912 results about "Cell growth" patented technology

The invention discloses a light-driven synthetic flora and application thereof. The light-driven synthetic flora comprises phototrophic bacteria and heterotrophic bacteria, the phototrophic bacteria are genetically modified synechococcus slender, and the gene modification comprises construction and expression of heterologous sucrose permease, glyceraldehyde dehydrogenase and sucrose synthase in the synechococcus slender; and the heterotrophic bacteria are the P.adami. According to the light-driven synthetic flora disclosed by the invention, carbon dioxide is converted into cane sugar through photosynthesis of phototrophic bacteria, and the cane sugar is secreted out of cells to provide a carbon source for heterotrophic bacteria; carrying out cell growth and polyhydroxyalkanoate synthesis on the heterotrophic bacteria by using cane sugar; therefore, the light-driven synthetic flora provided by the invention can realize direct conversion of carbon dioxide into polyhydroxyalkanoate without additional carbon sources, has the advantage of environmental friendliness, and provides a new economical and feasible scheme and approach for production of polyhydroxyalkanoate.

The invention provides a cell growth state detection method based on image segmentation, and belongs to the technical field of cell image processing and segmentation. Collecting a cell image in real time, and inputting the collected cell image into a hierarchical division feature encoder to obtain a cell block coarse-grained feature and a cell boundary fine-grained feature; inputting the cell block coarse-grained features and the cell boundary fine-grained features into a cascade feature fusion network to obtain deep fusion features; inputting the deep fusion feature into a decoder to obtain a cell image instance segmentation result; and calculating the number and survival rate of the target cells according to the cell image instance segmentation result. The newly designed image extraction and segmentation network is combined with a double-task cooperative training strategy, a cell image instance segmentation task and a cell image semantic segmentation task are combined, real-time detection of the cell growth state is achieved, time consumption and low efficiency of manual observation in a traditional method are avoided, and the method is suitable for real-time detection of the cell growth state. And pollution and damage possibly caused by manual sampling are avoided.

The current invention provides a biocompatible energy recharge system to normalize body functions for a mammal. Both stationary and circulatory scalar wave energy was produced and utilized to enable the entire body of a mammal to increase the energy potential of any cell in the body, to promote cell growth, to facilitate cell repair, and to reduce cell destruction, hence the cells, organs, systems and the entire body of a mammal become healthy, and to treat a disease or disorder. The invention is a combination of the generators of the three-dimensional bio-waves in the stationary and in the circulationary formats for empowering the cells in all parts of a mammal, and a method of using the 3D bio-waves uniformly to empower each organ of a mammal to restore and maintain the normal body health and function.

The invention provides a cell growth dynamics prediction method and device based on a space-time image sequence, and belongs to the technical field of computer vision and deep learning. The method comprises the following steps: acquiring a multi-focal-plane space-time image sequence containing a cell complete growth process; preprocessing and normalizing images in the image sequence to obtain a final test image sequence; and inputting the test image sequence into a cell growth dynamics prediction model consisting of a multi-scale feature extraction module and a time sequence modeling module which are connected in sequence to obtain a cell growth stage identification result corresponding to each time point image in the sequence so as to realize cell growth dynamics prediction. The method can effectively solve the problems of poor adaptability, insufficient stability, high labeling cost and the like when a traditional model is used for processing the dynamic medical image sequence, and has remarkable advantages and application prospects in the aspect of dynamic prediction of the cell growth space-time image sequence.

Disclosed are methods, means, and compositions of matter useful for the stimulation of angiogenesis directly by administration of membrane vesicles, such as fibroblast-derived exosomes, and / or through induction of angiogenic cytokines from blood cells contacted with fibroblast-derived exosomes. The invention provides means of treating conditions in which angiogenesis is beneficial through local or systemic administration of exosomes, including those derived from fibroblasts, wherein the fibroblasts are cultured under basal conditions or conditions of hypoxia. In other embodiments exosomes derived from fibroblasts are utilized to augment endogenous regenerative processes, such as hematopoiesis, angiogenesis and neurogenesis, as well as augment regenerative processes stimulated by administration of exogenous therapeutics such as cells, growth factors, or genes.

