02278nas a2200181   4500008004100000020002300041245005900064210005800123260005200181300001400233490000600247520170800253100001601961700002101977700002401998700001702022856005702039       2015                        eng d  a2005-36062005-544700aPlanarians: an In Vivo Model for Regenerative Medicine0 aPlanarians an In Vivo Model for Regenerative Medicine  bKorean Society for Stem Cell Researchc2015/11/  a128 - 1330 v83 a<p>The emergence of regenerative medicine has raised the hope of treating an extraordinary range of disease and serious injuries. Understanding the processes of cell proliferation, differentiation and pattern formation in regenerative organisms could help find ways to enhance the poor regenerative abilities shown by many other animals, including humans. Recently, planarians have emerged as an attractive model in which to study regeneration. These animals are considering as in vivo plate, during which we can study the behavior and characristics of stem cells in their own niche. A variety of characteristic such as: simplicity, easy to manipulate experimentally, the existence of more than 100 years of literature, makes these animals an extraordinary model for regenerative medicine researches. Among planarians free-living freshwater hermaphrodite Schmidtea mediterranea has emerged as a suitable model system because it displays robust regenerative properties and, unlike most other planarians, it is a stable diploid with a genome size of about 4.8&times;10(8) base pairs, nearly half that of other common planarians. Planarian regeneration involves two highly flexible systems: pluripotent neoblasts that can generate any new cell type and muscle cells that provide positional instructions for the regeneration of anybody region. neoblasts represent roughly 25~30 percent of all planarian cells and are scattered broadly through the parenchyma, being absent only from the animal head tips and the pharynx. Two models for neo-blast specification have been proposed; the naive model posits that all neoblasts are stem cells with the same potential and are a largely homogeneous population.</p>
1 aKarami, Ali1 aTebyanian, Hamid1 aGoodarzi, Vahabodin1 aShiri, Sajad  uhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC4651277/