118 results about "Wharton's jelly" patented technology

In one aspect, the invention is directed to methods of expanding hematopoietic stem cells (HSCs) comprising culturing the HSCs with Wharton's Jelly mesenchymal stem cells (WJSCs), a cell culture medium that has been conditioned with WJSCs, or a combination thereof, thereby producing a HSC culture; and maintaining the HSC culture under conditions in which the HSCs expand in the culture, thereby expanding the HSCs. In another aspect, the invention is directed to a method of transplanting the expanded HSCs in an individual in need thereof. In yet another aspect, the invention is directed to compositions comprising HSCs and Wharton's Jelly mesenchymal stem cells (WJSCs). The composition can further comprise a cell culture medium that has been conditioned with WJSCs.

The invention relates to a separation method and a culture method for umbilical cord mesenchymal stem cells. The separation method comprises the following steps: thoroughly cleaning umbilical cord tissue of a healthy newborn by using a PBS (phosphate buffer solution) containing streptomycin and penicillin, and removing blood; shearing the umbilical cord into small sections uniform in length, and mechanically separating, bluntly stripping Wharton' s jelly, and removing umbilical arteries and umbilical veins; uniformly shearing the Wharton' s jelly; re-suspending the sheared Wharton' s jelly through an MSCs (mesenchymal stem cells) culture medium, inoculating to a culture dish with laid gelatin, and putting in a CO2 culture box for cultivation; conducting centrifugal separation to obtain tissue blocks and a cell resuspension solution. The culture method comprises the following steps: enwrapping the culture dish, discarding the gelatin, and washing with the PBS; inoculating the separated out tissue blocks and the cell resuspension into the culture dish; performing digestive subculture after cell fusion growth rate reaches 80-90%.

The present invention relates to populations and compositions of stem and progenitor cells derived from the umbilical cord, and methods of obtaining the same. In some embodiments, one or more entire umbilical cords or sections thereof are subjected to a process where a cell population is derived without prior removal of any blood vessel. The population may be derived using mechanical and chemical means. The presently disclosed process may be applied to a single umbilical cord or to a plurality of umbilical cords, for example, as a batch process. Optionally, this process includes removing some or all cord blood before deriving the population. In some embodiments, presently disclosed cell populations include mesenchymal stem cells derived from Wharton's jelly and endothelial progenitor cells derived from a wall of a blood vessel of an umbilical cord. Optionally, the cell population includes stem cells derived from cord blood. The presently disclosed cell populations and compositions may be banked and/or used in a number of clinical or other applications. Exemplary applications include but are not limited to applications related to regenerative medicine, for screening compounds, for research, and for gene therapy.

The invention relates to cryopreservation protection liquid for Wharton jelly tissues of a human umbilical cord. The cryopreservation protection liquid comprises 5-10 percent of a permeable cryoprotectant, 1-5 percent of a non-permeable cryoprotectant, 10-20 percent of a knockout serum replacement and 70-80 percent of a serum-free basal culture medium. The invention also discloses a preparation method of the cryopreservation protection liquid. The preparation method specifically comprises the steps of (1) precooling the serum-free basal culture medium, the non-permeable cryoprotectant and the knockout serum replacement, mixing and uniformly shaking; (2) adding the permeable cryoprotectant; and (3) performing refrigeration under a temperature condition of 2-6 DEG C for more than 30min. The invention also discloses a cryopreservation method for the Wharton jelly tissues of the human umbilical cord by the cryopreservation protection liquid. The cryopreservation method comprises the following steps of (1) pretreating the umbilical cord; (2) peeling off the Wharton jelly tissues; and (3) cryopreserving the Wharton jelly tissues of the human umbilical cord. The cryopreservation protection liquid and the cryopreservation method which are used for treating the Wharton jelly tissues of the human umbilical cord have the advantages that injury to umbilical cord mesenchymal stem cells in a cryopreservation process can be alleviated, so that the activity and the clinical use safety of the umbilical cord mesenchymal stem cells are guaranteed.

Provided herein are methods and kits for the isolation, processing and cryopreservation of mesenchymal cells from the Wharton's Jelly and vascular progenitor cells from umbilical cord tissue. Also provided are isolated mesenchymal cells or vascular progenitor cells obtained by the invention methods, and compositions thereof.

The present invention provides compositions and formulations of micronized Wharton's jelly having a controlled viscosity such that when delivered to the injured region of a subject, it remains substantially localized with little or no migration out of the injured region for the repair and/or regeneration thereof. Micronized Wharton's Jelly can be suspended in a pharmaceutically acceptable aqueous carrier, such as saline, sterile water, or any suitable buffer, to form a suspension or a gelatinous gel composition, or it can be in the form of a paste, suitable for delivery into the space adjacent the articular surface cartilage injured region of a subject. The micronized Wharton's jelly when employed at sufficient concentrations can be hydrated into a gel or paste and administered topically, or it can be injected into the body through the use of a needle and syringe. Accordingly, micronized Wharton's Jelly, compositions, or formulations thereof, can be delivered in a manner that is more convenient than Wharton's jelly that has not been micronized in accordance with the present invention.