The invention relates to a triple-hole paper-based three-dimensional cell culture chip as well as a preparation method and application thereof. The chip comprises a paraffin hydrophobic region and a paper-based hydrophilic region. The preparation method mainly comprises the following steps: 1) designing a mask plate; 2) cutting the mask plate by laser; and 3) preparing the triple-hole paper-based chip by hot pressing. The thickness of the chip is 100-200 [mu] m, the porous fiber structure of the paper-based material allows transportation of oxygen and waste, and a three-dimensional microenvironment for in-vivo cell growth can be simulated. Meanwhile, a transparent and liquid-tight supporting layer is fused on the lower layer of the paper-based chip, so that leakage of cells inoculated on the upper layer of the paper-based chip is avoided. The paper-based chip is embedded into a 6-pore plate, and bladder cancer cells (5637), mouse astrocytoma (U87) and human breast cancer cells (MCF-7) are inoculated in a paper-based hydrophilic region respectively. The cell compatibility of the paper-based chip and the growth behaviors of three different types of cells in three-dimensional paper fibers are investigated. It is proved that the chip can be used for researching three-dimensional construction and growth of human and mammalian cells, and the difference between three-dimensional culture and two-dimensional culture is revealed by detecting the proliferation capacity and survival rate of different cells.

The invention discloses a pharmaceutical composition for promoting aTreg cell differentiation and application thereof, and relates to the field of biological medicine, and the pharmaceutical composition comprises zinc salt, a basic cell culture medium, fetal calf serum, antibiotic, L-glutamine and a pH buffer agent. According to the application, the basic cell culture medium is used for providing basic nutrition required by cell growth for lymphocytes, the fetal calf serum is used for providing growth factors, hormones, adhesion proteins and nutrient substances required by cell growth for the lymphocytes, and the antibiotics are used for preventing bacterial infection; l-glutamine provides key amino acid for cell energy metabolism and participates in synthesis of protein and nucleic acid, zinc salt provides zinc ions, and under the comprehensive action, the proportion of Treg cells and aTreg cells differentiated from lymphocytes in peripheral blood mononuclear cells is increased.

The invention provides a dual-targeting carrier material, a preparation method thereof and a preparation method of oleanolic acid nanoparticles wrapped by the dual-targeting carrier material, and belongs to the technical field of medicines. The oleanolic acid targeting nanoparticles are prepared by taking a dual-targeting high-molecular copolymer as a carrier material and adopting an emulsification-solvent evaporation method, so that the oleanolic acid can be protected from being quickly degraded, and the in-vivo circulation time of the oleanolic acid can be prolonged. Meanwhile, targeted delivery of oleanolic acid is realized through a targeted group, the concentration of the drug in tumor tissues is improved, and toxic and side effects on normal tissues are reduced. An MTT method is adopted, the inhibition effect of the oleanolic acid nanoparticles on cell growth is researched, and the result shows that the oleanolic acid targeting nanoparticles have a stronger effect of inhibiting tumor cell proliferation compared with an oleanolic acid raw material medicine.

The present invention relates to the technical field of biopharmaceutical apparatuses, in particular to a sterile culture method and a sterile culture system. The sterile culture system comprises a cell preparation device, an incubator, and a cell culture device; the cell preparation device comprises a preparation chamber, wherein a first sealing valve is arranged on a side wall of the preparation chamber; the incubator has a culture cavity, wherein a second sealing valve is arranged on a side wall of the culture cavity, and the second sealing valve is configured to work with the first sealing valve such that the incubator is hermetically docked with or separated from the cell preparation device; and the cell culture device is used for accommodating the incubator, supplying power and a gas to the incubator, and controlling a cell growth environment in the incubator. Because cells grow in a sterile environment all the time and the pollution risk is relatively low, no frequent sterilization is required. Normal growth of cells is avoided from being affected by frequent sterilization, and the culture time is saved. Therefore, the cell preparation and culture efficiency is relatively high.

