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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 NPJ+Syst+Biol+Appl
2018 ; 4
(ä): 24
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A network of epigenomic and transcriptional cooperation encompassing an
epigenomic master regulator in cancer
#MMPMID29977600
Wilson S
; Filipp FV
NPJ Syst Biol Appl
2018[]; 4
(ä): 24
PMID29977600
show ga
Coordinated experiments focused on transcriptional responses and chromatin states
are well-equipped to capture different epigenomic and transcriptomic levels
governing the circuitry of a regulatory network. We propose a workflow for the
genome-wide identification of epigenomic and transcriptional cooperation to
elucidate transcriptional networks in cancer. Gene promoter annotation in
combination with network analysis and sequence-resolution of enriched
transcriptional motifs in epigenomic data reveals transcription factor families
that act synergistically with epigenomic master regulators. By investigating
complementary omics levels, a close teamwork of the transcriptional and
epigenomic machinery was discovered. The discovered network is tightly connected
and surrounds the histone lysine demethylase KDM3A, basic helix-loop-helix
factors MYC, HIF1A, and SREBF1, as well as differentiation factors AP1, MYOD1,
SP1, MEIS1, ZEB1, and ELK1. In such a cooperative network, one component opens
the chromatin, another one recognizes gene-specific DNA motifs, others scaffold
between histones, cofactors, and the transcriptional complex. In cancer, due to
the ability to team up with transcription factors, epigenetic factors concert
mitogenic and metabolic gene networks, claiming the role of a cancer master
regulators or epioncogenes. Significantly, specific histone modification patterns
are commonly associated with open or closed chromatin states, and are linked to
distinct biological outcomes by transcriptional activation or repression.
Disruption of patterns of histone modifications is associated with the loss of
proliferative control and cancer. There is tremendous therapeutic potential in
understanding and targeting histone modification pathways. Thus, investigating
cooperation of chromatin remodelers and the transcriptional machinery is not only
important for elucidating fundamental mechanisms of chromatin regulation, but
also necessary for the design of targeted therapeutics.