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The role of TIMPs in regulation of extracellular matrix proteolysis

Open access
Arpino, Valerie, Brock, Michael, Gill, Sean E.·2015·Matrix Biology

Abstract

Tissue inhibitors of metalloproteinases (TIMPs), which inhibit matrix metalloproteinases (MMPs) as well as the closely related, a disintegrin and metalloproteinases (ADAMs) and ADAMs with thrombospondin motifs (ADAMTSs), were traditionally thought to control extracellular matrix (ECM) proteolysis through direct inhibition of MMP-dependent ECM proteolysis. This classical role for TIMPs suggests that increased TIMP levels results in ECM accumulation (or fibrosis), whereas loss of TIMPs leads to enhanced matrix proteolysis. Mice lacking TIMP family members have provided support for such a role; however, studies with these TIMP deficient mice have also demonstrated that loss of TIMPs can often be associated with an accumulation of ECM. Collectively, these studies suggest that the divergent roles of TIMPs in matrix accumulation and proteolysis, which together can be referred to as ECM turnover, are dependent on the TIMP, specific tissue, and local tissue environment (i.e. health vs. injury/disease). Ultimately, these combined factors dictate the specific metalloproteinases being regulated by a given TIMP, and it is likely the diversity of metalloproteinases and their physiological substrates that determines whether TIMPs inhibit matrix proteolysis or accumulation. In this review, we discuss the evidence for the dichotomous roles of TIMPs in ECM turnover highlighting some of the common findings between different TIMP family members. Importantly, while we now have a better understanding of the role of TIMPs in regulating ECM turnover, much remains to be determined. Data on the specific metalloproteinases inhibited by different TIMPs in vivo remains limited and must be the focus of future studies.

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Crossref · 10.1016/j.matbio.2015.03.005

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Metadata

Authors
Arpino, V., Brock, M., & Gill, S. E.
Venue
Matrix Biology
Publisher
Elsevier BV
Published
2015-05
Volume
44-46
Pages
247-254
ISSN
0945-053X (ISSN-L)
OpenAlex
W2036322339
Cited by
734
References
66
FWCI
15.01
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: The role of TIMPs in regulation of extracellular matrix proteolysis. https://app.cochat.ai/papers/10.1016/j.matbio.2015.03.005
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Arpino, V., Brock, M., & Gill, S. E. (2015). The role of TIMPs in regulation of extracellular matrix proteolysis. Matrix Biology. https://doi.org/10.1016/j.matbio.2015.03.005

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