Journal
JOURNAL OF MOLECULAR MEDICINE-JMM
Volume 87, Issue 2, Pages 125-138Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00109-008-0426-z
Keywords
TLR; Fibrosis; Inflammation; Carcinogenesis
Funding
- American Liver Foundation
- National Institutes of Health [R01DK076920-01A2, U54CA126513]
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Following acute injury, the concerted action of resident and nonresident cell populations evokes wound healing responses that entail a temporary increase in inflammation, extracellular matrix production, and proliferation to ultimately restore normal organ architecture. However, chronic injury evokes a perpetuating wound healing response promoting the development of fibrosis, organ failure, and cancer. Recent evidence points toward toll-like receptors (TLRs) as important regulators of inflammatory signals in wound healing. Here, we will review the activation of TLRs by different endogenous and bacterial TLR ligands during wound healing, and the contribution of TLR-induced signals to injury, fibrogenesis, regeneration, and carcinogenesis. We will discuss the hypothesis that TLRs act as sensors of danger signals in injured tissue to switch the wound healing response toward fibrogenesis and regeneration as a protective response to imminent danger at the cost of an increased long-term risk of developing scars and cancer.
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