191 results about "Transforming growth factor beta" patented technology

The invention relates to TGF-β blocking agent-treated HSC compositions and methods comprising the same. The TGF-β blocking agent-treated stem cells are viable for an extended time in culture without replication or differentiation and upon transfer to appropriate conditions are capable of long term hematopoietic reconstitution.

The present invention is based on the seminal discovery that targeted immunomodulatory antobodies and fusion proteins can counter act or reverse immune tolerance of cancer cells. Cancer cells are able to escape elimination by chemotherapeutic agents or tumor-targeted antobodies via specific immunosuppressive mechanisms in the tumor microenvironment and such ability of cancer cells is recognized as immune tolerance. Such immuno-suppressive mechanisms include immunosuppressive cytokines (for example, Transforming growth factor beta (TGF-β)) and regulatory T cells and/or immunosuppressive myeloid dendritic cells (DCs). By conteracting tumor-induced immune tolerance, the present invention provides effective compositions and methods for cancer treatment, optional in combination with another existing cancer treatment. The present invention provides strategies to counteract tumor-induced immune tolerance and enhance the antitumor efficacy of chemotherapy by activating and leveraging T cell-mediated adaptive antitumor immunity against resistant or disseminated cancer cells.

Anti-cancer agents and/or transforming growth factor beta (TGF-beta or TGFβ) antagonists are disclosed, where the agents and/or antagonists include a therapeutically effective amount of a combination of therapeutically active portions of sRII and therapeutically active portions of sRIII or a fusion polypeptide or protein comprising therapeutically active portions of sRII and therapeutically active portions of sRIII. Methods for preventing, treating and/or ameliorating the symptoms of cancer are also disclosed based on administering an effective amount of a composition of this invention.

Specific binding members comprising human antibody antigen binding domains specific for human transforming growth factor beta (TGFβ) bind specifically isoforms TGFβ2 and TGFβ1 or both, preferentially compared with TGFβ3. Specific binding members may be isolated and utilized in the treatment of disease, particularly fibrotic disease and also immune/inflammatory diseases. Therapeutic utility is demonstrated using in vitro and in vivo models. Full sequence and binding information is provided, including epitope sequence information for particularly advantageous specific binding member which binds the active form of TGFβ2, neutralizing its activity, but does not bind the latent member.

Previous methods for culturing human embryonic stem cells have required either fibroblast feeder cells or a medium which has been exposed to fibroblast feeder cells in order to maintain the stem cells in an undifferentiated state. It has now been found that if high levels of fibroblast growth factor, gamma amino butyric acid, pipecholic acid, lithium and transforming growth factor beta are added to the medium in which the stem cells are cultured, the stem cells will remain undifferentiated indefinitely through multiple passages, even without feeder cells or conditioned medium.

The invention relates to a cartilage and bone repair composition comprising a group of human mesenchymal stem cells that are differentiated to the chondro-osteogenic lineage, by means of the amplification thereof with human serum and a transforming growth factor-beta 1 with a molecular domain for binding to collagen I (TGF-β1-DUC) obtained in eukaryotic expression systems, and a biocompatible material which is absorbed by the cells thus treated. The inventive composition can be employed using implants in the area to be repaired or it can be employed directly by injecting the cells in suspension either at the site of the injury or into the systemic circulation for the widespread distribution thereof.

Presented herein are methods of generating a multipotent or immature cell from a mature somatic cell, involving contacting a mature somatic cell with one or more small molecule compounds selected from: a histone deacetylase (HDAC) inhibitor; a glycogen synthase kinase 3 (GSK-3) inhibitor; one or more transforming growth factor-beta receptor (TGF-βR) inhibitors; one or more lysine-specific demethylase 1 (LSD1) inhibitors; a cAMP agonist; a histone lysine methyltransferase (EZH2) inhibitor; and a histone methyltransferase (HMTase) G9a inhibitor; valproic acid. Also provided are methods of generating a multipotent or immature cell from a somatic cell, by driving expression of OCT4, or an OCT4 functional homolog or derivative, under the control of a high expressing promoter. Presented herein are also methods of stem cell expansion, stem cell regeneration and differentiation, which comprise contacting stem cells with one or more small chemical compounds.

Methods and devices are described for the regulation of Transforming Growth actor (TGF)-β1, β2, and/or β3 protein gene expression in bone cells and other tissues via the capacitive coupling or inductive coupling of specific and selective electric fields to the bone cells or other tissues, where the specific and selective electric fields are generated by application of specific and selective electric and electromagnetic signals to electrodes or one or more coils or other field generating device disposed with respect to the bone cells or other tissues so as to facilitate the treatment of diseased or injured bone and other tissues. By gene expression is meant the up-regulation or down-regulation of the process whereby specific portions (genes) of the human genome (DNA) are transcribed into mRNA and subsequently translated into protein. Methods and devices are provided for the targeted treatment of injured or diseased bone and other tissue that include generating specific and selective electric and electromagnetic signals that generate fields in the target tissue optimized for increase of TGF-β1, β2, and/or β3 protein gene expression and exposing bone and other tissue to the fields generated by specific and selective signals so as to regulate TGF-β1, β2, and/or β3 protein gene expression in such tissue. The resulting methods and devices are useful for the targeted treatment of bone fractures, fractures at risk, delayed unions, nonunion of fractures, bone defects, spine fusions, osteonecrosis or avascular necrosis, as an adjunct to other therapies in the treatment of one or all of the above, in the treatment of osteoporosis, and in other conditions in which TGF-β1, β2, and/or β3 protein may be implicated

