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Title: New insight into the role of MMP14 in metabolic balance

Journal Article · · PeerJ
DOI:https://doi.org/10.7717/peerj.2142· OSTI ID:1378994
 [1];  [2];  [3];  [4];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [6];  [7];  [5];  [5]
  1. Univ. of California, Davis, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Calcutta, Calcutta (India)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. de Sao Paulo, Sao Paulo (Brazil)
  4. Columbia Univ. Medical Center, New York, NY (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Kanazawa Univ., Kanazawa (Japan)
  7. Univ. of California, Davis, CA (United States)

Membrane-anchored matrix metalloproteinase 14 (MMP14) is involved broadly in organ development through both its proteolytic and signal-transducing functions. Knockout of Mmp14 (KO) in mice results in a dramatic reduction of body size and wasting followed by premature death, the mechanism of which is poorly understood. Since the mammary gland develops after birth and is thus dependent for its functional progression on systemic and local cues, we chose it as an organ model for understanding why KO mice fail to thrive. A global analysis of the mammary glands’ proteome in the wild type (WT) and KO mice provided insight into an unexpected role of MMP14 in maintaining metabolism and homeostasis. We performed mass spectrometry and quantitative proteomics to determine the protein signatures of mammary glands from 7 to 11 days old WT and KO mice and found that KO rudiments had a significantly higher level of rate-limiting enzymes involved in catabolic pathways. Glycogen and lipid levels in KO rudiments were reduced, and the circulating levels of triglycerides and glucose were lower. Analysis of the ultrastructure of mammary glands imaged by electron microscopy revealed a significant increase in autophagy signatures in KO mice. Finally, Mmp14 silenced mammary epithelial cells displayed enhanced autophagy. Applied to a systemic level, these findings indicate that MMP14 is a crucial regulator of tissue homeostasis. If operative on a systemic level, these findings could explain how Mmp14KO litter fail to thrive due to disorder in metabolism.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1378994
Journal Information:
PeerJ, Vol. 4, Issue 7; ISSN 2167-8359
Publisher:
PeerJ Inc.Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (4)

Pathobiology of the 129:Stat1 −/− mouse model of human age-related ER-positive breast cancer with an immune infiltrate-excluded phenotype journal September 2017
The Expanding Role of MT1-MMP in Cancer Progression journal May 2019
Dual functions of ARP101 in targeting membrane type-1 matrix metalloproteinase: Impact on U87 glioblastoma cell invasion and autophagy signaling journal October 2018
Beyond EGFR inhibition: multilateral combat strategies to stop the progression of head and neck cancer journal January 2019

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