Feedback amplification of fibrosis through matrix stiffening and COX-2 suppression.
Feedback amplification of fibrosis through matrix stiffening and COX-2 suppression.
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DOI:
10.1083/jcb.201004082
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发表时间:
2010-08-23
期刊:
影响因子:
--
通讯作者:
Tschumperlin DJ
中科院分区:
文献类型:
--
作者:
Liu F;Mih JD;Shea BS;Kho AT;Sharif AS;Tager AM;Tschumperlin DJ
In response to tissue stiffening, fibroblasts increase production of extracellular matrix while decreasing production of matrix-degrading enzymes and the fibrosis inhibitor prostaglandin E2. Tissue stiffening is a hallmark of fibrotic disorders but has traditionally been regarded as an outcome of fibrosis, not a contributing factor to pathogenesis. In this study, we show that fibrosis induced by bleomycin injury in the murine lung locally increases median tissue stiffness sixfold relative to normal lung parenchyma. Across this pathophysiological stiffness range, cultured lung fibroblasts transition from a surprisingly quiescent state to progressive increases in proliferation and matrix synthesis, accompanied by coordinated decreases in matrix proteolytic gene expression. Increasing matrix stiffness strongly suppresses fibroblast expression of COX-2 (cyclooxygenase-2) and synthesis of prostaglandin E2 (PGE2), an autocrine inhibitor of fibrogenesis. Exogenous PGE2 or an agonist of the prostanoid EP2 receptor completely counteracts the proliferative and matrix synthetic effects caused by increased stiffness. Together, these results demonstrate a dominant role for normal tissue compliance, acting in part through autocrine PGE2, in maintaining fibroblast quiescence and reveal a feedback relationship between matrix stiffening, COX-2 suppression, and fibroblast activation that promotes and amplifies progressive fibrosis.
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影响因子:
4.8
作者:
Fringer, J;Grinnell, F
通讯作者:
Grinnell, F
影响因子:
3.4
作者:
Harms, BD;Bassi, GM;Lauffenburger, DA
通讯作者:
Lauffenburger, DA
影响因子:
4.8
作者:
Goeckeler, ZM;Wysolmerski, RB
通讯作者:
Wysolmerski, RB
DOI:
10.1164/ajrccm.162.4.9912011
发表时间:
2000-10-01
影响因子:
24.7
作者:
Ebihara, T;Venkatesan, N;Ludwig, MS
通讯作者:
Ludwig, MS
DOI:
10.1164/ajrccm/144.5.1080
发表时间:
1991-11-01
期刊:
AMERICAN REVIEW OF RESPIRATORY DISEASE
影响因子:
--
作者:
BOROK, Z;GILLISSEN, A;CRYSTAL, RG
通讯作者:
CRYSTAL, RG