Preparation method and application of autologous natural killer cell proliferation
A technology of natural killer cells and cells, applied to cells modified by introducing foreign genetic material, using vectors to introduce foreign genetic material, recombinant DNA technology, etc., can solve the problems of long culture time, low killing function of NK cells, telomerase activity Lowering and other issues
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[0036] The invention relates to a preparation method for proliferation of autologous natural killer cells, which is characterized in that K562 cells transfected and stably expressed by PDK1 and CD122 and interleukin 2 are used to amplify and activate the natural killer cells, so that the natural killer cells can proliferate in large quantities.
[0037] The K562 cell line of the present invention is transfected with an expression vector that stably expresses 3-phosphoinositide-dependent protein kinase 1 and CD122. The vector contains a viral promoter and a selection marker gene, and PDK1 and CD122 polypeptides on the K562 cell membrane can be obtained , K562 cells still stably express 3-phosphoinositide-dependent protein kinase 1 and CD122 after culture and proliferation. The cells expressing 3-phosphoinositide-dependent protein kinase 1 and CD122 on the cultured K562 cell membrane are collected by strong acid, strong alkali and / or irradiation, and high-speed centrifugation for...
Embodiment 1
[0061] Preparation of transfected K562 cell line stably expressing PDK1 and CD122
[0062] The K562 cell line is used to transcribe and stably express the expression vector of PDK1 and CD122. The vector contains a viral promoter and a selection marker gene; when the exogenous expression vector enters the host cell, activate the promoter, and cultivate the K562 cell for a period of time, the cell membrane can be obtained 3-Phosphoinositide-dependent protein kinase 1 and CD122 polypeptide on the cultured K562 cell membrane with cells expressing PDK1 and CD122, collected by strong acid, strong alkali and / or irradiation, and by high-speed centrifugation to collect K562 cells Purified collection.
Embodiment 2
[0064] Preparation of autologous natural killer cells
[0065] Collect 30ml of patients with advanced breast cancer and normal healthy people (with informed consent), add an equal amount of 1×PBS to dilute, gently superimpose on the lymphocyte separation medium along the wall of the centrifuge tube to form a clear interface, and centrifuge at 2000rpm for 20min at room temperature , Aspirate the PBMCs in the interface layer and wash twice with 1×PBS (pH 7.4). After counting orchids, use CellGro SCGM to adjust the concentration of mononuclear cells to 1×10 7 / ml.
[0066] K562 cells stably expressing 3-phosphoinositide-dependent protein kinase 1 and CD122 were first co-cultured with natural killer cells for 5 days, and the dosage ratio of K562 cells to lymphocytes was the number of K562 cells: the number of mononuclear cells = 1:5 .
[0067] After 5 days of co-cultivation, the natural killer cells were aspirated into a new culture bottle with a 5 mL pipette, and 20 mL of fres...
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