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lüll Stem cell plasticity: time for a reappraisal?Lemoli RM; Bertolini F; Cancedda R; De Luca M; Del Santo A; Ferrari G; Ferrari S; Martino G; Mavilio F; Tura SHaematologica 2005[Mar]; 90 (3): 360-81In recent years an increasing number of publications have claimed that adult mammalian stem cells (SC) may be capable of differentiating across tissue lineage boundaries and that this plasticity may represent a novel therapeutic strategy for tissue regeneration. However, after a first phase of excitement, the issue of somatic SC plasticity remains controversial and the therapeutic perspectives are still elusive. In this review, we examine the general mechanisms which govern the function of SC, the identification and functional characterization of adult SC of different tissues and their putative capacity to transdifferentiate into mature cells of different origin. The potential clinical applications of adult SC for regenerative medicine are also discussed in each chapter. The method employed for preparing this review was the informal consensus development. Members of the Working Group on SC met four times and discussed the single points, previously assigned by the Chairman (S.T.), in order to achieve an agreement on different opinions and approve the final manuscript. All the authors of the present review have been working in the field of SC and have contributed original papers to peer-reviewed journals. In addition to the authors' own work, the present review examines articles published in journals covered by the Science Citation Index and Medline.|*Cell Lineage[MESH]|Adult[MESH]|Cell Differentiation[MESH]|Cell Movement[MESH]|Embryo, Mammalian[MESH]|Humans[MESH]|Organ Specificity[MESH]|Regeneration[MESH]|Stem Cell Transplantation[MESH]|Stem Cells/*cytology/physiology[MESH] |