TY - JOUR
T1 - Kruppel-like factor-9 (KLF9) inhibits glioblastoma stemness through global transcription repression and integrin α6 inhibition
AU - Ying, Mingyao
AU - Tilghman, Jessica
AU - Wei, Yingying
AU - Guerrero-Cazares, Hugo
AU - Quinones-Hinojosa, Alfredo
AU - Ji, Hongkai
AU - Laterra, John
N1 - Publisher Copyright:
© 2014 by The American Society for Biochemistry and Molecular Biology, Inc.
PY - 2014/11/21
Y1 - 2014/11/21
N2 - It is increasingly important tounderstandthe molecular basis for the plasticity of neoplastic cells and their capacity to transition between differentiated and stemlike phenotypes. Kruppel-like factor-9 (KLF9), a member of the large KLF transcription factor family, has emerged as a regulator of oncogenesis, cell differentiation, and neural development; however, the molecular basis for the diverse contextual functions of KLF9 remains unclear. This study focused on the functions of KLF9 in human glioblastoma stemlike cells. We established for the first time a genome-wide map of KLF9-regulated targets in human glioblastoma stemlike cells and show that KLF9 functions as a transcriptional repressor and thereby regulates multiple signaling pathways involved in oncogenesis and stem cell regulation. A detailed analysis of one such pathway, integrin signaling, showed that the capacity of KLF9 to inhibit glioblastoma cell stemness and tumorigenicity requires ITGA6 repression. These findings enhance our understanding of the transcriptional networks underlying cancer cell stemness and differentiation and identify KLF9-regulated molecular targets applicable to cancer therapeutics.
AB - It is increasingly important tounderstandthe molecular basis for the plasticity of neoplastic cells and their capacity to transition between differentiated and stemlike phenotypes. Kruppel-like factor-9 (KLF9), a member of the large KLF transcription factor family, has emerged as a regulator of oncogenesis, cell differentiation, and neural development; however, the molecular basis for the diverse contextual functions of KLF9 remains unclear. This study focused on the functions of KLF9 in human glioblastoma stemlike cells. We established for the first time a genome-wide map of KLF9-regulated targets in human glioblastoma stemlike cells and show that KLF9 functions as a transcriptional repressor and thereby regulates multiple signaling pathways involved in oncogenesis and stem cell regulation. A detailed analysis of one such pathway, integrin signaling, showed that the capacity of KLF9 to inhibit glioblastoma cell stemness and tumorigenicity requires ITGA6 repression. These findings enhance our understanding of the transcriptional networks underlying cancer cell stemness and differentiation and identify KLF9-regulated molecular targets applicable to cancer therapeutics.
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U2 - 10.1074/jbc.M114.588988
DO - 10.1074/jbc.M114.588988
M3 - Article
C2 - 25288800
AN - SCOPUS:84911477779
SN - 0021-9258
VL - 289
SP - 32742
EP - 32756
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 47
ER -