The invention relates to the technical field of stem cell injections, in particular to a human umbilical cord mesenchymal stem cell injection and a preparation method thereof. The cell cryoprotectant comprises the following components: a cell cryoprotectant and P6-generation human umbilical cord mesenchymal stem cells. By selecting P6-generation human umbilical cord mesenchymal stem cells, the capacity of secreting hepatocyte growth factors (HGF) can be improved; the cell cryoprotectant contains 6-9wt% of dimethyl sulfoxide and a certain amount of human serum albumin, can better protect cells and maintain the motility rate and biological functions of the cells, and is more beneficial to preparation of cryopreserved human umbilical cord mesenchymal stem cell injection. The P6-generation human umbilical cord mesenchymal stem cells are obtained by culturing a culture medium containing fetal calf serum, and the ability of the injection to repair liver injury can be improved.

The invention discloses a biological composite material as well as a preparation method and application thereof. The biological composite material comprises a decellularized biological amnion, mesenchymal stem cells and polypeptide hydrogel. In the polypeptide hydrogel, the sequence of the polypeptide is IGSRVGDRGDS. The biological composite material can effectively promote cell growth at a thin endometrial injury position, endometrial cell proliferation activity is higher, new vessel production related gene regulation activity is enhanced, fibrosis caused by the endometrial injury is well inhibited, re-adhesion after an intrauterine adhesion separation operation is prevented, and a good application prospect is achieved. The fertility is obviously improved, and the pregnancy rate is increased.

The invention relates to the field of microorganisms, and discloses lactobacillus rhamnosus and application thereof. The lactobacillus rhamnosus with the preservation number of CGMCC (China General Microbiological Culture Collection Center) No.33153, provided by the invention, has relatively strong reproductive capacity, can produce lactic acid and hydrogen peroxide at high yield, and has relatively strong antibacterial performance; the polypeptide has the potential of being applied to organisms; the composition can regulate and control inflammation and apoptosis related genes, so that the generation amount of inflammatory factors is reduced, cell growth and repair are promoted, and gene expression of aquaporin and collagen can be up-regulated, so that skin repair is promoted.

Disclosed in the present invention are a gel having a regulatable free water content and morphology, a preparation method therefor, and the use thereof. The method comprises: S1, preparing a solution A from a natural polymer material; S2, mixing a small molecule material containing a positively charged polar group with the solution A to obtain a composite solution B; S3, mixing the composite solution B with a regulator to obtain a composite solution C, stirring same, then adding a condensing agent to the reaction system, and carrying out a curing crosslinking reaction; and S4, removing the regulator and the condensing agent to obtain the gel. By adjusting the concentrations of the natural polymer material and the regulator, gels having different morphologies can be prepared; the gel undergoes a physical process to remove hydrogen bond interaction between the gel and free water, so that the content of free water attached to the surface of the gel can be regulated, thereby regulating the physical and chemical properties of the gel. The gel of the present invention has regulatable morphology and controllable elastic modulus, and has many advantages such as good lubrication effect, good biocompatibility and biodegradability, capability of being biologically active, and capabilities of stimulating cell growth and accelerating wound repair.

The present invention relates to the field of bioengineering technology and provides a sucC mutant and its application in the fermentative production of L-valine. By performing point mutations on the sucC gene, the present invention reduces the enzyme expression activity, balances the metabolic flux problem between the TCA cycle for cell growth and product accumulation, and thus improves the valine yield. Further, through experimental screening, a recombinant strain capable of significantly increasing the valine yield is obtained. From the fermentation results, it can be seen that this method can significantly increase the valine yield, from the original 1.3 g / L to 1.61 g / L, with a 23.8% increase in yield, providing strong strain support for further industrialization.

The invention discloses a zinc-selenium doped white calcium stone injectable hydrogel for treating melanoma and a preparation method of the zinc-selenium doped white calcium stone injectable hydrogel. The preparation method comprises the following steps: 1, preparing hydrophilic zinc-selenium doped white calcium stone; 2, preparing oxidized sodium alginate; and (3) dispersing the hydrophilic zinc-selenium-doped white phosphorus calcium stone into the oxidized sodium alginate solution, adding the carboxymethyl chitosan solution, and uniformly mixing to obtain the zinc-selenium-doped white phosphorus calcium stone injectable hydrogel for treating melanoma. The injectable hydrogel prepared by the invention has good injectability, self-healing property and biocompatibility, and is suitable for tumor wound models with any shape and depth; the composition has good effects of promoting normal cell proliferation and inhibiting tumor cell growth, and can be used for tumor postoperative treatment to inhibit tumor recurrence and promote surgical defective tissue repair.

