Forsthoefel David J, Newmark Phillip A
Howard Hughes Medical Institute, Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S. Goodwin Avenue, B107 CLSL, Urbana, IL 61801, United States.
Curr Opin Genet Dev. 2009 Aug;19(4):412-20. doi: 10.1016/j.gde.2009.05.003. Epub 2009 Jul 1.
In the past decade, the planarian has become an increasingly tractable invertebrate model for the investigation of regeneration and stem cell biology. Application of a variety of techniques and development of genomic reagents in this system have enabled exploration of the molecular mechanisms by which pluripotent somatic stem cells called neoblasts replenish, repair, and regenerate planarian tissues and organs. Recent investigations have implicated evolutionarily conserved signaling pathways in the re-establishment of anterior-posterior (A-P), dorsal-ventral (D-V), and medial-lateral (M-L) polarity after injury. These studies have significantly advanced our understanding of early events during planarian regeneration and have raised new questions about the mechanisms of stem cell-based tissue repair and renewal.
在过去十年中,涡虫已成为用于研究再生和干细胞生物学的越来越易于处理的无脊椎动物模型。在这个系统中应用各种技术和开发基因组试剂,使得人们能够探索多能性体细胞干细胞(称为新生细胞)补充、修复和再生涡虫组织和器官的分子机制。最近的研究表明,进化上保守的信号通路参与了损伤后前后(A-P)、背腹(D-V)和内外(M-L)极性的重建。这些研究显著推进了我们对涡虫再生早期事件的理解,并提出了关于基于干细胞的组织修复和更新机制的新问题。