生物谷报道:美国麦迪逊威斯康辛大学的华裔科学家张张苏俊(译音,Su-Chun Zhang)领导的一个研究小组,日前研究出一项“食谱”――把人类胚胎干细胞引入人类细胞之中,就可在人体内激活某些细胞的生长,从而达到治病的功效。
张苏俊领导的小组研究了两年,最后找出这张“食谱”。他们的研究是将干细胞引入人的脑细胞中,因为脑细胞具有控制人体动作的功能。
据美国世界新闻网报道,科学家指出,张苏俊的发现有两项重要意义:第一,科学家研究了动物干细胞很长时间,但始终无法找到引导干细胞的办法,张苏俊的发现证明,借着把干细胞引进人类的一些细胞中,就可产生引导干细胞的作用。哈佛大学神经科学家奥尔·艾萨克森指出,张苏俊的发现有助科学家把过去25年研究动物干细胞所得的资料转化为人类干细胞的资料,因此贡献很大。
第二,张苏俊的研究还发现,“食谱”是否成功――即是否能够引导干细胞,除了“食谱”组成的元素(例如不同的干细胞和不同的人类细胞)和数量外,还必须在适当时间内进行调制。时间性的掌握极为重要。科学家说,这项发现很重要,因为人体自有生理时钟,不同时间有不同状态,张苏俊的发现,使科学家知道,必须留意时间,不再像以前那样,以为随时都可以进行实验。
张苏俊研究方向:
The remarkable developmental potential and replicative capacity of human embryonic stem (ES) cells promise an almost unlimited supply of specific cell types for transplant therapies. Key to this powerful application is the differentiation and isolation of specific cell lineages from pluripotent ES cells. Our laboratory focuses on the neural pathway of ES cell differentiation. We have established an in vitro model of ES cell differentiation to neuroepithelial cells, which are organized in a neural tube-like structure. Using this system, we ask what controls neuroepithelial specification from ES cells and how the neuroepithelia organize into a neural tube. We will then examine whether a regionally specific neural cell type can be patterned in vitro by dorso-ventral and rostro-caudal signals. We are particularly interested in the ventral neural cell types, e.g., retinal ganglion neurons, midbrain dopamine neurons, spinal cord motoneurons and myelinating oligodendrocytes. The ES cell-derived neural cells will be evaluated for their therapeutic potential in animal models including monkey models for spinal cord injury (neuroepithelia) and neurodegenerative disorders such as Parkinson's disease (dopamine neurons), ALS (motoneurons) and MS (oligodendrocytes).
Su-Chun Zhang
M.D., Wenzhou Medical College
PhD, University of Saskatchewan
Assistant Professor of Anatomy and Neurology
Contact Information
Waisman Center
UW-Madison
1500 Highland Avenue
Madison, WI 53705
608-265-2543
608-263-5267 (fax)
E-mail: zhang@waisman.wisc.edu
Web: http://www.news.wisc.edu/packages/stemcells/