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Monoclonal antibody ZK7C3 and application

An antibody and sequence listing technology, applied in applications, antibodies, antiviral agents, etc., can solve problems such as aggravating the disease, increasing the virus entry, and aggravating the severity of the disease, and achieves far-reaching social significance and significant application value.

Active Publication Date: 2018-11-02
GUANGZHOU EIGHTH PEOPLES HOSPITAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that people who have been infected with different serotypes of dengue virus successively have the risk of aggravating the severity of the disease, that is, the antibodies produced by the pre-infected serotype of dengue virus can bind to the different serotypes of dengue virus reinfected, but cannot neutralize Viruses, on the contrary, increase the entry of viruses and aggravate the condition

Method used

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  • Monoclonal antibody ZK7C3 and application
  • Monoclonal antibody ZK7C3 and application
  • Monoclonal antibody ZK7C3 and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, the discovery of antibody

[0041] 1. Protein preparation

[0042] 1. Construction of recombinant plasmids

[0043] (1) Synthesize the double-stranded DNA molecule shown in Sequence 2 of the Sequence Listing.

[0044] The double-stranded DNA molecule shown in sequence 2 of the sequence listing encodes the protein shown in sequence 1 of the sequence listing, wherein the open reading frame is nucleotides 13-1296 from the 5' end of sequence 2.

[0045]In sequence 1 of the sequence listing, the 1st to 19th amino acid residues from the N-terminal form the signal peptide, the 20th to 421st amino acid residues form the E protein of Zika virus, and the 422nd to 427th amino acid residues form the His 6 Label. Name the protein shown in Sequence 1 of the sequence listing as E-His 6 Fusion protein, expected molecular weight 50kDa.

[0046] (2) Double-digest the double-stranded DNA molecule obtained in step 1 with restriction endonucleases BamHI and NotI, and reco...

Embodiment 2

[0074] Example 2, Preparation of ZK7C3 Antibody

[0075] 1. Construction of recombinant plasmids

[0076] The double-stranded DNA molecule shown in sequence 4 of the sequence listing is inserted into the PMD18T vector to obtain a heavy chain expression vector. In sequence 4 of the sequence listing, nucleotides 1 to 888 form the CMV promoter, nucleotides 889 to 2301 encode the full-length heavy chain shown in sequence 3 of the sequence listing, nucleotides 2354 to 2499 for the ployA fragment.

[0077] The double-stranded DNA molecule shown in sequence 6 of the sequence listing is inserted into the PMD18T vector to obtain a light chain expression vector. In sequence 6 of the sequence listing, the 1st to 888th nucleotides constitute the CMV promoter, the 889th to 1590th nucleotides encode the full-length light chain shown in sequence 5 of the sequence listing, and the 1591st to 1736th nucleotides for the ployA fragment.

[0078] 2. Antibody preparation

[0079] 1. The heavy ...

Embodiment 3

[0087] Embodiment 3, the neutralizing activity of ZK7C3 antibody to virus

[0088] 1. Preparation of virus

[0089] Zika virus was inoculated into C6 / 36 cells (using DMEM medium containing 10% FBS), placed at 28°C, 5% CO 2 Under the condition of static culture for 4 days, then centrifuged at 3000rpm for 5min, the supernatant was collected, which was the Zika virus liquid.

[0090] 2. Detection of neutralizing activity of monoclonal antibodies

[0091] 1. Take the ZK7C3 solution prepared in Example 2 and dilute it with PBS buffer (pH7.2, 10mM) to obtain antibody dilution.

[0092] 2. Inoculate Vero cells into a six-well plate (4 × 10 per well5 cells), cultured overnight until the cell density reached 90% and evenly covered the well plate.

[0093] 3. Mix the Zika virus solution prepared in step 1 with the antibody dilution prepared in step 1 to obtain each mixed solution (in each milliliter of mixed solution, the virus content is 100 pfu, and the antibody concentration is 8 ...

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Abstract

The invention discloses a monoclonal antibody ZK7C3 and application. The invention provides an IgG antibody named as ZK7C3 and composed of light chains and heavy chains. CDR1, CDR2 and CDR3 in a heavychain variable region of the heavy chains are sequentially the No. 45-52 amino acid residues, No. 70-77 amino acid residues and No. 116-129 amino acid residues from N terminal in sequence 3 of a sequence table; CDR1, CDR2 and CDR3 in a light chain variable region of the light chains are sequentially the No. 45-50 amino acid residues, No. 68-70 amino acid residues and No. 107-117 amino acid residues from N terminal in sequence 5 of the sequence table. The invention further provides application of the IgG antibody in preparation of a medicine for inhibiting Zika virus. The antibody disclosed bythe invention has significant application value on prevention and control of Zika virus diseases and produces profound social significance.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a monoclonal antibody ZK7C3 and its application. Background technique [0002] Zika virus, dengue virus, West Nile virus and yellow fever virus belong to the flavivirus genus. Zika virus disease is a mosquito-borne infectious disease caused by Zika virus with mild or no symptoms. The main manifestations are mild fever, rash (mostly maculopapular), headache, arthralgia, muscle pain, weakness, and non-suppurative conjunctivitis. In recent years, the Zika virus has broken out in French Polynesia and Brazil successively, and continues to spread rapidly all over the world, especially in Latin America and the Caribbean, which has become an international public health emergency. [0003] Zika virus infection causes only mild symptoms. However, in the epidemic of Polynesia, serious neurological complications appeared in adults - Guillain-Barré syndrome (GBS), with an incidence...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K16/10C12N15/13A61K39/42A61P31/14
CPCA61K2039/505C07K16/1081C07K2317/565C07K2317/76Y02A50/30
Inventor 庾蕾张林琦张复春王若珂高菲
Owner GUANGZHOU EIGHTH PEOPLES HOSPITAL
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