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2018 ; 131
(5
): ä Nephropedia Template TP
gab.com Text
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Epithelial and stromal circadian clocks are inversely regulated by their
mechano-matrix environment
#MMPMID29361531
Williams J
; Yang N
; Wood A
; Zindy E
; Meng QJ
; Streuli CH
J Cell Sci
2018[Mar]; 131
(5
): ä PMID29361531
show ga
The circadian clock is an autonomous molecular feedback loop inside almost every
cell in the body. We have shown that the mammary epithelial circadian clock is
regulated by the cellular microenvironment. Moreover, a stiff extracellular
matrix dampens the oscillations of the epithelial molecular clock. Here, we
extend this analysis to other tissues and cell types, and identify an inverse
relationship between circadian clocks in epithelia and fibroblasts. Epithelial
cells from mammary gland, lung and skin have significantly stronger oscillations
of clock genes in soft 3D microenvironments, compared to stiff 2D environments.
Fibroblasts isolated from the same tissues show the opposite response, exhibiting
stronger oscillations and more prolonged rhythmicity in stiff microenvironments.
RNA analysis identified that a subset of mammary epithelial clock genes, and
their regulators, are upregulated in 3D microenvironments in soft compared to
stiff gels. Furthermore, the same genes are inversely regulated in fibroblasts
isolated from the same tissues. Thus, our data reveal for the first time an
intrinsic difference in the regulation of circadian genes in epithelia and
fibroblasts.