The invention discloses a method for isolation and serum gradient switching culture of human umbilical cord mesenchymal stem cells. The method comprises the following steps: digesting human umbilical cord with collagenase I until Wharton's jelly is fully digested, collecting digested single cells, inoculating the single cells into alpha-MEM medium, carrying out suspension culture until 80-90% of cells are fused, and digesting with trypsin; inoculating the suspension of trypsin-digested cells into alpha-MEM medium, carrying out suspension culture until 80-90% of cells are fused, digesting with trypsin, subcuturing and inoculating the subcultured cells into alpha-MEM medium, and carrying out subculture repeatedly. The concentration of fetal bovine serum in alpha-MEM medium in the steps of subculture decreases with the increase of the passage number until fetal bovine serum disappears. According to the method, the material human umbilical cords are easily accessible; the preparation of human umbilical cord mesenchymal stem cells is rapid and safe, and is not subject to ethical restrictions; and the subsequent culture is independent on the characteristics of fetal calf serum, resulting in greatly reduced culture cost and risk in clinical use. The method of the invention has a good application prospect.

Viable progenitor cells are extracted from frozen umbilical cord tissue. In embodiments, the umbilical cord tissue is a blood vessel bearing perivascular Wharton's jelly, and the extracted progenitor cells are HUCPVCs.

The invention discloses freezing storage protective solution for a human umbilical Wharton's jelly tissue block. 1 liter of the freezing storage protective solution comprises 0.8 to 1.2 mol of glycol, 0.4 to 0.6 mol of dimethyl sulfoxide, 0.1 to 0.3 mol of cane sugar, 100 to 200 milliliters of cord blood autoserum and the balance of culture solution DMEM/F12. In the freezing storage protective solution, the cord blood autoserum and the culture solution DMEM/F12 serve as base solution to provide nutrient for the tissue block, so osmotic equilibrium inside and outside cells is guaranteed, the cell environment in the tissue block is guaranteed to be similar to the in vivo environment, and the freezing storage effect is good; the low-concentration glycol and dimethyl sulfoxide serve as a permeability freezing protective agent, so the toxicity of the freezing storage protective solution to the cells is reduced; and the cane sugar serves as a non-permeability freezing protective agent, so the viscosity of the solution is increased and the osmotic pressure inside and outside cell membranes is relieved when the cells are frozen and stored. The human umbilical Wharton's jelly tissue block can be directly frozen and stored by the freezing storage protective solution, so the freezing storage effect is good, the cell damage is little, and high-quality human umbilical mesenchymal stem cells can be provided for clinic.

Therapeutic preparations for rejuvenation and anti-aging of human skin incorporates Wharton's Jelly or substantial fractions thereof as an active ingredient.

The invention provides a method for rapidly separating and extracting hUC-MSC (human Umbilical Cord mesenchymal stem cells). The method comprises the following steps: taking the freshly collected umbilical cord tissue of a healthy newborn baby, carrying out on-ice transportation on the freshly collected umbilical cord tissue in umbilical cord storage transportation liquid containing double antibodies, carrying out cleaning and disinfection by adopting 75% alcohol and normal saline, removing blood vessels, carrying out blunt dissection on wharton jelly, carrying out mechanical pulverization, treating the obtained product I by adopting red blood cell lysis buffer for 3 min, digesting the obtained product II by adopting IV collagenase, screening the obtained product III by adopting a 100-200-mesh sieve, carrying out suspension culture on the obtained product IV by adopting a serum-free medium, wherein the liquid is changed every 3-5 days, taking supernatant, detecting cell pollution, after the adherent rate in a plate reaches 30-70%, carrying out trypsinization, carrying out centrifugation, collecting cells, carrying out passage amplification, carrying out merging when the cell merging rate reaches 90% or above, collecting the cells, carrying out cryopreservation on the cells, and detecting the biological characteristics of hUC-MSC.

The invention discloses a method for preparing and preserving umbilical arterial and vein vascular peripheral stem cells. The umbilical arterial and vein vascular peripheral stem cells are cultured by a cell culture fluid (DMEM low glucose, 10% of fetal calf serum and 1% of penicillin-streptomycin double anti-body). The operation is carried out under strict aseptic conditions; and after umbilical cord collection, the inconvenience caused by blood coagulation is effectively avoided by use of an anticoagulant. Compared with a conventional coating method, the method disclosed by the invention has the advantages that umbilical perivascular sourced mesenchymal stem cells with higher purity are obtained; allergic reaction and cross infection caused by animal-based protein can be avoided since digestive enzymes are not adopted; and the umbilical perivascular stem cells separated by a non-zymogen digestion method have higher positive rate than that of the Wharton's jelly sourced mesenchymal stem cells.

