58 results about "Cardiac fibroblast" patented technology

The present invention generally relates to methods and compositions to generate a secondary iPS (2iPS) cell to produce somatic cells of a rare differentiation cell type fate. In some embodiments, the method relates to an increase in efficiency of differentiation and production of high yields of somatic cells of a rare differentiation cell type fate produced from secondary iPS (2iPS) cells as compared to their differentiation from other pluripotent stem cell sources such as ES cells or primary iPS cells. In some embodiments, the present invention relates to compositions, methods and systems for reprogramming a first somatic cell into a primary iPS cell, where the primary iPS cell is then differentiated along a selected linage to produce a second somatic cell, which is then reprogrammed to a secondary iPS cell (2iPS) cell. The 2iPS cell has a high efficiency of differentiating into a cell of the same cell type as the second somatic cell, e.g., a somatic cells of a rare differentiation cell type fate such as but not limited to a ventricular cardiomyocyte, a pancreatic β-cell or a hepatic cell. In some embodiments, the first somatic cell is a fibroblast, or a cardiac cell, but is not limited to cardiac fibroblast cells. In some embodiments, the present invention relates to compositions, methods and systems to produce ventricular cardiomyocytes from secondary induced pluripotent stem cells (iPSC), where the iPSC are themselves generated from ventricular cardiomyocytes. The secondary iPS (2iPS) cell generated from ventricular cardiomyocytes have a higher cardiomyogenic potential and high cardiomyogenic yield as compared to primary iPSC, and are useful in drug discovery, disease modeling and cell-based therapy.

The invention discloses a novel application of HIP-55 (hematopoietic progenitor kinase 1 [HPK1]-interacting protein of 55kDa). The invention provides an application of an HIP-55 protein, an HIP-55 protein coding gene or a recombinant vector containing the HIP-55 protein coding gene or adenovirus containing the HIP-55 protein coding gene to preparation of products with the function (1) or (2): (1) suppression of cardiac fibroblasts proliferation; and (2) suppression of P38MAPK (P38 mitogen activated proteinkinase) activity; and an amino acid sequence of the HIP-55 protein is a sequence 2 in a sequence table. Experiments prove that the HIP-55 has expressions in different organs of a rat, especially has a high-level expression in the heart and further has an overexpression in cardiac fibroblasts of a small rat under the induction of ISO (isoprenaline), and therefore the HIP-55 can be used for remarkably suppressing the cardiac fibroblast proliferation; and the HIP-55 can be used for suppressing P38MAPK activation induced by ISO and the kinase activity in the overexpression of HIP-55 cardiac fibroblasts.

The invention discloses RNA and application of RNA in diseases of a cardiovascular system. According to RNA, the nucleotide sequence of RNA is a sequence 3 in a sequence table. The invention further provides a gene,encoding RNA. The nucleotide sequence of the gene of RNA is a sequence 4 in the sequence table. The experiment of the invention shows that RNA and the application of RNA in the diseases of the cardiovascular system find that by an induction of isoproterenol (ISO), RNAi method Knock down IHP-55 is used in neonatal rat cardiac fibroblasts to obviously promote proliferation of cardiac fibroblasts; ISO induced activation and kinase activity of P38MAPK can be enhanced in the Knock-down HIP-55 cardiac fibroblasts; and HIP-55 is a new protein which has a protective effect on cardiac fibrosis, and provides a new target for clinical diagnosis, treatment and new medicament development.

The invention discloses a method for culturing adult mouse cardiac fibroblasts. The method comprises the following steps: taking SPF grade 8-12 weeks-old mice, and sterilizing the material after cervical dislocation; taking out the heart of the mice and placing the mice in a culture dish containing pre-cooled calcium-free HBSS, extruding the residual blood in the heart, removing the heart atrium,left and right auricula, and pericardium, preserving the ventricle, transferring the material to a new culture dish containing the pre-cooled calcium-free HBSS, cutting the heart, transferring the material to a centrifuge tube, and after the cardiac tissue is precipitated, sucking the HBSS by a pipette; adding a collagenase digestion solution in the centrifuge tube for digestion, and then resuspending the material to obtain a cell suspension; spreading the material into a first culture dish and performing standing culture; resuspending the cells, discarding a supernatant by centrifugation, spreading the resuspended cells in the medium to a second culture dish, and adding the original first culture dish to the new medium. The culture method is simple and easy, has good stability, high repeatability and uniform morphology, and the obtained fibroblasts grow well.

The invention provides a preparation method of epicardial cells from multipotent stem cells. The method comprises the following steps: (1) by activating WNT signal pathways, inducing the multipotent stem cells to be differentiated into mesodermal cells; 2) by inhibiting the WNT signal pathways, converting the mesodermal cells obtained in the step 1) into myocardial precursor cells; 3) by activating retinoic acid signal pathways and the WNT signal pathways, converting the myocardial precursor cells obtained in the step 2) into anterior epicardial cells; and 4) preparing the epicardial cells from the anterior epicardial cells obtained in the step 3). The invention further relates to a method for preparing vascular smooth muscle cells and cardiac fibroblasts from the multipotent stem cells, the epicardial cells, the vascular smooth muscle cells and the cardiac fibroblasts prepared with the method, and application of the epicardial cells, the vascular smooth muscle cells and the cardiac fibroblasts.