The present invention relates, in part, to methods, compounds, and compositions of KRAS G12D inhibitors in combination with dual RAF / MEK inhibitors for the treatment of abnormal cell growth (e.g., cancer).

The invention discloses an anisotropic electrostatic spinning patch with ultrasonic response and a preparation method thereof, a fiber membrane with a controllable anisotropic structure is constructed by a biodegradable polymer, antibacterial nanoparticles and a photoinitiator system through a step-by-step directional electrostatic spinning process, so that the mechanical matching property of the fiber membrane is improved; cell growth can be directionally guided and tissue regeneration can be accelerated by combining the piezoelectric material characteristics of the introduced biodegradable polymer with piezoelectric characteristics and electric field stimulation induced by the fiber topological structure; meanwhile, a zwitterionic coating is generated on the surface of the fiber membrane in situ by utilizing a single-sided photocuring technology, and an anti-adhesion function is realized on the single side of the fiber membrane. Furthermore, the soft tissue repair patch which has multiple functions of adjustable mechanical property, infection resistance, adhesion resistance and the like and has better structural mechanical suitability, function integration and tissue regeneration guiding capability is prepared by adopting the anisotropic electrostatic spinning patch with ultrasonic response.

The invention relates to a preparation method and application of a functional gradient layered bone-imitating GBR (Guarantee Boron Reactor) membrane, the GBR membrane is a novel GBR membrane obtained by taking decellularized fish scales as a base material, constructing an EGCG-fish scale complex through EGCG cross-linking modification and then combining biomimetic mineralization, and the GBR membrane has certain mechanical properties and can maintain a space required by bone regeneration; meanwhile, mineralized hydroxyapatite wraps fish scale collagen, so that the degradation speed of fish scales is reduced, the action time is prolonged, and sufficient time is provided for bone repair; in addition, the mineralized fish scales are similar to natural cortical bones in structure and composition, a cell growth microenvironment is simulated, good biocompatibility is achieved, adhesion and differentiation of osteoblasts are promoted, and the healing speed is increased.

The invention discloses a method for establishing a cell line by serum-free culture of PGCs (Primordial Germ Cells) of breeding poultry, the cell line is prepared by blending calcium-free DMEM (Dulbecco Modified Eagle Medium), water and Knockout-DMEM, the cell line is more suitable for osmotic pressure and calcium ion concentration required by proliferation of the PGCs of the breeding poultry, various components of serum-free culture are perfected by using fresh egg white, and the cell line is more suitable for proliferation of the PGCs of the breeding poultry. The combination of growth factors required by primordial germ cells is optimized by adding the FGF-1, so that 100% of cell line establishment efficiency and rapid growth of cells from reproduction crescent, blood and gonad tissues of chicken embryos are realized, and a technical basis is provided for poultry frozen breed conservation, stem cell propagation and gene editing operation.

A treatment method, wherein a drug containing a DNA alkylating agent prodrug compound and a salt, ester, solvate, and isotopic isomer thereof and a drug upregulating p53 protein expression or activating p53 function are used in combination for treating cancer and tumor patients. Use of the drug containing the DNA alkylating agent prodrug compound and a salt, ester, solvate, and isotopic isomer thereof in combination with the drug upregulating p53 protein expression or activating p53 function in the preparation of a drug for treating cancers and tumors. A method using the DNA alkylating agent prodrug compound and a salt, ester, solvate, and isotopic isomer thereof in combination with the drug upregulating p53 protein expression or activating p53 function in order to inhibit the growth of cells which are separated from organisms. A pharmaceutical composition containing the DNA alkylating agent prodrug compound and a salt, ester, solvate, and isotopic isomer thereof and the drug upregulating p53 protein expression or activating p53 function; the pharmaceutical composition is configured such that the drug containing the DNA alkylating agent prodrug compound and a salt, ester, solvate, and isotopic isomer thereof and a drug containing a p53-MDM2 inhibitor are used in combination for treating cancer and tumor patients.

