Hematopoietic potential of histocompatible embryonic stem cell lines

项目总结（见说明）： 本研究的目标是创造组织相容的患者特异性造血干细胞，除了其潜在的治疗价值外，还将为深入研究重编程和分化提供新的工具。具体目标1：利用小鼠微细胞介导的染色体转移（mmct）产生组织相容性mmctES细胞。具体目的2：通过体外和体内方法测试mmctES细胞的造血潜能。核移植（nt）ES和孤雌生殖（p）ES细胞技术所需的人卵母细胞的有限可用性对产生定制的胚胎干细胞构成了重大障碍。因此，需要产生类似类型的细胞的替代方法。通过体细胞（sc）和胚胎干细胞（es）融合以重编程体细胞已经证明了通过无卵母细胞方法产生ES细胞。然而，尚未实现从所得四倍体sc-es杂交ES细胞中去除遗传物质以制备二倍体ES细胞。作为一种替代方法，我建议微细胞介导的转移到ES细胞的小鼠SC染色体17和人类SC染色体6，其中包含主要组织相容性复合体（MHC）。然后将得到的复制的小鼠es-染色体17和人sc-染色体6去除以在小鼠中制备二倍体mmctES细胞。

PROJECT SUMMARY (See instructions): The goal of this research is to create histocompatible patient specific hematopoietic stem cells, which in addition to their potential therapeutic value, will provide novel tools for in-depth study of reprogramming and differentiation. The Specific Aims of this proposal are: Specific Aims 1: Generation of histocompatible mmctES cells using microcell mediated chromosome transfer (mmct) in mouse. Specific Aim 2: Testing of hematopoietic potential in mmctES cells by in vitro and in vivo methods. The limited availability of human oocytes required for both nuclear transferred (nt) ES and parthenogenetic (p) ES cell techniques poses a significant obstacle to generating customized embryonic stem cells. Therefore, alternative methods to generate similar types of cells are needed. Generation of ES cells by oocyte free methods already has been demonstrated by fusion of somatic cells (sc) and embryonic stem (es) cells to reprogram the somatic cells. However, removal of the genetic material from the resultant tetraploid sc-es hybrid ES cells to make diploid ES cells has not been achieved. As an alternative approach, I propose microcell-mediated transfer to ES cells of mouse sc-chromosome 17 and human sc-chromosome 6, which contain the major histocompatibility complex (MHC). The resultant duplicated mouse es-chromosome 17 and human sc-chromosome 6 will then be removed to make diploid mmctES cells in mouse