报告题目:The Study of Pluripotency and Reprogramming of Stem Cells
报告人: 肖 磊 博 士
永利yl23411官网登录动物科学学院教授,博导, Stem Cell Review编委
时 间: 2011年3月10日(星期四)下午4点
地 点: 医学院综合楼205报告厅
个人简介:
1997.9-2000.6 中国科学院上海细胞所马普客座实验室,研究生。完成NDST-1基因konck-out工作。2000.9-2003.7德国慕尼黑大学生物系,博士。用转基因的方法研究MyoD基因的在胚胎发育过程中的表达调控及中胚层发育。2003.10-2005.9美国约翰•霍普金斯大学医学院,博士后。研究人类胚胎干细胞多能性的维持机理及分化方法。2005.10-2010.9上海生化细胞所课题组长。2010.9--至今永利yl23411官网登录动物科学学院教授,博导。
研究方向:胚胎干细胞
1. iPS cell technology.
Human iPS cells should be useful for studying the mechanisms of somatic cell reprogramming, the generation of patient-specific stem cell lines for studying various disease mechanisms and eventual transplantation therapies. We are focusing to improve the technology to eliminate the genomic integration of the virus vector.
(1) iPS细胞技术
人类iPS细胞的建立被公认为近年最重要的科技进展之一。这项技术不仅可以从体细胞建立个体特异的多能干细胞系,解决了细胞移植治疗中的免疫排斥问题,而且为研究人类细胞的重编程的机理,研究个体特异的疾病发生机理提供了有力的方法。目前我们实验室的研究重点是改进技术,避免病毒插入基因组造成突变和成瘤,建立完全正常的iPS细胞系。并且阐明iPS细胞重编程的机理。
(1) iPS细胞技术
人类iPS细胞的建立被公认为近年最重要的科技进展之一。这项技术不仅可以从体细胞建立个体特异的多能干细胞系,解决了细胞移植治疗中的免疫排斥问题,而且为研究人类细胞的重编程的机理,研究个体特异的疾病发生机理提供了有力的方法。目前我们实验室的研究重点是改进技术,避免病毒插入基因组造成突变和成瘤,建立完全正常的iPS细胞系。并且阐明iPS细胞重编程的机理。
2. Human embryonic stem cells (hESCs) self-renew indefinitely while maintaining pluripotency. The molecular mechanism underlying hESCs self-renewal and pluripotency is poorly understood. Our lab is planning to analyze the function of different signal pathways in maintaining the stemness of human embryonic stem cells. The signal pathways we are going to check include Wnt, BMP, FGF, TGF-beta, et al.. We expect that our study will provide more information about how the stemness is maintained in human ES cells.
(2)人类胚胎干细胞/iPS细胞多能性维持及定向分化方法及机理研究
人胚胎干细胞/iPS细胞能够维持其多能性并进行自我更新。关于人胚胎干细胞/iPS细胞维持其自我更新和多能性的分子机制的认识目前还很有限。我们实验室计划研究各种信号通路在维持人类胚胎干细胞/iPS细胞的多能性方面的功能。这些信号包括Nodal/Activin, FGF和BMP等。我们的研究工作将为阐明各种信号通路对于维持人类胚胎干细胞/iPS细胞多能性的作用,从而筛选到合适的生长因子,对培养条件进行优化,为人类胚胎干细胞/iPS细胞应用在临床打下基础。同时,我们计划面向大众健康的需求,建立人类胚胎干细胞/iPS细胞向特定组织器官分化的方法。
人胚胎干细胞/iPS细胞能够维持其多能性并进行自我更新。关于人胚胎干细胞/iPS细胞维持其自我更新和多能性的分子机制的认识目前还很有限。我们实验室计划研究各种信号通路在维持人类胚胎干细胞/iPS细胞的多能性方面的功能。这些信号包括Nodal/Activin, FGF和BMP等。我们的研究工作将为阐明各种信号通路对于维持人类胚胎干细胞/iPS细胞多能性的作用,从而筛选到合适的生长因子,对培养条件进行优化,为人类胚胎干细胞/iPS细胞应用在临床打下基础。同时,我们计划面向大众健康的需求,建立人类胚胎干细胞/iPS细胞向特定组织器官分化的方法。
3. Differentiate human embryonic stem cells into desired tissue cells. Methods should be established to differentiate human ES cells into specific lineages for transplantation therapy in the future, e.g. hematopoietic stem cells, insulin secreted pancreas beta cells, liver cells, et. al.. Our lab is planning to establish the differentiation protocol which will facilitate the study of human embryonic stem cells.
