Core 1: Mouse and Cell Modeling

项目概要（核心-1） 基因工程细胞系和小鼠模型对于阐明复杂的生物过程至关重要。 自定义提出这些科学问题的背景的能力达到了前所未有的水平 细节和技术精度。基本上，任何遗传靶标都可以被改变以解决蛋白质定位， 内源性表达水平的蛋白质-蛋白质相互作用或结构-功能关系， 调控小鼠和细胞建模核心（核心1）将为P01项目创建新的研究材料 并重新利用多个已建立的小鼠模型，以原代细胞系的方式产生新的试剂。 利用基于CRISPR/Cas9的基因编辑工具，Core 1将修改人类细胞系，以实现对细胞的解剖。 各个P01项目中描述的BRCA网络。关键基因将在乳腺癌中被破坏 神经管母细胞瘤细胞系和参与DNA修复和复制应激缓解的蛋白质将被修饰 来破坏它们的相互作用域。调查人员之间的这种全面方法将使交流成为可能。 与每个项目相关的结果，并告知未来的方向。小鼠胚胎成纤维细胞（MEFs）和 将产生胚胎干（ES）细胞系以研究蛋白质在DNA损伤位点的定位， 在接近野生型背景下的修复效率，除了所需的突变。在生产所需的 将同时生产MEF（基因匹配的对照品）。常用的细胞系可能具有 DNA修复途径中的未表征缺陷，而新产生的MEFs和ES细胞接近天然 状态将通过向现有Brca 1/Trp 53条件系中添加以下基因的无效等位基因来制备独特的小鼠模型： 一个强有力的化疗耐药性预测指标。由于Brca 1、Trp 53和新靶点都位于同一个 染色体，CRISPR/Cas9将用于体外受精（IVF）衍生的胚胎中，以破坏基因 而不必进行广泛的杂交以将三个物理上接近的等位基因联合收割机组合。另一个独特 将通过删除Brca 1中编码关键结合区的基因组序列来制备小鼠模型。 互动伙伴。核心1借鉴了小鼠胚胎处理、小鼠胚胎成纤维细胞和 胚胎干细胞生产，细胞系基因编辑，细胞系敲除的评估，小鼠模型创建， CRISPR/Cas9项目设计，复杂的项目管理和现有小鼠品系的高效繁殖。通过 将基因编辑细胞系的生产集中在核心1中，可以集中在各个实验室进行研究 下游分析。

PROJECT SUMMARY (Core-1) Genetically engineered cell lines and mouse models are critical for elucidating complex biological processes. The ability to customize the context in which these scientific questions are asked is at an unprecedented level of detail and technical precision. Essentially, any genetic target can be altered to address protein localization, protein-protein interaction or structure-function relationships at endogenous levels of expression and regulation. The Mouse and Cell Modeling Core (Core 1) will create new research materials for the P01 projects and repurpose multiple, established mouse models to generate novel reagents in the way of primary cell lines. With CRISPR/Cas9-based gene editing tools, Core 1 will modify human cell lines to enable the dissection of the BRCA network as described in the individual P01 projects. Key genes will be disrupted in breast cancer and medulloblastoma cell lines and proteins involved in DNA repair and replication stress relief will be modified to disrupt their interaction domains. This comprehensive approach among the investigators will allow exchange of results related to each the projects and inform future directions. Mouse embryonic fibroblasts (MEFs) and embryonic stem (ES) cell lines will be generated to study protein localization to sites of DNA damage and repair efficiency in near wild-type backgrounds, except for the desired mutations. In producing the desired MEFs, genetically matched controls will be produced concomitantly. Commonly used cell lines may have uncharacterized defects in DNA repair pathways, while newly generated MEFs and ES cells are near native state. A unique mouse model will be made by adding to an existing Brca1/Trp53 conditional line a null allele for a strong predicator of chemoresistance. As Brca1, Trp53 and the new target are all located on the same chromosome, CRISPR/Cas9 will be used in embryos derived by in vitro fertilization (IVF) to disrupt the gene without having to do extensive interbreeding to combine the three physically close alleles. Another unique mouse model will be made by deleting the genomic sequence in Brca1 that encodes the binding region of key interaction partner. Core 1 draws on expertise in mouse embryo handling, mouse embryonic fibroblast and embryonic stem cell production, cell line gene editing, evaluation of cell line knock-outs, mouse model creation, CRISPR/Cas9 project design, complex project management and efficient breeding of existing mouse lines. By concentrating production of gene edited cell lines in Core 1, research in individual laboratories can be focused on downstream analyses.