40 results about "Induced stem cells" patented technology

Provided are a reagent combination or a kit for constructing an embryoid and the use thereof. The reagent combination or the kit can be used for inducing a stem cell to produce a blastocyst-like lineage precursor cell, a blastocyst-like cell and / or an embryoid, which are based on small-molecule induction and independent of transgenes, and have a single cell source. The produced blastocyst-like lineage precursor cell and blastocyst-like cell have a full blastocyst lineage, and are seed cells having balanced developmental competence and totipotency, which solves the problem of unbalanced cell maturation in the prior art. The produced embryoid is highly similar to natural embryos in terms of morphological characteristics and transcriptomic characteristics, has the capability of highly reproducing post-implantation embryonic development and / or gastrulation, which is beneficial for research on embryonic development in vitro. The method for inducing the stem cell to produce the blastocyst-like lineage precursor cell, the blastocyst-like cell and / or the embryoid by using the reagent combination or the kit is simple, and has high applicability and high embryoid construction efficiency.

Described herein are methods of inducing proliferation of PRX1 expressing stem cells stem cells in a subject in need thereof, the method can include administering an effective amount of niclosamide, or a pharmaceutically acceptable salt, prodrug, or derivative thereof.

The application discloses a metformin-induced stem cell-derived extracellular matrix material and a preparation method and application thereof, and relates to the technical field of biological materials. The preparation method comprises the following steps: inoculating mesenchymal stem cells on a pretreated culture carrier, and using a culture system containing metformin to induce and treat the mesenchymal stem cells; adding ascorbic acid to induce and culture extracellular matrix secretion; carrying out decellularization treatment and nuclease treatment on the metformin-induced extracellular matrix; collecting the metformin-induced stem cell-derived extracellular matrix, mixing the metformin-induced stem cell-derived extracellular matrix with an aqueous medium, and enriching and forming an extracellular matrix precipitate through centrifugal treatment; and sequentially carrying out freezing treatment and thawing treatment on the extracellular matrix precipitate to obtain the metformin-induced stem cell-derived extracellular matrix material. The metformin is used to induce the mesenchymal stem cells to secrete an engineered extracellular matrix, and the engineered extracellular matrix is used to promote the repair of bone defects, skeletal muscle injuries and musculoskeletal joint defects in a diabetic environment.

Provided are a preparation method for and a use of a dorsal root ganglion organoid. In one aspect, a preparation method for a dorsal root ganglion organoid is provided, which comprises: (1) inducing stem cells in a neural stem cell induction medium, to obtain neural stem cells; (2) inducing the neural stem cells in a neural crest cell induction medium, to obtain neural crest cells; (3) inducing the neural crest cells in a sensory neural progenitor cell induction medium, to obtain sensory neural progenitor cells; (4) inducing the sensory neural progenitor cells in an organoid induction medium, to obtain a dorsal root ganglion organoid. In addition, a use of the dorsal root ganglion organoid obtained by said method is also provided, for example, for drug screening or disease research.

The present disclosure relates to apoptosis-induced stem cells, a method for producing the same, and a pharmaceutical composition for the prevention or treatment of an inflammatory disease or a renal disease, including the same. Cells according to an aspect and a composition including the cells as an active ingredient have an increased IL-10 expression level without including a cryoprotectant, and thus can be effectively used for the prevention or treatment of an inflammatory disease or a renal disease.

The invention relates to the technical field of biological medicine, in particular to an exosome medicine preparation for treating knee osteoarthritis and a preparation method thereof, and the exosome medicine preparation is characterized in that an exosome is derived from mesenchymal stem cells subjected to three-dimensional culture in a first hydrogel matrix containing sodium alginate and hyaluronic acid; flurbiprofen or a pharmaceutically acceptable salt or ester thereof; and a pharmaceutically acceptable second gel matrix. Sodium alginate and hyaluronic acid composite hydrogel serves as a three-dimensional culture carrier of mesenchymal stem cells, a joint microenvironment is simulated to induce stem cells to secrete high-activity exosomes rich in key functional nucleic acid and active protein, meanwhile, the exosomes are scientifically compounded with flurbiprofen, and synergistic mechanisms of anti-inflammatory analgesia and tissue repair are achieved; and a local slow-release delivery system is constructed through the second gel matrix, so that long-acting stable release of active ingredients is realized, the systemic side effect of the medicine is reduced, the bioavailability of the exosome is improved, and the problems of obvious side effect, limited repair effect and the like in the prior art are solved.