(3)人类胚胎干细胞/iPS细胞的移植治疗
人类胚胎干细胞/iPS细胞应用于临床的前提是验证其有效性和安全型。我们计划用免疫缺陷小鼠移植模型验证人类胚胎干细胞/iPS细胞分化来的组织特异细胞的有效性和安全性,将来用于病人的临床治疗。
(4)基于猪iPS细胞建立猪的遗传操作技术
基于猪iPS细胞建立基因精确修饰的转基因猪或基因敲除猪。猪是目前最理想的异种器官移植供体,基于猪iPS细胞进行基因打靶,敲除免疫原性基因,可以建立作为异种器官移植供体的基因精确修饰猪。基因精确修饰的转基因猪还可用于建立人类疾病模型、改良品系、建立抗病猪品系、开发生物反应器等。
(3)人类胚胎干细胞/iPS细胞的移植治疗
人类胚胎干细胞/iPS细胞应用于临床的前提是验证其有效性和安全型。我们计划用免疫缺陷小鼠移植模型验证人类胚胎干细胞/iPS细胞分化来的组织特异细胞的有效性和安全性,将来用于病人的临床治疗。
(4)基于猪iPS细胞建立猪的遗传操作技术
基于猪iPS细胞建立基因精确修饰的转基因猪或基因敲除猪。猪是目前最理想的异种器官移植供体,基于猪iPS细胞进行基因打靶,敲除免疫原性基因,可以建立作为异种器官移植供体的基因精确修饰猪。基因精确修饰的转基因猪还可用于建立人类疾病模型、改良品系、建立抗病猪品系、开发生物反应器等。
Selected Publications
1. Zhao Wu*, Jijun Chen*, Jiangtao Ren, Lei Bao, Jing Liao, Chun Cui, Linjun Rao, Hui Li, Yijun Gu, Huiming Dai, Hui Zhu, Xiaokun Teng, Lu Cheng, Lei Xiao. (2009) Generation of Pig-Induced Pluripotent Stem Cells with a Drug-Inducible System. J Mol Cell Biol. * Joint first author.
2. Lu Cheng, Lei Xiao. * (2009) Pig induced pluripotent stem cells: a new resource for generating gnetically modified pigs. Regenerative Medicine. 4(6):787-9.
3. Jing Liao*, Chun Cui*, Siye Chen, Jiangtao Ren, Jijun Chen, Yuan Gao, Hui Li, Nannan Jia, Lu Cheng, Huasheng Xiao, and Lei Xiao. (2009) Generation of induced pluripotent stem cell lines from adult rat cells. Cell Stem Cell. 4(1):11-15. * Joint first author.
4. Chun Cui, Lingjun Rao, Linzhao Cheng & Lei Xiao. Generation and application of human iPS cells. (2009) Chinese Science Bulletin. 54, 9-13.
5. Zhao Wu*, Wei Zhang*, Guibin Chen, Lu Cheng, Jing Liao, Nannan Jia, Yuan Gao, Huiming Dai, Jinduo Yuan, Linzhao Cheng, and Lei Xiao. (2008) Combinatorial signals of activin/nodal and bone morphogenic protein regulate the early lineage segregation of human embryonic stem cells. J Biol Chem. 283, 24991-25002. * Joint first author.
2. Lu Cheng, Lei Xiao. * (2009) Pig induced pluripotent stem cells: a new resource for generating gnetically modified pigs. Regenerative Medicine. 4(6):787-9.
3. Jing Liao*, Chun Cui*, Siye Chen, Jiangtao Ren, Jijun Chen, Yuan Gao, Hui Li, Nannan Jia, Lu Cheng, Huasheng Xiao, and Lei Xiao. (2009) Generation of induced pluripotent stem cell lines from adult rat cells. Cell Stem Cell. 4(1):11-15. * Joint first author.
4. Chun Cui, Lingjun Rao, Linzhao Cheng & Lei Xiao. Generation and application of human iPS cells. (2009) Chinese Science Bulletin. 54, 9-13.
5. Zhao Wu*, Wei Zhang*, Guibin Chen, Lu Cheng, Jing Liao, Nannan Jia, Yuan Gao, Huiming Dai, Jinduo Yuan, Linzhao Cheng, and Lei Xiao. (2008) Combinatorial signals of activin/nodal and bone morphogenic protein regulate the early lineage segregation of human embryonic stem cells. J Biol Chem. 283, 24991-25002. * Joint first author.
6. Jing Liao*, Zhao Wu*, Ying Wang, Lu Cheng, Chun Cui, Yuan Gao, Taotao Chen, Lingjun Rao, Siye Chen,Nannan Jia, Huiming Dai, Shunmei Xin, Jiuhong Kang, Gang Pei, Lei Xiao. (2008) Enhanced efficiency of generating induced pluripotent stem (iPS) cells from human somatic cells by a combination of six transcription factors. Cell Res. 18, 600-603. * Joint first author.
7. Xiao, L., Yuan, X., and Sharkis, S. J. (2006) Activin A maintains self-renewal and regulates fibroblast growth factor, Wnt, and bone morphogenic protein pathways in human embryonic stem cells. Stem Cells. 24, 1476-1486.
8. Fan, G.*, Xiao, L.*, Cheng, L., Wang, X., Sun, B., and Hu, G. (2000) Targeted disruption of NDST-1 gene leads to pulmonary hypoplasia and neonatal respiratory distress in mice. FEBS Lett. 467, 7-11. * Joint first author.
7. Xiao, L., Yuan, X., and Sharkis, S. J. (2006) Activin A maintains self-renewal and regulates fibroblast growth factor, Wnt, and bone morphogenic protein pathways in human embryonic stem cells. Stem Cells. 24, 1476-1486.
8. Fan, G.*, Xiao, L.*, Cheng, L., Wang, X., Sun, B., and Hu, G. (2000) Targeted disruption of NDST-1 gene leads to pulmonary hypoplasia and neonatal respiratory distress in mice. FEBS Lett. 467, 7-11. * Joint first author.