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Anti-human ror1 monoclonal antibody and preparation method and application thereof

A monoclonal antibody, antibody technology, applied in the fields of botanical equipment and methods, biochemical equipment and methods, applications, etc., can solve the problem of no ROR1-specific antibody, etc., and achieve the effect of strong affinity, high yield and high purity

Active Publication Date: 2018-03-27
ACROBIOSYSTEMS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are currently no specific antibodies against ROR1

Method used

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  • Anti-human ror1 monoclonal antibody and preparation method and application thereof
  • Anti-human ror1 monoclonal antibody and preparation method and application thereof
  • Anti-human ror1 monoclonal antibody and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Using phage display technology to screen the variable region gene of anti-human ROR1 monoclonal antibody from the antibody library

[0040] 1.1 Human antibody library construction

[0041] The human antibody library was constructed according to Marks et al. J.Mol.Biol., 222, 581-597; Hoogenboom and Winte, J.Mol.Biol., 227, 381-388; Haidaris CG et al., J Immunol Methods.2001 Nov 1; 257(1-2):185-202; Griffiths, A.D. et al. EMBO J., 13, 3245-3260 (1994); Nissim, A. et al. EMBO J., 13, 692-698 (1994). Human Antibody Library.

[0042] In short, the genes of heavy and light chains of immunoglobulins were prepared from peripheral blood lymphocytes, amplified in vitro by PCR, and cloned into phage vectors. Human ROR1 protein (Cat#RO1-H522y, ACROBiosystems Inc) was used as the antigen, and the corresponding specific antibody was screened.

[0043] 1.2 Screening of human antibody library

[0044] Add 1.5 ml of the revived antibody library solution to 13 ml of fresh ...

Embodiment 2

[0055] Example 2 Sequencing of the coding sequence of the hypervariable region of the antibody and the acquisition of the complete sequence of the antibody

[0056] The cloned strains (1G8, 3F4) obtained in Example 1 were respectively amplified in 5 ml of LB medium, and the plasmid DNA was purified using a plasmid DNA extraction and purification kit (Cat#K1910-01) from Lifetechnologies.

[0057] The known human kappa and IgG1 sequences of human antibodies are used to design universal primers for the variable region, and PCR amplification is performed to obtain the light chain and heavy chain variable regions.

[0058] PCR primer: VL-F: 5'CGTACGGTGGCTGCACCATCT 3' (SEQ ID NO: 33);

[0059] VL-R: 5'CTAACACTCTCCCCTGTTGAAGCTC 3' (SEQ ID NO: 34);

[0060] VH-F: 5'GCTAGCACCAAGG GCCCATCGG 3' (SEQ ID NO: 35);

[0061] VH-R: 5' GATCCTCATTTACCCGGAGACAGGGAGAG GC 3' (SEQ ID NO: 36).

[0062] The PCR reaction was performed using PrimeSTAR HS DNA Polymerase (Takara, product number DR010B)...

Embodiment 3

[0073] Example 3 Cloning and Construction of the Expression Vector of the Antibody Variable Region Coding Sequence

[0074] Using Gene from Life technologies Seamless Cloning and Assembly Kit (life technologies Cat#A13288) was used for vector construction. The heavy and light chains of 1G8 and 3F4 were constructed into UCOE vectors, respectively. UCOE vectors were purchased from Millipore Corporation.

[0075] Primer design:

[0076] UCOE-1G8-H-S: gttagttaagttaacggccggccATGGGCTGGTCCCTGATTC (SEQ ID NO: 13);

[0077] UCOE-1G8-H-AS: cgactacgtggccgcgctagcTTATTTACCCGGAGACAGGGAG (SEQ ID NO: 14);

[0078] UCOE-1G8-L-S: gttagttaagttaacggccggccATGGACTTCCAGGTCCAG (SEQ ID NO: 15);

[0079] UCOE-1G8-L-AS: cgactacgtggccgcgctagcTTAACACTCTCCCCTGTTGAAG (SEQ ID NO: 16);

[0080] UCOE-3F4-H-S: gttagttaagttaacggccggccATGGGCTGGTCCCTGATTC (SEQ ID NO: 17);

[0081] UCOE-3F4-H-AS: cgactacgtggccgcgctagcTTATTTACCCGGAGACAGGGAG (SEQ ID NO: 18);

[0082] UCOE-3F4-L-S: gttagttaagttaacggccggccATGG...

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Abstract

The invention provides an anti-human ROR1 monoclonal antibody and its preparation method and application. The antibody has a heavy chain variable region and a light chain variable region, and each of the heavy chain variable region and the light chain variable region has three CDR, the amino acid sequence of CDR1 of the heavy chain variable region is SEQ ID NO: 21 or NO: 27, CDR2 is SEQ ID NO: 22 or NO: 28, and CDR3 is SEQ ID NO: 23 or NO: 29; the light chain can be The amino acid sequence of CDR1 of the variable region is SEQ ID NO:24 or NO:30, CDR2 is SEQ ID NO:25 or NO:31, and CDR3 is SEQ ID NO:26 or NO:32. The monomer of the present invention has good stability and strong specificity, can detect leukemia-specific markers in advance through the monitoring of specific cells, and can also bind to the ROR1 target in breast cancer cells, which is conducive to the completion of silencing experiments.

Description

technical field [0001] The present invention relates to an anti-human ROR1 monoclonal antibody and its preparation method and application, in particular to a humanized anti-human ROR1 monoclonal antibody and its preparation method, and the tracer of the monoclonal antibody in the treatment of cancer cells and targeted applications. Background technique [0002] The receptor tyrosine kinase-like orphan receptor-1 (ROR1) protein, first discovered in the 1990s, was called an orphan receptor because its function was unknown. Later, some researchers found that ROR1 can be expressed at a high level during embryonic development and plays an important role in the regulation of embryonic muscle and bone development. But during subsequent fetal development, expression of the protein is switched off, and ROR1 is not normally expressed in normal cells and tissues in adults. However, cancer cells are an exception. [0003] In 2008, Dr. Kipps' research group found that the interaction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K16/28C12N15/13C12N5/10C12P21/08C12R1/91
Inventor 康平苗景赟陈宜顶
Owner ACROBIOSYSTEMS INC
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