This invention provides a calcium phosphate-polycaprolactone composite scaffold, its preparation method, and its applications. The raw materials for preparing the calcium phosphate-polycaprolactone composite include polycaprolactone, β-tricalcium phosphate, and hydroxyapatite. The resulting composite scaffold possesses functions of promoting immunity and regulating bone regeneration. The preparation method of this invention involves first forming a hydroxyapatite / polycaprolactone composite film, which is then broken down and recombined with β-tricalcium phosphate to form a composite solution. The resulting 3D-printed composite scaffold not only possesses good mechanical strength and biocompatibility but also induces stem cell proliferation and osteogenic differentiation, and induces macrophage regeneration and polarization. It can be used to regulate immune cell responses, induce a bone immune microenvironment conducive to bone formation, thereby enhancing bone regeneration, and can be used for the repair and regeneration of tissue defects.

The present disclosure relates to apoptosis-induced stem cells, a method for producing the same, and a pharmaceutical composition for the prevention or treatment of an inflammatory disease or a renal disease, including the same. Cells according to an aspect and a composition including the cells as an active ingredient have an increased IL-10 expression level without including a cryoprotectant, and thus can be effectively used for the prevention or treatment of an inflammatory disease or a renal disease.

The presently disclosed subject matter provides for in vitro methods of inducing differentiation of stem cells into hindbrain progenitor cells, enteric neural crest lineage cells, as well as differentiated hindbrain lineage or enteric neural crest lineage cells obtained by such methods. The presently disclosed subject matter also provides for uses of such cells for preventing and / or treating enteric nervous system disorders (e.g, Hirschsprung's disease), and for screening compounds suitable for preventing and / or treating enteric nervous system disorders (e.g., Hirschsprung's disease).

The invention belongs to the technical field of medical dressings, and relates to a DNA hydrogel dressing with a skin-like structure and function as well as a preparation method and application of the DNA hydrogel dressing. The dressing is structurally characterized in that a skin-like three-layer structure, namely an epidermal layer, a corium layer and a subcutaneous tissue layer, is constructed by regulating and controlling the cross-linking degree of chain segments and combining a directional freezing technology, and an extracellular matrix microenvironment is provided for physiological activities of cells. In function, an aptamer sequence with a specific function is introduced, and stem cells are induced to directionally differentiate into cells required by tissue repair; the subcutaneous tissue-like layer is loaded with resveratrol, and fascia is activated to induce regeneration of skin appendages; in view of the fact that chronic ulcerative wounds are easily attacked by bacteria, the antibacterial peptide and a functional DNA sequence of targeted bacteria form an antibacterial peptide-DNA composite chain segment through a click reaction, and the dressing is endowed with targeted antibacterial performance. The prepared dressing has a skin-imitating three-dimensional structure and performance, can guide skin appendages such as regeneration of hair follicles and sweat glands, and can be widely applied to repair treatment of chronic wounds.

The present application provides the use of leukotrienes in inducing stem cells to differentiate into hematopoietic stem / progenitor cells and the application thereof. According to specific embodiments of the present application, the addition of appropriate amounts of leukotrienes during the process of inducing stem cells to differentiate into hematopoietic stem / progenitor cells can significantly improve the differentiation efficiency of the stem cells into hematopoietic stem / progenitor cells, and significantly increase the number of erythroid cells, megakaryocytic cells, granulocytic cells and mononuclear cells obtained after the differentiation of the stem cells through hematopoietic stem / progenitor cells.

This invention provides a stem cell preparation for skin repair and its application, belonging to the field of biomedical technology. The stem cell preparation is obtained by inducing stem cells in a composite culture medium containing sodium butyrate, L-carnosine, and quercetin, followed by short-term pulsed hypoxia treatment, ultrasonic disruption, deep freeze-thaw rehydration, and vacuum freeze-drying to obtain a lyophilized stem cell powder. Experimental results show that the stem cell preparation of this invention significantly promotes the proliferation of human skin fibroblasts and significantly promotes the migration of human keratinocytes. In a mouse full-thickness skin defect model, local application after reconstitution in PBS buffer containing 0.1% sodium hyaluronate (concentration ≥100 μg / mL) significantly accelerates wound closure. In summary, the preparation of this invention exhibits high activity, strong stability, and broad prospects for clinical translation.

Provided are a culture medium composition for inducing differentiation from stem cells to platelet precursor cells and a method of inducing differentiation from stem cells to platelet precursor cells in the presence of said culture medium composition. According to one aspect, the culture medium composition for inducing differentiation from stem cells to platelet precursor cells can enhance the efficiency of differentiation into platelet precursor cells and has the effect of differentiating into platelet precursor cells without genetic manipulation.

