预处理和干细胞存活。
Preconditioning and stem cell survival.
机构信息
Department of Pathology and Laboratory Medicine, University of Cincinnati, 231-Albert, Sabin Way, OH 45267-0529, USA.
出版信息
J Cardiovasc Transl Res. 2010 Apr;3(2):89-102. doi: 10.1007/s12265-009-9161-2. Epub 2009 Dec 22.
The harsh ischemic and cytokine-rich microenvironment in the infarcted myocardium, infiltrated by the inflammatory and immune cells, offers a significant challenge to the transplanted donor stem cells. Massive cell death occurs during transplantation as well as following engraftment which significantly lowers the effectiveness of the heart cell therapy. Various approaches have been adopted to overcome this problem nevertheless with multiple limitations with each of these current approaches. Cellular preconditioning and reprogramming by physical, chemical, genetic, and pharmacological manipulation of the cells has shown promise and "prime" the cells to the "state of readiness" to withstand the rigors of lethal ischemia in vitro as well as posttransplantation. This review summarizes the past and present novel approaches of ischemic preconditioning, pharmacological and genetic manipulation using preconditioning mimetics, recombinant growth factor protein treatment, and reprogramming of stem cells to overexpress survival signaling molecules, microRNAs, and trophic factors for intracrine, autocrine, and paracrine effects on cytoprotection.
在梗死的心肌中,富含细胞因子的恶劣缺血微环境被炎症和免疫细胞浸润,这对移植的供体干细胞构成了重大挑战。在移植过程中和植入后都会发生大量的细胞死亡,这显著降低了心脏细胞治疗的效果。尽管目前的各种方法都有其局限性,但已经采用了多种方法来克服这个问题。通过物理、化学、遗传和药理学手段对细胞进行预处理和重编程,已经显示出了希望,并使细胞“处于准备状态”,能够耐受体外致命性缺血以及移植后的严酷环境。这篇综述总结了过去和现在使用预处理模拟物、重组生长因子蛋白治疗以及通过过表达生存信号分子、microRNA 和营养因子对干细胞进行重编程来实现缺血预处理、药理学和遗传学操作的新方法,这些方法可产生细胞内、自分泌和旁分泌的保护作用。