The present invention relates to a biomaterial, specifically a hydrogel, based on the extracellular matrix of the umbilical cord for its application in regenerative medicine. The invention particularly relates to a biomaterial made up of glycosaminoglycans present exclusively in the Wharton's jelly of the umbilical cord (which can optionally be combined with cells as a combination therapy), and also to the methods for the production and use thereof.

The invention relates to the technical field of cell culture and cell separation and in particular discloses a preparation method for improving the yield of umbilical cord derived mesenchymal stem cell primary cells. On the basis of culturing and separating mesenchymal stem cells on a traditional Wharton's jelly tissue block in a disposable adherence manner, Wharton's jelly tissue blocks are finely collected at different time of a later period of culture and are repeatedly adhered; P0 generation mesenchymal stem cells can be continuously collected at different time. According to the method provided by the invention, the utilization rate of Wharton's jelly is maximized through a property that the mesenchymal stem cells continuously move out from Wharton's jelly tissues to grow; compared with Wharton's jelly tissue block disposable adherence culture, the obtained quantity of the P0 generation mesenchymal stem cells can be increased by two times at least; the culture density of the mesenchymal stem cells, the concentration of serum replacements in a culture medium and the culture time are subsequently controlled; when the cells are sub-cultured to a P3 generation, the obtained cell quantity can completely meet the requirements of cell storage and clinical transplantation.

The invention discloses a method for acquiring bioactive proteins by utilizing umbilical cord mesenchymal stem cells. The method comprises the following steps: digesting Wharton's jelly of umbilical cord in short time by using type I collagenase, thereby obtaining a paste mixture containing extracellular matrix proteins and tissue blocks; performing primary culture; adding a stem cell growth culture medium into a packed bed type bioreactor for amplifying the umbilical cord mesenchymal stem cells; adding a protein production culture medium for performing continuous culture when the cell fusion rate in the reactor reaches the standard; collecting the culture solution, and treating the solution, thereby obtaining the bioactive proteins. According to the method for acquiring the bioactive proteins by utilizing umbilical cord mesenchymal stem cells disclosed by the invention, the purity of the obtained umbilical cord mesenchymal stem cells is high, the multiplication capacity is high, and the stem cell culture time is shortened; and moreover, the yield of the obtained bioactive proteins is high, the quality control process is convenient, and large-scale production is easily realized. The stem cells and bioactive proteins do not contain animal source components, and the safety of clinical application is improved.

The invention provides cryopreserved protection liquid of human umbilical cord watton's gum tissues, and preparation and application thereof. The electrolyte concentration inside and outside cells arerespectively balanced through a permeating protection agent and a non-permeating protection agent; meanwhile, the free water content is reduced; the formation of ice crystals is reduced; on one hand,the cell damage caused by cell excessive dehydration due to external high-permeation environment can be avoided; on the other hand, the physical damage of the ice crystals on the cells can be reduced; a protein composition is added, so that the required nutrients can be provided for the cells; the cell survival rate is improved; lyophilic colloids can form thixotrope in the water, so that the distribution of all ingredients in the permeating protection agent is uniform; the cells can be uniformly dispersed; precipitates cannot easily occur; in addition, the taking, the use and the storage areeasy. Through the combined use of the ingredients, the activity and the stress resistance of the watton's gum tissues can be effectively improved; the survival rate of the cells during cryopreservation and recovery can be improved; the cell activity loss due to cryopreservation is reduced.

Noncultured Wharton's Jelly stem cells and methods of their purification, storage and use are provided.

The invention provides a method and system for separating, culturing and amplifying human umbilical cord mesenchymal stem cells. The method comprises the following steps: step I, pretreating a sample; step II, obtaining Wharton's jelly, cutting the obtained Wharton's jelly into small tissue, and adding a filtered red blood cell lysis buffer solution of which the volume is 3.5 times that of the small tissues; step III, digesting collagenase, wherein a digestion solution is a balanced salt solution containing 1% of IV type collagenase, 0.5% of hyaluronidase, 300U/ml DNA enzyme and 2% of a serum substitute; step IV, performing primary cell isolated culture: adding a serum-free culture medium of mesenchymal stem cells to obtain a cell suspension, and adding a special primary cell culture solution for umbilical cord mesenchymal stem cells for primary culture; step V, subculturing the cells, and inoculating the collected cells according to 5000 cells/cm < 2 > by using trypsin with the mass percent concentration of 0.215%; and step VI, collecting the umbilical cord mesenchymal stem cells, and performing osteogenic differentiation, adipogenic differentiation and chondrogenic differentiation experiments.