The present invention relates to a composition for inducing the differentiation of stem cells into astrocytes, which contains CPI-455. It is expected that using the composition of the present invention will not only induce differentiation into astrocytes without using existing stem cell differentiation promoters, but will also enable the effective treatment of neurodegenerative diseases using the differentiated astrocytes.

The invention provides a method for amplifying norovirus by using an intestinal organ gas-liquid interaction model, and relates to the technical field of biological medicines. Comprising the following steps: preparing a culture medium, and inducing stem cell differentiation according to the prepared culture medium to form intestinal organs; placing the differentiated intestinal organs in Transwell for continuous culture, promoting maturation of the intestinal organs under the condition of a culture medium, and forming an intestinal organ gas-liquid interaction model; extracting the norovirus, infecting the intestinal organ gas-liquid interaction model by using the norovirus, and then detecting the amplification multiple of the norovirus. The intestinal organ gas-liquid interaction model prepared by the invention is similar to human intestinal cells in composition, can realize infection and amplification of the norovirus in vitro, can be repeatedly obtained in large quantities, avoids clinical risks and ethical constraints, and is suitable for research of norovirus in-vitro infection mechanism and drug screening.

This application relates to a method for inducing stem cells to differentiate into retinal pigment epithelial cells (RPE), comprising the following steps: culturing the pluripotent stem cells in a first culture medium before the pluripotent stem cells exhibit cell state decline after cell culture, wherein the first culture medium comprises DMEM medium, serum, β-mercaptoethanol, non-essential amino acids (NEAA), and L-glutamine. The method described in this application can significantly improve the efficiency of differentiation into RPE.

A method for differentiating non-human primate iPSCs into neurons may include providing a modified vector containing a piggyBac vector backbone, the modified vector expressing differentiation factor genes; treating the non-human primate iPSCs in a culture medium with the modified vector; replacing the culture medium with a second culture medium comprising BDNF, NT-3, and laminin; adding a culture medium supplemented with L-glutamine or an L-glutamine substitute, BDNF, and NT3; and generating neuronal lineage cells.

A method of differentiating nonhuman primate induced pluripotent stem cells (iPSCs) to oligodendrocytes is provided. The method may include providing a modified vector comprising a piggyBac vector backbone that expresses one or more differentiation factor genes, including SOX10, OLIG2, and NKX6-2. The piggyBac vector backbone may comprise one or more terminal inverted repeats and one or more transposase recognition sites configured to interact with a piggyBac transposase to mediate genomic integration at TTAA or noncanonical target sequences. The vector may further include a selectable marker and a promoter for regulated expression. The modified vector may be introduced into nonhuman primate iPSCs, for example from Macaca fascicularis, by electroporation and used in a feeder-free differentiation workflow. The resulting differentiated cells may be identified by expression of oligodendrocyte-associated markers including O4, O1, PDGFRA, MOG, GALC, CNPase, and myelin basic protein (MBP).

The present invention relates to the field of biotechnology, and provides a kit and method for inducing stem cells to differentiate into natural killer (NK) cells, and a use of the kit. In the kit, a culture medium having clear chemical components, chemical small molecules, and cytokines are used. The kit does not involve substances such as serum which are easy to cause unstable factors such as batch differences, is cheaper in price than a known commercial differentiation culture medium, and reduces the differentiation period. The present invention further provides a pharmaceutical composition and method for treating glioblastoma (GBM), particularly drug-resistant GBM, and a use of the pharmaceutical composition. Specifically, the present invention relates to treatment for GBM by combining immune cells and a chemotherapy drug. More specifically, the present invention relates to synergistic treatment for TMZ drug-resistant GBM by combining NK cells and TMZ.

This application relates to a method for inducing stem cells to differentiate into retinal pigment epithelial cells (RPE), comprising the following steps: culturing the pluripotent stem cells in a first culture medium before the pluripotent stem cells exhibit cell state decline after cell culture, wherein the first culture medium comprises DMEM medium, serum, β-mercaptoethanol, non-essential amino acids (NEAA), and L-glutamine. The method described in this application can significantly improve the efficiency of differentiation into RPE.

The current invention provides for methods and systems of inducing cell cycle exit and terminal differentiation in stem cells undergoing differentiation into various mature cell types in particular pancreatic endocrine cells. The current invention also provides for methods and systems of inducing differentiation of pancreatic endocrine cells from stem cells. The invention also provides for the cells produced by the methods that are suitable for transplantation or grafting into a subject for the prevention and / or treatment of disease, and useful for basic research and drug testing.

