摘要:
The present invention provides for a new type of gene trap cassettes, which can induce conditional mutations. The cassettes rely on directional site-specific recombination systems, which can repair and re-induce gene trap mutations when activated in succession. After the gene trap cassettes are inserted into the genome of the target organism, mutations can be activated at a particular time and place in somatic cells. In addition to their conditional features, the gene trap cassettes create multipurpose alleles amenable to a wide range of post-insertional modifications. Such gene trap cassettes can be used to mutationally inactivate all cellular genes. In addition the invention relates to a cell, preferably a mammalian cell which contains the above mentioned gene trap cassette. Moreover, the invention relates to the use of said cell for identification and/or isolation of genes and for the creation of transgenic organisms to study gene function at various developmental stages, including the adult, as well as for the creation of animal models of human disease useful for in vivo drug target validation. In conclusion, the present invention provides a process which enables a temporally and/or spatially restricted inactivation of all genes that constitute a living organism.
摘要:
The present invention provides for a new type of gene trap cassettes, which can induce conditional mutations. The cassettes rely on directional site-specific recombination systems, which can repair and re-induce gene trap mutations when activated in succession. After the gene trap cassettes are inserted into the genome of the target organism, mutations can be activated at a particular time and place in somatic cells. In addition to their conditional features, the gene trap cassettes create multipurpose alleles amenable to a wide range of post-insertional modifications. Such gene trap cassettes can be used to mutationally inactivate all cellular genes. In addition the invention relates to a cell, preferably a mammalian cell which contains the above mentioned gene trap cassette. Moreover, the invention relates to the use of said cell for identification and/or isolation of genes and for the creation of transgenic organisms to study gene function at various developmental stages, including the adult, as well as for the creation of animal models of human disease useful for in vivo drug target validation. In conclusion, the present invention provides a process which enables a temporally and/or spatially restricted inactivation of all genes that constitute a living organism.
摘要:
The present invention provides for a new type of gene trap cassettes, which can induce conditional mutations. The cassettes rely on directional site-specific recombination systems, which can repair and re-induce gene trap mutations when activated in succession. After the gene trap cassettes are inserted into the genome of the target organism, mutations can be activated at a particular time and place in somatic cells. In addition to their conditional features, the gene trap cassettes create multipurpose alleles amenable to a wide range of post-insertional modifications. Such gene trap cassettes can be used to mutationally inactivate all cellular genes. In addition the invention relates to a cell, preferably a mammalian cell which contains the above mentioned gene trap cassette. Moreover, the invention relates to the use of said cell for identification and/or isolation of genes and for the creation of transgenic organisms to study gene function at various developmental stages, including the adult, as well as for the creation of animal models of human disease useful for in vivo drug target validation. In conclusion, the present invention provides a process which enables a temporally and/or spatially restricted inactivation of all genes that constitute a living organism.
摘要:
The present invention relates to a novel class of gene trap vector (enhanced gene trap vectors, eGTV) for efficiently identifying silent or weakly expressed target genes in mammalian genomes, methods of their production and methods for identifying and mutating target genes by using the enhanced gene trap vectors. The gene trap vectors of the present invention can also be used for inducing the expression of silent genes and enhancing the expression of weakly expressed genes. The use of the enhanced gene trap vectors for creating transgenic organisms to identify gene function and to validate pharmaceutical compounds prior to clinical applications is a further aspect of the present invention.
