Open AccessKrüppel-Like Factor 6 Is Required for Oxidative and Oncogene-Induced Cellular Senescence
Author(s) -
Han Chen,
Andrés M. Castellaro,
Ana C. Racca,
Sofía Carbajosa González,
María Florencia Pansa,
Gastón Soria,
José Luis Bocco
Publication year - 2019
Publication title -
frontiers in cell and developmental biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.452
H-Index - 53
ISSN - 2296-634X
DOI - 10.3389/fcell.2019.00297
Subject(s) - senescence , microbiology and biotechnology , biology , transcription factor , gene silencing , carcinogenesis , ectopic expression , neoplastic transformation , malignant transformation , cancer research , oncogene , cell cycle , cell growth , suppressor , cell , genetics , cell culture , cancer , gene
Krüppel-like factor 6 (KLF6) is a transcription factor involved in the regulation of several cellular processes. Regarding its role in tumorigenesis, KLF6 is considered a tumor suppressor. Numerous reports demonstrate its frequent genomic loss or down-regulation, implying a functional inactivation in a broad range of human cancers. Previous work from our laboratory showed that the down-regulation of KLF6 expression in normal fibroblasts leads to cellular transformation, while its ectopic expression interferes with the oncogenic transformation triggered by activated Ras through a cell cycle arrest. We hypothesize that the growth suppressor activity of KLF6 may involve the induction of cellular senescence thereby helping to prevent the proliferation of cells at risk of neoplastic transformation. Here, we explored the association of KLF6 up-regulation in two different cellular senescence scenarios. We found that KLF6 silencing bypasses both oxidative and oncogene-induced senescence. In this context, KLF6 expression per se was capable to trigger cellular senescence in both normal and tumoral contexts. As such, the findings presented in this report provide insights into a potential mechanism by which KLF6 may play a suppressing role of uncontrolled or damaged cell proliferation.