113 results about "Myogenic cell" patented technology

The invention discloses an enhancer Enh483 related to bovine muscle development and application of the enhancer Enh483 in promoting bovine myoblast proliferation and / or differentiation. According to the method, existing ATAC-Seq data and Chip-seq data in the proliferation stage and differentiation stage of buffalo myoblasts are utilized to visually analyze chromatin open areas through IGV to predict annotation enhancers, candidate enhancers Enh483 related to muscle development are screened out, and the enhancers have enhancer activity detected by a dual-luciferase vector report system; after the activity of Enh483 is inhibited, the proliferation and differentiation of buffalo myoblasts can be inhibited, which indicates that Enh483 can promote the proliferation and / or differentiation of buffalo myoblasts. According to the invention, an important theoretical basis is provided for an action mechanism of transcription regulation elements such as enhancers in muscle development, and data support is provided for buffalo breeding and strain breeding.

The invention discloses a method for promoting skeletal muscle development and application, and belongs to the technical field of biology. The invention provides a method for promoting skeletal muscle development, an AMPK / p38MAPK pathway is regulated and controlled by activating PPARalpha, the way of activating the PPARalpha is to give a PPARalpha agonist GW7647, and the regulation and control of the AMPK / p38MAPK pathway is shown as reduction of AMPK and P38 phosphorylation levels. Experiments show that the expression of MyoD, MyoG and Pax7 in skeletal muscle can be remarkably improved by activating PPARalpha, the phosphorylation level of AMPK and P38 is inhibited, and therefore muscle fiber proliferation and myoblast proliferation are promoted. The technology can be applied to livestock breeding to improve meat yield or develop drugs for treating skeletal muscle atrophy, and has remarkable economic and clinical values.

The invention provides a method for producing cell culture meat through 3D scaffold-free co-culture of pseudosciaena crocea stem cell spheres, and belongs to the technical field of preparation of cell culture meat. A method for producing cell culture meat by 3D scaffold-free co-culture of pseudosciaena crocea stem cell spheres comprises the following steps: mixing and inoculating pseudosciaena crocea myoblasts and pseudosciaena crocea precursor adipocytes into a cell culture plate subjected to anti-adhesion treatment for proliferation culture, spontaneously gathering to form cell spheres, and carrying out differentiation culture to obtain the cell culture meat. According to the co-culture mode provided by the invention, high-efficiency myogenic differentiation and adipogenic differentiation of myoblasts and precursor adipocytes of the large yellow croakers can be realized through proliferation culture and differentiation culture, and an in-vivo microenvironment can be effectively simulated, so that cultured meat similar to a traditional meat product in texture and flavor is produced.

The invention discloses hydrogel for repairing volumetric muscle defects and a preparation method of the hydrogel, and the hydrogel is prepared from oxidized dextran, an alcohol-polyamino acid-bilirubin polymer and 3, 3 '-dithio-bis (propionyl hydrazide) according to the weight ratio of (50-75): (4-20): 1. The alcohol-polyamino acid-bilirubin polymer is prepared from an alcohol-polyamino acid polymer and bilirubin in a weight ratio of (6-25): 1. The hydrogel prepared by the invention not only has good characteristics of pH / ROS responsiveness, relatively strong tissue adhesion, antibacterial property, oxidation resistance and relatively low cytotoxicity, but also can remarkably promote cell migration, proliferation, new angiogenesis and myoblast differentiation, promote recovery of muscle structures and motor functions after volumetric muscle defects, and improve the recovery rate of muscle tissues and motor functions after the volumetric muscle defects. The material is expected to become a novel bioactive material capable of promoting volume muscle defect repair, and has a good application prospect in clinical treatment of large-volume tissue defect regeneration.

The invention relates to application of a yeast peptide-derived polypeptide in promoting proliferation and differentiation of myoblasts and a composition, and belongs to the technical field of biological medicines and nutrition and health care. The amino acid sequence of the polypeptide comprises SEQ ID No.1 (LGGPLL), SEQ ID No.2 (PQAVTI), SEQ ID No.3 (VASGGL) or SEQ ID No.4 (LGPTGISM, and the polypeptide can be used for remarkably promoting the proliferation and the cell cycle progress of C2C12 myoblasts and up-regulating the expression level of myogenic protein. The polypeptide can be used as an active component to be applied to development of anti-sarcopenia related medicines or functional food compositions. Cell experiments prove that the polypeptide has a good muscle promoting function and is suitable for intervention of senile muscle loss such as sarcopenia and the like.

