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Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Small+GTPases 2016 ; 7 (3): 147-55 Nephropedia Template TP
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Oncogenic Ras: A double-edged sword for human epidermal stem and transient amplifying cells #MMPMID27111451
Dellambra E
Small GTPases 2016[Jul]; 7 (3): 147-55 PMID27111451show ga
The human epidermal clonal evolution, i.e. the transition from stem cells (SCs) to transient amplifying (TA)-cells and post-mitotic cells, is a continuous and tightly regulated process that ensures physiologic tissue homeostasis. The Ras family of small GTPases has a key role in skin homeostasis and tumorigenesis. Indeed, activating mutations in Ras genes have been found in human cutaneous squamous cell carcinomas (cSCCs) and in experimentally-induced murine cSCCs. In mouse models, the Ras signaling might lead to hyperproliferative phenotypes, including the development of cSCCs, depending on the nature of the founding cells. Tumor-initiating cells or Cancer Stem Cells (CSCs) have been demonstrated in murine and human cSCCs even if the mechanism of their development from normal SCs or TA-cells is not completely elucidated. Here, the relation between the Ras expression outcome and the clonogenic potential of the target keratinocyte is discussed.