Method for purifying fat cells and precursor cells thereof and application thereof

A technology of precursor cells and adipocytes, applied in the biological field, can solve the problems of unsatisfactory clinical application, clinical and research needs, and low cell yield

Inactive Publication Date: 2020-11-06
杨嘉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cut and adherent method uses cells to migrate out of the tissue block to separate, and single cells cannot be separated immediately, and are affected by factors such as the age and health of the donor, and the separation cycle is long
The shearing digestion method can quickly obtain single cells through the action of digestive enzymes; however, the traditional digestion method will affect the activity and integrity of the adipose-derived precursor cells, resulting in low cell survival rate and low cell yield. Unable to meet the follow-up clinical application
[0003] The above existing technical solutions all have some disadvantages. They cannot quickly separate and obtain high-quality and large amounts of adipose-derived precursor cells. The cells do not have higher proliferation ability and cell activity, and cannot meet the downstream clinical and research needs. It is urgent to invent a A technical solution for the separation of adipose-derived precursor cells that achieves high-efficiency separation and can obtain higher purity and activity to solve the above technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Obtain 0.3cm from the human skin 3 The adipose tissue block was labeled as human adipose tissue 001, resuspended in DMEM F / 12, and placed in a 4°C refrigerator for processing.

[0030] 2) Before the separation of adipose-derived precursor cells, the adipose tissue was rinsed with 75% alcohol for 1 second, and the outer packaging was wiped clean.

[0031] 3) The operation was performed in a biological safety cabinet, and the adipose tissue was washed with normal saline for at least 3 times in sequence.

[0032] 4) Discard the normal saline, move the adipose tissue to a clean culture dish, add 1mL of red blood cell lysate and DMEM F / 12 mixed solution, wash the adipose tissue 3 times, 5 minutes each time, and cut up the adipose tissue; The mixing ratio of lysate and DMEM F / 12 is 1:1 by volume.

[0033] 5) According to 10 times the volume, use the mixture of red blood cell lysate and DMEM F / 12 to resuspend the chopped adipose tissue, transfer it to a clean centrifuge t...

Embodiment 2

[0043] 1) Obtain 1 cm from human subcutaneous 3 The adipose tissue block was labeled as human adipose tissue 002, resuspended in DMEM F / 12, and placed in a 4°C ice box for processing.

[0044] 2) Before the separation of adipose-derived precursor cells, the adipose tissue was rinsed with 75% alcohol for 30 seconds, and the outer packaging was wiped clean.

[0045] 3) The operation was performed in a biological safety cabinet, and the adipose tissue was washed with normal saline for at least 3 times in sequence.

[0046] 4) Discard the clean normal saline, move the adipose tissue to a clean culture dish, add 5mL of red blood cell lysate and DMEM F / 12 mixed solution, wash the adipose tissue 3 times, 5 minutes each time, and cut up the adipose tissue; red blood cells The mixing ratio of lysate and DMEM F / 12 is 1:1 by volume.

[0047]5) According to 10 times the volume, use the mixture of red blood cell lysate and DMEM F / 12 to resuspend the chopped adipose tissue, transfer it to...

Embodiment 3

[0057] 1) Obtain 3 cm from monkey skin 3 The adipose tissue block was labeled as monkey-derived adipose tissue 001, resuspended in DMEM F / 12, and placed in a 4°C refrigerator for processing.

[0058] 2) Before the separation of adipose-derived precursor cells, the adipose tissue was rinsed with 75% alcohol for 15 seconds, and the outer packaging was wiped clean.

[0059] 3) The operation was performed in a biological safety cabinet, and the adipose tissue was washed with normal saline for at least 3 times in sequence.

[0060] 4) Discard the clean normal saline, move the adipose tissue to a clean culture dish, add 3 mL of red blood cell lysate and DMEM F / 12 mixed solution, wash the adipose tissue 3 times, 5 minutes each time, and cut up the adipose tissue; The mixing ratio of lysate and DMEM F / 12 is 1:1 by volume.

[0061] 5) According to 10 times the volume, use the mixture of red blood cell lysate and DMEM F / 12 to resuspend the chopped adipose tissue, transfer it to a clea...

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PUM

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Abstract

The invention relates to a method for purifying fat cells and precursor cells thereof. From fat tissue blocks of a human body or a mammal, after cleaning is carried out by mixed solution of a red blood cell lysis buffer and DMEM F / 12, digestion is carried out by adopting tissue digestive juice, and after the steps of centrifugation, filtering processing and the like are carried out, the high-purity and high-activity fat-derived precursor cells can be efficiently separated and obtained from trace of fat tissues; separated fat-derived precursor cell culture solution has different types of cell nutritional factors with high concentration; and the obtained fat-derived precursor cells and a product thereof can be used for tissue repair.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for purifying fat cells and their precursor cells and their application for tissue repair. Background technique [0002] The current methods for isolating adipose-derived precursor cells mainly include the shearing digestion method, the shearing adherent culture method, and the suction method. In the above two methods, the adipose tissue is taken out, the tissue block is broken, and the cells are separated. Suction methods include negative pressure aspirator suction and syringe suction; relevant studies have shown that when collecting fat, the shredding method has the least damage to fat cells, the syringe method is in the middle, and the negative pressure liposuction method is the heaviest. The larger the size, the greater the damage to the fat cells. The shearing and adherent method separates cells through the migration of cells from the tissue block. Single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N5/077A61L27/38A61L27/50A61L27/60
CPCA61L27/3804A61L27/3895A61L27/50A61L27/60C12N5/0653C12N2509/00
Inventor 杨嘉
Owner 杨嘉
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