2014
DOI: 10.1016/j.toxlet.2014.03.020
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The acquisition of cancer stem cell-like properties and neoplastic transformation of human keratinocytes induced by arsenite involves epigenetic silencing of let-7c via Ras/NF-κB

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Cited by 59 publications
(44 citation statements)
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“…In a separate report, it was demonstrated that acute exposure of HaCaT keratinocytes to arsenite, p21waf1/Cip1 was up-regulated and Notch1 was down-regulated, favoring the Notch1 contribution on arsenic-induced keratinocyte transformation and cancerogenesis [78]. In addition, it was reported that arsenite induced epigenetic silencing of let-7c via Ras/NF-κB that is involved in the acquisition of cancer stem cell-like properties and neoplastic transformation of HaCaT cells, which contribute to the tumorigenesis [79]. …”
Section: Discussionmentioning
confidence: 99%
“…In a separate report, it was demonstrated that acute exposure of HaCaT keratinocytes to arsenite, p21waf1/Cip1 was up-regulated and Notch1 was down-regulated, favoring the Notch1 contribution on arsenic-induced keratinocyte transformation and cancerogenesis [78]. In addition, it was reported that arsenite induced epigenetic silencing of let-7c via Ras/NF-κB that is involved in the acquisition of cancer stem cell-like properties and neoplastic transformation of HaCaT cells, which contribute to the tumorigenesis [79]. …”
Section: Discussionmentioning
confidence: 99%
“…ALDH was found to play an important role in self-protection, differentiation, and expansion of CSCs and confer resistance to specific chemotherapy drugs such as cyclophosphamide and gemcitabine (Ma and Allan 2011;Abdullah and Chow 2013). In addition to those proteins overexpressed, some key signaling pathways are critical for CSC survival and drug resistance, including JAK/STAT (Abubaker et al 2014), Notch (Abel et al 2014), Sonic Hedgehog (SHH) , WNT (Cai et al 2013), MAPK/ERK (Ahn et al 2013), NF-jB (Jiang et al 2014) and TGF-b (Oktem et al 2014) pathways (Table 2). Among them, Notch, WNT and SHH pathways are the most common in CSCs and are known to contribute drug resistance (Abdullah and Chow 2013).…”
Section: Drug Resistance Mechanisms In Cscsmentioning
confidence: 99%
“…A ativação oncogênica de KRAS por mutação, não só está associada a um pior prognóstico clínico em câncer de pulmão (Adjei, 2008), mas não existem terapias efetivas para pacientes portadores de mutações oncogênicas em KRAS (McCormick, 2016). Finalmente, as vias induzidas pela ativação oncogênica da KRAS promovem o fenótipo tronco-tumoral de CITs em outros tipos de neoplasias Kim et al, 2010;Jiang et al, 2014), sugerindo esta via oncogênica como uma via central para a biologia das CITs e uma via racional para intervenção terapêutica.…”
Section: Discussionunclassified
“…A KRAS oncogênica está associada à transição epitelial-mesequimal ), uma característica relacionada ao fenótipo tronco tumoral. Além disso, RAS contribui para a manutenção e expansão de CITs em um modelo murino de câncer de mama, em células tumorais mamárias humanas e em queratinócitos Kim et al, 2010;Jiang et al, 2014). Em queratinócitos, a via utilizada para promoção de características tronco tumorais envolve o fator de transcrição NF-κB (Jiang et al, 2014).…”
Section: Cits E Krasunclassified
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