427 results about "Beta cell" patented technology

Markers for mature β-cells and methods of using these markers are disclosed.

Pharmaceutical compositions and methods for using are provided for restoring β-cell mass and function in a mammal in need thereof. The pharmaceutical compositions have a biological response modifier and a β-cell growth factor in admixture with a pharmaceutically acceptable carrier, adjuvant or vehicle.

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.

Provided are methods for determining concurrently with a simple, minimally invasive test, the adequacy of pancreatic beta-cell compensation and/or the presence of tissue insulin resistance in a subject human or an experimental animal. The methods allow for the determination of a subject's or experimental animal's susceptibility to developing type 2 diabetes mellitus (DM2) or to progression to more advanced forms of DM2. Among other uses, the methods allow for diagnostic classification of subjects for decisions regarding therapeutic interventions, clinical differentiation between type 1 DM and DM2, clinical monitoring of treatments intended to reduce risk of developing DM2 in non-diabetic subjects, clinical monitoring of agents intended to improve existing DM2 and to prevent progression of DM2, clinical development and testing of new compounds, candidate agents, or candidate therapies for preventing progression to DM2 or disease progression in existing DM2, and preclinical screening of candidate agents or candidate therapies in experimental animals to identify and characterize agents having insulin-sensitizing properties, pancreatic stimulatory or regenerative properties or other desirable actions.

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.

Flavonoids, especially luteolin, are shown to be effective against insulin dependent (Type I) and insulin independent (Type II) diabetes mellitus. It is demonstrated that luteolin works in mammals by binding and blocking the K_v1.3 potassium channel of T-cell and Beta cells. Antidiabetic and anti-autoimmune compounds can be selected by measuring their ability to bind to and block the K_v1.3 channel.

Disclosed is a method for obtaining glucose-regulated expression of active insulin in the cells of a mammalian subject. The method involves delivering into the subject a genetic construct comprising a coding sequence for a human proinsulin operably connected a promoter functional in the host cells. The construct includes a glucose responsive regulatory module having at least one glucose inducible regulatory element comprising a pair of CACGTG motifs linked by a five base nucleotide sequence, which confers glucose inducible expression of the proinsulin coding sequence. To ensure proper processing of the proinsulin to active insulin, the coding sequence was modified to direct the synthesis of a mutant proinsulin polypeptide having amino acid sequences that can be cleaved to mature insulin in suitable host cells, such as hepatocytes.

The present invention provides a method of stimulating growth of a pancreatic islet beta cell and/or enhancing glucose stimulated insulin secretion of a pancreatic islet beta cell, comprising delivering to the cell an exogenous nucleotide sequence encoding Nkx6.1 transcription factor.

Disclosed herein are methods for generating SC-β cells using chemically defined, completely serum free media, and isolated populations of SC-β cells for use in various applications, such as cell therapy.

The invention relates to a probiotic composition, and discloses a probiotic composition beneficial for a glycolipid metabolic function and a preparation and application of the composition. The probiotic composition comprises some of the following nine probiotics: bifidobacterium longum, bifidobacterium breve, lactobacillus gasseri, lactobacillus rhamnosus, lactobacillus salivarius, lactobacillus crispatus, lactobacillus plantarum, lactobacillus fermentum and lactobacillus casei. Different strains in the probiotic composition cooperate with each other, so that the probiotic composition has thefunction of adjusting glycolipid metabolism, and has certain effect on serum total cholesterol, triglycerides, insulin beta-cell functions and diabetes mellitus improvement.

The methods include selectively reducing or expanding T cells according to the antigenic specificity of the T cells using biocompatible bioabsorbable nanospheres. Therefore, the present invention can be used to reduce or eliminate pathogenic T cells that recognize autoantigens, such as beta cell specific T cells. As such, the present invention can be used to prevent, treat or ameliorate autoimmune diseases such as IDDM. Furthermore, the present invention can be used to expand desirable T cells, such as anti-pathogenic T cells to prevent, treat and/or ameliorate autoimmune diseases.

Disclosed herein are methods for generating SC-β cells, and isolated populations of SC-β cells for use in various applications, such as cell therapy.

Disclosed herein are methods for generating SC-β cells, and isolated populations of SC-β cells for use in various applications, such as cell therapy.

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.

Type 1 diabetes mellitus is characterized by loss of pancreatic insulin-producing beta cells, resulting in insulin deficiency. The usual cause of this beta cell loss is autoimmune destruction. Coxsackie virus has been detected in human pancreatic beta cells and causes insulitis. This non-destructive islet inflammation does not itself cause diabetes, but this disease will occur if viral infection is followed by a separate autoimmune response. The insulitis is mediated mainly by natural killer cells. Islets from coxsackie virus positive samples displayed reduced insulin secretion in response to glucose and other secretagogues. Virus extracted from positive islets was able to infect beta cells from human islets of non-diabetic donors, causing viral inclusions and signs of pyknosis.

Production of beta-cells from stem cells from pluripotent stem cells have always been significantly lacking in at least one of the following properties: 1) functional properties related to insulin-production and glucose signaling response, 2) mature phenotype such as biochemical markers or cell structures, 3) efficiency in production of differentiated cells. Described herein is multistep differentiation protocol which substantially overcomes all of the existing limitations. Pluripotent stem cells, including induced pluripotent stem cells (iPSCs), and embryonic stem cells (ESCs) can be differentiated using an embryoid body (EB) formation step, followed by B maturation via endothelial cells (EC) co-culturing and incubation with a sequential series of bone morphogenic protein (BMP)-related growth factor cocktails. The resulting cells displayed functional properties, including insulin-production and glucose signaling response, and mature phenotype of C-peptide expression.