The present invention relates to stem cells derived from a multi-layered cellular structure or blastocyst structure, compositions comprising the same, and methods for obtaining the same.

Provided are a kit for inducing differentiation of stem cells into dopaminergic neural precursor cells and / or dopamine neurons, and a use thereof. The kit uses chemically defined culture media, chemical small molecules and cytokines, and does not involve substances such as animal-derived components which easily cause unstable factors such as batch-to-batch variation. Moreover, the differentiation period is shortened, and the kit can be used in clinical practice.

An aspect provides a biodegradable polymer scaffold for kidney regeneration, including basic ceramic particles, an extracellular matrix, zinc particles, a kidney regeneration-inducing material, and a biodegradable polymer. A biodegradable polymer scaffold for kidney regeneration, according to an aspect, includes a kidney regeneration-inducing material and / or extracellular vesicles that secrete a stem cell recruitment-inducing factor, thereby inducing stem cells to a damaged tissue site and enhancing kidney regenerative capacity, and thus can effectively induce the regeneration of kidney tissue. Therefore, the biodegradable polymer scaffold can contribute to the medical device industry, including the bioimplant market.

The invention relates to a preparation method and application of dorsal root ganglion organoid. On one hand, the invention provides the preparation method of the dorsal root ganglion organoid, which comprises the following steps: (1) inducing stem cells in a neural stem cell induction culture medium to obtain neural stem cells; (2) inducing the neural stem cells in a neural crest cell induction culture medium to obtain neural crest cells; (3) inducing the neural crest cells in a sensory nerve progenitor cell induction culture medium to obtain sensory nerve progenitor cells; and (4) inducing the sensory nerve progenitor cells in the organoid induction culture medium to obtain the dorsal root ganglion organoid. Moreover, the invention also provides application of the dorsal root ganglion organoid obtained by the method, for example, the dorsal root ganglion organoid is used for drug screening or disease research.

The invention relates to the technical field of stem cells, in particular to a preparation method of a stem cell lysate for inducing hair follicle regeneration, and the method comprises the following steps: inducing and culturing human adipose-derived mesenchymal stem cells in an induction culture medium containing a Wnt signaling pathway activator and a hair follicle regulator to obtain stem cells pre-induced by a hair follicle lineage; performing lysis treatment based on the pre-induced stem cells to obtain a lysis product, performing centrifugal treatment on the lysis product, and collecting supernate after centrifugal treatment; carrying out incubation binding treatment on the supernate and copper peptide to enable the copper peptide to be bound to components in the supernate, so as to obtain the stem cell lysate capable of inducing hair follicle regeneration. The technical problems that the targeting property of the stem cell lysate is insufficient, and active ingredients are damaged in the preparation process are solved.

The disclosure relates, in some aspects, to methods and compositions for production of immunogenic compositions. In some embodiments, the disclosure provides T cells which have been treated ex vivo with one or more oligonucleotide agents capable of controlling and / or reducing the differentiation of the T cell, for example through PD-1 silencing induced by chemically modified double stranded nucleic acid molecules. In some embodiments, compositions and methods described by the disclosure are useful as immunogenic modulators for treating cancer, such as melanoma.

The invention relates to the field of biomedical engineering and regenerative medicine, in particular to a method for activating the homing potential of bone joints of stem cells induced by small molecules and application, and the homing potential of the stem cells is remarkably enhanced by adopting the synergistic effect of three core factors, namely SDF-1alpha, TGF-beta and vitamin D. Through induction treatment, the expression of stem cell surface homing related molecules CXCR4 and Integrin beta is remarkably improved, so that the directed migration and repair capability of the stem cell surface homing related molecules CXCR4 and Integrin beta to a damaged bone joint area is enhanced. In-vitro and animal experiment results show that the activated stem cells show a remarkable repairing effect in histological, functional recovery and iconography detection, the knee joint motion range and the cartilage thickness are remarkably improved, and the homing rate reaches 40%-60%. The method is simple and convenient to operate, does not need gene modification, provides a new cell treatment scheme for osteoarticular diseases, and has a wide clinical application prospect.

To provide a novel method for obtaining brown adipose tissue by differentiating stem cells. [Solution] A method for producing brown adipose tissue, comprising a culture step of culturing a hydrogel containing stem cells and a cationic polymer in a medium containing 3,3',5-triiodo-L-thyronine and insulin, thereby inducing differentiation of the stem cells into brown adipose tissue.