36 results about "Cytokine-induced killer cell" patented technology

The invention discloses a preparation method of human cytokine-induced killer cells, comprising the following steps: coating a cell culture flask with a coating buffer containing effective amount of fusion protein and human CD3 monoclonal antibody before culturing precursor cells of human CIK cells, and adding the human CD3 monoclonal antibody in the whole process of inducing and culturing the human CIK cells, wherein the fusion protein is human intercellular adhesion molecule-1 functional domain and human fibronectin functional domain fusion protein, and the concentration of the human CD3 monoclonal antibody in the cell culture solution is lower than the concentration of the human CD3 monoclonal antibody in the coating buffer. According to the invention, ex-vivo expansion efficiency of peripheral blood mononuclear cells and the proportion of CD3 / CD56 double positive cells in the CIK cells are significantly raised, the cytotoxicity activity of the CIK cells is enhanced, thus the effect of cellular immunity treatment is raised.

The invention discloses an efficient CIK amplifying method, in particular to a method for cell populations, namely cytokine-induced killer cells utilizing in-vitro cell factors for efficiently inducing mononuclear cell expressions CD3 and CD56 of peripheral blood, wherein the cell populations have killing functions. The cultivation method for the CIK efficiently expressing CD3+CD56 comprises the following steps that the peripheral blood of a healthy person or a patient is collected in a sterile mode, after the peripheral blood is diluted through a saline solution with the same volume, a Ficoll lymphocyte separating medium is used for separating mononuclear cells, in the CIK cell inducing process, CD3 monoclonal antibodies (CD3mAb), CD28 monoclonal antibodies (CD28mAb), interferon-gamma (IFN-gamma), interleukin-2(IL-2) and interleukin 1alpha (IL-1alpha) are added, cultivation is carried out for 13-16 days to obtain cells, a CIK cell preparation is prepared, and flow cytometry detection and microorganism detection are carried out. According to the CIK cultivation method, the CIK number can be increased to be 6*10<9> or over 6*10<9> in two weeks, the cell survival rate can be increased to be 99% or over 99%, and the double-positive proportion of the CD3+CD56+cells reaches 30% or over 30%.

The invention discloses an immunity enhancing reagent comprising AAVs carrying molecule encoding genes of antibodies at immunodetection points, wherein the immunodetection points are one or several from PD-1, PD-L1 and CTLA-4. The AAVs carrying the molecule encoding genes of the antibodies at different immunodetection points are combined with each other, T cells, natural killer cells, cytotoxic T lymphocytes or cell factor induced killer cells and other immune cells are infected in vitro, and the antibodies at the immunodetection points are expressed and secreted after the infected immune cells are fed back to bodies of patients suffering from tumors, so that the combination of receptors at the immunodetection points and ligands of the receptors is blocked, the transfer of an immunosuppression signal is effectively blocked, the immune tumor suppression microenviroment is destroyed, the immune cell killing capacity is improved, and furthermore the curative effect of adoptive immune therapy is improved.

A process for producing cytokine-induced killer cells, comprising the steps of (a) culturing a cell mass that contains cells capable of being differentiated into CD3-positive CD56-positive cells and / or CD3-positive CD56-positive cells in the presence of a CD3 ligand, (b) culturing the cell mass produced in step (a) in the absence of a CD3 ligand, and (c) culturing the cell mass produced in step (b) in the presence of a CD3 ligand; and others.

Disclosed are: a method for producing a cell mass containing a cytokine-induced killer (CIK) cell, which is characterized by comprising the step of culturing a cell mass containing a cell that can be differentiated into a CIK cell in the presence of a fragment of a fibronectin; and others.