ASPECTS OF UTERINE CELL CYCLE REGULATION IN IMPLANTATION

着床过程中子宫细胞周期调节的各个方面

• 批准号: 6628901
• 负责人: SANJOY K. DAS
• 金额: $ 12.73万
• 依托单位: VANDERBILT UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-15 至 2006-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6628901
• 关键词: cell cycle; cell differentiation; cell growth regulation; cyclin dependent kinase; cyclins; decidua; embryo implantation; enzyme activity; enzyme complex; enzyme inhibitors; epidermal growth factor; flow cytometry; gene expression; immunocytochemistry; immunoprecipitation; in situ hybridization; laboratory mouse; messenger RNA; northern blottings; phosphorylation; polyploidy; protein structure function; stromal cells; tissue /cell culture; western blottings

DESCRIPTION: (Adapted from the applicant's abstract) The process of embryo implantation is associated with uterine stromal cell decidualization, an event that is critical to the success of pregnancy. The decidualization process is characterized by stromal cell growth and transformation into decidual cells, and formation of stromal cell polyploidy which occurs due to endoreduplication without cell division. The process of cellular division is tightly regulated in the cell cycle at two particular checkpoints, G1-S and G2-M. Several cell cyclins (A, B, D and E type cyclins) are known to play key roles with regard to cellular growth in a phase specific manner during these transitions. In this regard, the PI has recently demonstrated that the upregulation of cyclin D3 is tightly associated with decidualization of the uterus. It is well accepted that the dynamic control of the cell cycle is executed by an interplay of cyclins, cyclin-dependent kinases (cdks) and cdk inhibitors (CKIs). The objectives of this revised application are to focus on the cell cycle regulators that participate in the onset and progression of decidualization aspects of the implantation process. The hypothesis is that cell cycle regulators are expressed in the uterus in a spatiotemporal manner and their coordinated interactions play key roles in these processes. The specific aims are: 1) To characterize the spatiotemporal expression of cyclins (A, B, D2 and E), cdks (cdk1, cdk2, cdk4 and cdk6) and CKIs (p27 and p21) in the periimplantation (days 1-8) uterus of wild-type mice; 2) To study the role of cell cycle molecules in decidualization and the effects of the EGF family of growth factors in this process; 3) To study the regulation and functional status of cdks, respective cyclins and CKIs in the uterus during implantation and decidualization in cyclin D2, D3 or p27 null mice; and 4) To assess the status of cyclins (A, B, D2, D3 and E), cdks (cdk1, cdk2, cdk4 and cdk6) and CKIs (p27 and p21) in the uteri of Hoxa-10 null mice. The investigators will characterize mRNA expression by Northern and in situ hybridization and protein expression by immunohistochemistry, Western blotting and immunoprecipitation. The functional activity of cyclin-cdk-CKI associated complexes will be determined by in vitro phosphorylation activity. The results obtained from these studies will provide important insights regarding the potential roles of key cell cycle regulators in uterine biology during implantation and decidualization. Since these processes are analogous to pseudomalignancy, the results should also provide basic information relevant to cancer biology.

描述：（改编自申请人的摘要）胚胎的过程 着床与子宫基质细胞蜕膜化有关，这是一个事件 这对于怀孕的成功至关重要。蜕膜化过程是 其特征是基质细胞生长并转化为蜕膜细胞， 由于核内复制而形成基质细胞多倍体 没有细胞分裂。细胞分裂过程受到严格调控 细胞周期的两个特定检查点：G1-S 和 G2-M。几个细胞 已知细胞周期蛋白（A、B、D 和 E 型细胞周期蛋白）在以下方面发挥关键作用： 在这些转变过程中细胞以特定阶段的方式生长。在这个 就此而言，PI最近证明cyclin D3的上调是 与子宫蜕膜化密切相关。人们普遍认为 细胞周期的动态控制是通过细胞周期蛋白的相互作用来执行的， 细胞周期蛋白依赖性激酶 (cdks) 和 cdk 抑制剂 (CKI)。的目标 该修订后的申请将重点关注细胞周期调节剂 参与蜕膜化方面的发生和进展 植入过程。假设细胞周期调节因子是 在子宫中以时空方式表达及其协调 相互作用在这些过程中发挥着关键作用。具体目标是： 1) 表征细胞周期蛋白（A、B、D2 和 E）、cdks 的时空表达 植入周围的（cdk1、cdk2、cdk4 和 cdk6）和 CKI（p27 和 p21） (第1-8天)野生型小鼠的子宫； 2) 研究细胞周期的作用 蜕膜化分子和 EGF 家族生长的影响 这个过程中的因素； 3）研究其调控及功能状态 着床期间子宫中的 cdks、各自的细胞周期蛋白和 CKI 细胞周期蛋白 D2、D3 或 p27 缺失小鼠的蜕膜化； 4) 评估状况 细胞周期蛋白（A、B、D2、D3 和 E）、cdks（cdk1、cdk2、cdk4 和 cdk6）和 CKI（第 27 页） 和 p21) 在 Hoxa-10 无效小鼠的子宫中。调查人员将描述 通过 Northern 和原位杂交检测 mRNA 表达，通过 免疫组织化学、蛋白质印迹和免疫沉淀。功能性的 细胞周期蛋白-cdk-CKI相关复合物的活性将通过体外测定 磷酸化活性。从这些研究中获得的结果将提供 关于关键细胞周期调节因子潜在作用的重要见解 着床和蜕膜化过程中的子宫生物学。由于这些 过程类似于假性恶性肿瘤，结果还应提供 与癌症生物学相关的基本信息。