Spatial confinement downsizes the inflammatory response of macrophages.
Spatial confinement downsizes the inflammatory response of macrophages.
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DOI:
10.1038/s41563-018-0190-6
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发表时间:
2018-12
期刊:
影响因子:
41.2
通讯作者:
Vogel V
中科院分区:
文献类型:
--
作者:
Jain N;Vogel V
Macrophages respond to chemical/metabolic and physical stimuli, but their effects cannot be readily decoupled in vivo during pro-inflammatory activation. Here, we show that preventing macrophage spreading by spatial confinement, as imposed by micropatterning, microporous substrates or cell crowding, suppresses late lipopolysaccharide (LPS)-activated transcriptional programs (biomarkers IL-6, CXCL9, IL-1β, and iNOS) by mechanomodulating chromatin compaction and epigenetic alterations (HDAC3 levels and H3K36-dimethylation). Mechanistically, confinement reduces actin polymerization, thereby lowers the LPS-stimulated nuclear translocation of MRTF-A. This lowers the activity of the MRTF-A-SRF complex and subsequently downregulates the inflammatory response, as confirmed by chromatin immunoprecipitation coupled with quantitative PCR and RNA sequencing analysis. Confinement thus downregulates pro-inflammatory cytokine secretion and, well before any activation processes, the phagocytic potential of macrophages. Contrarily, early events, including activation of the LPS receptor TLR4, and downstream NF-κB and IRF3 signalling and hence the expression of early LPS-responsive genes were marginally affected by confinement. These findings have broad implications in the context of mechanobiology, inflammation and immunology, as well as in tissue engineering and regenerative medicine.
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影响因子:
41.2
作者:
Ihalainen TO;Aires L;Herzog FA;Schwartlander R;Moeller J;Vogel V
通讯作者:
Vogel V
影响因子:
29.7
作者:
Brubaker SW;Bonham KS;Zanoni I;Kagan JC
通讯作者:
Kagan JC
影响因子:
15.3
作者:
HAN, J;BROWN, T;BEUTLER, B
通讯作者:
BEUTLER, B
DOI:
10.1038/nri.2017.74
发表时间:
2017-11
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
Huse M
通讯作者:
Huse M
DOI:
10.1038/nrg2485
发表时间:
2009-01
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
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