66 results about "Chondrocyte cell" patented technology

The invention relates to a culture method for inducing adipose tissue-derived stromal cells to differentiate to chondrocyte, and aims to solve the problem that the prior art is low in differentiation rate. The culture method comprises the following steps: 1) performing separation of primary cells of adipose tissue-derived stromal cells; 2) performing amplification and passage of the adipose tissue-derived stromal cells; and 3) performing differentiation culture on P5-generation adipose-derived stem cells to chondrocyte, namely, adding the adipose tissue-derived stromal cells into a condition culture medium, namely, an adipose tissue-derived stromal cell chondrocyte differentiation culture medium, after P5 generation of passage, performing chondrocyte differentiation culture, replacing the medium of the cells every 3 days, observing the morphological change of the cells, and after 16 days of induction, performing Alcian blue dyeing, and identifying the chondrocyte differentiation situation of the adipose tissue-derived stromal cells. The result of Alcian blue dyeing identification shows that the chondrocyte can be formed, and the Alcian blue dyeing is positive. The culture method has the characteristics of being simple and feasible, short in induction time as the induction culture medium is a serum-free culture system, good in test repeatability and high in osteoblast differentiation rate.

The invention belongs to the technical field of medicine; in order to solve the problem that no efficient and safe cartilage siRNA delivery system is provided for limiting application of RNAi in treating cartilage diseases, the invention provides a cartilage siRNA liposome delivery system and a preparation method of the delivery system. The delivery system consists of lipidosome, a lipidosome modifier and a small nucleic acid drug, wherein the lipidosome is phosphatidylcholine, cholesterol or Dlin-KC2-DMA; the lipidosome modifier is a polyethylene glycol lipid conjugate; and the small nucleic acid drug is Ihh siRNA. According to the invention, a liposome nano based cartilage RNA interference delivery system is modified, and the formed composite has positive charges, is safe and small in volume, and can be distributed in a full-lamellar cartilage tissue. Carrier experiments verify that siRNA can be delivered into cartilage cells to successful knock out corresponding genes inside the cartilage cells, therefore a bottleneck of gene knockout in the cartilage tissue is broken through; and the siRNA, as a target gene, can be used for treating PTOA (post-traumatic osteoarthritis).

The invention provides a preparation method of cross-linking microspheres based on microfluidics. The preparation method comprises the following steps of pushing an injector of a water phase solutionand an oil phase solution which are prepared in advance through a pushing and injecting pump device, enabling a water-oil two-phase solution to form water-in-oil type emulsion liquid drops at an exitchannel of a micro-fluidic chip, and performing illumination at an ultra-violet curing lamp to prepare PEGDA photo-crosslinking microspheres; and enabling the PEGDA photo-crosslinking microspheres tobe charged into a sodium hydroxide solution so as to obtain PEGDA-chitosan cross-linking microspheres, wherein the diameter range of the cross-linking microspheres is 240-440[mu]m, and is controlled through the flow velocity and the flow velocity ratio of the water phase solution and the oil phase solution. The preparation method is flexible and easy to operate. A preparation method of an injecting type chondrocyte composite body comprises the following steps of A1, preparing the cross-linking microspheres; and A2, enabling the cross-linking microspheres to carry chondrocyte. Biological cellsare carried on the cross-linking microspheres having a dual-network hydrogel system, and through proliferation and disintegration of the biological cells, the injecting type cell composite body can beprepared, and is a novel tissue repair material which is widely applied.

The invention discloses an experimental method for researching anti-articular cartilage cell apoptosis of resveratrol. The ability of resveratrol to inhibit articular cartilage cell apoptosis is verified by establishing crowd research, in vivo experiments and in vitro experiments, and the mechanism of action of resveratrol to inhibit articular cartilage cell apoptosis is discussed to verify the 'effect axis hypothesis' of resveratrol-p38 MAPK signal pathway down-regulation-anti-apoptosis, which proves that the potential action targets of resveratrol in the screened p38 MAPK pathway have a targeting relationship, and further defines the overall regulation effect of resveratrol on a plurality of targets in the pathway. Experiments prove that resveratrol has the ability to inhibit articular cartilage cell apoptosis, and provides experimental basis for clinical practice of resveratrol in treating osteoarthritis.

