摘要:
An object of the present invention is to provide a promoter activation sequence that allows for stable and efficient expression of a DNA of interest in a mammalian cell. The present invention provides a promoter activation sequence comprising a nucleotide sequence represented by SEQ ID NO: 1, or a nucleotide sequence of 850 or more in a nucleotide sequence having 85% or higher sequence identity thereto; an expression vector comprising the promoter activation sequence, a promoter, and a DNA of interest; and a mammalian cell or a mammal comprising the expression vector.
摘要:
This application provides: a novel mouse artificial chromosome vector that is stable in rodent cells, tissues, or individuals, specifically a mouse artificial chromosome vector derived from a mouse chromosome selected from the group consisting of mouse chromosome 10 and mouse chromosome 16; a cell or a non-human animal comprising the vector; and use of the vector for production of proteins and human antibodies.
摘要:
This application provides: a non-human animal that comprises a mouse artificial chromosome comprising a human antibody heavy chain gene or gene locus, a human antibody light chain κ gene or gene locus, and/or a human antibody light chain λ gene or gene locus, and in which endogenous antibody genes or gene loci corresponding to at least 2 human antibody genes or gene loci have been knocked out, wherein the animal can be stably retained through generations and can produce human antibodies; a method for producing the non-human animal; and a method for producing human antibodies using the non-human animal.
摘要:
Provided is a human antibody against a spike protein of coronavirus, in particular, against a protein in an extracellular region or a receptor-binding domain.
摘要:
Disclosed is a mouse artificial chromosome vector, comprising: a natural centromere derived from a mouse chromosome; a mouse-chromosome-derived long-arm fragment formed by deleting a long-arm distal region at a mouse chromosome long-arm site proximal to the centromere; and a telomere sequence, wherein the vector is stably retained in a cell and/or tissue of a mammal. In addition, disclosed are cells or non-human animals comprising the vector, and use of the cells or non-human animals.
摘要:
Disclosed is a mouse artificial chromosome vector, comprising: a natural centromere derived from a mouse chromosome; a mouse-chromosome-derived long-arm fragment formed by deleting a long-arm distal region at a mouse chromosome long-arm site proximal to the centromere; and a telomere sequence, wherein the vector is stably retained in a cell and/or tissue of a mammal. In addition, disclosed are cells or non-human animals comprising the vector, and use of the cells or non-human animals.
摘要:
A chimeric non-human animal having an in vivo human hepatocyte population, wherein the effects of non-human animal cells on drug metabolism are suppressed or deleted is provided. A method for producing a chimeric non-human animal that lacks a drug-metabolizing system or has a suppressed drug-metabolizing system and is provided with a drug-metabolizing system driven by human hepatocytes, is provided. The method comprises transplanting human hepatocytes into a non-human animal characterized by (i) being immunodeficient, (ii) having liver damage, and (iii) lacking the functions of an endogenous Cyp3a gene.
摘要:
An object of the present invention is to provide a method for producing a reversibly immortalized cell which can allow a cell into which an immortalizing gene is introduced to proliferate over a long period without damaging the chromosome of the cell, and is capable of removing the immortalizing gene, and to provide a method for obtaining a large amount of a reversibly immortalized cell that can be cloned and has stable quality. The present invention provides a method for producing a reversibly immortalized cell, comprising the steps of introducing a chromosomally non-integrated RNA virus vector loaded with one or two or more immortalizing gene(s), selected from the group consisting of Bmi-1 gene, TERT gene, and SV40T gene, into a mammalian cell so that the immortalizing gene is expressed in the cell; and culturing the obtained cell for proliferation.