Fusion protein, coding nucleic acid, cell and application
A technology of fusion protein and nucleic acid, which is applied in the field of immunosuppressants to relieve immunosuppression, can solve the problems of slow disease progression and achieve the effect of enhancing anti-tumor function
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[0043] The preparation method of the cell of the present invention is not particularly limited. In an exemplary preparation method, the preparation method of the cell of the present invention includes the following steps:
[0044] (1) Construct nucleic acid capable of producing fusion protein;
[0045] (2) Separate peripheral blood mononuclear cells from venous blood, and induce differentiation to obtain antigen-presenting cells; and
[0046] (3) The nucleic acid of step (1) is introduced into the antigen-presenting cell of step (2), and the antigen-presenting cell is cultured under conditions suitable for expression of the nucleic acid.
[0047] In certain embodiments, the method of the present invention includes preparing a plasmid containing the corresponding DNA encoding. After that, the in vitro transcription process is performed. First, the plasmid is linearized with restriction endonuclease, and the linearized plasmid is used as a template to prepare ribonucleic acid molecules...
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[0055] Example 1
[0056] This preparation example is a method for preparing an exemplary fusion protein.
[0057] 1. Preparation of DNA and mRNA constructs
[0058] The gene used to generate an exemplary fusion protein of the present invention was constructed, and its sequence is shown in SEQ ID No.5. In addition, the genes used to generate separate soluble immunoglobulin CD223 and soluble programmed death receptor 1 as controls were further constructed, the sequences of which are shown in SEQ ID No. 6 and 7, respectively. In addition, the antigen GPC3 used in subsequent experiments is encoded by the sequence shown in SEQ ID No.8. The sequence information is shown in Table 1 below.
[0059] Table-1 DNA sequence list
[0060] name serial number Fusion protein SEQ ID No. 5 Soluble immunoglobulin CD223 SEQ ID No. 6 Soluble programmed death receptor 1 SEQ ID No. 7 GPC3 SEQ ID No. 8
[0061] 2. In vitro transcription
[0062] First, use restriction endonuclease to linearize the p...
Example Embodiment
[0074] Example 2
[0075] The experiment was conducted in the same manner as in Example 1, except that the antigen in Example 1 was changed to AFP. The results are shown in the table below.
[0076]
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