摘要:
The present invention relates to a DNA molecule comprising: (a) a first DNA sequence comprising: (aa) a coding sequence giving rise upon transcription to a factor that contributes to the reprogramming of a somatic cell into an induced pluripotent stem (iPS) cell; (ab) a promoter mediating the transcription of said coding sequence; and (ac) two sequence motifs that mediate excision of (aa) and/or (ab) from the DNA molecule, wherein one sequence motif is positioned 5′ and the other sequence motif is positioned 3′ of the sequence to be excised; (b) a second DNA sequence comprising a sequence motif that mediates site-specific integration of (a) into another DNA molecule. Further, the invention relates to DNA molecule comprising: (a) a first DNA sequence comprising: (aa) a coding sequence giving rise upon transcription to a factor that contributes to the reprogramming of a somatic cell into an induced pluripotent stem cell; and (ab) a promoter mediating the transcription of said coding sequence; (b) a second DNA sequence comprising: (ba) a sequence motif that mediates extrachromosomal self-replication of the DNA-molecule; and (bb) two sequence motifs that mediate excision of at least said sequence motif of (ba) from the second DNA sequence (b), wherein one sequence motif is located 5′ of (ba) and the other sequence motif 3′ of (ba). Also, the invention relates to a vector comprising the DNA molecule of the invention, a method for assembly of said vector and a somatic cell comprising said DNA molecule or said vector of the invention. Furthermore, the invention relates to methods to generate an induced pluripotent stem (iPS) cell, an induced pluripotent stem cell obtainable by said methods, to a kit comprising the DNA molecule of the invention, to a cell line or cell culture collection comprising the induced pluripotent stem cell of the invention, to the use of said cell or cell line as a research tool, to a method to generate a transgenic non-human animal and to a non-human animal generated by said method. Finally, the invention relates to a composition for gene therapy, regenerative medicine, cell therapy or drug screening.
摘要:
The present invention relates to a method for identifying a compound capable of modulating an anxiety or depression disorder comprising the steps of: (a) contacting a composition comprising a B-Raf protein or a B-Raf gene in expressible form or a transcript thereof with a compound under conditions that allow for an interaction of the B-Raf protein or the B-Raf gene or a transcript thereof and the compound; and (b) measuring whether said interaction, if any, results in (i) a change of B-Raf kinase activity compared to B-Raf kinase activity in the absence of said compound; (ii) a modulation of the expression of the B-Raf gene compared to B-Raf gene expression in the absence of said compound; or (iii) the formation of a complex between the compound and the B-Raf protein, wherein such a change in activity, modulation of expression or the formation of a complex is indicative of the compound being a modulator of an anxiety or depression disorder. Further, the invention relates to a method for treating an anxiety or depression disorder in an individual comprising administering to the individual an effective amount of a compound inhibiting B-Raf kinase activity or gene expression and to a use of a compound that inhibits B-Raf kinase activity or gene expression in the manufacture of a pharmaceutical composition for treating an anxiety or depression disorder. Moreover, the invention relates to a method of diagnosing a B-Raf associated anxiety or depression disorder and to a genetically engineered mouse. Finally, the invention also relates to a method of identifying another gene contributing to the pathophysiology of an anxiety or depression disorder apart from B-Raf.
摘要:
The present invention relates to a method for modifying a target sequence in the genome of a mammalian cell, the method comprising the step of introducing into a mammalian cell: a. one or more compounds that introduce double-strand breaks in said target sequence; b. one or more DNA molecules comprising a donor DNA sequence to be incorporated by homologous recombination into the genomic DNA of said mammalian cell within said target sequence, wherein said donor DNA sequence is flanked upstream by a first flanking element and downstream by a second flanking element, wherein said first and second flanking element are different and wherein each of said first and second flanking sequence are homologous to a continuous DNA sequence on either side of the double-strand break introduced by said one or more compounds of a. within said target sequence in the genome of said mammalian cell; and c. one or more compounds that decrease the activity of the non-homologous end joining (NHEJ) DNA repair complex in said mammalian cell. Further, the invention relates to a method of producing a non-human mammal carrying a modified target sequence in its genome.
摘要:
The present invention relates to a method of modifying a target sequence in the genome of a eukaryotic cell, the method comprising the step: (a) introducing into the cell a fusion protein comprising a DNA-binding domain of a Tal effector protein and a non-specific cleavage domain of a restriction nuclease or a nucleic acid molecule encoding the fusion protein in expressible form, wherein the fusion protein specifically binds within the target sequence and introduces a double strand break within the target sequence. The present invention further relates to the method of the invention, wherein the modification of the target sequence is by homologous recombination with a donor nucleic acid sequence further comprising the step: (b) introducing a nucleic acid molecule into the cell, wherein the nucleic acid molecule comprises the donor nucleic acid sequence and regions homologous to the target sequence. The present invention also relates to a method of producing a non-human mammal or vertebrate carrying a modified target sequence in its genome. Furthermore, the present invention relates to a fusion protein comprising a DNA-binding domain of a Tal effector protein and a non-specific cleavage domain of a restriction nuclease.