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A special culture medium for lung tumor organoids and a scaffold-free 3D culture method

A culture method and organoid technology, applied in 3D culture, culture process, tissue culture, etc., can solve the problems of poor culture effect, and achieve the effect of retaining heterogeneity, strong cell stemness, uniform and controllable size

Active Publication Date: 2021-07-20
浙江弘瑞医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a special culture medium for lung tumor organoids in view of the defects that there is no special culture medium and the culture effect is not good in the current lung tumor organoid culture

Method used

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  • A special culture medium for lung tumor organoids and a scaffold-free 3D culture method
  • A special culture medium for lung tumor organoids and a scaffold-free 3D culture method
  • A special culture medium for lung tumor organoids and a scaffold-free 3D culture method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Preparation of lung cancer primary cell organoids

[0042] 1. Tumor tissue acquisition from lung cancer patients

[0043] The tissues used to isolate primary tumor cells are mainly derived from tumor tissue samples obtained by surgical resection or biopsy of lung cancer patients. Patients were required not to have received any anti-tumor therapy.

[0044] For surgically resected tumor specimens, samples should be taken from parts of the tumor that are actively growing and have no necrotic degeneration, and paracancerous tissues should be removed, because the paracancerous tissues contain fewer tumor cells and have poor cell viability, which reduces the survival rate of cells.

[0045] (1) Fresh tissue acquisition and processing methods:

[0046] Fresh tissue pieces removed by surgery or fresh tissue samples obtained by biopsy should be processed and separated immediately. Since the tissue has just left the human body, the shape, vitality and metabolic charac...

Embodiment 2

[0088] Example 2 Cryopreservation of Primary Tumor Cells

[0089] The fresh or cryopreserved and revived primary tumor cells in Example 1, if they do not need to be prepared into organoids temporarily, they can be cryopreserved when the number of adherent cells reaches more than 80% and the growth status is good.

[0090] Aspirate the serum-free medium, then add 1mL TrypLE cell digestion solution to each well, shake gently for 20s to make it evenly cover the bottom of the well; after 20s, suck the TrypLE cell digestion solution, put the 6-well plate in the incubator and incubate for 1 -2min; then observe the state of the cells under a microscope, and when it is found that there is obvious contraction, you can add 2mL serum-free medium to stop the digestion; gently blow with a pipette to make the cells fall off (minimize the generation of air bubbles as much as possible); then the cells Transfer the suspension to a 15mL centrifuge tube, centrifuge at 1000rpm / min for 5min, remov...

Embodiment 3

[0092] Example 3 Preparation of A549 cell organoids

[0093] Digest the A549 cells cultured to 80% confluence, count them, and inoculate them into 96-well ultra-low adsorption 96-well U-shaped culture plates according to a certain ratio. After the cells were inoculated, add the special medium in Table 2, and put it in 37°C, 5% CO 2 cultured in an incubator.

[0094] 30 minutes after inoculation, the cells aggregate due to gravity, and within 24 hours they can form organoid spheres. After that, the cell spheres begin to assemble and become more and more compact. After 5-6 days, they stabilize and begin to increase in size. The complete medium was replaced once a day.

[0095] image 3 The organoids formed for A549 cells and the morphological changes during the culture process. It can be seen from the figure that the cells have aggregated 30 minutes after inoculation, and the degree of aggregation increased 1 day after inoculation, and formed a relatively compact spherical or...

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Abstract

The invention discloses a special culture medium for lung tumor organoids and a 3D culture method without support. The special culture medium is composed of the following components: FBS, double antibody, N-2, Noggin, B-27, EGF, FGF-10, Y‑27632, A 83‑01, SB202190, N‑Acetylcysteine, HEPES, Glutamax, IGF‑1, Hydrocortisone, Advanced DMEM / F12. The culture method is to resuspend the tumor cells in a low-serum medium, inoculate them into a culture vessel after purification, add the above-mentioned special medium, change the special medium once a day, and cultivate until the organoids are formed. The culture medium and the culture method of the present invention can realize the rapid generation of tumor organoids, and can be stably cultivated for a long time. The formed tumor organoid cells are spherical and regular, and the size is uniform and controllable, and the heterogeneity of the patient's tumor tissue can be well preserved in vitro. qualitative.

Description

technical field [0001] The invention relates to cell culture or tissue culture technology in the technical field of biomedicine, in particular to a special culture medium for lung tumor organoids and a scaffold-free 3D culture method. Background technique [0002] Due to the heterogeneity and variability of tumor cells, there are obvious individual differences in the sensitivity of tumors to various chemotherapy drugs. Many cancer patients are not sensitive to chemotherapy drugs, or gradually develop tolerance to drugs during chemotherapy, which leads to tumor recurrence or patient death. Moreover, this kind of drug resistance is difficult to predict before chemotherapy. The failure of chemotherapy and the continuous attempts of various chemotherapy regimens will lead to physical damage of patients, economic waste and loss of treatment opportunities. Shi JF et al. recently reported a multi-center retrospective study of lung cancer. The results showed that during the 10 year...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N5/09
CPCC12N5/0693C12N2500/32C12N2501/105C12N2501/11C12N2501/119C12N2501/15C12N2501/39C12N2501/405C12N2501/998C12N2513/00
Inventor 罗国安王义明范雪梅罗喆明
Owner 浙江弘瑞医疗科技有限公司
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