The invention provides a method for promoting and inducing differentiation and maturation of multipotent stem cells into myocardial cells by using biogenic amine and application. According to the method, histamine is added into an in-vitro culture for inducing differentiation of the multipotent stem cells into the myocardial cells at a fixed time point so as to induce differentiation and maturation of the multipotent stem cells into the myocardial cells. The invention also provides a method for detecting the time that the histamine promotes ips to differentiate into the myocardial cells, and the concentration of the myocardial cells. The method is mature, simple to operate and environmentally friendly. The cells obtained by the method have characteristic cell surface markers and morphological markers of the myocardial cells, can spontaneously and periodically contract, and are suitable for various applications such as heart disease research, drug screening, cell treatment and the like.

Methods for generating high-yield, high-purity cardiac fibroblasts are described. Differentiation methods comprising chemically defined culture conditions and methods for in vitro maintenance of human pluripotent stem cell-derived cardiac fibroblasts are also provided.

The invention provides a method of using multipotent stem cells to prepare epicardial cells, comprising: 1) inducing multipotent stem cells to differentiate into mesodermal cells by activating a WNT signal pathway; 2) converting the mesodermal cells in step 1) into myocardial precursor cells by inhibiting the WNT signal pathway; 3) converting the myocardial precursor cells in step 2) into preliminary epicardial cells by activating a fibroblast growth factor signal pathway and the WNT signal pathway; preparing pericardial cells with the preliminary epicardial cells of step 3). The invention also relates to: a method of using multipotent stem cells to prepare vascular smooth muscle cells and cardiac fibroblasts; epicardial cells, vascular smooth muscle cells and cardiac fibroblasts all of which are prepared through the above method; and their application.

The invention discloses a method for preparing culture solution for differentiating adipose-derived stromal cells into myocardial cells. 1L of culture solution comprises the following components: 10g of Gibco DMEM(Dulbecco's Modified Eagle Medium) high glucose medium, 2.3g of NaHCO3, 2.6g of N-2-hydroxyethylpiperazine-N-ethane-sulphonicacid (HEPES), 15 to 25 volume percent of Gibco fetal calf serum, 5*104U of penicillin, 5*104U of streptomycin and 75 to 85 volume percent of deionized water. A simple and definite culture solution system for differentiating the adipose-derived stromal cells into the myocardial cells is obtained, and meets higher application security standard.

The invention belongs to the animal cell culture techniques and relates to a method for sorting cardiac fibroblast CD90<+> subsets of mice and application of the cardiac fibroblast CD90<+> subsets. The method comprises the following steps: carrying out recovery and enlarged culture on mice cardiac fibroblast cell strains; sorting cardiac fibroblast CD90<+> subsets by virtue of a PE-marked CD90 antibody; collecting the sorted cardiac fibroblast CD90<+> subsets, carrying out centrifugation to remove supernatant so as to obtain precipitates, inoculating the precipitates into a culture bottle, carrying out enlarged culture, so as to finish the sorting of the cardiac fibroblast CD90<+> subsets of the mice. The sorted cardiac fibroblast CD90<+> subsets are taken as preponderant subsets for sorting cardiac fibroblasts and are used for triggering the myocardium repair potential of the cardiac fibroblasts, so that the experimental basis and theoretical support are provided for the efficient utilization of the cardiac fibroblasts.

The invention discloses use of corilagin in preparation of anti-myocardial fibrosis medicines, belonging to the technical field of biological medicine. By constructing an in-vivo myocardial fibrosis model induced by a mouse aortic ligation operation and an in-vitro myocardial fibrosis model of transforming growth factor (TGF)-beta-induced rat suckling CFs for performing experimental study, the results show that the corilagin can regulate macrophage polarization so as to inhibit inflammation, also can down-regulate an interleukin-4 (IL-4) receptor so as to avoid excessive production of TGF-beta, and inhibits the expression of a TGF-beta receptor so as to reduce the activation of cardiac fibroblasts, thereby reducing collagen content and relieving myocardial fibrosis. The corilagin providedby the invention can reduce the myocardial fibrosis caused by long-term stress load, protect heart tissues and inhibit or delay deterioration of heart functions; the corilagin has a significant effectin the aspect of anti-myocardial fibrosis, is little in side effects, and can be used for preparing the anti-myocardial fibrosis medicines.

Embodiments of the disclosure include methods and compositions for in situ cardiac cell regeneration, including transdifferentiation of cardiac cells to cardiomyocytes. In particular embodiments, in situ cardiac cell regeneration encompasses delivery of p63 shRNA and one or both of Hand2 and myocardin, and in specific embodiments further includes one or more of Gata4, Mef2c, and Tbx5. In specific aspects of the disclosure, adult cardiac fibroblasts are reprogrammed into cardiomyocytes using viral vectors that harbor p63 shRNA and one or both of the transcription factors Hand2 and myocardin.

