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2016 ; 32
(11
): 751-761
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The Chromatin Landscape of Cellular Senescence
#MMPMID27692431
Criscione SW
; Teo YV
; Neretti N
Trends Genet
2016[Nov]; 32
(11
): 751-761
PMID27692431
show ga
Cellular senescence, an irreversible growth arrest triggered by a variety of
stressors, plays important roles in normal physiology and tumor suppression, but
accumulation of senescent cells with age contributes to the functional decline of
tissues. Senescent cells undergo dramatic alterations to their chromatin
landscape that affect genome accessibility and their transcriptional program.
These include the loss of DNA-nuclear lamina interactions, the distension of
centromeres, and changes in chromatin composition that can lead to the activation
of retrotransposons. Here we discuss these findings, as well as recent advances
in microscopy and genomics that have revealed the importance of the higher-order
spatial organization of the genome in defining and maintaining the senescent
state.