Medicine for improving immunity in a microgravity environment and screening method thereof
A screening method and immunity technology, applied in biochemical equipment and methods, drug combinations, pharmaceutical formulations, etc., to achieve rapid screening, simple operation process, and mild implementation conditions
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Embodiment 1
[0018] Example 1 Screening Polysaccharide Mixture Using Human Peripheral Blood Mononuclear Cells as Seed Cells
[0019] (1) Separation of human peripheral blood mononuclear cells by density gradient centrifugation
[0020] The heparinized anticoagulated blood was diluted one-fold with Hanks solution, spread lightly on Ficoll separation medium (specific gravity 1.077g / mL), and then centrifuged horizontally at 2000rpm for 30min. Mononuclear cells are suspended in the upper layer of the separation medium and appear as a white film. Carefully draw the mononuclear cell layer with a pipette, add Hanks solution and wash 3 times. Add RPMI-1640 medium containing 10% fetal bovine serum for routine culture.
[0021] (2) The prepared human peripheral blood mononuclear cell suspension (the total number of cells is 1 × 10 7 ) were cultured in a 50 mL rotary bioreactor, and phytolectin A (PHP-A) at a concentration of 20 μg / mL was added at the same time.
[0022] (3) Mix Astragalus Polysa...
Embodiment 2
[0024] Example 2 Screening Polysaccharide Mixture Using Mouse Bone Marrow Mononuclear Cells as Seed Cells
[0025] (1) Separation of mouse bone marrow mononuclear cells by density gradient centrifugation
[0026] Take the femur of the dead mouse, put the femur into sterile cold PBS; use a 1mL syringe to flush out the cells in the mouse femur until the femoral cavity is white; mix the cells well, use a 200-mesh filter to filter, collect and filter Liquid in a 10mL centrifuge tube, 1500rpm. Centrifuge for 5 minutes; discard the supernatant, add 8 mL of NH4Cl-Tris solution, suspend the cells, dissolve the red blood cells for about 6 minutes, centrifuge at 1500 rpm for 5 minutes. Discard the supernatant, add 5mL sterile cold PBS to the centrifuge tube, and resuspend the cells; gently add the above cell suspension to 5mL Ficoll-paqul (1.086g / mL), centrifuge at 1500rpm for 30min; carefully take out the centrifuge tube, the solution Divided into three layers: transparent PBS layer,...
Embodiment 3
[0030] Example 3 Screening Polysaccharide Mixture Using Mouse Spleen Lymphocytes as Seed Cells
[0031] (1) Separation of mouse spleen lymphocytes by density gradient centrifugation
[0032] The spleen tissue of the dead mouse was taken, placed in sterile cold PBS, then the spleen was cut into pieces, filtered through a 200-mesh filter, and the filtrate was collected in a 10mL centrifuge tube at 1500rpm. Centrifuge for 5 minutes; discard the supernatant, add 8 mL of NH4Cl-Tris solution, suspend the cells, dissolve the red blood cells for about 8 minutes, centrifuge at 1500 rpm for 5 minutes. Discard the supernatant, add 5mL sterile cold PBS to the centrifuge tube, and resuspend the cells; gently add the above cell suspension to 5mL Ficoll (1.086g / mL), centrifuge at 2000rpm for 15min; carefully take out the centrifuge tube, and divide the solution into Three layers: from top to bottom are transparent PBS layer, mononuclear cell layer, and RBS layer; use a thin pipette with a l...
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