The invention provides a motor neuron and myotubular cell co-culture method and model and application thereof. The motor neuron and myotubular cell co-culture method comprises the steps that motor neuron is cultured to form a neural network, and a motor neuron culture layer with the formed neural network is obtained; culturing myoblasts, inducing differentiation to form fine myotube cells, adding a mitosis inhibitor, and digesting and separating to obtain the fine myotube cells; and inoculating fine myotubular cells to the motor neuron culture layer with the formed neural network, and co-culturing. The co-culture method disclosed by the invention overcomes the limitation of a traditional nerve cell and muscle cell co-culture method, and has the advantages of simplicity, convenience, high efficiency, stability and the like. The method not only provides an effective experimental tool for related basic research of neuromuscular joint formation, physiological functions and the like, but also has wide application prospects in the fields of neuromuscular disease research, drug screening, toxicological research, gene therapy and the like.

The invention discloses application of an FGF9 gene in regulation and control of growth and development of chicken skeletal muscles, and further discloses application of an overexpression vector of the FGF9 gene or an interference fragment of the overexpression vector in promotion or inhibition of proliferation and differentiation of chicken myoblasts. The invention also discloses a specific primer pair for detecting the expression quantity of the FGF9 influencing the growth and development of the chicken skeletal muscle. The invention also discloses a detection kit and a detection method thereof. The detection kit provided by the invention can be used for detecting the expression quantity of the FGF9 gene in chicken muscle tissues and myoblasts, and the detection method is simple and quick. The FGF9 gene can be used as an important gene for researching a chicken skeletal muscle growth and development regulation theory.

The invention discloses a bean dreg solid state fermentation preparation and application thereof in treating or preventing sarcopenia, and relates to the field of bean dreg processing, the bean dreg solid state fermentation preparation is obtained by taking lactobacillus paracasei LMX1 and pediococcus acidilactici IFJ1 as fermentation strains, taking bean dregs as a fermentation substrate, firstly performing solid state fermentation and then performing extraction. A myotubular atrophy model is established by inducing mouse myoblast C2C12 injury with TNF-alpha in vitro, the effect of the bean dreg solid-state fermentation preparation on C2C12 cells is explored, the influence of the bean dreg solid-state fermentation preparation on LPS-induced muscular atrophy mice is researched in vivo, and the result shows that the bean dreg solid-state fermentation preparation has potential effects of delaying senescence, promoting growth of muscular atrophy, preventing and treating muscular atrophy. The composition has the effects of preventing muscle atrophy and weakness related to aging and treating sarcopenia, and reference is provided for exploring potential application of plant active ingredients in the aspect of preventing or treating muscle functions.

The invention discloses a CircSESN1 gene as well as an overexpression vector, a specific primer pair, a detection kit and application of the CircSESN1 gene. The invention also discloses application of the CircSESN1 gene, an overexpression vector, the specific primer pair or the fluorescent quantitative detection kit in regulation and control of growth and development of chicken skeletal muscle. The invention also discloses a method for inhibiting chicken myoblast proliferation and / or promoting differentiation. The detection kit provided by the invention can be used for detecting the expression quantity of the CircSESN1 gene in chicken muscle tissues and myoblasts, and the detection method is simple and quick. The gene can be used as an important non-coding RNA for researching a regulation theory of growth and development of chicken skeletal muscles.

The present invention provides a production method for a three-dimensional muscle tissue including the steps of: preparing an approximately rectangular first cell module containing skeletal myoblasts in a hydrogel, and having a plurality of approximately rectangular holes parallel to each other, and an approximately rectangular second cell module containing skeletal myoblasts in a hydrogel, and having a plurality of approximately rectangular holes parallel to each other at positions different from those of the first cell module in a vertical direction; alternately stacking the prepared first cell module and the prepared second cell module to obtain a stack; subjecting the skeletal myoblasts contained in the obtained stack to proliferation culture; and inducing the proliferated skeletal myoblasts to differentiate into myotubes.

The present invention relates to an albumin nanocomposite comprising a phytochemical, and a composition for improving muscle diseases comprising the same, and more specifically, to an albumin nanocomposite comprising a phytochemical, the present invention relates to an albumin nanocomposite containing phytochemicals, and more specifically, to an albumin nanocomposite containing phytochemicals, which exhibits the effects of inhibiting muscle reduction caused by oxidative stress or inflammatory response and promoting the differentiation of myoblasts into muscle cells. The albumin nanocomposite containing the phytochemicals can target and induce immune cells of active oxygen and inflammatory reaction and effectively deliver the phytochemicals, so that muscle cell atrophy is inhibited and differentiation is promoted by adjusting a muscle reduction signal mechanism induced by the active oxygen and the inflammatory reaction, and further muscle reduction can be improved, so that the curative effect of the albumin nanocomposite is improved. The muscular dystrophy is prevented and treated. Therefore, the composition containing the albumin nanocomposite containing phytochemicals of the present invention can be provided as a composition for improving muscle diseases.

