Method for establishing NOD-Rag2nullIL-2Rgamma null immune deficiency mouse by using gene edition technique

Abstract

The invention belongs to the technical field of biologics and discloses a method for establishing NOD-Rag2nullIL-2Rgamma null immune deficiency mice by using a gene edition technique. The method comprises the following steps: (1) knocking off genes Rag2 and IL-2Rgamma in a mouse embryo genome by using a CAS9 technique so as to delete immune systems of mice, and establishing DNA (Deoxyribonucleic Acid) without immune related gene functions of mouse embryos; (2) purifying the DNA established in the step (1), and carrying out in vitro transcription with SP6 reverse transcriptase so as to obtain mRNA; (3) purifying the mRNA obtained in the step (2), and cryopreserving in ultrapure water without an RNA enzyme for later micro-injection; and (4) under an SPF grade breeding condition, breeding fertilized female mice and pseudopregnancy female mice. By using the latest CAS9 gene edition technique, specific knockoff of the genes Rag2 and IL-2Rgamma is carried out, immune deficiency of T, B and NK is achieved, blanks of strains of different gene edition types are made up, and requirements of animal testing and disease model research can be met.

Description

Technical field [0001] The invention specifically relates to a method for constructing NOD-Rag2null IL-2Rγnull immunodeficiency mice by using gene editing technology, and belongs to the field of biotechnology. Background technique [0002] Animal models are mainly used for experimental physiology, experimental pathology and experimental therapeutics (including new drug screening) research. The development of human diseases is very complicated. People themselves are used as experimental subjects to explore the mechanism of disease in depth, and the development of medicine has been slow. The accumulated clinical experience not only has limitations in time and space, but many experiments are morally based. And methods are also restricted. With the help of indirect research on animal models, it is possible to consciously change those factors that are impossible or difficult to exclude under natural conditions, so as to more accurately observe the experimental results of the model an...

AI Technical Summary

Problems solved by technology

Therefore, the existing immunodeficiency animal models can not well meet the needs of drug testing and heterogeneous cell / tissue transplantation research, etc., which is a problem to be solved by those skilled in the art