摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The present invention relates to transgenic animals, as well as compositions and methods relating to the characterization of gene function. Specifically, the present invention provides transgenic mice comprising mutations in a chordin gene. Such transgenic mice are useful as models for disease and for identifying agents that modulate gene expression and gene function, and as potential treatments for various disease states and disease conditions.
摘要:
The invention provides transgenic non-human animals and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
The present invention features transgenic mice models for gene function, wherein the transgenic mice are characterized by having altered serotonin 5-HT6 receptor gene function. The transgenic mice may be either homozygous or heterozygous for a disruption in the endogenous 5-HT6 gene. Transgenic mice homozygous for a disruption in the endogenous 5-HT6 gene display a phenotype of increased anxiety behavior including diminished investigation of foreign objects and an elevation in stretched attend postures.
摘要:
The present invention features non-human transgenic animal models for gene function, wherein the transgenic animal is characterized by having altered endogenous apolipoprotein E gene function and a transgene for an exogenous human apolipoprotein E isoform. The transgenic animals may be either homozygous or heterozygous for the transgene. The invention also features methods for using non-human transgenic animal models for the study of apolipoprotein E-mediated pathologies and the identification of compounds and therapies for such pathologies.
摘要:
Provided is a transgenic non-human eukaryotic animal whose germ cells and somatic cells contain the amyloid precursor protein sequence introduced into the animal, or an ancestor of the animal, at an embryonic stage. In mice, an age-related CNS disorder characterized by agitation, neophobia, seizures, inactivity, diminished cerebral glucose utilization, cortico-limbic gliosis, and death, develops. An acceleration of this disorder occurs in transgenic mice expressing human and mouse Alzheimer amyloid precursor proteins (APP) produced using a hamster prion protein gene-derived cosmid vector that confers position-independent, copy number-dependent expression. In transgenic mice the disorder develops in direct relationship to brain levels of transgenic APP, but mutant APP confers the phenotype at lower levels of expression than wild-type APP. The disorder occurs in the absence of extracellular amyloid deposition, indicating that some pathogenic activities of APP are dissociated from amyloid formation.
摘要:
The invention provides transgenic non-human animals, such as transgenic rodents and transgenic non-human mammalian cells harboring a transgene encoding an APP polypeptide comprising the Swedish mutation.
摘要:
A transgenic non-human animal with alterations in a bradykinin B2 receptor gene is prepared by introduction of a gene encoding an altered bradykinin B2 receptor into a host non-human animal.
摘要:
The present invention provides a transgenic mouse which exhibits a circling phenotype as a result of insertional mutagenesis. The insertional mutant was caused by introducing genetic material into the genome of the mouse, or an ancestor thereof, at an embryonic stage. The genetic material appears to alter or disrupt an endogenous genetic locus affecting motor function, resulting in the mutation. More particularly, transgenic mouse lines were made by microinjection of about 24 kb XhoI genomic DNA fragment containing the mouse Ren-2.sup.d renin gene into BCF.sub.1, fertilized eggs. One transgenic mouse line, designated TgX15 (also known as chakragati mice), bred to homozygosity was found to exhibit a circling phenotype. The transgenic mouse line TgX15 may be an important resource for investigating the molecular genetic mechanisms that determine specific aspects of brain function and behavior. Also, these mice may be useful to evaluate new and potentially more effective agents for the therapeutic treatment of disorders involving dopaminergic dysfunction such as Parkinsonism and schizophrenia.
摘要:
A mutated Csf1r gene is disclosed. The mutated Csf1r gene is obtained by changing the 2557th nucleotide of a Csf1r gene from C to A, leading to obtain a mutated protein encoded by the mutated Csf1r gene substitute the 853rd amino acid from proline to threonine. The mutated protein, expression vectors, recombinant viruses, recombinant cells, recombinant bacteria, or recombinant vectors are also disclosed. A method for constructing a murine model with mutations in Csf1r gene. This method includes introducing the targeted vector containing the mutated Csf1r gene into mouse embryonic stem cells, followed by injection into blastocysts to generate F0 generation mice. The F0 generation mice are then bred with mice that specifically express Cre enzyme in tissues, followed by screening. The constructed murine model has significant applications in studying the pathogenic mechanisms of brain diseases caused by microglial cell dysfunction and screening valuable medicine for treating brain diseases.