Hearts and bones: the ups and downs of plasticity in stem cell biologyReport as inadecuate

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Published in: Embo Molecular Medicine (ISSN: 1757-4676), vol. 4, num. 5, p. 353-361 Wiley Open Access, 2012

More than a decade ago, plasticity suddenly became a fashionable topic with overemphasized implications for regenerative medicine. The concept of plasticity is supported by old transplantation work, at least for embryonic cells, and metaplasia is a classic example of plasticity observed in patients. Nevertheless, the publication of a series of papers showing rare conversion of a given cell type into another unrelated cell raised the possibility of using any unaffected tissue to create at will new cells to replace a different failing tissue or organ. This resulted in disingenuous interpretations and a reason not to fund anymore research on embryonic stem cells (ESc). Moreover, many papers on plasticity were difficult to reproduce and thus questioned; raising issues about plasticity as a technical artefact or a consequence of rare spontaneous cells fusion. More recently, reprogramming adult differentiated cells to a pluripotent state (iPS) became possible, and later, one type of differentiated cell could be directly reprogrammed into another (e.g. fibroblasts into neurons) without reverting to pluripotency. Although the latter results from different and more robust experimental protocols, these phenomena also exemplify plasticity. In this review, we want to place plasticity in a historical perspective still taking into account ethical and political implications.

Keywords: cell fusion ; ES and iPS cells ; multipotency ; nuclear reprogramming ; plasticity and trans-differentiation ; stem ; progenitor cells ; Skeletal-Muscle ; In-Vivo ; Dopaminergic-Neurons ; Mouse Fibroblasts ; Direct Conversion ; Purkinje Neurons ; Satellite Cells ; Defined Factors ; Mammary-Gland ; Tumor-Cells Reference EPFL-REVIEW-177383doi:10.1002/emmm.201200220View record in Web of Science

Author: Bonfanti, Paola; Barrandon, Yann; Cossu, Giulio

Source: https://infoscience.epfl.ch/record/177383?ln=en

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