The invention discloses a method for realizing high-efficiency selenium labeling of protein, which comprises the following steps of: in the process of expressing plasmids containing target protein through a prokaryote expression system, realizing high-efficiency replacement of cysteine sulfur atoms in the target protein by selenium atoms by regulating and controlling the ratio of selenium to sulfur elements in a culture medium; on the premise of keeping a good growth state of cells, the selenium labeling efficiency can reach 86%, and the protein expression quantity is stabilized at about 1mg / g (protein / thallus wet weight); structural analysis shows that the secondary structure of the obtained selenium-labeled protein is basically consistent with that of natural protein and is not obviously changed. The method is easy and convenient to operate, high in labeling efficiency, high in protein yield, good in repeatability and suitable for structural biology research such as nuclear magnetic resonance, an effective means is provided for research of the functional mechanism of sulfur atoms in biomacromolecules (including small peptides, polypeptides, peptide fragments, proteins and protein or peptide complexes) with selenium as a probe, and the method has a wide application prospect. Good scientific research application prospects and industrial popularization values are realized.

The present invention relates to compounds of formula (I)or pharmaceutically acceptable salts thereof, wherein Ring A, R1-R8, and n are defined herein. The novel benzisoxazole sulfonamide derivatives are useful in the treatment of abnormal cell growth, such as cancer, in patients. Additional embodiments relate to pharmaceutical compositions containing the compounds and to methods of using the compounds and compositions in the treatment of abnormal cell growth in patients.

The invention discloses a construction method of a human epidermal organoid, and belongs to the technical field of organoid cell culture. The method is mainly used for optimizing a culture method of human epidermal organoid, and particularly relates to an efficient epidermal organoid culture technology based on a specific culture medium and an enzyme digestion system. According to the method, a # imgabs0 # human epidermal organ complete culture medium is adopted for preparation, and a basic culture medium and an additive are mixed to form the complete culture medium suitable for cell growth. The primary specimens are treated, and the steps of cleaning, digestion, cell collection and the like are included, so that the activity and functions of cells are ensured. Through accurate inoculation and culture conditions, the formation and growth of the organoid are promoted, and the culture in a proper environment is ensured, so that the formation efficiency of the organoid is improved. The organoid is subjected to passage and cryopreservation treatment, so that the activity and functional stability of the organoid in the long-term storage and use process are ensured.

The present invention addresses the problem of providing: synovium-derived mesenchymal stem cells that stably exhibit an excellent therapeutic effect on joint diseases; an arthropathy therapeutic agent that contains the synovium-derived mesenchymal stem cells; a method for producing the synovium-derived mesenchymal stem cells; and a method for selecting synovium-derived mesenchymal stem cells for use as an arthropathy therapeutic agent. The present invention provides synovium-derived mesenchymal stem cells that express at least one of a hepatocyte growth factor, a transforming growth factor β-inducing protein, and tumor necrosis factor superfamily 15.

The invention discloses a flos magnoliae chloroform part extract, a preparation method thereof and application of the flos magnoliae chloroform part extract in resisting tumors and reversing tumor drug resistance. According to the method disclosed by the invention, the magnolia flower methanol extract, especially the chloroform extract thereof, is efficiently extracted by adopting operation means of extracting and separating natural products such as solvent extraction and extraction, and experiments prove that the magnolia flower chloroform extract has the activity of inhibiting the growth of tumor cells in vitro, so that the magnolia flower chloroform extract has the anti-tumor activity. Meanwhile, the chloroform part of flos magnoliae also can inhibit the expression of EGFR TKI drug-resistant pathway related proteins, so that the tumor drug resistance can be reversed. According to the invention, the raw material channel of the anti-tumor medicine is expanded, the application of the magnolia flower is expanded, the magnolia flower is developed into a new raw material of the anti-tumor medicine, and the medicinal value of the magnolia flower can be obviously improved.

