Method for establishing HIV (human immunodeficiency virus) virus antibody yeast display library, method for screening virus broad-spectrum neutral antibody and application thereof

A technology for displaying libraries and virus antigens, applied in the field of immunology, can solve the problem of high false positives, achieve the effect of increasing the yield, avoiding excessive false positives, and avoiding a large number of repeated screening work

CN104725501AInactive Publication Date: 2015-06-24SHENZHEN INST OF ADVANCED TECH
4 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-06-24
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a method for screening a virus broad-spectrum neutral antibody and application thereof. The method comprises the following steps: preparing or providing a virus antigen protein; marking the virus antigen protein by using a fluorescence marker; preparing a cDNA (complementary deoxyribonucleic acid) template of a virus positive patient, designing primers, and amplifying the antibody gene; establishing a yeast antibody display library by using the obtained antibody gene; carrying out antigen protein mixed incubation on yeast cells in the obtained antibody display library and the obtained virus with the fluorescence marker, setting a cell separation door, and separating fluorescence positive yeast cells by a flow cytometry; and carrying out sequencing identification on the fluorescence positive yeast cells to obtain the virus broad-spectrum neutral antibody. The invention also provides a method for establishing an HIV (human immunodeficiency virus) virus antibody yeast display library and application thereof.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of immunology, in particular to a method for constructing an HIV virus antibody yeast display library, a method for screening virus broad-spectrum neutralizing antibodies and applications thereof. Background technique

[0002] Broad-spectrum virus neutralizing antibodies are immunoglobulins acquired by infected patients. This type of antibody broadly binds to virus particles, preventing them from further infecting human cells, and can lead to cleavage of virus particles, thereby causing a "neutralization" response. It is especially important in the treatment of mutating viruses, such as HIV. At present, to screen virus broad-spectrum neutralizing antibodies, patients’ peripheral blood mononuclear lymphocytes (PBMCs) are mostly used to amplify antibody DNA, and phage display is used to perform repeated screening in sequence to establish a phage display antibody library.

[0003] However, since the proportion of neutra...

Examples

Embodiment Construction

[0082] The following description is a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

[0083] Unless otherwise specified in the inventor's examples, all reagents and consumables used are commercially available.

[0084] figure 1 A flowchart of the method for screening virus broad-spectrum neutralizing antibodies provided by the present invention. combine figure 1 , the embodiment of the present invention preferably takes the HIV-1 virus gp120 protein of three GladeB subtypes as an example, and provides a method for screening virus broad-spectrum neutralizing antibodies, including the following steps:

[0085] 1. Select three subtypes of HIV-1 virus gp120 proteins, express and label three dif...