Stem cell exosome composition for treating knee osteoarthritis

A technology of exosomes and stem cells, which is applied in the field of cell engineering, can solve the problems of easy loss of single cells and affect the function of cells, and achieve the effects of stable exosomes, easy quality control, and avoiding pollution

Inactive Publication Date: 2020-12-01
JINAN PANSHENG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct injection of a single mesenchymal stem cell into the joint cavity to treat knee osteoarthritis found that a single cell is easily lost, and the local microenvironment also affects the function of the cells

Method used

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  • Stem cell exosome composition for treating knee osteoarthritis
  • Stem cell exosome composition for treating knee osteoarthritis
  • Stem cell exosome composition for treating knee osteoarthritis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033]Example 2 Culture of Umbilical Cord Mesenchymal Stem Cells in a Hypoxic Environment

[0034] Harvest the umbilical cord mesenchymal stem cells cultured to P2 in Example 1.

[0035] When the cell confluency reaches 80%, subculture, discard the medium, add PBS to wash twice, add 2 mL of trypsin to digest the cells for 1 min, observe the cells shrinking and rounding under the microscope, add fresh medium to stop digestion, and count on a hemocytometer according to Passage at a density of 80 million / cm2, and inoculate T150 bottles.

[0036] The cells were divided into two groups, which were respectively placed in a normoxic incubator and a three-gas incubator (5% oxygen concentration) to continue culturing. The difference in cell morphology between the two groups was observed under a microscope, and it was found that the cells in the hypoxic environment were smaller than those in the normal oxygen environment (such as image 3 In A), the cell proliferation is faster (such ...

Embodiment 3

[0038] Example 3 Extraction and Identification of Stem Cell Exosomes

[0039] The P3 generation cells passaged in Example 2 were selected for passage, and the P4 generation cells were collected for extraction and identification of exosomes.

[0040] 1. Fetal bovine serum (FBS) to remove exosomes: Use an ultra-high-speed centrifuge, 100,000g, 4°C, centrifuge for 8-12h, remove the exosomes contained in FBS, take the supernatant after centrifugation and store it at 4°C for later use. Labeled No-exo-FBS.

[0041] 2. Prepare medium: pipette No-exo-FBS into a 50ml centrifuge tube, add α-MEM to prepare a complete medium containing 10% No-exo-FBS.

[0042] 3. Digest and harvest the P3 cells cultured in the hypoxic state, use the No-exo-FBS complete medium to inoculate the cells, record it as P4, and place it in a three-gas incubator (oxygen concentration is 5%) to continue culturing.

[0043] 4. After culturing for 48 hours, collect the cell supernatant.

[0044] 5. Centrifuge at 3...

Embodiment 4

[0051] The preparation of embodiment 4 autologous PRP

[0052] 1. Blood drawing: Healthy volunteers with no infectious diseases or blood system diseases, venous blood platelet count greater than 100 000 / μl, no aspirin or other drugs that affect platelet function 3 months before blood sampling, and normal blood routine examination. Sign the informed consent form and agree to blood collection for this experiment. Under sterile conditions, 30 mL of peripheral venous blood was collected from donors using negative pressure blood collection tubes containing sodium citrate anticoagulant.

[0053] 2. Two-step method: transfer 30mL whole blood to a 50mL centrifuge tube with a disposable sterile pipette, first centrifuge at a low speed of 100×g, 20°C for 10min, collect all the plasma layer and buffy coat layer and transfer to another new tube. Then, centrifuge at 400×g at high speed for 10 minutes at 20°C to further concentrate PRP and separate the platelet-poor plasma fraction. Discar...

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Abstract

The invention discloses a stem cell exosome composition for treating knee osteoarthritis. The main component of the composition is exosome derived from stem cells, the exosome is combined hyaluronic acid or PRP to treat knee osteoarthritis, and the composition is more stable and can effectively treat knee osteoarthritis.

Description

technical field [0001] The invention relates to a stem cell exosome composition for treating knee osteoarthritis, belonging to the field of cell engineering. Background technique [0002] Knee Osteoarthritis (KOA) is a common chronic joint disease, also known as degenerative arthritis, characterized by primary or secondary degeneration of articular cartilage and bone hyperplasia. It is common in middle-aged and elderly people and mainly affects knee cartilage, bone and synovial tissues. During the onset, patients will experience joint pain, swelling, deformation, and in severe cases, knee joint deformity. Epidemiological data show that the incidence rate of osteoarthritis in China is about 10%, and there are about 150 million patients, of which about 50% are patients with knee osteoarthritis. With the aging population worldwide, the incidence of knee osteoarthritis is increasing year by year. At present, there are many methods for clinical treatment of patients with knee ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K35/28A61K35/16A61K35/19A61P19/02A61P29/00A61P19/08C12N5/0775A61K31/728
CPCA61K31/728A61K35/16A61K35/19A61K35/28A61P19/02A61P19/08A61P29/00C12N5/0668A61K2300/00
Inventor 张子安邢志青陈莉周健李冬丽赵方方
Owner JINAN PANSHENG BIOTECH
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