The invention provides a human skin epidermal cell culture medium and application thereof. The culture medium is prepared by the following steps: mixing a K-SFM (keratinocyte serum-free medium), a DMEM (dulbecco's modified eagle medium) and a F12 culture medium according to the ratio of 2:1:1, and adding a BPE (bovine pituitary extract), an EGF (epidermal growth factor), an SCGF (stem cell growth factor), an FGF (fibroblast growth factor), a TGF-beta (transforming growth factor-beta), a VEGF (vascular endothelial growth factor), CaCl2, glutamine and a double-antibody. The culture medium is free of serum, and can be used for human skin epidermal cell primary culture and subculture. The human skin epidermal cell culture medium can obtain abundant epidermal cells by in-vitro culture by using only a small amount of patient skin tissues. Compared with the traditional epidermal cell culture medium, the human skin epidermal cell culture medium provided by the invention greatly shortens the time required by amplifying the same cell count, and satisfies the demands for clinical therapy.

The invention provides an adult regulatory T cell in-vitro amplification culture medium and an application method thereof. The adult regulatory T cell in-vitro amplification culture medium comprises transform growth factor-beta (1-4 ng/ml), bone morphogenesis protein 4 (8-12 ng/ml), recombinant human interleukin-2 (300-500U/ml), rapamycin (80-100nM/ml), al-trans vitamin A acid (1-4 uM/mL), 4-hydroxyethylpiperazinoethylsulfonic acid (20-30mM/ml), L-glutamine (2mM/ml), 2-mercaptoethanol (40-50uM/ml), 5% human AB type serum, CD3CD28 magnetic bead, penicillin (50U/ml) and streptomycin (50ug/ml). When being used for performing amplification culture and induced differentiation on regulatory T cells, the culture medium can shorten the amplification and differentiation time of the regulatory T cells, and can obtain the high-purity Foxp3CD4+CD25+CD127-regulatory T cells. Therefore, the regulatory T cells can be used in the aspect of clinical treatment of anti-transplantation immunity rejection, autoimmune disease, allergic disease and the like to perform a novel clinical cell therapy.

The invention discloses a separation and cultivation method of human adipose stem cells. The method comprises the following steps: first, digesting a fat suction matter by using a Liberase digestive enzyme solution, neutralizing digestive enzyme after digestion is ended, centrifuging, filtering, and further removing parenchyma cells by using a lymphocyte separation solution so as to obtain the human adipose stem cells; second, cultivating the human adipose stem cells by using a serum-free medium, wherein following components are added in the serum-free medium: a recombinant human epidermal growth factor, a recombinant human basic fibroblast growth factor, a recombinant human transforming growth factor-beta, a recombinant human platelet-derived growth factor-BB, a recombinant human stem cell factor, reduced glutathione, coenzyme A, biotin, MEM vitamin solution, MEM amino acid solution, MEM non-essential amino acid solution, a GlutaMAX additive, insulin-transferrin-selenium solution andgentamicin. The method can remarkably increase the yield of adipose stem cells and improve the activity of the adipose stem cells, so as to obtain more adipose stem cells with proliferation ability.

The invention discloses the application of naringenin and aurantiin as the inhibitor of the signal passage of transforming growth factor-Beta1, in particular the application to the treatment or prevention of fibrosis and tumors.

The invention discloses a high-efficiency non-integrated human iPSC induction platform which comprises a composition, wherein the composition is used for inducing a human cell into iPSC, and the composition comprises a previous inducer and a later inducer; the previous inducer comprises the following active components: a transforming growth factor beta inhibitor, a glycogen synthetase kinase 3 inhibitor, a cAMP agonist, an S-adenosyl homocysteine hydrolase inhibitor and a p21 activated kinase inhibitor; and the later inducer comprises the following active components: the glycogen synthetase kinase 3 inhibitor, a selective ATP noncompetitive MEK inhibitor and the S-adenosyl homocysteine hydrolase inhibitor. The high-efficiency non-integrated human iPSC induction platform disclosed by the invention achieves the previous induction efficiency of the iPSC of 6.4% under the action of a previous inducer composition, can achieve the induction of a full culture of 20.8% through later induction culture or be used for totally further inducing a previous inductor clone into a human iPSC clone approaching to ESC and is far higher than the prior art in induction efficiency; in addition, the obtained iPSC is high in maturity, free of being inserted with an exogenous gene, is more approaching to the ESC in cell morphology and property and has the advantages of good stability and great high application value.