This invention relates to the application of oridonin in the preparation of agents that improve muscle function, specifically by improving skeletal muscle dysfunction, enhancing insulin sensitivity, promoting myoblast differentiation into myotube cells, and / or increasing myoblast insulin sensitivity. Using an in vitro C2C12 myoblast model, this invention demonstrates that oridonin can promote myoblast differentiation and growth and increase C2C12 myoblast insulin sensitivity. Through an obesity-induced skeletal muscle dysfunction model, it is demonstrated that oridonin can improve skeletal muscle dysfunction and insulin resistance by increasing muscle strength, muscle endurance, muscle mass, and reducing muscle lipid accumulation. This invention provides new insights for drug research on improving skeletal muscle dysfunction and enhancing insulin sensitivity, and also enriches the pharmacological system of oridonin.

The invention relates to application of O-GlcNAc glycosylation in disuse atrophy resistance of myoblasts, and further relates to a method for improving disuse atrophy resistance of myoblasts, and the method comprises the step of improving the level of O-GlcNAc glycosylation of myoblasts. In the myoblasts with waste atrophy, the O-GlcNAc glycosylation level is obviously reduced, the atrophy of the myoblasts caused by waste conditions can be inhibited by up-regulating the O-GlcNAc glycosylation, and the atrophy of the myoblasts caused by the waste conditions can be intensified by down-regulating the O-GlcNAc glycosylation, so that the myoblasts with waste atrophy can be inhibited. And a new path is provided for detection and treatment of disuse atrophy of myoblasts and muscular tissues.

The invention discloses application of glutamic acid and alpha-KG in promoting differentiation and fusion of skeletal muscle myoblasts. In particular discloses application of glutamic acid and / or alpha-ketoglutaric acid in promoting myoblast fusion. The invention also discloses a method for promoting myoblast fusion. The method comprises the step of contacting myoblasts with glutamic acid and / or alpha-ketoglutaric acid. It is found for the first time that glutamic acid and alpha-KG have the effect of promoting myoblast differentiation and / or fusion, and glutamic acid and alpha-KG can be prepared into feed, feed additives, myoblast fusion promoters and other products to be used for promoting animal muscle development and breeding high-yield and high-quality meat animal products. Experiments show that by adding a proper amount of glutamic acid and alpha-KG in the muscle cell differentiation process, the fusion rate of mouse C2C12 cells and sheep skeletal muscle myoblasts can be remarkably increased, the number of formed myotubes is increased, and the differentiation level of the two cells is promoted. The method has a wide application prospect in the fields of livestock breeding and the like.

The present invention relates to a composition for the improvement and treatment of muscle diseases and cachexia, wherein diflunisal has the effect of promoting the differentiation and proliferation of myogenic cells, and further has the effect of improving and treating cachexia induced by chronic diseases such as muscle diseases or cancer through effects such as increased muscle mass and recovery of muscle strength.

The invention belongs to the technical field of medicines, and particularly provides novel application of eugenol in preparation of products for promoting myoblast differentiation. Cell experiment evaluation proves that the eugenol can remarkably promote C2C12 myoblast differentiation and promote myotube formation, and the eugenol is mainly characterized by increasing the myotube diameter, increasing the myotube length, improving the myotube fusion index and increasing the cell total protein content. Therefore, the eugenol provided by the invention can be applied to preparation of products for promoting myoblast differentiation.

The invention discloses application of poplatin in preparation of a medicine for treating muscle injury. The research finds that the poplatin has the effects of promoting mouse myoblast differentiation and promoting mouse muscle regeneration under various pathological conditions such as acute injury, obesity, diabetes mellitus and hereditary dystrophy.

The application discloses a kind of construction method and application of seawater fish muscle stem cell line, culture medium with basic medium as background medium;Culture medium includes LIF growth factor, EGF growth factor and leopard bristletooth-derived FGF2 protein;The final concentration of leopard bristletooth-derived FGF2 protein is 20~30 ng / mL, 30~45 ng / mL, 45~55 ng / mL or 55~70 ng / mL. Through the medium, immortalized seawater fish muscle stem cell line with good stability, cell division vigorous, short subculture time can be constructed, and can be stably subcultured for more than 50 generations. It provides raw materials for exploring the function of myoblasts, gene regulation mechanism, and provides the prerequisite for in vitro verification experiment for further exploring the influence of seawater fish muscle stem cells on growth rate, and lays a foundation for good strain breeding of seawater fish.

