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Method for pig vWF gene specific knockout through CRISPR-Cas9 and sgRNA for specially targeting vWF gene

A specific and genetic technology, applied in the fields of gene knockout and genetic engineering, can solve the problems of low recombination efficiency, cumbersome and time-consuming work, time-consuming mutant screening work, etc., and achieve the effect of long solution cycle and high solution cost.

Inactive Publication Date: 2016-04-20
THE SECOND PEOPLES HOSPITAL OF SHENZHEN
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

HR technology is inefficient due to reorganization (efficiency is only about 10 -6 ), the screening of mutants is very time-consuming and inefficient, and has gradually been replaced by
The cutting efficiency of TALEN technology and ZFN technology can generally reach 20%, but both require the construction of protein modules that can recognize specific sequences, and the preliminary work is tedious and time-consuming
The module design of ZFN technology is relatively complex and has a high miss rate, and its application is limited

Method used

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  • Method for pig vWF gene specific knockout through CRISPR-Cas9 and sgRNA for specially targeting vWF gene
  • Method for pig vWF gene specific knockout through CRISPR-Cas9 and sgRNA for specially targeting vWF gene
  • Method for pig vWF gene specific knockout through CRISPR-Cas9 and sgRNA for specially targeting vWF gene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1, Selection and design of Susscrofa (pig) vWF gene sgRNA target sequence

[0067] The target sequence determines the targeting specificity of the sgRNA and the efficiency of inducing Cas9 to cleave the target gene. Therefore, efficient and specific target sequence selection and design are the prerequisites for constructing sgRNA expression vectors.

[0068] 1. sgRNA target sequence selection of vWF gene

[0069] For the vWF gene, the following principles should be followed in the selection of target sequences:

[0070] (1) Find the target sequence conforming to the 5'-N(20)NGG-3' rule in the exon coding region of the vWF gene, where N(20) represents 20 consecutive bases, and each N represents A or T Or C or G, the target sequence conforming to the rules can be located on the sense strand or the antisense strand;

[0071] (2) Select the exon coding region sequence, the cleavage of such coding region sequence will cause the functional knockout of vWF gene, and...

Embodiment 2

[0087] Embodiment 2, constructing the sgRNA expression vector of vWF gene

[0088] 1. Synthesis of DNA Inserts

[0089] (1) Synthesize the forward and reverse oligonucleotide sequences designed above

[0090] The oligonucleotide sequence can be specifically synthesized by a commercial company (such as Invitrogen) according to the provided sequence. In this example and the following examples, the knockout effect of the target sequence shown in the No. 1 sequence listed in Table 1 on the vWF gene was studied.

[0091] The forward oligonucleotide sequence and reverse oligonucleotide sequence corresponding to No. 1 target sequence are as follows:

[0092] GACCGGCCCCGCGGGCATGGAGTAC (SEQ ID NO: 60);

[0093] AAACGTACTCCATGCCCGCGGGGCC (SEQ ID NO: 61).

[0094]The corresponding forward and reverse oligonucleotide sequences are annealed and annealed to form double-stranded DNA fragments with cohesive ends.

[0095] The reaction system (20μL) is as follows:

[0096] Forward oligon...

Embodiment 3

[0129] Example 3. Obtaining a pseudotyped lentivirus expressing vWFsgRNA

[0130] 1. Material preparation

[0131] Amplify and extract packaging plasmids pLP1, pLP2, and pLP / VSVG (purchased from Invitrogen, whose maps are shown in figure 2 , image 3 and Figure 4 shown); amplify and extract vector plasmid lentiCRISPRv2-vWF; culture packaging cell line HEK293T cells (purchased from ATCC); DMEM medium, Opti-MEM medium and fetal bovine serum FBS (purchased from Gibco); Lipofectamine2000 (purchased from from Invitrogen); HEK293T cells were cultured in 5% CO 2 In the culture environment of 37°C, the culture medium is DMEM medium containing 10% FBS.

[0132] 2. Transfection and Viral Packaging

[0133] Day 1: Passage the packaging cell line HEK293T to 10cmdish, about 30% confluence;

[0134] The next day: when HEK293T reaches 80% confluence, transfect according to the following recipe:

[0135] Prepare Mixture 1, containing:

[0136] lentiCRISPRv2-vWF: 6 μg

[0137] pLP1:...

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Abstract

The invention discloses a method for pig vWF gene specific knockout through CRISPR-Cas9 and sgRNA for specially targeting a vWF gene. A target sequence of the sgRNA for specially targeting the vWF gene on the vWF gene meets a 5'-N(20)NGG-3' sequence arrangement rule, wherein the N(20) represents 20 continuous bases, and each N represents A, T, C or G; the target sequence on the vWF gene locates at an exon coding area of the vWF gene; and the target sequence on the vWF gene is unique. The sgRNA is used in a method for pig vWF gene specific knockout through the CRISPR-Cas9, the pig vWF gene can be rapidly, accurately, efficiently and specifically knocked out, and the problems of the long period and high cost of construction of a vWF gene knockout pig are effectively solved.

Description

technical field [0001] The invention relates to the technical field of genetic engineering, in particular to the technical field of gene knockout, in particular to a method for specifically knocking out porcine vWF gene by CRISPR-Cas9 and an sgRNA for specifically targeting the vWF gene. Background technique [0002] Organ transplantation is the most effective treatment for diseases of organ failure. So far, nearly one million patients around the world have extended their lives through organ transplantation. With the aging of the population and the advancement of medical technology, more and more patients need organ transplantation, but the shortage of donor organs seriously restricts the development of organ transplantation. Taking kidney transplantation as an example, as many as 300,000 patients need kidney transplantation in my country every year, but no more than 10,000 donated kidneys can be used for transplantation, and most patients die of kidney failure. Relying on...

Claims

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Application Information

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IPC IPC(8): C12N15/117C12N15/867
CPCC07K14/47C12N15/117C12N15/8676C12N2310/17C12N15/113C12N15/86
Inventor 蔡志明牟丽莎高汉超谢崇伟刘璐陈鹏飞张军方陆赢
Owner THE SECOND PEOPLES HOSPITAL OF SHENZHEN
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