摘要:
An object of the present invention is to provide a method for introducing a gene into an embryo for production of a human disease model primate animal using a non-human primate animal such as a marmoset. The present invention relates to a method for introducing a foreign gene into an early embryo of a non-human primate animal, which comprises placing early embryos of a non-human primate in a 0.2 M to 0.3 M sucrose solution, so as to increase the volume of the perivitelline spaces, and then injecting a viral vector containing a human foreign gene operably linked to a promoter into the perivitelline spaces of the early embryos.
摘要:
Methods of disrupting germ cell migration and development in a fish embryo by inducing targeted expression of Sdf-1 a or Lif and disruption of the Sdf-1 a gradient or a Lif signaling pathway in the fish embryo have been developed. Plasmid constructs containing a gene encoding Sdf-1 a or Lif and a gene encoding a signaling sequence for targeted expression of Sdf-1 a or Lif have been generated. The plasmids will be administered to a fish or a population of fish to reproductively sterilize the population with efficacy of up to 100%. Transgenic fish of this invention are reproductively incompetent of genetically contaminating a wild fish population.
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.
摘要:
A lentiviral vector was used to produce non-human animals that express human sFLT1 specifically in the murine placenta, to provide model animals of diseases such as pregnancy-induced hypertension syndrome that are close to the clinical conditions, methods for producing the model animals, methods of screening for candidate compounds as therapeutic agents for diseases such as pregnancy-induced hypertension syndrome by using the model animals, and therapeutic agents for diseases such as pregnancy-induced hypertension syndrome. As a result, the model animals were found to exhibit symptoms that are very close to the clinical conditions in human, which are presentation of hypertension as well as placental insufficiency, intrauterine growth retardation, glomerulosclerosis, and proteinuria during pregnancy, and improvement of those symptoms postpartum. Furthermore, when pravastatin was administered to this model animal, it was found that diseases such as pregnancy-induced hypertension syndrome were improved by the activation of placenta-derived growth factor (PIGF) which antagonizes sFLT1.
摘要:
A Myelin Basic Protein-luciferase bioimaging noninvasive model to visualize and quantify demyelination and remyelination events in the CNS at transcriptional level in vivo is provided. Luciferase-expressing transgenic animals were generated with myelin basic protein (MBP) promoter coupled to firefly luciferase reporter. The MBP-luci bioimaging model provides a means to monitor myelination status and the efficacy of a remyelination modulating test compound. An advantage of bioimaging is that a subject in a longitudinal study can serve as its own control. The same subject can be tracked over a demyelination and remyelination process continuously over a period of at least 10 weeks. This model enables normalization of individual animal imaging response and provides quality data with considerably reduced variance. In addition, because cohorts of animals need not be sacrificed at different time points, reduction in the number necessary for a compound efficacy study is possible.
摘要:
The present invention relates to a method for determining a genotoxicity of a test substance, comprising the steps of: (a) transforming a fish with a nucleotide sequence encoding a non-fluorescent fluorescence protein with a mutation; (b) treating a test substance to the transformed fish; and (c) measuring a fluorescence in the test substance-treated fish, wherein the fluorescence is generated by reversion of the non-fluorescent fluorescence protein to the fluorescence protein due to a back mutation of the nucleotide sequence in the test substance-treated fish. According to the present invention, MutaFish system, Zebrafish (Brachydanio rerio) line, in which the fluorescence protein variant, preferably wild type EGFP variant (EGFPmut) is transformed, provides a much excellent animal system for measuring a genotoxicity of a test substance via production of a fluorescent fry larvae generated through reversion of the fluorescent protein variant caused by treatment of the test substance. Accordingly, the MutaFish system of the present invention may determine a genotoxicity of a test substance in much more simple and high-throughput manner in an eukaryote to which the conventional methods (e.g., Ames test) may be not applied.
摘要:
Disclosed are polynucleotides and methods for expressing light activated proteins in animal cells and altering an action potential of the cells by optical stimulation. The disclosure also provides animal cells and non-human animals comprising cells expressing the light-activated proteins.
摘要:
The present invention provides a preparation method of a chimeric embryo and a chimeric rat, which is characterized by contacting a rat pluripotent stem cell and a host embryo in the presence of an ES cell differentiation inhibitor. The method includes (a) a step for contacting a fertilized host embryo collected from a female rat and a rat pluripotent stem cell in the presence of an ES cell differentiation suppressant, and (b) a step for culturing the host embryo in contact with the rat pluripotent stem cell to form a chimeric embryo.
摘要:
The present invention is directed to fish whose genome has integrated therein an oncogenic nucleic acid operably linked to a promoter. Methods of making the fish and methods for their use are also provided. The fish may advantageously be utilized in methods of screening for drugs or agents that modulate oncogene-mediated neoplastic or hyperplasic transformation, or that modulate sensitivity to chemotherapy or radiation therapy Immortal tumor cells lines, methods of making immortal tumor cells lines and methods of their use are also provided.
摘要:
The present invention discloses a mutant blue fluorescent protein (BFP), mutated by an error-prone PCR method or a DNA shuffling method with using a BFPvv D7 of SEQ ID NO:2 as parents, obtained from a wild type blue fluorescent protein BfgV of SEQ ID NO:1, obtained from Vibrio vulnificus, wherein a set of mutation positions of the mutant BFP corresponding to SEQ ID NO:2 comprises position 176 and position 178. In a preferred embodiment, the set of mutation positions of the mutant BFP corresponding to SEQ ID NO:2 comprises a S176R mutation or a V178I mutation. Moreover, methods of using the blue fluorescent proteins from Vibrio vulnificus for fluorescence resonance energy transfer (FRET) and a blue fluorescent fish are also provided.
摘要翻译:本发明公开了一种突变型蓝色荧光蛋白(BFP),其通过易错PCR法或使用SEQ ID NO:2的BFPvv D7作为亲本的DNA改组法从野生型蓝色荧光蛋白BfgV获得突变 从创伤弧菌获得的SEQ ID NO:1,其中与SEQ ID NO:2相对应的突变体BFP的一组突变位置包含位置176和位置178.在优选实施方案中,突变体BFP的突变位置集合对应 至SEQ ID NO:2包含S176R突变或V178I突变。 此外,还提供了使用来自创伤弧菌的蓝色荧光蛋白用于荧光共振能量转移(FRET)和蓝色荧光鱼的方法。