The invention discloses a hydrogel modified microelectrode array device and a preparation method thereof, the hydrogel modified microelectrode array device comprises a microelectrode array composite layer, a passivation layer, a hydrogel layer and a cell culture ring, the cell culture ring is arranged on the microelectrode array composite layer, and the passivation layer and the hydrogel layer are located in the cell culture ring; the microelectrode array composite layer comprises a microelectrode array with polydimethylsiloxane as a base material, at least part of the microelectrode array in the cell culture ring is exposed, and at least part of gaps of the exposed microelectrode array are filled with the passivation layer; the hydrogel layer grows on the surface of the polydimethylsilane, and a microgroove is formed in the exposed microelectrode array and passivation layer area to serve as a cell growth area. According to the invention, cell patterning can be realized on the microelectrode array, cell electrophysiological activity can be monitored for a long time, and the microelectrode array has the advantages of remarkable cell patterning promotion capability, high stability and robustness, flexible cell pattern design, excellent biological compatibility and simple process.

Provided herein are self-assembling collagen-like peptide (CLP) comprising a plurality of amino acid trimer repeats having the amino acid sequence POG, wherein P is a proline, O is an hydroxyproline or a cysteine, and G is a glycine or a valine. Also provided herein are compositions, scaffolds, photoactivatable hydrogel precursors and hydrogels comprising the CLP and a multi-arm polyethylene glycol (PEG) polymer. Methods of preparing photoactivatable hydrogel precursors and hydrogels are also described. Methods of treating a wound, of treating a corneal disease, of treating a myocardial infarct, of promoting cell growth and of treating cellular degeneration using the compositions, scaffolds, photoactivatable hydrogel precursors and / or hydrogels are also described. Also provided is a device for delivering a peptide-based material. The device comprises an on / off button or switch for initiating and stopping delivery of the peptide-based material in the subject; a chamber for containing the peptide-based material; an aperture through which the peptide-based material exits the chamber, wherein the aperture is adapted for receiving a nozzle adapter; a camera port for securing a camera thereto; and a digital control display.

The invention discloses a field crop growth monitoring method based on low-altitude remote sensing multi-scale data, relates to the technical field of agricultural remote sensing and intelligent monitoring, and is used for solving the problem that a monitoring method integrating multi-scale remote sensing data and having high precision, high adaptability and high efficiency is lacked in the prior art. The method comprises the steps of collecting remote sensing image data of a monitoring area, performing splicing and spectrum correction on images, extracting canopy coverage, vegetation indexes, colors and texture features to construct a feature matrix, and dividing different cells based on clustering analysis; carrying out sampling analysis on the key cells at the middle-distance flight height, further obtaining cell growth vigor characteristics and determining sampling points; single plant growth vigor diagnosis is completed, and a diagnosis result is output; the method can be widely applied to field crop growth monitoring and precision agricultural management work.

The present invention discloses a low - serum medium and its application in the preparation of cultured meat from Larimichthys crocea cells, which is also applicable to other marine or freshwater fish, belonging to the field of bioengineering technology. The low - serum medium comprises a basal medium, fetal bovine serum accounting for 30 - 80 μL / mL, and exogenous additives. The exogenous additives include human serum albumin, ascorbic acid, basic fibroblast growth factor polypeptide, human holo - transferrin, lysophosphatidic acid, and human recombinant IGF - 1. Based on the DMEM / F12 medium, the low - serum medium provided by the present invention adds six substances that promote cell growth, reduces the dependence of satellite cells on fetal bovine serum, effectively reduces the usage amount of fetal bovine serum, and saves the culture cost. Compared with the general - type medium (DMEM high - glucose, adding 10% FBS), the low - serum medium provided by the present invention has an equivalent effect on the maintenance and proliferation ability of cell stem cells.

The invention relates to the technical field of biopharmaceutical equipment, in particular to a sterile culture method and a sterile culture system. The sterile culture system comprises a cell preparation device, an incubator and a cell culture device, the cell preparation device comprises a preparation chamber, and a first sealing valve is arranged on the side wall of the preparation chamber; the incubator is provided with a culture chamber, a second sealing valve is arranged on the side wall of the culture chamber, and the second sealing valve is used for being matched with the first sealing valve, so that the incubator and the cell preparation device are in sealed butt joint or sealed separation; the cell culture device is used for accommodating the culture box, supplying power and gas to the culture box and controlling the cell growth environment in the culture box. As the cells always grow in the sterile environment, the pollution risk is low, frequent sterilization is not needed, the normal growth of the cells is prevented from being influenced by frequent sterilization, the culture time is saved, and the cell preparation and culture efficiency is high.