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2017 ; 7
(1
): 2186
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Super-Enhancers and Broad H3K4me3 Domains Form Complex Gene Regulatory Circuits
Involving Chromatin Interactions
#MMPMID28526829
Cao F
; Fang Y
; Tan HK
; Goh Y
; Choy JYH
; Koh BTH
; Hao Tan J
; Bertin N
; Ramadass A
; Hunter E
; Green J
; Salter M
; Akoulitchev A
; Wang W
; Chng WJ
; Tenen DG
; Fullwood MJ
Sci Rep
2017[May]; 7
(1
): 2186
PMID28526829
show ga
Stretched histone regions, such as super-enhancers and broad H3K4me3 domains, are
associated with maintenance of cell identity and cancer. We connected
super-enhancers and broad H3K4me3 domains in the K562 chronic myelogenous
leukemia cell line as well as the MCF-7 breast cancer cell line with chromatin
interactions. Super-enhancers and broad H3K4me3 domains showed higher association
with chromatin interactions than their typical counterparts. Interestingly, we
identified a subset of super-enhancers that overlap with broad H3K4me3 domains
and show high association with cancer-associated genes including tumor suppressor
genes. Besides cell lines, we could observe chromatin interactions by a
Chromosome Conformation Capture (3C)-based method, in primary human samples.
Several chromatin interactions involving super-enhancers and broad H3K4me3
domains are constitutive and can be found in both cancer and normal samples.
Taken together, these results reveal a new layer of complexity in gene regulation
by super-enhancers and broad H3K4me3 domains.