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Tissue cryopreservation liquid capable of maintaining cell activity

A technology for freezing liquid and tissue blocks, applied in the biological field

Active Publication Date: 2013-02-06
WUXI CELLULAR BIOPHARM GRP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Under the premise that the freezing speed and thawing speed of the first two factors are limited by the current technological conditions and cannot be greatly improved in a short period of time, the correct selection and application of cryoprotectants has become the most critical factor in determining the effect of cryopreservation

Method used

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  • Tissue cryopreservation liquid capable of maintaining cell activity
  • Tissue cryopreservation liquid capable of maintaining cell activity
  • Tissue cryopreservation liquid capable of maintaining cell activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] cryopreservation of adipose tissue

[0088] Experimental Materials

[0089] Adipose tissue: take 20ml of fresh sterile adipose tissue from the operating room

[0090] Freezing solution: KSR solution of 80vol%KSR+10vol%DMSO+10vol% trehalose, wherein the concentration of the KSR solution of trehalose is 2mol / l.

[0091]Experimental group

[0092] Panel A: cells were extracted from fresh adipose tissue and cultured

[0093] Group B: cells were extracted from frozen adipose tissue and cultured

[0094] experimental method

[0095] (1) Processing of fresh adipose tissue

[0096] Place the fresh adipose tissue in a sterile bottle under aseptic conditions, and wash with DPBS or saline for 3-4 times to remove the miscellaneous cells on the surface of the adipose tissue. Then use sterilized scissors to cut the tissue pieces (approximately 1mm 3 size) to facilitate cryopreservation of tissues.

[0097] The shredded tissues were equally divided into two groups, group A and...

Embodiment 2

[0105] Recovery and inoculation of adipose tissue

[0106] After 3 months, the cryopreservation tube containing the frozen adipose tissue was quickly placed in a 37°C water bath. After the tissue was dissolved, the tissue was taken out, and the residual cryopreservation solution was washed with DMEM (Sigma Company). Inoculate the resuscitated tissue into a culture flask of the same size and specification as Group A, add culture medium, and place at 37°C, CO 2 cultured in an incubator. Tissues were inoculated, and the tissue was completely changed after 3 days. The adherent growth of cells was observed under a microscope. Also make a record every 3 days and take pictures. The result is as figure 2 shown. After 3 days, no adherent cells were found; after 6 days, very few adherent cells were found, and the adherent cells were long spindle-shaped; after 9 days, the amount of adherent cells increased, and the cells grew well; after 12 days, there were many adherent cells, and...

Embodiment 3

[0113] Flow cytometry detection

[0114] The above-mentioned cryopreserved P3 generation cells were taken, and after thawing, they were made into a cell suspension, and flow cytometric detection was performed to determine that the obtained cells were adipose-derived mesenchymal stem cells, and the cells were identified in terms of cell purity. Specifically, the cells were taken to make a cell suspension, and the density was adjusted to 1×10 5 mL -1 , Centrifuge at 800r / min (120g) for 5min, discard the supernatant, wash the resuspended cells with cold D-Hanks at 4°C, centrifuge the cell suspension again at 800r / min for 5min, and discard the supernatant. Then the cells were resuspended to 1 mL with D-Hanks, antibodies were added, and cell surface markers were detected by flow cytometry. The added antibodies were: human anti-CD29, CD73, CD49d, CD90, CD14, CD45, CD34, Actin and HLA-DR. The result is as image 3 and shown in Table 2. Among them, CD29, CD73, CD49d, and CD90 are...

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PUM

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Abstract

The invention provides tissue cryopreservation liquid capable of maintaining cell activity, comprising trehalose, dimethyl sulfoxide, and serum substitute KSR (knockout serum replacement). After resuscitation of tissue preserved with the inventive cryopreservation liquid, the obtained adipose-derived stem cells (ADSCs) have the advantages of good anchorage growth, high purity, and strong differentiation ability.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a tissue cryopreservation solution capable of maintaining cell activity. Background technique [0002] Low-temperature cryopreservation is an effective method for long-term preservation of living tissues. It mainly protects by reducing the metabolic rate of cells. Frostbite is the biggest negative reaction of low-temperature protection. The reason may be mechanical damage and permeability caused by ice crystals. damage. At present, there are mainly two methods for tissue cryopreservation: fast freezing method, namely vitrification method; slow freezing method, namely programmed cooling method. Slow freezing is more commonly used. However, if proper cryopreservation methods and appropriate cryoprotectants are not adopted, tissues are prone to frostbite during cryopreservation [0003] Ultra-low temperature cryopreservation is a preservation method that almost completely stops the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N1/02
Inventor 曹卫张丽张露亿赵光宇李玉娟
Owner WUXI CELLULAR BIOPHARM GRP LTD
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