The invention discloses a preparation method of a zin-ion-containing tissue engineering scaffold with an anti-inflammatory function. The method comprises the following steps: separating Wharton's jelly from a human umbilical cord; preparing a pure Wharton's jelly scaffold through the processes of repeated low-temperature crushing, freeze thawing, gradient centrifugation, pancreatin digestion and elution, vacuum freeze compression drying and the like; performing induced deposition on the pure Wharton jelly scaffold in simulated body fluid containing zinc ions; putting the scaffold in an ammoniawater solution in a hydrothermal kettle and performing a gas-phase hydrothermal reaction; and then performing vacuum freeze drying to obtain the cartilage tissue engineering scaffold containing zincions. The tissue engineering scaffold prepared by the method not only has high histocompatibility but also can successfully load zinc ions and release the zinc ions through a slow release effect, so that macrophage polarization is regulated and an anti-inflammatory effect on cartilage injury in an inflammatory environment is realized; and stem cells can be induced to differentiate into chondrocytes; and a good internal immune environment is provided for cartilage repair.

The methods described herein are for conserving highly expanded cells that have functional properties such as potential for use in neotissue constructs. For example, highly expanded chondrocytes that can be used to construct neocartilage exhibiting functional properties similar to native articular cartilage. The methods and systems feature processes that form functional, human cartilage using cells that have been expanded to at least 1.5×10⁵ times or P3 or greater. This enables a large quantity of engineered cartilage implants to be produced from few cells.

A reinforced matrix membrane containing one or more scaffold-forming proteins suitable for cell growth and for use in chondrocyte cell transplantation, and method of making same. The scaffold is incubated with the collagen matrix in solutions, colloidal dispersions, or suspensions of stabilizing proteins. The reinforced matrix may be used in tissue engineering, cartilage transplantation, bone and cartilage grafting, healing, joint repair and the prevention of arthritic pathologies.

The invention relates to a zuogui pill nanoparticle drug delivery system and a preparation method thereof. The zuogui pill nanoparticle drug delivery system comprises a zuogui pill extract and a polybutylcyanoacrylate nano carrier, wherein the mass ratio of the zuogui pill extract to the polybutylcyanoacrylate nano carrier is 1 to (0.1-10). Due to the technical scheme, with polybutylcyanoacrylate as a raw material, the zuogui pill nanoparticle drug delivery system is prepared by an improved emulsion polymerization method. The zuogui pill nanoparticle drug delivery system used by people has the advantages of continuity, high efficiency, controllability and the like, is capable of continuously and efficiently releasing the zuogui pill effective components, promoting chondrocyte proliferation and differentiation, and is natural, free of toxicity and high in efficiency.

The invention provides a micro-nano hydrogel microsphere for targeted adjustment of a mitochondrial respiratory chain as well as preparation and application of the micro-nano hydrogel microsphere. According to the invention, hyaluronic acid microspheres are prepared through a microfluidic technology, and SS-31 peptide and Wyrgrl peptide modified resveratrol-loaded long-circulating liposome are connected in a microsphere nano network through a non-covalent bond, so that a micro-nano hydrogel microsphere system with a targeted cell MRC adjustment function is constructed. The system has efficient cellular uptake efficiency and mitochondrial targeting, and can significantly improve the MRC function, reduce proton leakage, protect mitochondria, down-regulate ROS expression, and promote generation of cartilage extracellular matrix. Meanwhile, the system can effectively slow down the progress of osteoarthritis in a rat osteoarthritis model. The micro-nano hydrogel microsphere system for the targeted adjustment and control of the cell MRC function, provided by the invention, has great potential in treating various degenerative diseases related to MRC dysfunction.

