Single-domain antibody resistant to human beta2-microglobulin as well as preparation method and application of single-domain antibody
A β2 microglobulin and single domain antibody technology, applied in the field of anti-β2 microglobulin antibodies, can solve the problems of increased sensitivity, high production cost, limited antibody immobilization density, etc., to promote diagnosis and treatment, high specificity Binding capacity, improved diagnosis and treatment outcomes
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0037] Example 1 Screening of monoclonal phage antibodies
[0038] Using phage display technology to carry out multiple rounds of enrichment and screening of the alpaca phage antibody library to purify β 2 Microglobulin has undergone four rounds of enrichment screening of "adsorption-elution-amplification" for the antigen, showing that the recovery rate of each round of screening is increasing, indicating that after screening, it has β 2 Microglobulin-specific phages are highly enriched.
[0039] The specific method is as follows:
[0040] 1. Establishment of alpaca phage antibody library
[0041] The names of the primers and their sequences are shown in Table 1. The underlined part is the restriction site.
[0042] Table 1. Primer name and its sequence
[0043]
[0044]
[0045] (1) Separation of lymphocytes and separation of total RNA
[0046] Take 100ml of peripheral blood from a 3-year-old female alpaca, put it into an anticoagulation tube, and add an equal volume of lymphocyte separa...
Example Embodiment
[0084] Example 2 Detection of monoclonal phage antibodies:
[0085] (1) Randomly pick 80 single bacterial clones from the TY-AG plate cultured overnight after the fourth round of screening. After mixing BLT5615 with the phage preservation solution / lysate (1‰ to 0.1‰), culture them on a shaker at 37°C. After lysing the bacteria, add NaCl to the concentration of 0.5M in the solution immediately, centrifuge at 10000rpm for 10min, take the supernatant, and recover the phage solution. ELISA method for detection: Antigen β 2 The microglobulin was coated with an ELISA plate (0.4μg / well), 100μl of monoclonal phage solution was added to each well after sealing, and incubated at 37°C for 2h. After washing, add 1:5000 HRP-labeled mouse anti-M13 antibody, and incubate at 37°C for 1 hour. The positive control is the primary antibody (mouse anti-human β 2 Microglobulin), secondary antibody (goat anti-mouse IgG); negative control only added 2% MPBS. Using o-phenylenediamine as the substrate, ...
Example Embodiment
[0087] Example 3 Determination of DNA sequence of positive clones:
[0088] The phagemids of A and B positive clones were extracted respectively, using sdAb DNA sequencing primers (upstream primers and downstream primers from T7select cloning kit), the SdAb DNA sequence was determined by dideoxy end termination method.
[0089] Obtain the nucleotide sequences of clones A and B, and use Blast software to perform a comprehensive comparison and analysis of the obtained sequences with the single domain antibody variable region genes in Gene Bank. The analysis results show that the variable region genes of clones A and B are in line with the SdAb antibody gene, and the deduced amino acid sequence has a typical antibody variable region structure. The protein sequence determines the start and end of the CDR according to the blast and Kabat codes. Location. Complementarity determining region (CDR) is highly variable in amino acid composition and arrangement. The three CDRs together const...
PUM
Property | Measurement | Unit |
---|---|---|
Titer | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap