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Published on: June 26, 2018
Expression analysis of the entire MMP and TIMP gene families during mouse tissue development
Robert K Nuttall1, Clara L Sampieri, Caroline J Pennington
1School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK.
Abstract:
Matrix metalloproteinases (MMPs) and adamalysins (ADAMs) cleave many extracellular proteins, including matrix, growth factors, and receptors. We profiled the RNA levels of every MMP, several ADAMs, and inhibitors of metalloproteinases (TIMPs and RECK) in numerous mouse tissues during development and in the uterus during pregnancy. Observations include: most secreted MMPs are expressed at low to undetectable levels in tissues, whereas membrane-bound MMPs, ADAMs and inhibitors are abundant; almost every proteinase and inhibitor is present in the uterus or placenta at some time during gestation; the mouse collagenases mColA and mColB are found exclusively in the uterus and testis; and each tissue has its unique signature of proteinase and inhibitor expression.
Insights
Matrix metalloproteinases (MMPs) and adamalysins (ADAMs) are key enzymes. This study reveals their expression patterns in mouse tissues, highlighting unique tissue-specific profiles and roles during pregnancy.
Area of Science:
- Biochemistry
- Molecular Biology
- Developmental Biology
Background:
- Matrix metalloproteinases (MMPs) and adamalysins (ADAMs) are crucial enzymes involved in extracellular matrix remodeling.
- These proteases play significant roles in various physiological and pathological processes, including development, reproduction, and tissue repair.
Purpose of the Study:
- To comprehensively profile the RNA expression levels of MMPs, ADAMs, and their inhibitors (TIMPs and RECK) across diverse mouse tissues.
- To investigate the dynamic expression patterns of these enzymes and inhibitors during mouse development and pregnancy.
Main Methods:
- RNA expression profiling of all known MMPs, selected ADAMs, and metalloproteinase inhibitors (TIMPs and RECK).
- Analysis of expression patterns in various mouse tissues during embryonic and postnatal development.
- Examination of expression in the mouse uterus and placenta throughout gestation.
Main Results:
- Most secreted MMPs showed low expression, while membrane-bound MMPs, ADAMs, and inhibitors were generally abundant in tissues.
- Nearly all proteinases and inhibitors were detected in the uterus or placenta at some stage of gestation.
- Specific mouse collagenases (mColA and mColB) were exclusively expressed in the uterus and testis.
- Each tissue exhibited a distinct signature of proteinase and inhibitor gene expression.
Conclusions:
- MMP and ADAM expression is highly regulated and tissue-specific, suggesting specialized functions.
- The uterus and placenta exhibit unique proteolytic enzyme profiles crucial for pregnancy.
- These findings provide a foundational understanding of protease and inhibitor roles in tissue homeostasis and development.
