生物谷報道:美國麥迪遜威斯康辛大學的華裔科學家張張?zhí)K俊(譯音,Su-Chun Zhang)領導的一個研究小組,,日前研究出一項“食譜”――把人類胚胎干細胞引入人類細胞之中,,就可在人體內激活某些細胞的生長,,從而達到治病的功效。
張?zhí)K俊領導的小組研究了兩年,,最后找出這張“食譜”,。他們的研究是將干細胞引入人的腦細胞中,因為腦細胞具有控制人體動作的功能,。
據美國世界新聞網報道,,科學家指出,,張?zhí)K俊的發(fā)現有兩項重要意義:第一,科學家研究了動物干細胞很長時間,,但始終無法找到引導干細胞的辦法,,張?zhí)K俊的發(fā)現證明,借著把干細胞引進人類的一些細胞中,,就可產生引導干細胞的作用,。哈佛大學神經科學家奧爾·艾薩克森指出,張?zhí)K俊的發(fā)現有助科學家把過去25年研究動物干細胞所得的資料轉化為人類干細胞的資料,,因此貢獻很大,。
第二,張?zhí)K俊的研究還發(fā)現,,“食譜”是否成功――即是否能夠引導干細胞,,除了“食譜”組成的元素(例如不同的干細胞和不同的人類細胞)和數量外,還必須在適當時間內進行調制,。時間性的掌握極為重要,。科學家說,,這項發(fā)現很重要,,因為人體自有生理時鐘,不同時間有不同狀態(tài),,張?zhí)K俊的發(fā)現,,使科學家知道,必須留意時間,,不再像以前那樣,,以為隨時都可以進行實驗。
張?zhí)K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: [email protected]
Web: http://www.news.wisc.edu/packages/stemcells/