A multi-chimeric cell created by ex vivo fusion of three or more hematopoietic stem cells, mesenchymal stem cells, myoblasts, pericytes, or satellite cells, or a combination thereof, from three or more different donors is provided, as is the use of these cells in transplant therapy and treatment of immune deficiency and genetic disorders.

The invention discloses application of deaminotyrosine in improvement or prevention and treatment of muscular atrophy, and relates to the technical field of biological medicines. The invention finds that in the cellular level, DAT can effectively resist C2C12 myoblast senescence induced by etoposide; in a dexamethasone-induced C2C12 myotube atrophy model, DAT not only inhibits myotube diameter reduction from the form, but also down-regulates mRNA expression of key atrophy genes Atrogin-1 and MuRF-1 from the molecular level, and inhibits excessive activation of a ubiquitin-proteasome system; in-vivo animal experiments prove that DAT can reverse aging-related dyskinesia of rapidly-aged SAMP8 mice, and gait parameters of the rapidly-aged SAMP8 mice are all remarkably improved. According to the invention, a complete evidence chain from cells to the whole is constructed, and the DAT is proved to improve the senescent skeletal muscle atrophy through multiple ways of intervening cell senescence, antagonizing protein degradation, improving muscle microenvironment and the like, and shows important potential application value.

The present invention discloses a bean dregs solid-state fermentation preparation and its application in treating or preventing sarcopenia, relates to the field of bean dregs processing, wherein the bean dregs solid-state fermentation preparation is based on Lactobacillus paracasei LMX1 and Pediococcus acidilactici IFJ1 as fermentation strains, bean dregs as fermentation substrate, first by solid-state fermentation, and then by extraction. The present invention establishes a myotube atrophy model by inducing mouse myoblast C2C12 damage with TNF‑α in vitro, explores the effect of the bean dregs solid-state fermentation preparation on C2C12 cells, and studies the effect of the bean dregs solid-state fermentation preparation on LPS-induced muscle atrophy mice in vivo. The results show that the bean dregs solid-state fermentation preparation has the potential to delay aging, prevent muscle atrophy and weakness associated with aging, and treat sarcopenia, providing a reference for exploring the potential application of plant active ingredients in preventing or treating muscle function.

Provided are a myoblast proliferation promoter and a muscle atrophy inhibitor, each of which comprises a compound represented by structural formula (1).

To provide methods for producing an artificial skeletal muscle tissue from pluripotent stem cells.SOLUTION: The present invention describes a method for preparing an engineered skeletal muscle tissue, as well as skeletal myoblasts, skeletal myotubes, and satellite cells, a medium used being serum-free and different chemicals and their concentrations, as well as the physical stimuli, being defined. Additionally, the methods described herein are performed without transfection of human cells with transgenes. The engineered skeletal muscle cells exhibit myoblast-, myotube-, or satellite cell-specific genetic markers, demonstrating efficient differentiation of these cell types. Despite its engineered production, the skeletal muscle tissue possesses excellent stimulus-dependent contractility and exhibits contractions in response to different stimulation frequencies.SELECTED DRAWING: None

Provided is a method for producing a three-dimensional muscle tissue, comprising: a step for producing a substantially rectangular first cell module that contains skeletal muscle myoblasts in a hydrogel and has a plurality of substantially rectangular holes parallel to each other; a second cell module containing skeletal muscle myoblasts in a hydrogel and having a plurality of substantially rectangular pores parallel to each other at positions different from those of the first cell module in the vertical direction; a step for obtaining a laminate by alternately laminating the produced first cell modules and second cell modules; a step in which the skeletal muscle myoblasts included in the obtained laminate are subjected to proliferation culture; and a step for inducing differentiation of the proliferated skeletal muscle myoblasts into myotubes.

The invention discloses an application of a YTHDC1 gene in regulating myoblast proliferation or differentiation and skeletal muscle development. The influence of the YTHDC1 gene on proliferation and differentiation of myoblasts is researched by inhibiting and overexpressing the YTHDC1 gene in the myoblasts, and it is found that the overexpressed YTHDC1 gene has the functions of promoting differentiation of the myoblasts and inhibiting proliferation of the myoblasts; myoblast proliferation can be promoted and differentiation of myoblasts can be inhibited by inhibiting YTHDC1 gene expression, and muscle growth of mice after birth can be promoted. And further research finds that the YTHDC1 gene affects muscle development by regulating and controlling the variable splicing process of muscle development related genes such as AkaP13, Smarca2, Tnnt3 and Neb. Experimental results provide a research basis for skeletal muscle growth and development regulation and control, and also provide theoretical support for improving meat product quality.

