physical properties, and protein composition of extracellular matrix surrounding pancreatic islet cells and adipocytes, and the use of such compositions, devices and systems for, e.g., in vitro drug screening and/or toxicity assays, disease modeling, and therapeutic applications are also described herein.

A composition of matter is provided comprising a devitalized, acellular tissue-derived scaffold seeded with differentiated cells, particularly pancreatic islet cells, wherein the cells can maintain cell-specific function or structure in culture on the scaffold. Methods of generating same and uses thereof are also provided.

The present invention features polypeptides having activity of human neurogenin3 (hNgn3), and nucleic acid encoding such polypeptide. The invention also features use of islet transcription factors such as hNgn3 to facilitate production of pancreatic islet cells from progenitor cells, and to facilitate insulin delivery by production of islet cells so produced.

A biomarker for pancreatic beta-cell mass comprising measuring the levels of CFC1 in the serum of a subject is described. The biomarker provides a noninvasive means for measuring pancreatic beta cell mass that is particularly useful for monitoring the efficacy of treatments for metabolic disorders such as Type I or Type II diabetes, including pancreatic islet cell transplantations.