Journal
PIGMENT CELL & MELANOMA RESEARCH
Volume 28, Issue 4, Pages -Publisher
WILEY
DOI: 10.1111/pcmr.12369
Keywords
neurofibromatosis type 1; cafe-au-lait macules; induced pluripotent stem cell; melanocyte; oncogene-induced senescence
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Funding
- German Cancer Aid (Max-Eder Research Group)
- Baden-Wurttemberg Foundation
- German Research Council (DFG)
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Neurofibromatosis type 1 (NF1) is a frequent genetic disease leading to the development of Schwann cell-derived neurofibromas or melanocytic lesions called cafe-au-lait macules (CALMs). The molecular mechanisms involved in CALMs formation remain largely unknown. In this report, we show for the first time pathophysiological mechanisms of abnormal melanocyte differentiation in a human NF1(+/-)-induced pluripotent stem cell (iPSC)-based model. We demonstrate that NF1 patient-derived fibroblasts can be successfully reprogrammed in NF1(+/-) iPSCs with active RAS signaling and that NF1 loss induces senescence during melanocyte differentiation as well as in patient's-derived CALMs, revealing a new role for NF1 in the melanocyte lineage.
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