CORE--EXPERIMENTAL ANIMAL

核心A：实验动物核心 在探索这种脑部肿瘤发病机制的病毒模型时，涉及动物模型的实验是所有三个项目的重要组成部分。为此，本计划实验动物核心项目的目标是支持项目1-3。在这个核心中，我们将重点关注以下五个目标： (I)自发性发展成小脑髓母细胞瘤的JCVT抗原转基因小鼠的产生和维持。这些小鼠将被用来提供肿瘤组织，以供分析和治疗，如个别项目所述。 (Ii)转基因和基因敲除小鼠新品系的产生和分析。将产生可诱导的JCVT抗原转基因，以及带有突变的P53或β-连环蛋白的小鼠。JCVT抗原转基因小鼠将与P53和Rb家族成员等肿瘤抑制基因缺失的小鼠杂交。 (3)沿裸鼠或同基因小鼠的侧翼接种已建立的细胞系，用于对项目1-3概述的治疗策略进行体内评估。 (4)将已建立的细胞系移植到裸鼠或同基因小鼠的脑实质内，用于对项目1-3概述的治疗策略进行体内评估。 (V)沿裸鼠侧翼接种肿瘤组织或细胞系，以评估成瘤性。 肿瘤组织将被切除并传递到核心B进行分析和建立细胞系，以便分配到项目1-3。

Core A: Experimental Animal Core In exploring this viral model for tumor pathogenesis in the brain, experiments involving animal models are an essential component in all three projects. Thoward this end, the goal of the Experimental Animal Core of this program is to support Projects 1 - 3. In this core, we will focus on the following five goals: (i) Generation and maintenance of JCV T-antigen transgenic mice which spontaneously develop cerebellar medulloblastomas. The mice will be utilized to provide tumor tissue for analysis and for therapeutic treatment as outlined in the individual projects. (ii) Generation and analysis of new lines of transgenic and knockout mice. Inducible JCV T-antigen transgenic will be generated, as well as mice with mutant p53 or beta-catenin. JCV T-antigen transgenic mice will be crossed with mice lacking tumor suppressors such as p53 and Rb family members. (iii) Inoculation of established cell lines along the flanks of Nude mice or syngeneic mice for in vivo evaluation of therapeutic strategies as outlined in Projects 1-3. (iv) Transplantation of established cell lines within the brain parenchyma of Nude or syngeneic mice for in vivo evaluation of therapeutic strategies as outlined in Projects 1-3. (v) Inoculation of either tumor tissue or cell lines along the flanks of Nude mice to evaluate tumorigenecity. Tumor tissue will be excised and passed to Core B for analysis and establishment of cell lines for distribution to Projects 1-3.