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Published on: January 13, 2018
Membrane-type MMPs are indispensable for placental labyrinth formation and development
Ludmila Szabova1, Mee-Young Son, Joanne Shi
1Craniofacial and Skeletal Diseases Branch, National Institute of Dental andCraniofacial Research, National Institutes of Health, Bethesda, MD, USA.
Blood
|September 23, 2010
Summary
Membrane-type matrix metalloproteinases (MT-MMPs), specifically MT1-MMP and MT2-MMP, are crucial for placental labyrinth development. Their interchangeable roles in placental vasculogenesis are essential for embryonic survival.
Area of Science:
- Developmental Biology
- Molecular Biology
- Cell Biology
Background:
- Membrane-type matrix metalloproteinases (MT-MMPs) regulate tissue remodeling crucial for development and homeostasis.
- The specific roles of MT-MMPs in early embryonic morphogenesis, particularly placental development, remain incompletely understood.
Purpose of the Study:
- To investigate the functions of MT1-MMP and MT2-MMP in mouse placental morphogenesis.
- To elucidate the critical roles of these MT-MMPs in labyrinth development and vasculogenesis.
Main Methods:
- Analysis of MT1-MMP and MT2-MMP expression patterns during placental development.
- Functional studies using knockdown of MT-MMP expression to assess impacts on placental and embryonic development.
- Examination of trophoblast syncytium formation and fetal vessel development in the labyrinth.
Main Results:
- Overlapping expression of MT1-MMP and MT2-MMP was observed in the placental labyrinth, essential for syncytiotrophoblast formation and fetal vasculature.
- Disruption of MT-MMP function led to impaired syncytium formation, developmental arrest, and embryonic lethality by embryonic day 11.5.
- Knockdown of either MT1-MMP or MT2-MMP specifically during labyrinth development was detrimental, while later knockdown was tolerated.
Conclusions:
- MT1-MMP and MT2-MMP play essential and interchangeable roles in placental vasculogenesis.
- This study highlights the requirement for temporally and spatially regulated MT-MMP activity during early mouse embryonic development.
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