The invention provides a liquid protein chip kit for detecting a liver fibrosis degree. In the liquid protein chip kit, coupling antibody microspheres comprise 1, fluorescent microspheres coupling with procollagen peptide III and/or a metalloprotease tissue inhibitor factor-1 capture antibody, 2, one or more of fluorescent microspheres coupling with collagen peptide IV, fibronectin, a transforming growth factor-beta 1, a platelet-derived growth factor, a tumor necrosis factor alpha capture antibody, and an angiotensin II capture antibody, and 3, fluorescent microspheres coupling with a serum hyaluronic acid capture antibody and/or a laminin capture antibody. The liquid protein chip kit can realize combined detection of a plurality of liver fibrosis-related markers for reflection of different liver fibrosis stages, can shorten detection time to more than ten minutes from a few hours, can finish detection of a plurality of markers only by 1 microliter of a serum sample, can be operated simply and has a low diagnosis cost.

The present invention discloses a feeder-layer-free human pluripotency stem cell culture medium, which contains L-ascorbate-2 magnesium phosphate, sodium selenite, recombinant human insulin, human apotransferrin, basic fibroblast growth factor, transforming growth factor beta 1, heparin lithium and/or heparin sodium, a DMEM/F-12 base culture medium and an osmotic pressure regulator. According to the present invention, with the culture medium, when the hiPSC culture is performed in low density and normal density, the proliferation rate is high, and the cell morphology and the pluripotency are well maintained; the use of the expensive heparitin sulfate is not required so as to substantially reduce the cost; and almost all of the hiPSCs maintaining cultures at the current stage can be met, and various small molecule compounds are added to perform induction reprogramming culture (removal of TGFB1 and DM), such the culture medium is suitable for extensive researches of various basic scientific researches and clinical scientific research experiments.

The invention discloses a culture method of vascular endothelial progenitor cells, which comprises the following steps: 1) inducing differentiation of multipotent stem cells in a culture medium A to form mesendoderm precursor cells; and 2) inducing differentiation of the mesendoderm precursor cells in a culture medium B to form the vascular endothelial progenitor cells. The culture medium A contains a DMEM (dulbecco's modified eagle medium) culture medium, an F12 culture medium, sodium selenate, sodium bicarbonate, vitamin C, insulin, activin A, a bone formation protein 4 and a glycogen synthetase kinase-3 inhibitor. The culture medium B contains a DMEM culture medium, an F12 culture medium, vitamin C, insulin, a vascular endothelial growth factor and a transforming growth factor beta signal pathway inhibitor. The culture media used in the culture method do not contain any animal-derived component, and can provide sufficient nutrient substances and stable living environments for the cultured cells, thereby efficiently inducing the differentiation of the human multipotent stem cells to form the vascular-grid vascular endothelial progenitor cells which are highly similar to the human cord vessel endothelial cells.

Provided are methods and compositions from reprogramming human glial cells into human neurons. The reprogramming is achieved using combinations of compounds that can modify signaling via Transforming growth factor beta (TGF-beta), Bone morphogenetic protein (BMP), glycogen synthase kinase 3 (GSK-3), and gamma-secretase/Notch pathways. The reprogramming is demonstrated using groups of three or four compounds that are chosen from the group thiazovivin, LDN193189, SB431542, TTNPB, CHIR99021, DAPT, VPA, SAG, purmorphamine. Reprogramming is demonstrated using the group of LDN193189/CHIR99021/DAPT, the group of B431542/CHIR99021/DAPT, the group of LDN193189/DAPT/SB431542, the group of LDN 193189/CHIR99021/SB431542, a three drug combination of SB431542/CHIR99021/DAPT. Reprogramming using functional analogs of the compounds is also provided, as are pharmaceutical formulations that contain the drug combinations.

The invention discloses a vascular endothelial cell culture method. The method comprises the following steps: 1) differentiating pluripotent stem cells into mesendoderm precursor cells in a culture medium A; 2) differentiating the mesendoderm precursor cells into progenitor cells of vascular endothelial cells in a culture medium B; 3) differentiating the progenitor cells of the vascular endothelial cells into the vascular endothelial cells in a culture medium C. The culture medium A contains a DMEM, an F12 culture medium, sodium selenate, sodium bicarbonate, vitamin C, insulin, an activin A , bone morphogenetic protein-4 and a glycogen synthase kinase-3 inhibitor; the culture medium B contains a DMEM, an F12 culture medium, sodium selenate, sodium bicarbonate, vitamin C, insulin, a vascular endothelial growth factor and a transforming growth factor beta signaling pathway inhibitor; the culture medium C contains a DMEM, an F12 culture medium, sodium selenate, sodium bicarbonate, vitamin C, insulin, a vascular endothelial growth factor, an epidermal growth factor and a fibroblast growth factor. According to the method, the pluripotent stem cells can be differentiated into the vascular endothelial cells.