The invention discloses an induction method for oriented myogenic differentiation of sheep iPSCs (induced pluripotent stem cells) and application of the induction method. After sheep induced pluripotent stem cells are subcultured for one day, four-stage induced differentiation is performed by respectively using a differential medium I, a differential medium II, a differential medium III and a differential medium IV; and finally, directionally inducing and differentiating into myoblasts and fusing into myotubes. According to the invention, by applying micromolecules and / or growth factors of a plurality of key signal channels, single-layer adherent sheep iPSCs are successfully gradually and directionally induced and differentiated into myoblasts and fused into myotubes; the method is of great significance in exploring the mechanism of formation of muscle-derived cells in the early stage of sheep embryonic development, exploring molecular breeding markers valuable for muscle development, carrying out in-vitro muscle tissue engineering, researching and developing cultured meat and the like.

The invention relates to application of an FGFBP2 gene in regulation and control of growth and development and cell cycle of chicken skeletal muscle. The inventor finds the existence of the FGFBP2 gene in early-stage work of a team, and also finds that the expression quantity difference of the gene in muscular tissues of chickens in different development stages and varieties is obvious. In order to further reveal the effect of the FGFBP2 gene in the growth and development process of chicken skeletal muscles, the FGFBP2 gene is overexpressed in chicken myoblasts and AA broiler chickens respectively by using an overexpression technology, and detection finds that the overexpressed FGFBP2 gene can promote the proliferation of myoblasts. The discovery that the FGFBP2 gene can regulate and control the proliferation function of the chicken skeletal muscle cells provides a new theoretical basis for revealing the development of the chicken skeletal muscle and improving the meat production character, and provides a new thought for improving the meat production performance of livestock.

The present invention relates to a pharmaceutical composition for preventing or treating diseases related to muscle weakness, which comprises alverine, 4-hydroxyalverine, a derivative thereof or a pharmaceutically acceptable salt thereof. When myoblasts are treated with alverine, 4-hydroxyalverine, a derivative thereof or a pharmaceutically acceptable salt thereof of the present invention, differentiation into myotubes is promoted. Therefore, alverine, 4-hydroxyalverine, a derivative thereof or a pharmaceutically acceptable salt thereof according to the present invention can be effectively used to promote differentiation of myoblasts and prevent or treat diseases related to muscle weakness.

The present disclosure relates to an albumin nanocomposite comprising a phytochemical and a composition for muscle disease comprising the same, and more specifically, to an albumin nanocomposite comprising a phytochemical that exhibits an effect of inhibiting muscle loss caused by oxidative stress or inflammatory response and promoting the differentiation of myoblasts into muscle cells. The albumin nanocomposite comprising the phytochemical effectively delivers the phytochemical by targeting immune cells that induce reactive oxygen species and inflammatory responses. Accordingly, by regulating muscle-loss signaling pathways induced by reactive oxygen species and inflammatory responses, the nanocomposite inhibits muscle cell atrophy and promotes differentiation. Therefore, a composition comprising the albumin nanocomposite comprising the phytochemical according to the present disclosure can be provided as a composition for improving, preventing, or treating muscle diseases.

The invention discloses a method for separating, identifying and proliferating myoblasts of small-tailed han sheep, which comprises the following steps: (1) taking and treating skeletal muscle tissues: selecting healthy small-tailed han sheep, collecting the skeletal muscle tissues under sterile conditions, washing and cutting into pieces to obtain tissue blocks; (2) primary myoblast isolated culture: digesting, filtering and centrifuging the obtained tissue block, and culturing; (3) myoblast purification: purifying the cultured primary myoblasts to obtain purified myoblasts; (4) identifying myoblasts: identifying the obtained purified myoblasts; and (5) proliferation of myoblasts: after identification is completed, carrying out cell proliferation on the purified myoblasts obtained in the step (3) by utilizing a proliferation culture medium containing vitamin E. According to the method provided by the invention, high-purity and high-activity myoblasts can be obtained; vitamin E is utilized, so that the proliferation capacity of myoblasts can be remarkably improved, and the cell differentiation function of the myoblasts is not influenced.