The invention discloses an application of bone morphogenetic protein-4 in screening drugs for resisting cardiac hypertrophy, heart failure or cardiac fibrosis and belongs to the field of biomedicine. Screened drug types comprise: bone morphogenetic protein-4 formation inhibitor, bone morphogenetic protein-4 antagonistic, bone morphogenetic protein-4 receptor antagonists and bone morphogenetic protein-4 downstream signal antagonistic. The invention also relates to an application of the drugs in preparation of medicines for resisting cardiac hypertrophy, heart failure and arrhythmia. Researches have found that bone morphogenetic protein-4 can induce myocardial hypertrophy, apoptosis and cardiac fibroblast collagen secretion increase, lead to occurrence of cardiac hypertrophy, heart failure and arrhythmia. However, drugs for antagonism of bone morphogenetic protein-4 and its cell signaling pathway can be used to inhibit occurrence of cardiac hypertrophy, inhibit cardiac fibrosis and minimize occurrence of cardiac cell death and arrhythmia. The invention provides a theoretical basis for realizing high-flux medicine screening, and is of practical guiding significance.

Bioengineering the regenerative heart or other body organ in need of greater muscle mass or improved blood perfusion provides a novel treatment for organ weakness or failure. In the case of cardiac failure treatment, on May 14, 2002, a 55-year-old man suffering ischemic myocardial infarction received 25 injections carrying 465 million cGMP-produced pure myoblasts into his myocardium after coronary artery bypass grafting. Three myogenesis mechanisms were elucidated with 17 human/porcine xenografts using cyclosporine as immunosuppressant. Some myoblasts developed to become cardiomyocytes. Others transferred their nuclei into host cardiomyocytes through natural cell fusion. As yet others formed skeletal myofibers with satellite cells. De novo production of contractile filaments augmented heart contractility. Human myoblasts transduced with VEGF165 gene produced six times more capillaries in porcine myocardium than placebo. Xenograft rejection was not observed for up to 20 weeks despite cyclosporine discontinuation at 6 weeks.

The invention discloses a method for improving the efficiency of differentiating brown adipose-derived stem cells into cardiomyocytes and belongs to the technical field of cell engineering. Cardiac stem cells from which brown adipose tissue comes are rich in source, the quantity of collected cells is large, and the cells are easily accepted by a patient; by means of the method, an extracellular matrix derived from cardiac fibroblasts is utilized for improving the differentiation of the brown adipose-derived stem cells into the cardiomyocytes, and the problem that a current isolation culture method is low in efficiency of differentiating brown adipose-derived stem cells into cardiomyocytes is solved.

The present disclosure involves the use of reprogramming factors including AKT1, GATA4, TBX5, MEF2C, HAND2 and either ZNF281 or AS-CL1 to reprogram adult non-cardiomyocytes, such as cardiac fibroblasts into cardiomyocytes, both in vitro and in vivo. Such methods find particular use in the treatment of patients post-myocardial infarction to prevent or limit scarring and to promote myocardial repair.

The invention discloses applications of ZEB1 (zinc finger E-box binding homeobox 1) in human cardiac fibroblasts. According to the applications, ZEB1 is adopted as the research object, ZEB1 interference small fragments are synthesized for transfecting the cardiac fibroblasts, the result shows that ZEB1 promotes the proliferation, migration, differentiation and collagen synthesis of the cardiac fibroblasts, and research is further carried out by controlling the functions of miR-590-3p expressed by ZEB1 in the cardiac fibroblasts. After interference of ZEB1, the verification shows that the cellfunction phenotype caused by miR-590-3p can restore, which proves that ZEB1 is an important function target of miR-590-3p in the cardiac fibroblasts, and miR-590-3p can regulate the functions of the fibroblasts through ZEB1. Through the applications of ZEB1 and the ZEB1-targetting miRNA in the cardiac fibroblasts, a very good application value is achieved for researching the fibrosis mechanism after myocardial infarction.

This invention relates to a method for inducing or enhancing the differentiation of pluripotent stem cells into cardiomyocyte via casein kinase 1 inhibition said method comprising culturing the stem cells in the presence of a medium comprising a casein kinase 1 inhibitor of the formula (I) or (II) or a stereoisomer, tautomer, or a salt thereof wherein R¹, R² and R³ independently from another represent hydrogen, optionally substituted alkyl, alkenyl, alkynyl, heterocyclyl, heteroaryl or aryl; X represents NR⁴, O or S; and R⁴ represents hydrogen, optionally substituted alkyl, alkenyl, alkynyl, heterocyclyl, heteroaryl or aryl. The method can be used in the late phase of stem cell differentiation and in the compounds of formula (I) or (II) in combination with other small molecules can lead to especially high differentiation of stem cells into cardiomyocytes. The invention further relates to novel compounds which can be used in the method of the invention and kits for stem cell differentiation.