The invention relates to the field of cells, in particular to a composition, differentiation inducing culturing liquid containing the composition and an inducing method. Selected dental pulp stem cells (dental pulp stem cell, DPSCs) are same with MSCs of other sources, have self-renewing and multi-directional differentiation capacity and have the advantages that cell proliferation in vitro is easy, and the immunogenicity of the cells is low, and the selected dental pulp stem cells can be taken as seed cells to promote repairing and regeneration of injured tissue. Thedifferentiation inducing culturing liquid can effectively promote specificity differentiation, towards cartilage cells, of DPSCs. Based on the differentiation inducing culturing liquid, the provided method ofchondrogenesisdifferentiation for the DPSCs subjected to in-vitro inducing culturingcan successively achieve chondrogenesis differentiation inducing on the DPSCs.

The invention discloses a method for establishing an osteoarthritis osteoclast-like cell model of mesenchymal stem cells after directional cartilage differentiation through a two-step method. The method comprises the steps that firstly, the mesenchymal stem cells are induced to be subjected to directional differentiation into articular cartilage cells, and then the articular cartilage cells are induced by adopting IL-1beta in-vitro induction to establish the osteoarthritis model. According to the method, the two-step method is used for establishing the osteoarthritis model after directional cartilage differentiation for the first time, and by exploring the cartilage cell morphology and expression change of phenotype genes aggrecan and Co12alpha1, the optimal use concentration and cell induction time of a solution are determined. The method is easy to operate and low in cost and can be applied to related studies such as cell quality evaluation of the mesenchymal stem cells after directional cartilage differentiation, early warning of easy infection of adult osteoarthritis, verification of osteoarthritis drug action targets and screening of drug toxicity/drug functions.

The invention discloses application of atler stem cell exosome in preparation of products for improving or treating osteoarthritis and delaying cell senescence. The invention particularly discloses application of a velvet antler-derived stem cell exosome in preparation of products for preventing, improving or treating individual osteoarthritis and application thereof in preparation of products for delaying cell senescence. The cell exosome has a stable treatment effect, and can inhibit or reduce the expression of inflammatory factors; the grip strength of arthritis mice is enhanced, and the motion function is recovered; the bone density of a joint area is enhanced, so that the mechanical capacity of a skeleton structure is enhanced, and the symptom of osteoarthritis is improved; cartilage injury in the joint area is relieved; the growth and differentiation of cartilage cells are effectively promoted, and the damage and injury of soft tissues are relieved; the composition can effectively improve and treat osteoarthritis, has the effect of delaying senescence of human mesenchymal stem cells, and has wide application prospects in the fields of osteoarthritis treatment and cosmetics.

The invention relates to the technical field of biology, in particular to an application of alpha-ketoglutaric acid in preparation of drugs, and the drugs are used for 1) treating osteoarthritis and related diseases; and/or, 2) inhibiting the decomposition phenotype of cartilage cells; and/or 3) promoting synthetic phenotypes of cartilage cells; and/or 4) promoting skin hair follicle regeneration. The pharmaceutical composition provided by the invention can protect cartilage tissues and prevent the progress of osteoarthritis, and has great potential application value for clinical treatment of osteoarthritis. In addition, the medicine provided by the invention can promote obvious increase of skin hair follicles, and also has great potential application value in treatment and improvement of alopecia.

The invention relates to application of 2-aminoethoxy diphenyl borate in preparation of a medicine for treating osteoarthritis, and belongs to the technical field of biological medicines. According tothe invention, an apoptosis model is constructed on primary rat articular cartilage cells to simulate cartilage cell damage after osteoarthritis. The invention finds that 2-APB with different concentrations can obviously recover the cell viability and mitochondrial membrane potential level of apoptotic chondrocytes and reduce LDH leakage rate and ROS release, and can reduce the cartilage cell apoptosis by inhibiting IHH/Bcl-2/Bax signal transduction pathway, such that the related research on the cartilage cell protection mechanism is further supplemented and enriched, and the more scientificbasis is provided for the research and the development of new drugs for treating osteoarthritis.